JP2008164401A - Manufacturing method for timepiece dial, timepiece dial, and timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a timepiece dial of beautiful appearance giving spatial effect, having an index member fixed firmly onto a plastic base material, a manufacturing method capable of readily and surely manufacturing the timepiece dial, and to provide a timepiece provided with the timepiece dial. <P>SOLUTION: This manufacturing method for the timepiece dial 1, with at least one part of the index member 3 embedded in the plastic base material 2, has an index member installation process for installing the index member 3 at a prescribed portion of a molding die; a resin material supplying process for supplying a resin material with fluidity into the molding die; and a solidification process for solidifying the resin material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a timepiece dial manufacturing method, a timepiece dial, and a timepiece.

In general, a timepiece dial uses characters and numerals (so-called time characters, etc.), scales, symbols, and various marks having functions such as indicating time.
Printing is widely used as a method for forming such an index.
By the way, the timepiece dial is required to have a function as a practical product (for example, a function that allows a user or the like to recognize the time easily and accurately) and an aesthetic appearance as a decorative product.
For this reason, a method of forming an indicator with a more three-dimensional effect than printing by attaching and fixing a planting material called a typesetting to a substrate (a dial body) provided with an opening, in particular, It is adopted in high-class timepieces and the like (for example, see Patent Document 1).

  However, in the timepiece dial manufactured by attaching and fixing the planting material, the adhesion between the substrate and the planting material is not sufficient, and if a relatively large external force (impact force) is applied, the planting material May be detached from the substrate. Moreover, the planting material used in such a method generally has a foot part for planting the dial body, but the foot part is thinner than other parts. . For this reason, when a comparatively large external force or the like is applied, there is a problem that the foot part breaks. The above problems tend to occur more easily as the height of the planting material is higher.

In addition, the planting materials must be fixed (typesetting) to the substrate manually one by one, leading to an increase in processes and costs.
Moreover, since it is necessary to make the foot | leg part for fixation when producing a planting material, there is a restriction | limiting in height. That is, in the planting material, since the foot is generally made by forging or plastic processing, the aspect ratio is limited, and the height of the planting material (index) is limited.
In addition, in the watch dial with the planting material attached and fixed as described above, the fixing force of the planting material to the substrate is not sufficient, so there are restrictions on the width, height, and weight of the planting material. There are restrictions in terms of design, such as high-quality planting materials (indexes) cannot be used, high-quality expression and three-dimensional expression, etc., and excellent decorativeness (aesthetic appearance) It was difficult.

By the way, among various materials, plastic materials are inexpensive and have excellent moldability (degree of freedom of molding), and have excellent electromagnetic wave transmission properties (light transmission properties, radio wave transmission properties). Therefore, in order to provide a timepiece dial having a complicated shape, or to provide a timepiece dial that can be suitably applied to a solar timepiece equipped with a solar cell, or a radio timepiece, a plastic material is used. There is an increasing demand for application to timepiece dials.
However, when the substrate is made of plastic, the adhesion with the planting material (index) as described above is even lower than when a metal substrate is used. The problem becomes more pronounced.

Japanese Patent Laid-Open No. 2003-247096

  An object of the present invention is to provide a timepiece dial having a three-dimensional appearance and an excellent aesthetic appearance, in which an indicator member is firmly fixed to a plastic base material, and to easily and reliably manufacture the timepiece dial. Another object of the present invention is to provide a manufacturing method that can be used, and to provide a timepiece having the timepiece dial.

Such an object is achieved by the present invention described below.
The timepiece dial manufacturing method of the present invention is a timepiece dial manufacturing method in which a part of an index member is embedded in a plastic base material,
An indicator member installation step of installing the indicator member in a predetermined part of the mold; and
A resin material application step of applying a resin material having fluidity to the mold in which the indicator member is installed;
A solidifying step of solidifying the resin material.
Accordingly, it is possible to provide a manufacturing method that can easily and reliably manufacture a timepiece dial having a three-dimensional appearance and an excellent aesthetic appearance, in which the indicator member is firmly fixed to the plastic base material.

In the timepiece dial manufacturing method of the present invention, it is preferable that the indicator member has a concave portion or a convex portion in a portion embedded in the base material.
Thereby, the indicator member can be more firmly fixed to the base material.
In the timepiece dial manufacturing method of the present invention, it is preferable that an adhesive is applied to at least a portion of the indicator member to be embedded in the base material prior to the resin material applying step.
Thereby, the indicator member can be more firmly fixed to the base material.

In the timepiece dial manufacturing method of the present invention, it is preferable that the indicator member has been subjected to a release treatment on at least a part of the portion that should not be embedded in the base material.
Thereby, in the indicator member, it is possible to effectively prevent the resin material from adhering to an unintended portion. As a result, the aesthetic appearance of the obtained timepiece dial can be made particularly excellent.

In the timepiece dial manufacturing method of the present invention, it is preferable that at least a part of the molding die is subjected to a mold release treatment in contact with the resin material.
As a result, it is possible to easily remove and remove the base material (integrated molded product of the base material and the index member) that is a molded product, and the molded product is damaged when the mold is removed or removed. Can be more reliably prevented. As a result, the productivity of the timepiece dial is particularly excellent, and the aesthetic appearance of the obtained timepiece dial can be more reliably improved.
In the timepiece dial manufacturing method of the present invention, it is preferable that the inside of the mold is decompressed in the resin material application step.
Accordingly, the resin material can be efficiently and reliably distributed in the mold, and a timepiece dial having a desired shape can be manufactured with higher productivity.

The timepiece dial of the present invention is manufactured using the method of the present invention.
Thereby, the indicator member is firmly fixed to the plastic base material, and a timepiece dial having a three-dimensional appearance and an excellent aesthetic appearance can be provided.
The timepiece dial of the present invention is preferably a wristwatch dial.
A wristwatch is required to have an aesthetic appearance as a decorative article and is more susceptible to external forces such as impact force than other watches. Therefore, it is particularly important for a wristwatch dial to have both an aesthetic appearance and excellent durability. For this reason, the effect of the present invention is more remarkably exhibited when applied to a wristwatch dial.
The timepiece of the present invention includes the timepiece dial of the present invention.
Thereby, it is possible to provide a timepiece having an aesthetic appearance and excellent durability.

  According to the present invention, an indicator member is firmly fixed to a plastic base material, and a timepiece dial having a three-dimensional appearance and an excellent aesthetic appearance is provided, and the timepiece dial is easily and reliably manufactured. The manufacturing method which can be provided, and the timepiece provided with the timepiece dial can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. Note that the drawings referred to in this specification show part of the configuration in an emphasized manner, and do not accurately reflect actual dimensions and the like.
First, a preferred embodiment of the timepiece dial of the present invention will be described.
1 is a plan view showing a preferred embodiment of a timepiece dial of the present invention, FIG. 2 is a cross-sectional view of the timepiece dial shown in FIG. 1, and FIG. 3 is a timepiece dial shown in FIG. FIG. 4 is a schematic plan view for explaining an example of the shape (pattern) of the opening included in the coating, and FIG. 5 is the shape of the opening included in the coating ( It is a typical top view for explaining other examples of a pattern.
The timepiece dial 1 is used, for example, in a solar timepiece having a solar battery.
As shown in FIGS. 1 and 2, the timepiece dial 1 of the present embodiment includes a base material 2 and an index member 3 disposed on a first surface 21 that is one main surface of the base material 2. The coating 4 is formed on the second surface 22 which is the main surface opposite to the first surface 21 of the substrate 2.

[Base material]
The base material 2 is mainly composed of a plastic material.
Plastic materials are generally lightweight and have excellent moldability and processability. For this reason, the dial 1 for timepieces which is comparatively lightweight and easy to carry can be provided. Even a timepiece dial 1 having a complicated shape can be provided easily and reliably. In addition, since plastic materials generally have excellent electromagnetic wave transmission properties (light transmission properties, radio wave transmission properties, etc.), a timepiece dial plate 1 having a base material 2 made of a plastic material is a solar material. The present invention can be suitably applied to a solar timepiece, a radio timepiece, a solar timepiece, and the like equipped with a battery.

Examples of the plastic material constituting the substrate 2 include various thermoplastic resins, various thermosetting resins, and the like. For example, polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS resin), polymethyl methacrylate ( Acrylic resins such as PMMA), polyolefin resins such as polyethylene (PE) and polypropylene (PP), polyester resins such as polyethylene terephthalate (PET), and copolymers, blends, and polymer alloys mainly containing these resins. These can be used, and one or more of these can be used in combination (for example, as a blend resin, polymer alloy, laminate, etc.). In particular, the substrate 2 is preferably mainly composed of polycarbonate and / or acrylonitrile-butadiene-styrene copolymer. Thereby, especially the intensity | strength as the timepiece dial 1 whole can be made excellent. In addition, when the timepiece dial 1 is manufactured, since the degree of freedom of molding the base material 2 is increased (easiness of molding is improved), even if the timepiece dial 1 has a more complicated shape, It can be manufactured easily and reliably. Further, when the substrate 2 is made of a material containing at least one selected from polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS resin), the adhesion between the substrate 2 and the coating film is achieved. The property can be made particularly excellent. Polycarbonate is relatively inexpensive among various plastic materials, and can contribute to further reduction in production cost of the timepiece dial 1. The ABS resin also has particularly excellent chemical resistance, and the durability of the timepiece dial 1 as a whole can be further improved.
In addition, the base material 2 may contain components other than a plastic material. Examples of such components include plasticizers, antioxidants, colorants (including various color formers, fluorescent substances, phosphorescent substances, etc.), brighteners, fillers, and the like.

The base material 2 may have a substantially uniform composition at each site, or may have a different composition depending on the site.
The shape and size of the base material 2 are not particularly limited, and are usually determined based on the shape and size of the timepiece dial 1. In the illustrated configuration, the base material (substrate) 2 has a flat plate shape, but may have a curved plate shape, for example.
The color of the substrate 2 is not particularly limited and may be any material, but the substrate 2 is white or substantially transparent (for example, the light transmittance in the visible light region is 90% or more). ), The aesthetic appearance of the timepiece dial 1 (particularly the aesthetic appearance when applied to the timepiece 100) can be made particularly excellent, and the timepiece dial 1 and the timepiece 100 are more excellent. It can have a high-class feeling. Further, when the substrate 2 is substantially transparent (more specifically, the transmittance of light in the visible light region is 90% or more), the transmittance of light as the timepiece dial 1 is It can be made higher, can be suitably applied to a solar timepiece (solar radio timepiece) as will be described later, and can contribute to the downsizing of a solar cell provided in the solar timepiece.

  Although the average thickness of the base material 2 is not specifically limited, It is preferable that it is 200-700 micrometers, and it is more preferable that it is 300-600 micrometers. When the average thickness of the base material 2 is a value within the above range, when the timepiece dial 1 is applied to a solar timepiece, the light transmission of the timepiece dial 1 is sufficiently high, and the solar cell It is possible to more effectively prevent the self color from being seen through, and the decorativeness (aesthetic appearance) can be made particularly excellent.

[Indicator material]
The indicator member 3 includes an embedded portion 31 embedded in the base material 2 and a display portion 32 exposed on the first surface 21 side (outer surface side, upper side in FIG. 2) of the base material 2. The display unit 32 is visible from the outside and is a part that functions as an index.
Examples of the indicator member 3 include letters and numbers (so-called time letters and the like), scales, symbols, various marks, and the like having a function of indicating time and the like.

In the configuration shown in FIG. 1, the index members 3 are respectively arranged at portions corresponding to the respective times (from 0 (12) to 11:00) in the region on the outer peripheral side of the surface of the base material 2.
A part of the indicator member 3 is fixed to the base material 2 by being embedded in the base material 2. In the present invention, as described later, when the base material is molded, the base member 2 is fixed. The indicator member is embedded in the material. Thereby, an indicator member can be fixed to a substrate simply and firmly. As a result, the timepiece dial is excellent in durability, and even when a relatively large external force (impact force) is applied, the indicator member (indicator) is effectively removed from the base material. Can be prevented. In addition, since the fixing force of the index member into the base material is excellent, restrictions on the weight and height of the index member are eased. That is, even when the height of the index member (the height of the display unit) is relatively high, it is possible to reliably prevent the index member (index) from dropping from the base material. Thereby, an expression with a more three-dimensional feeling (height) is possible, and a timepiece dial having a wide design width and excellent decorativeness (aesthetic appearance) can be provided.

The indicator member 3 may be made of any material, but is preferably made of a metal material. Thereby, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent.
Various metals (including alloys) can be used as the metal material constituting the index member 3, preferably Fe, Cu, Zn, Ni, Mg, Cr, Mn, Mo, Nb, Al, V, Zr. Sn, Au, Pd, Pt, Ag, Co, In, W, Ti, Rh, Ir, Os, Re, Hf, and alloys containing at least one of these. The indicator member 3 includes at least one selected from Ag, Cr, Au, Al, Ti, Sn, In, Zn, Cu, Pt, W, Ir, Os, and Re, among the materials as described above. It is preferable that it is composed of materials (including alloys). Thereby, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent. In addition, materials with high specific gravity such as Au, Pt, W, Ir, Os, Re, etc., are too heavy for conventional planting materials, making it difficult to maintain adhesion to the substrate. Although it was difficult to apply to a relatively high index, according to the present invention, even when an index member made of such a material is used, the durability of the timepiece dial is sufficiently excellent Can be.

Examples of the method for manufacturing the index member 3 include casting, forging, pressing, electroforming, cutting, and the like.
The surface of the index member 3 (at least the surface of the display unit 32) may be subjected to a surface treatment such as plating. Thereby, it can be set as the timepiece dial 1 which is more excellent in decorativeness and has a high-class feeling.

  In the configuration shown in the figure, the indicator member 3 is a thin plate having a rod shape (rectangular shape) when viewed in plan, but the shape of the indicator member 3 is not limited to this, for example, , Numerals (Arabic numerals, Roman numerals, etc.), figures (triangles, circles, etc.), and wavy shapes can be used. Further, the arrangement position and the number of the indicator members 3 are not particularly limited, and can be arbitrarily determined as necessary. This expands design variations. As a result, the decorativeness of the timepiece dial 1 can be made particularly excellent.

The size of the index member 3 depends greatly on the design and the like, and is not particularly limited, but preferably satisfies the following conditions.
That is, the width (width of the display unit 32) w of the index member 3 is preferably, for example, 0.1 to 3.0 mm, and more preferably 0.2 to 2.5 mm. When the width of the indicator member 3 (the width of the display portion 32) w is a value within the above range, the watch dial 1 has sufficiently excellent durability (adhesion between the base material 2 and the indicator member 3). In general, however, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent. In addition, according to the present invention, the timepiece dial is sufficiently durable even with the relatively small index as described above, which is difficult to realize with the conventional method using the planting material. Can be suitably formed. Therefore, when the width (width of the display part 32) w of the indicator member 3 is a value within the above range, the effect of the present invention is more remarkably exhibited.

  The length 1 of the indicator member 3 is preferably 0.5 to 10 mm, for example, and more preferably 2.0 to 8.0 mm. When the length l of the indicator member 3 is a value within the above range, in general, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent. Further, when the length 1 of the index member 3 is a value within the above range, it is possible to effectively prevent the occurrence of an interface called a weld line in the vicinity of the index member 3 in the manufacturing method as described later. It is possible to reliably improve the aesthetic appearance of the timepiece dial 1.

  In addition, the height h of the index member 3 is preferably 200 to 1700 μm, and more preferably 350 to 1400 μm, for example. When the height h of the indicator member 3 is a value within the above range, the watch dial 1 is generally excellent in durability (adhesiveness between the base material 2 and the indicator member 3), and in general, a watch The dial 1 can have a three-dimensional appearance and a particularly excellent aesthetic appearance. In addition, according to the present invention, the durability of the timepiece dial can be improved even with the relatively high index as described above, which is difficult to realize with the conventional method using the planting material. It can be suitably formed as a sufficiently excellent one. Therefore, when the height h of the index member 3 is a value within the above range, the effect of the present invention is more remarkably exhibited.

Further, the height h ₁ of the embedded portion 31 is preferably, for example, 100 to 1000 μm, and more preferably 200 to 800 μm. When the height h ₁ of the embedded portion 31 is a value within the above range, the durability of the timepiece dial 1 (adhesion between the base material 2 and the indicator member 3) can be made particularly excellent.
The height _{h 2} of the display unit 32, for example, is preferably from 100～700Myuemu, and more preferably 150～600Myuemu. If the height h ₂ of the display unit 32 is within this range, while the excellent durability of the timepiece dial 1 (the adhesion between the substrate 2 and the reference member 3) sufficiently, in general, The timepiece dial 1 can have a three-dimensional effect and a particularly excellent aesthetic appearance. In addition, according to the present invention, the durability of the timepiece dial can be improved even with the relatively high index as described above, which is difficult to realize with the conventional method using the planting material. It can be suitably formed as a sufficiently excellent one. Therefore, when the height h ₂ of the display unit 32 is within this range, the effect of the present invention are more remarkably exhibited.

Further, to the total height h of the reference member 3, the ratio of the height of _{h 1} of the buried portion 31 is not particularly limited, for example, it is preferably from 30 to 80%, and 40% to 70% More preferred. When the ratio of the height of the embedded portion 31 is a value within the above range, the durability of the timepiece dial 1 (adhesion between the base material 2 and the indicator member 3) is generally excellent, The timepiece dial 1 can have a three-dimensional effect and a particularly excellent aesthetic appearance.

  Further, when the size (dimension) of the index member 3 satisfies the above conditions, the flow of the resin material 23 injected into the molding die 7 when the substrate 2 is molded in the manufacturing method described later. Is effectively embedded in the base member 2 while effectively preventing the indicator member 3 from being obstructed. Thereby, the timepiece dial 1 excellent in aesthetic appearance and durability can be more reliably manufactured.

  In the present embodiment, the embedded portion 31 is provided with a recess 33 on the surface thereof. By having such a concave portion 33, the indicator member 3 and the base material 2 are bitten into each other in the embedded portion 31, and the indicator member 3 is more easily fixed and more stably fixed. Thereby, the fixing force in the base material 2 of the index member 3 can be improved, and the durability of the timepiece dial 1 can be further improved.

  The concave portion 33 may have any shape. For example, the cross-sectional shape may be a semicircular shape, a polygonal shape, or the like. In FIG. The case where it formed is shown. When the concave portion 33 has such a shape, the above-described effects are more remarkably exhibited. Moreover, the above effects are similarly obtained not only when the embedded portion has a concave portion but also when the embedded portion has a convex portion.

  Moreover, in this invention, since the adhesiveness of an index member and a base material can be made excellent, the index member (index | index) with the height and weight which was difficult to apply with the conventional planting material ) Can be suitably applied. For this reason, the range of high-quality index, texture variation creation and selection flexibility, which was difficult to express in the past, is widened. In addition, it is possible to use an index member (index) made of a material having a high specific gravity (for example, Ir, Os, Pt, W, Au, Re, etc.) that has been difficult to apply in the past. As a result, it is possible to provide a timepiece dial having an appearance that has been difficult to express in the past.

[Coating]
The coating 4 is provided on the second surface 22 side (inner surface side, lower side in FIG. 2) of the substrate 2.
By having such a coat 4, for example, the watch dial 1 as a whole can have an appearance according to the color tone of the coat 4, and the aesthetic appearance of the watch dial 1 is particularly excellent. Can do.

  The coating 4 may be composed of any material, and examples of the constituent material include various metal materials, various ceramic materials, and various colorants. Among these, a metal material is preferable as the constituent material of the coating 4. Thereby, the watch dial 1 as a whole can have a glossy appearance peculiar to a metal material, and the aesthetic appearance of the watch dial 1 as a whole can be made particularly excellent.

  Various metals (including alloys) can be used as the metal material constituting the coating 4, and preferably Fe, Cu, Zn, Ni, Mg, Cr, Mn, Mo, Nb, Al, V, Zr, Examples thereof include Sn, Au, Pd, Pt, Ag, Co, In, W, Ti, Rh, and Hf, and alloys containing at least one of these. The coating 4 is composed of a material (including an alloy) including at least one selected from Ag, Cr, Au, Al, Ti, Sn, and In, among the materials described above. preferable. Thereby, while making the adhesiveness of the film 4 and the base material 2 especially excellent, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent. Further, when the coating 4 is made of the material as described above, the size of the opening 41 described later is relatively large, or the opening 41 occupies the entire surface of the coating 4 (effective area of the coating 4). Even when the area ratio is relatively large, the presence of the opening 41 can be made less noticeable in appearance. In addition, the film 4 may contain components other than a metal material.

  The average thickness of the coating 4 is not particularly limited, but is preferably 0.005 to 1.5 μm, more preferably 0.007 to 0.9 μm, and 0.01 to 0.5 μm. Is more preferable. When the average thickness of the coating 4 is within the above range, the aesthetic appearance of the timepiece dial 1 can be made particularly excellent while sufficiently preventing the internal stress of the coating 4 from increasing. . Further, the adhesion between the substrate 2 and the coating 4 can be made particularly excellent. Further, the light transmittance of the timepiece dial 1 as a whole can be made sufficiently large. On the other hand, if the average thickness of the film 4 is less than the lower limit value, depending on the constituent material of the film 4, it becomes difficult to fully exhibit the characteristics of the film 4 such as gloss and color tone. It may be difficult to sufficiently enhance the aesthetic appearance of the entire plate 1. Further, if the average thickness of the coating 4 is less than the lower limit value, pinholes are likely to be generated in the coating 4 depending on the method for forming the coating 4 or the like. In addition, depending on the constituent material of the coating film 4, it may be difficult to sufficiently improve the adhesion between the substrate 2 and the coating film 4. Moreover, when the average thickness of the film 4 exceeds the upper limit, the variation in film thickness at each part of the film 4 tends to increase. Further, when the average thickness of the coating 4 is particularly large, the internal stress of the coating 4 becomes high and cracks and the like are likely to occur. In addition, when the average thickness of the coating 4 exceeds the upper limit, the light transmittance of the timepiece dial 1 as a whole tends to decrease, which may be difficult to apply to a solar timepiece.

  Further, the coating 4 may or may not have a uniform composition at each site. For example, the coating 4 may be one in which the component (composition) sequentially changes in the thickness direction (gradient material). The coating 4 may be a laminate having a plurality of layers. Thereby, for example, the aesthetic appearance as the timepiece dial 1 can be further enhanced while the adhesion to the base material 2 is particularly excellent.

  In the illustrated configuration, the coating 4 is provided with minute openings 41 penetrating in the thickness direction at a predetermined ratio. Thereby, the light incident from the outside (light incident from the first surface 21 side of the base material 2) can be sufficiently transmitted while the effect on the appearance by the coating 4 is exhibited. Thereby, the dial 1 for timepieces can be applied suitably to a solar timepiece (timepiece provided with solar cells) or the like.

  The occupation ratio of the opening 41 in the region where the opening 41 is provided when viewed in plan is not particularly limited, but is preferably 15 to 45%, more preferably 20 to 42%. Preferably, it is 25 to 38%. When the area ratio occupied by the opening 41 is less than the lower limit value, the light transmittance of the timepiece dial 1 as a whole cannot be sufficiently increased depending on the constituent material, thickness, and the like of the coating 4. On the other hand, when the area ratio occupied by the opening 41 exceeds the upper limit, the presence of the opening 41 tends to be conspicuous, and the aesthetic appearance of the timepiece dial 1 is deteriorated.

  The shape of the opening 41 is not particularly limited. For example, the shape when viewed in plan may be any shape such as a substantially circular shape, a substantially elliptical shape, a substantially polygonal shape, a slit shape, or a lattice shape. For example, as shown in FIGS. 4 and 5, the shape of the portion 41 is provided so as to surround a large number of island-shaped regions formed of the coating 4 when viewed in plan. preferable. Thereby, in the appearance of the timepiece dial 1, the presence of the opening 41 can be made inconspicuous, and the productivity of the timepiece dial can be made particularly excellent.

  Moreover, it is preferable that the width | variety of the opening part 41 represented by W in a figure is 10-150 micrometers, It is more preferable that it is 15-140 micrometers, It is further more preferable that it is 20-130 micrometers. When the width W of the opening 41 is a value within the above range, the aesthetic appearance (aesthetics) of the timepiece dial 1 is particularly excellent while sufficiently improving the electromagnetic wave transmission as the timepiece dial 1. Can be. On the other hand, when the width W of the opening 41 is less than the lower limit value, it is difficult to sufficiently increase the transmittance of the electromagnetic wave as the entire timepiece dial 1 depending on the ratio of the occupied area of the opening 41. There is a possibility. On the other hand, if the width W of the opening 41 exceeds the upper limit, depending on the constituent material and thickness of the coating 4, it may be difficult to make the appearance of the timepiece dial 1 sufficiently excellent. There is.

  Moreover, it is preferable that the pitch of the opening part 41 represented by P in a figure is 70-550 micrometers, it is more preferable that it is 80-500 micrometers, and it is further more preferable that it is 90-450 micrometers. When the pitch P of the openings 41 is a value within the above range, the aesthetic appearance (aesthetics) of the timepiece dial is particularly excellent while the electromagnetic wave transmission as the timepiece dial 1 is sufficiently high. Can be. On the other hand, when the pitch P of the openings 41 is less than the lower limit value, it is difficult to make the appearance of the timepiece dial 1 sufficiently excellent depending on the constituent material and thickness of the coating 4. There is a possibility. On the other hand, if the pitch P of the openings 41 exceeds the upper limit, depending on the ratio of the area occupied by the openings 41, it may be difficult to sufficiently increase the electromagnetic wave transmittance of the timepiece dial 1 as a whole. There is. Note that the pitch of the openings 41 refers to the center-to-center distance between the adjacent openings 41 and 41, and when there are a plurality of adjacent openings 41, the pitch between the adjacent openings 41 Refers to the distance between centers.

When the coating 4 is made of a metal material, an oxide layer (not shown) made of a metal oxide may be provided between the substrate 2 and the coating 4. Thereby, the adhesiveness of the base material 2 and the coating film 4 can be made especially excellent.
In the case of having such an oxide layer, the metal oxide constituting the oxide layer preferably has a composition containing the metal material constituting the coating 4 and a common metal element. Thereby, the adhesiveness with the film 4 can be further improved.

<Manufacturing method of timepiece dial>
Next, a method for manufacturing the timepiece dial described above will be described.
In the present invention, when the base material is molded, a part of the index member is embedded in the base material by setting the index member in a mold. In other words, the present invention is characterized in that the base material is formed integrally with the indicator member. Thereby, an indicator member can be fixed to a substrate simply and firmly. As a result, the timepiece dial is excellent in durability, and even when a relatively large external force (impact force) is applied, the indicator member (indicator) is effectively removed from the base material. Can be prevented. In addition, since the fixing force of the index member into the base material is excellent, restrictions on the weight and height of the index member are eased. That is, even when the height of the index member (the height of the display unit) is relatively high, it is possible to reliably prevent the index member (index) from dropping from the base material. Thereby, an expression with a more three-dimensional feeling (height) is possible, and a timepiece dial having a wide design width and excellent decorativeness (aesthetic appearance) can be provided. Further, according to the present invention, the productivity of the timepiece dial is also improved.

Moreover, in the conventional method of attaching and fixing (planting) a planting material having a foot part, for example, when a planting material having a thin design is used, the planting material is assumed to have transparency. There was a problem that the foot part of the sword was seen and the quality of the appearance was deteriorated. In order to hide the foot, it is necessary to make the width of the indicator member sufficiently large (for example, 400 μm or more), and there is a limit from the viewpoint of improving the aesthetic appearance. On the other hand, in this invention, it is not necessary to provide a foot | leg part which the conventional planting material has in a parameter | index member, and the inconvenience that a foot | leg part can see through can be prevented. In addition, by using an index member formed straight from the inside of the base material, the observer can recognize that the height of the apparent display portion is higher than the height actually exposed from the base material. Can do. That is, it looks as if the height has been increased so far, and a more three-dimensional expression is possible. Further, the lower limit of the width of the index member (the width of the display portion) is widened, and a small area and high index can be used.
As a result, in the present invention, various design expressions such as a three-dimensional expression can be made on the index member, and a variety of high-quality patterns, textures, and color tones can be created and the range of freedom of selection is widened.

[Molding equipment]
FIG. 6 is a cross-sectional view showing an example of a molding device used in manufacturing the timepiece dial of the present invention, and shows a state in which a molding die is opened. FIG. 7 shows a molding device shown in FIG. It is sectional drawing which shows the state which closed the shaping | molding die. 8 is a plan view schematically showing the flow of the resin material injected into the mold, and FIG. 9 is a molded product (index) manufactured using the molding apparatus shown in FIGS. FIG. 10 is a diagram for explaining the traveling direction of vapor-phase film-forming particles when a coating is formed.
The molding apparatus 6 includes a molding die 7 and a resin supply means 9 for supplying the molten resin material 23 to the molding die 7.

The molding die 7 has an upper die 71 as a movable die (cavity) and a lower die 72 as a fixed die (core).
The molding die 7 is disposed in a box 8 composed of a frame body 82 and a lid body 81. Specifically, the lower mold 72 of the mold 7 is fixed to the frame body 82, and the upper mold 71 of the mold 7 is fixed to the lid 81. Further, a seal member 811 is disposed at a joint portion of the lid body 81 with the frame body 82.

  The upper mold 71 is formed with a concave mold portion 711 corresponding to the shape of the substrate 2, and the lower mold 72 is formed with a concave mold portion 721 corresponding to the shape of the substrate 2. These mold parts 711 and 721 serve as spaces for forming the shape of the molded product (base material 2). Further, in order to fix the index member 3 during molding, a recess 722 for storing and fixing the index member 3 is provided at a predetermined position of the lower mold 72. FIG. 6 shows a state in which the index member 3 is disposed in the recess 722.

  The recess 722 is provided with a pressing pin (not shown). The pressing pin regulates the position of the index member 3 so that the extending direction of the index member 3 is parallel to the mold closing directions of the upper mold 71 and the lower mold 72 so that the index member 3 is inserted into the mold portion 711. The upper mold 71 can be positioned with respect to the lower mold 72 when closed. The pressing pin prevents the indicator member 3 from being lifted when the resin material 23 is injected, and can effectively prevent the indicator member 3 from being displaced.

Further, the resin supply means 9 has a runner 91 serving as a passage for injecting the fluid resin material 23 into the mold parts 711 and 712 and a gate 92 serving as an injection port when the mold 7 is closed. is doing. A resin material supply device 94 that supplies the fluid resin material 23 is connected to the runner 91 via a pipe 93.
The gate 92 is provided at the center of the mold part 711 of the upper mold 71, which is a position higher than the index member 3.

Further, a discharge pipe 821 is provided on the side wall of the frame body 82 (the left side wall in FIG. 6), and the discharge pipe 821 is connected to the vacuum pump 824 via a pipe 822 and a valve 823. When the vacuum pump 824 is driven, the air in the box 8 is discharged from the discharge pipe 821 and the inside of the box 8 is decompressed.
Further, the upper mold 71 is provided with a discharge hole 712, and the mold parts 711 and 721 communicate with the hollow part 83 in the box 8 through the discharge hole 712.

The inside of the box 8 is depressurized by driving the vacuum pump 824 and discharging the air in the box 8 from the discharge pipe 821. At this time, the air in the mold parts 711 and 721 is sucked into the hollow part 83 in the box 8 through the discharge hole 712 and the mold parts 711 and 721 are also decompressed.
Then, as shown in FIG. 7, the resin material 23 melted by a known method from the gate 92 through the runner 91 under a predetermined molding condition with the molding die 7 closed is placed in the die parts 711 and 721. The solidified resin material 23 is solidified and then taken out to obtain a molded product (base material 2 integrally formed with the indicator member 3).

  The manufacturing method of the present embodiment includes <1> a step of applying a release agent to the surface of the mold (release agent application step), and <2> applying an adhesive to at least a portion of the index member that contacts the resin material. Step (adhesive application step), <3> step of installing an indicator member at a predetermined part of the mold (index member installation step), and <4> step of applying a fluid resin material to the mold (Resin material applying step) and <5> a step of solidifying the resin material (solidifying step).

Hereinafter, each step of the timepiece dial manufacturing method will be described in detail.
[Releasing agent application step (release processing step)]
First, a release agent is applied to the surface of the mold 7.
Prior to applying the resin material 23 in the mold 7, a release agent is applied to at least a part of the part of the mold 7 (mold parts 711, 721) that contacts the resin material 23 (mold release treatment). . Thereby, after hardening of resin, mold release and the taking-out of the molded article (base material 2 integrally formed with the index member 3) can be easily performed.

The release agent used for the release treatment is not particularly limited. For example, normal release such as phosphate ester, fluorine-containing organosilicon compound, fluorine release agent, silicon release agent and hydrocarbon release agent. Various compounds used as agents can be used as appropriate.
As phosphate ester, the 1 or more types of phosphate ester chosen from the monoester, diester, and triester which are represented with the following general formula can be used, for example.

（式中、Ｒは、炭素数が１から２０の炭化水素基で、ｎは、１から３の整数を表す。ただし、ｎが２および３の場合、１分子中のＲは同一でも異なっていてもよい。）

(In the formula, R is a hydrocarbon group having 1 to 20 carbon atoms, and n represents an integer of 1 to 3. However, when n is 2 or 3, R in one molecule is the same or different. May be.)

  In this specific example, when n = 1, monomethyl acid phosphate, monoethyl acid phosphate, monopropyl acid phosphate, monobutyl acid phosphate, monohexyl acid phosphate, monooctyl acid phosphate, monodecyl acid phosphate, monododecyl acid phosphate, Monotetradecyl acid phosphate, monohexadecyl acid phosphate, monooctadecyl acid phosphate, etc. When n = 2, dimethyl acid phosphate, diethyl acid phosphate, dipropyl acid phosphate, dibutyl acid phosphate, dihexyl acid phosphate, dioctyl acid phosphate, Didecyl acid phosphate, didodecyl acid phosphate , Ditetradecyl acid phosphate, dihexadecyl acid phosphate, dioctadecyl acid phosphate, di-2-ethylhexyl acid phosphate, dibenzyl acid phosphate, diphenyl acid phosphate, etc., when n = 3, trimethyl phosphate, triethyl acid phosphate, Examples include tripropyl phosphate, tributyl phosphate, trihexyl phosphate, trioctyl phosphate, tridecyl phosphate, tridodecyl phosphate, tritetradecyl phosphate, trihexadecyl phosphate, trioctadecyl phosphate and the like.

  As the fluorine-containing organosilicon compound, an organosilicon compound having a perfluoroalkyl group is preferable. Specific examples include KBM-7103, KBM-7803, KP-801M, and X-70-814 manufactured by Shin-Etsu Chemical Co., Ltd. And TSL8257 manufactured by Toshiba Silicon Corporation. In addition, when using these compounds, it is also possible to apply them after hydrolysis if necessary.

Fluorine-based mold release agents include perfluoroalkylsulfonic acid ammonium salts, perfluoroalkylsulfonic acid potassium salts, perfluoroalkylcarboxylic acid potassium salts and other anionic types, perfluoroalkyl quaternary ammonium iodides, etc. Nonionic types such as cation type, perfluoroalkyl polyoxyethylene ethanol, and fluorinated alkyl ester can be mentioned.
As the silicon release agent, a nonionic type in which the hydrophobic group is composed of methylpolysiloxane and the hydrophilic group is composed of polyalkylene oxide is preferable. Specific examples include L series, Y series, and FZ series manufactured by Nippon Unicar Co., Ltd.

  Examples of the hydrocarbon-based mold release agent include phosphate esters, alkyl phosphate ester salts, alkyl quaternary ammonium salts, and the like. Examples of the alkyl quaternary ammonium salts include stearyl trimethyl ammonium chloride, dimethyl ethyl cetyl ammonium chloride, dodecyl triethyl ammonium chloride, benzyl trimethyl ammonium chloride, lauryl trimethyl ammonium bromide, lauryl trimethyl ammonium chloride and the like.

The method for applying the release agent to the mold 7 (die portions 711 and 721) is not particularly limited, and examples thereof include a spray method and a brush coating method using a release agent solution.
Moreover, a mold release agent supply port may be provided in the mold 7 and the mold release agent may be injected into the mold 7 from the mold release agent supply port. In this case, before supplying the mold release agent to the mold 7 or at the same time as supplying the mold release agent, the inside of the mold 7 is decompressed by exhausting through the exhaust port (discharge hole 712). preferable. Thereby, when an exhaust flow is generated by exhausting, the mold release agent can be drawn to the exhaust port side, and the mold release agent is decompressed so that the mold release agent is away from the supply port. The release agent can be applied to a wider range of the inner wall of the mold 7.

The mold release treatment as described above need not be performed every time when a molded product is repeatedly produced. Further, the mold release treatment may be, for example, formation of a film made of a fluorine resin or the like on the surface of the mold part.
Further, for example, as the mold 7, a mold having a film made of diamond-like carbon may be used on at least a part of a portion that contacts the resin material 23. Thereby, the mold release property of the molded product can be improved, and the durability of the mold 7 can be made particularly excellent.

[Adhesive application process]
Prior to the resin material application step to be described later, an adhesive is applied to at least a part of a portion (a portion in contact with the resin material 23) to be embedded in the base member 2 of the index member 3. Thereby, the fixing force of the index member 3 to the base material 2 can be further improved.
This step can be performed, for example, by applying an adhesive to the surface of the index member 3 formed into a predetermined shape by a method such as casting, forging, pressing, electroforming, cutting, or the like.

Examples of adhesives include oil-based acrylic resins, epoxy resins (including epoxy adhesives), polyethylene resins, olefin resins such as ethylene-vinyl acetate copolymers, olefin elastomers, urethane elastomers, silicone resins, and silanes. A coupling agent, a natural rubber adhesive, or the like can be used.
Examples of the method for applying the adhesive include spraying, dipping, and brushing.

  In addition, for example, a primer treatment agent (undercoat treatment agent) may be applied to the index member before applying a silane coupling agent, an epoxy resin, or an epoxy adhesive. Thereby, the fixing force of the index member 3 to the base material 2 can be further improved. Usually, the kind of primer treatment agent differs depending on the kind of the resin material (plastic material) constituting the index member 3, the adhesive, and the base material 2, but for the epoxy resin and epoxy adhesive, polystyrene having high crystallinity is used. A certain syndiotactic polystyrene etc. can be used conveniently.

[Indicator member installation process]
Next, the index member 3 is installed at a predetermined part of the mold 7.
In the molding die 7, a fixing recess 722 is formed at a predetermined position corresponding to the index member 3 in the mold portion 721 of the lower mold 72, and the index member 3 is installed by fitting into the recess 722. .

Further, for example, the index member 3 may be adsorbed and fixed to the molding die 7 by providing the lower mold 72 with an adsorption portion (not shown) and supporting the index member 3 on the adsorption portion. Thereby, it can prevent more reliably that the indicator member 3 floats at the time of injection | pouring of the resin material 23, and can prevent the position shift of the indicator member 3 more reliably.
In addition, it is preferable that the indicator member 3 installed in the molding die 7 in this step is one in which a mold release process has been performed on at least a part of the portion (display unit 32) that should not be embedded in the base material 2. . Thereby, in the indicator member 3, it can prevent effectively that the resin material 23 adheres to an unintentional site | part (display part 32). As a result, the aesthetic appearance of the obtained timepiece dial 1 can be made particularly excellent. As the mold release treatment for the indicator member 3, the application of a release agent as exemplified in the release agent application step, the formation of a film composed of a fluorine-based resin, and the formation of a film composed of diamond-like carbon Etc.

[Resin material application process]
Next, a resin material 23 having fluidity is applied to the mold 7 (resin material application step).
Specifically, as shown in FIG. 7, the resin material 23 melted from the gate 92 through the runner 91 is molded with the molding die 7 (the mold portion 711, 721).

  In the present embodiment, in the molding die 6, the gate 92 is provided at a position higher than the index member 3 (upper die 71), and the gate 92 is provided in the center of the die portion 711, and the resin material 23 is injected therefrom. As a result, when the resin material 23 is injected, the flow of the resin material 23 becomes a so-called down flow, and flows from the top to the bottom. Further, as shown in FIG. 7, since the gate 92 is provided near the center of the mold part 711, the resin material 23 injected from the gate 92 into the mold parts 711 and 721 is near the center of the mold part. It spreads toward the outer periphery side. In addition, since the index member 3 is radially arranged on the outer peripheral portion of the mold portion 721, the resin material 23 flows along the longitudinal direction of the index member 3 (the direction of the length l in FIG. 3). become. By such a flow of the resin material 23, the index member 3 is prevented from being lifted when the resin material is injected, and the positioning state by the concave portion 722 is maintained, so that the displacement of the index member 3 can be reliably prevented. In addition, the flow of the resin material 23 as described above allows the base material 2 to be suitably molded without hindering the flow of the resin material 23 injected into the molding die 7 by the index member 3, and is preferably indexed. The member 3 can be embedded in the substrate 2 integrally.

The temperature of the resin material 23 in this step (the temperature of the resin material 23 injected into the mold 7) is not particularly limited. For example, when the melting point of the resin material 23 is T _m [° C.], T _m to (T _m +150) [° C.] is preferable, and (T _m +10) to (T _m +100) [° C.] is more preferable. By making the temperature of the resin material 23 within the above range, the moldability of the base material 2 is made particularly excellent while preventing unintentional modification of the resin material 23, and the production of the timepiece dial 1 The property can be made particularly excellent. Moreover, the energy efficiency at the time of shaping | molding can also be made favorable.

Moreover, the injection pressure (injection pressure) of the resin material 23 injected into the mold 7 is not particularly limited, but is preferably 90 to 100 MPa, for example. By setting the pressure to a value within the above range, the resin material 23 can be more reliably distributed in the mold 7 and the base material 2 having a desired shape can be more reliably molded.
The temperature of the mold 7 in this step is not particularly limited. For example, when the melting point of the resin material 23 is T _m [° C.], the temperature is T _m + to (T _m +200) [° C.]. _preferably, and more preferably _{(T m +50) ~ (T} m +150) [℃]. By making the temperature of the molding die 7 a value within the above range, the moldability of the base material 2 is made particularly excellent while preventing unintentional modification of the resin material 23, and the production of the timepiece dial 1 The property can be made particularly excellent. Moreover, the energy efficiency at the time of shaping | molding can also be made favorable.

Further, in the present embodiment, it is preferable to reduce the pressure inside the mold 7 (mold parts 711 and 721) when the resin material 23 is injected. Thereby, the resin material 23 can be reliably spread in the molding die 7, and the base material 2 can be molded according to the mold.
The pressure in the mold 7 at the time of decompression (pressure in the space formed by the mold part 711 and the mold part 721) is not particularly limited, but is preferably 1 × 10 ¹ to 1 × 10 ⁴ Pa. By setting the pressure in the mold 7 to a value within the above range, the resin material 23 can be more reliably distributed in the mold 7 and the base material 2 having a desired shape can be more reliably molded. It becomes possible. On the other hand, when the degree of vacuum is less than the lower limit value, the resin material 23 may enter the space of the decompression pipe (discharge hole 712). On the other hand, when the degree of vacuum exceeds the upper limit, it is difficult to sufficiently spread the resin material 23 in the mold 7 and it is difficult to reliably mold the base material 2 having a desired shape.

[Solidification process]
Thereafter, the resin material 23 is solidified (including curing (polymerization)).
In the case where the resin material 23 is made of a thermoplastic resin, the resin material 23 is usually solidified by cooling (dissipating heat) the resin material 23 applied in the mold 7.
Moreover, when the resin material 23 is comprised with the thermoplastic resin, processing, such as a heating, is normally given before cooling.

After the resin material 23 filled in the molding die 7 is solidified, the molding die 7 is opened and taken out, thereby forming a molded product (base material 2 integrally formed with the index member 3) as shown in FIG. Is obtained. At this time, since the mold release process is performed on the inner side of the mold 7, mold release and removal of the molded product can be easily performed.
Then, you may perform processes, such as washing | cleaning and grinding | polishing, as needed.

[Film formation process]
Next, the coating 4 is formed on the second surface 22 of the molded product (base material 2 integrally formed with the index member 3) obtained as described above. Thereby, the timepiece dial 1 is obtained.
The method for forming the coating 4 is not particularly limited, and examples thereof include wet coating methods such as spin coating, dipping, brush coating, spray coating, electrostatic coating, electrodeposition coating, etc., electrolytic plating, immersion plating, and electroless plating. And chemical vapor deposition methods (CVD) such as thermal CVD, plasma CVD, and laser CVD, dry plating methods (vapor deposition methods) such as vacuum deposition, sputtering, and ion plating, and thermal spraying. (Vapor deposition method) is preferable. By applying a dry plating method (vapor phase film forming method) as a method for forming the coating film 4, the coating film 4 having a uniform film thickness, uniform, and particularly excellent adhesion to the substrate 2 can be reliably obtained. Can be formed. As a result, the aesthetic appearance and durability of the timepiece dial 1 finally obtained can be made particularly excellent. Further, by applying a dry plating method (vapor phase film forming method) as a method for forming the film 4, even if the film 4 to be formed is relatively thin, the variation in film thickness is made sufficiently small. be able to. Therefore, for example, the electromagnetic wave permeability of the timepiece dial 1 can be improved while the durability of the obtained timepiece dial 1 is sufficiently high. Therefore, the obtained timepiece dial 1 can be more suitably applied to a solar timepiece.

  Among the dry plating methods (vapor phase film forming methods) as described above, sputtering is particularly preferable. By applying sputtering as a method for forming the coating film 4, the above effects become more prominent. That is, by applying sputtering as a method for forming the coating film 4, it is possible to more reliably form the coating film 4 that has a uniform film thickness, is homogeneous, and has particularly excellent adhesion to the substrate 2. . As a result, the aesthetic appearance and durability of the finally obtained timepiece dial 1 can be further improved. Further, by applying sputtering as a method for forming the film 4, even if the film 4 to be formed is relatively thin, the variation in film thickness can be made particularly small. For this reason, for example, the light transmission of the timepiece dial 1 can be further improved while improving the durability of the timepiece dial 1 to be obtained. Therefore, the timepiece dial 1 obtained can be more suitably applied to a solar timepiece.

As described above, in the present embodiment, the coating 4 has the openings 41 provided at a predetermined ratio. The method for providing the opening 41 is not particularly limited, and examples thereof include etching, laser light irradiation, and blasting.
The opening 41 may be provided for the film once formed by the method as described above, or may be provided together with the formation (film formation) of the film 4.

As described above, the method for forming the opening 41 together with the formation (film formation) of the coating film 4 includes the following methods.
That is, vapor phase film formation is performed in a state where a mask provided with an opening in a pattern corresponding to the opening 41 to be formed (inverted pattern) is in close contact with the second surface 22 of the substrate 2. Thus, the opening 41 can be formed together with the formation (film formation) of the coating film 4. By forming the coating 4 having the opening 41 in this way, the light constant can be reduced, and the productivity of the timepiece dial 1 can be improved. In addition, it is possible to easily and reliably form the opening 41 of a shape and pattern (inverted pattern) corresponding to the opening of the mask to be used. Further, by repeatedly using the mask for manufacturing a plurality of timepiece dials 1, it is possible to suppress variations in quality among the individual timepiece dials 1 to be manufactured. For this reason, the quality stability of the timepiece dial 1 can be improved. Moreover, since it is not necessary to form an opening by a chemical method (chemical treatment) or a physical method (physical treatment), it is possible to suitably form the coating 4 without unintentional unevenness. In addition, by preparing a mask having openings of patterns (inverted patterns) corresponding to the openings 41 to be formed, the film having openings 41 of various patterns without greatly changing the film forming conditions. 4 can be formed. Thereby, it can respond suitably also to multi-product production of the timepiece dial.

  The mask may be composed of any material, and examples of the constituent material of the mask include various metal materials, various ceramic materials, various plastic materials, and the like. Among these, a metal material is preferable as the constituent material of the mask. When the mask is made of a metal material, the durability of the mask can be made particularly excellent. As a result, the productivity of the timepiece dial 1 can be made particularly excellent, and variations in quality among individuals can be suppressed when a large number of timepiece dials 1 are manufactured, The reliability of the timepiece dial 1 is improved. In addition, metal materials generally have moderate elasticity and many shape followability, and the base material 2 (watch dial 1 to be manufactured) is not limited to a flat plate, but is curved. Even a plate-like material can be suitably applied. In addition, one type of mask can be used in common for the base materials 2 having different shapes (for example, the flat base material 2 and the curved base material 2).

  Moreover, the following effects can be obtained by using a mask made of a material including a magnetic material (a material having paramagnetism and ferromagnetism). That is, at the time of vapor-phase film formation, by arranging a magnet on the surface opposite to the surface facing the mask of the base material 2, the base material 2 (base material) as a work on which the mask and the film 4 are to be formed. 2 and the index member 3) can be securely adhered to each other. As a result, it is possible to more reliably prevent the coating 4 from being formed on a portion other than the target on the base material 2, and the aesthetic appearance of the timepiece dial 1 finally obtained is surely excellent. It can be. That is, the reliability of the manufactured timepiece dial 1 can be made particularly excellent. In such a case, the magnet may be a permanent magnet or an electromagnet, for example.

Further, for example, when the index member 3 is made of a magnetic material (a material having paramagnetism or ferromagnetism), the surface opposite to the surface of the substrate 2 facing the mask is formed during vapor deposition. Even if a magnet is not provided on the surface side, the above effects can be obtained.
The mask may have a surface layer. Thereby, for example, the durability of the mask can be made particularly excellent, and the constituent material of the coating film 4 can be effectively prevented from firmly adhering to the mask during vapor phase film formation. . Examples of the material constituting such a surface layer include fluorine resins such as polytetrafluoroethylene (PTFE), silicone resins, diamond-like carbon (DLC), and the like.

  Moreover, when performing this process by the vapor-phase film-forming using a mask, vapor-phase film-forming is predetermined with respect to the normal direction of the main surface (main surface which should be coat | covered with the coating film 4) of the base material 2, for example. The vapor-phase film-forming particles (for example, sputtered particles in the case of sputtering) made of the constituent material of the coating 4 may be incident on the substrate 2 from the direction inclined by the angle θ. Thereby, the film 4 can be more uniformly formed in each part in the opening part of a mask more reliably. As a result, the film 4 having the openings 41 having a desired shape and pattern can be more reliably formed.

In such a case, the angle θ formed by the incident direction of the vapor-phase film-forming particles and the normal direction of the main surface of the substrate 2 is not particularly limited, but is preferably 1 to 50 °, and preferably 3 to 40 °. More preferably, it is 5-30 degrees. When the angle θ is a value within the above range, the coating 4 can be formed more reliably at each site in the opening of the mask.
Moreover, it is preferable that the vapor-phase film-forming particles are incident not only from one direction but also from a plurality of directions with respect to the substrate 2. Thereby, the coating 4 having a suitable shape can be easily and reliably formed, and the aesthetic appearance of the obtained timepiece dial 1 can be made particularly excellent. Further, it is possible to obtain the timepiece dial 1 as a material in which variations in texture when viewed from various directions are more effectively suppressed.

  As a method for injecting vapor-phase film-forming particles from a plurality of directions, for example, a plurality of vapor-phase film-formation sources (targets, vapor deposition sources, etc.), which are materials for vapor-phase film-formation, are prepared, A method of installing and generating vapor-phase film-forming particles simultaneously or sequentially from the plurality of vapor-phase film-formation sources can be mentioned. For example, the base material 2 and the gas-phase film-formation source are relatively moved (displaced). And a method of generating gas phase film formation particles from a gas phase film formation source. As a method of relatively moving (displacement) the base material 2 and the vapor deposition source, for example, a method of moving (displacement) the vapor deposition source while the base 2 is fixed, or a vapor deposition method. Examples thereof include a method of moving (displacement) the base material 2 in a state where the source is fixed, and a method of moving (displacement) the vapor phase film forming source and the base material 2 together. In particular, when the substrate 2 is moved (displaced), an effect is obtained that it is easy to use a conventional vapor deposition apparatus that fixes the vapor deposition source.

Hereinafter, the method of moving (displacement) the base material 2 will be described more specifically with reference to FIG.
In the configuration shown in FIG. 10, the base material 2 is made to stay on the shaft 50 so that the angle formed between the normal line of the main surface of the base material 2 and the longitudinal direction of the shaft 50 maintains a predetermined angle θ. It is configured to rotate. In other words, in the configuration shown in FIG. 10, the normal line of the main surface of the base material 2 at the portion where the extension line of the shaft 50 contacts the surface (incident surface) of the base material 2 is the circumference of the cone centered on the shaft 50. The base material 2 rotates so as to form a surface. With such a configuration, for example, while maintaining the state in which the normal line of the main surface of the substrate 2 is inclined by the angle θ with respect to the incident direction of the vapor-phase film-forming particles, The incident direction can be changed over time. Thereby, the coating 4 having a suitable shape can be easily and reliably formed, and the aesthetic appearance of the obtained timepiece dial 1 can be made particularly excellent. Further, it is possible to obtain the timepiece dial 1 as a material in which variations in texture when viewed from various directions are more effectively suppressed.

The value of the angle θ may change over time. Thus, when the value of the angle θ changes with time, it is preferable that the maximum value is included in the above-described range. Further, for example, there may be a time point when the angle θ becomes zero during vapor phase film formation.
As the angle θ, an angle formed by a straight line connecting the vapor deposition source and the base material on which the film is to be formed and the normal line of the base material can be employed.
When the coating 4 is formed by vapor phase film formation using the mask as described above, the target timepiece dial 1 can be obtained by removing the mask after film formation.

  In addition, when the timepiece dial 1 to be manufactured has an oxide layer composed of the metal oxide as described above between the base material 2 and the coating 4, the formation of the oxide layer is also possible. The film 4 can be formed by the same method as described above. In addition, the formation of the oxide layer may be performed in a state where a mask is disposed on the second surface 22 of the substrate 2 or may be performed in a state where no mask is disposed.

<Clock>
Next, the timepiece of the present invention provided with the timepiece dial 1 of the present invention as described above will be described.
The timepiece of the present invention has the timepiece dial 1 of the present invention as described above. As the parts other than the timepiece dial 1 (the timepiece dial 1 of the present invention) constituting the timepiece of the present invention, known parts can be used. An example will be described.

FIG. 11 is a cross-sectional view showing a preferred embodiment of the timepiece (watch) of the present invention.
As shown in FIG. 11, a wristwatch (portable watch) 100 according to this embodiment includes a trunk (case) 102, a back cover 103, a bezel (edge) 104, and a glass plate (cover glass) 105. . Further, in the case 102, the timepiece dial 1 of the present invention as described above, the solar cell 11, and the movement 101 are accommodated, and further, hands (pointers) not shown are accommodated. .
The glass plate 105 is usually made of transparent glass or sapphire having high transparency. Thereby, while being able to fully exhibit the aesthetic appearance of the timepiece dial 1 of the present invention, a sufficient amount of light can be incident on the solar cell 11.
The movement 101 uses the electromotive force of the solar cell 11 to drive the pointer.

Although omitted in FIG. 11, in the movement 101, for example, an electric double layer capacitor for storing the electromotive force of the solar cell 11, a lithium ion secondary battery, a crystal oscillator as a time reference source, and a crystal vibration A semiconductor integrated circuit that generates a driving pulse that drives the clock based on the oscillation frequency of the child, a step motor that drives the wheel train mechanism every second in response to this driving pulse, and a movement of the step motor A train wheel mechanism for transmitting to the vehicle is provided.
The movement 101 also includes a radio wave receiving antenna (not shown). And it has the function to perform time adjustment etc. using the received electromagnetic wave.

The solar cell 11 has a function of converting light energy into electric energy. The electric energy converted by the solar cell 11 is used for driving the movement.
In the solar cell 11, for example, a p-type impurity and an n-type impurity are selectively introduced into a non-single-crystal silicon thin film, and a p-type non-single-crystal silicon thin film and an n-type non-single-crystal silicon thin film are used. It has a pin structure provided with an i-type non-single-crystal silicon thin film with a low impurity concentration in between.

A winding stem pipe 106 is fitted and fixed to the barrel 102, and a shaft 1071 of a crown 107 is rotatably inserted into the winding stem pipe 106.
The body 102 and the bezel 104 are fixed by a plastic packing 108, and the bezel 104 and the glass plate 105 are fixed by a plastic packing 109.
Further, a back cover 103 is fitted (or screwed) to the body 102, and a ring-shaped rubber packing (back cover packing) 114 is inserted in a compressed state in these joint portions (seal portions) 115. Has been. With this configuration, the seal portion 115 is liquid-tightly sealed, and a waterproof function is obtained.

  A groove 1072 is formed on the outer periphery of the shaft 1071 of the crown 107, and a ring-shaped rubber packing (crown packing) 113 is fitted in the groove 1072. The rubber packing 113 is in close contact with the inner peripheral surface of the winding stem pipe 106 and is compressed between the inner peripheral surface and the inner surface of the groove 1072. With this configuration, the space between the crown 107 and the winding stem pipe 106 is liquid-tightly sealed, and a waterproof function is obtained. When the crown 107 is rotated, the rubber packing 113 rotates together with the shaft portion 1071 and slides in the circumferential direction while being in close contact with the inner peripheral surface of the winding stem pipe 106.

In the above description, a wristwatch (portable clock) is described as an example of a clock, but the present invention is similarly applied to other types of clocks such as a portable clock, a table clock, and a wall clock other than the wristwatch. be able to.
In the above description, a solar timepiece (in particular, a solar radio timepiece) is described as an example of a timepiece. However, the present invention can be similarly applied to a timepiece other than a solar timepiece.

As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to these.
For example, in the method for manufacturing a timepiece dial according to the present invention, an optional process can be added as necessary. For example, after the coating is formed, post-treatment such as polishing (lapping) may be performed. Moreover, you may provide a coating layer on the surface side which the parameter | index member on the base material exposed, or on a film. As a result, for example, the glossiness, color tone, etc. are adjusted, and the aesthetic appearance of the watch dial is further improved, or the watch dial as a whole is resistant to corrosion, weather, water, oil, and scratches. Various properties such as resistance, wear resistance, and discoloration resistance can be improved. Such a coat layer may be removed, for example, when a timepiece dial is used.

Moreover, the manufacturing method of this invention should just have an index member installation process as mentioned above, a resin material provision process, and a solidification process, for example, a mold release agent provision process, an adhesive provision process, etc. It may be omitted.
Moreover, in manufacturing the timepiece dial, the order of the steps described above may be changed. For example, in the above-described embodiment, the index member installation process is performed after the adhesive application process, but the adhesive application process may be performed after the index member installation process.

In addition, for example, when the timepiece dial has a plurality of indicators, in the present invention, at least one of the indicators may be formed integrally with the base material by the above method. What is necessary is just to have a printing part etc. which were formed by printing, for example.
In the above-described embodiment, the timepiece dial has been described as having a base material, an indicator member, and a coating. However, the timepiece dial of the present invention is limited to such a configuration. For example, it may not be provided with a coating. Further, the coating may not have an opening.

Next, specific examples of the present invention will be described.
1. Manufacture of a timepiece dial A timepiece dial was manufactured by the following method.
(Example 1)
First, by pressing a plate material made of Os, two types of indicator members (first indicator member, second indicator member having a substantially rod shape and a triangular cross section as shown in FIG. 3 are formed. Index member). The dimensions of the first index member were a width w of 0.3 mm, a length l of 5.0 mm, and a height h of 900 μm. The dimensions of the second indicator member were 0.5 mm in width w, 7.0 mm in length l, and 900 μm in height h.

Next, a fluorine-based mold release agent (fluorinated alkyl ester) was applied to a portion to be a display portion (a portion exposed from the base material in the timepiece dial) of the obtained index member.
Next, using a molding apparatus as shown in FIGS. 6 and 7, an integrally molded product of a base material made of polycarbonate and an index member was molded.
First, trimethyl phosphate was applied to the inside of the mold as a release agent. At this time, the inside of the mold was decompressed in advance by exhausting through an exhaust port (exhaust hole), and then the release agent was injected into the mold from the release agent supply port. Thereby, the release agent could be uniformly applied to the entire surface in the mold.

Next, a primer treatment with syndiotactic polystyrene was performed on a portion to be an embedded portion of the index member, and an epoxy-based adhesive was applied to the portion.
Next, an index member was installed in a recess provided in the lower mold part.
Next, the resin material (polycarbonate) which has fluidity | liquidity was provided to the shaping | molding die. Specifically, molten polycarbonate (melting point Tm: 220 ° C.) was poured from a gate into a mold and filled. The injection pressure (injection pressure) of the resin material at this time was 90 to 100 MPa, the temperature of the resin material was 270 ° C., and the temperature of the mold was 300 ° C.

Furthermore, by reducing the pressure in the mold to 1 × 10 ² Pa, the resin material could be reliably distributed in the mold.
Thereafter, the mold was cooled to 40 ° C., and the resin material filled in the mold was solidified. After the resin was cured, it was taken out to obtain an integrally molded product of the base material and the index member. At this time, since the release agent was applied to the surface of the mold, it was possible to easily remove and remove the substrate.

Thereafter, necessary portions were cut and polished. The obtained base material (integral molded product of the base material and the index member) was substantially disk-shaped and had a diameter: 27 mm × thickness: 0.5 mm. In the first index member, the height h ₂ of the display portion protruding from the substrate surface was 400 μm. In the second indicator member, the height h ₂ of the display portion protruding from the substrate surface was 400 μm.
Next, this base material was washed. As the cleaning of the substrate, first, alkali immersion degreasing was performed for 30 seconds, and then neutralization was performed for 10 seconds, water washing for 10 seconds, and pure water cleaning for 10 seconds.

Next, an oxide layer composed of TiO ₂ is formed on the surface (second surface) opposite to the surface (first surface) on the side where the index member (display portion) of the base material is exposed. The coating film to be formed was sequentially formed by sputtering as described below.
First, the cleaned substrate was mounted in a sputtering apparatus, and then the inside of the sputtering apparatus was evacuated (depressurized) to 3 × 10 ⁻³ Pa while preheating the apparatus.

Next, while introducing argon gas at an argon flow rate: 40 ml / min, oxygen was introduced at an oxygen flow rate: 10 ml / min. In such a state, by using Ti as a target and performing discharge under conditions of input power: 1400 W and processing time: 3.0 minutes, an oxide composed of TiO ₂ on the second surface of the substrate A layer was formed. The average thickness of the oxide layer thus formed was 0.01 μm.

Subsequently, a film composed of Ag was formed on the surface of the oxide layer formed as described above by sputtering.
The coating was formed by sputtering in a state where a mask provided with openings in a predetermined pattern (reversal pattern of openings of the coating to be formed) was placed on the surface of the oxide layer.
The mask was made of stainless steel (SUS444), and its thickness was 150 μm.
In addition, this step is performed in a state in which a magnet is disposed on the surface of the substrate opposite to the surface facing the mask, and the substrate on which the oxide layer is provided is in close contact with the mask. It was.

Sputtering in this step was performed under the following conditions.
First, the inside of the apparatus was evacuated (depressurized) to 3 × 10 ⁻³ Pa, and then argon gas was introduced at an argon gas flow rate of 35 ml / min. In this state, Ag was used as a target, and discharge was performed under the conditions of input power: 1400 W and treatment time: 2.0 minutes, thereby forming a film composed of Ag. At this time, as shown in FIG. 10, the base material is rotated on the shaft as much as possible so that the angle formed by the normal line of the main surface of the base material and the longitudinal direction of the shaft is maintained at 15 °. Thus, vapor-phase film-forming particles (sputtered) composed of the constituent material of the film from a direction inclined by 15 ° (angle θ) with respect to the normal direction of the main surface of the substrate (main surface to be coated with the film) Particles) were incident on the substrate. The average thickness of the film thus formed was 0.20 μm. In addition, the coating film formed in this way had openings having a shape and pattern as shown in FIG. Moreover, the width W of the opening part which a film has was 47 micrometers, and the pitch P of the opening part was 150 micrometers. Further, the ratio of the area occupied by the opening (the ratio of the occupied area of the opening) when the coating was viewed in plan was 30%.

Next, the base material provided with the oxide layer and the coating film was taken out from the sputtering apparatus, and the mask was removed (mask removal process). Thus, a timepiece dial as shown in FIGS. 1 and 2 was obtained.
In addition, the thickness of the oxide layer, the coating film, and the mask was measured according to a microscope cross-sectional test method defined in JIS H5821.

(Examples 2 to 7)
The structure of the indicator member used for the production of the timepiece dial and the structure of the mask are shown in the table, and the structure of the base material, oxide layer, and film is as shown in the table. A timepiece dial was manufactured in the same manner as in Example 1 except that the processing conditions (including changes in the materials used) were adjusted.

(Example 8)
A watch dial is manufactured in the same manner as in Example 7 except that the base material is fixed so that the perpendicular direction of the main surface of the base material and the traveling direction of the sputtered particles are substantially parallel in the film forming step. did.
Example 9
A timepiece dial was manufactured in the same manner as in Example 8 except that the mask was not used in the film forming step.

(Comparative Example 1)
First, two types of planting materials (a first planting material, a display unit to be placed on a base material, and a foot for mounting by pressing a plate material made of Os. A second planting material) was produced. About the 1st planting material, the width | variety (length corresponding to w in FIG. 3) of a display part is 1.5 mm, length (length corresponding to 1 in FIG. 3) is 5.0 mm, and high. The thickness was 570 μm. Moreover, about the 1st planting material, the length of the foot part was 500 micrometers and the diameter (thickness) of the foot part was 500 micrometers. Moreover, about the 2nd planting material, the width | variety (length corresponding to w in FIG. 3) of a display part is 2.0 mm, and length (length corresponding to 1 in FIG. 3) is 7.0 mm. The height was 570 μm. Moreover, about the 2nd planting material, the length of the foot part was 500 micrometers and the diameter (thickness) of the foot part was 700 micrometers.

Moreover, the disk-shaped base material of diameter: 27mm * thickness: 0.5mm was produced by compression molding using the polycarbonate. Moreover, a hole (diameter 500 μm) for attaching the planting material was formed in a predetermined part of the base material.
Insert the foot of the planting material into the hole formed in the base material, and apply the epoxy adhesive from the side opposite to the surface where the planting material is inserted, to make the planting material into the base material Fixed to.
Thereafter, in the same manner as in Example 9, an oxide layer and a film were formed on the surface opposite to the surface on which the planting material was fixed to obtain a timepiece dial.

(Comparative Example 2)
A timepiece dial was manufactured in the same manner as in Comparative Example 1 except that the width of the planting material and the diameter (thickness) of the foot were shown in the table.
(Comparative Example 3)
First, a disk-shaped substrate having a diameter of 27 mm × thickness: 0.5 mm was prepared by compression molding using polycarbonate.
Next, this base material was washed. As the cleaning of the substrate, first, alkali immersion degreasing was performed for 30 seconds, and then neutralization was performed for 10 seconds, water washing for 10 seconds, and pure water cleaning for 10 seconds.
By performing printing (octopus printing) on the surface of the substrate thus cleaned, an index was formed at a site corresponding to the site where the index (index member) was provided in Example 1. For forming the index, an ink (dispersion) containing Ag fine particles, an acrylic resin, and methyl ethyl ketone was used. The thickness (height) of the formed index was 40 μm. The index was formed so that the shape when viewed in plan was the same as the index (display unit) formed in Example 1.
Thereafter, an oxide layer and a film were formed on the surface opposite to the surface on which the index (printing part) of the base material was provided in the same manner as in Example 9 to obtain a timepiece dial.

(Comparative Example 4)
By repeating the printing, a timepiece dial was manufactured in the same manner as in Comparative Example 3 except that the thickness (height) of the index was 120 μm.
Tables 1 and 2 collectively show the manufacturing conditions of the timepiece dial of each example and each comparative example, the configuration of the timepiece dial, and the like. In the table, polycarbonate is represented by PC, acrylonitrile-butadiene-styrene copolymer (ABS resin) is represented by ABS, polyethylene terephthalate is represented by PET, and acrylic resin is represented by PMMA. Also, in the table, among the index members (planting material for Comparative Examples 1 and 2, and printed part for Comparative Examples 3 and 4), the part (embedded part embedded in the base material. For each Comparative Example The height of the foot part is shown as h ₁ [μm], and the height of the part functioning as the display part is shown as h ₂ [μm]. Moreover, about the comparative examples 1 and 2 in the table | surface, the conditions of the planting material were shown in the column of an index member, and the conditions of the foot | leg part were shown in the column regarding an embedding part. Moreover, about the comparative examples 1 and 2, the width | variety of the foot | leg part was shown in the parenthesis in the column of the width | variety w with the width | variety of the display part. In the table, for Comparative Examples 3 and 4, the condition of the printing part formed by printing is shown in the column of the index member.

2. 2. Appearance evaluation of timepiece dial 2-1. Stereoscopic evaluation Each watch dial plate manufactured in each of the above examples and comparative examples was visually observed, and these stereoscopic effects were evaluated according to the following five-stage criteria.
A: Extremely excellent.
A: Excellent.
○: Good.
Δ: Slightly poor
X: Defect.

2-2. Comprehensive Appearance Evaluation Each watch dial plate manufactured in each of the above Examples and Comparative Examples was visually and observed with a microscope, and the appearance was evaluated according to the following five criteria.
A: Extremely excellent.
A: Excellent.
○: Good.
Δ: Slightly poor
X: Defect.

3. Durability Evaluation Each timepiece dial manufactured in each of the above examples and comparative examples was subjected to the following three types of tests to evaluate the durability of the timepiece dial.
3-1. Evaluation by drop test For each timepiece dial manufactured in each of the above Examples and Comparative Examples, for a timepiece after being repeatedly dropped 50 times onto a block made of stainless steel and having a thickness of 10 cm from a height of 3 m. The appearance of the dial was visually observed, and the appearance was evaluated according to the following four criteria.
A: No damage (distortion, floating, cracking, peeling, etc.) of the index is observed at all.
○: Index damage (distortion, floating, cracking, peeling, etc.) is hardly observed.
(Triangle | delta): The damage (a distortion, a float, a crack, peeling, etc.) of a parameter | index is recognized slightly.
X: Index damage (distortion, floating, cracking, peeling, etc.) is noticeable.

3-2. Evaluation by Bending Test For each timepiece dial manufactured in each of the above Examples and each Comparative Example, after being bent at 30 ° with respect to the center of the timepiece dial using a 4 mm diameter iron bar as a fulcrum The appearance of the timepiece dial was visually observed, and the appearance was evaluated according to the following four-stage criteria. Bending was performed in both compression / tension directions.
A: No indicators (indicator member, planting material, paint), coating float, peeling, etc. are observed at all.
○: Almost no indicator (indicator member, planting material, paint), float or peeling of the film is observed.
Δ: Indices (indicator member, planting material, paint), coating float, peeling, etc. are slightly observed.
X: Index (index material, planting material, paint), cracking and peeling of coating are clearly recognized.

3-3. Evaluation by Thermal Cycle Test Each timepiece dial produced in each of the above Examples and Comparative Examples was subjected to the following thermal cycle test.
First, the watch dial is placed in a 20 ° C. environment for 1.5 hours, then in a 60 ° C. environment for 2 hours, then in a 20 ° C. environment for 1.5 hours, and then in a −20 ° C. environment. It was left to stand for 3 hours. Thereafter, the environmental temperature was returned again to 20 ° C., which was set as one cycle (8 hours), and this cycle was repeated three times in total (24 hours in total).

Thereafter, the appearance of the timepiece dial was visually observed, and the appearance was evaluated according to the following four-stage criteria.
A: No indicators (indicator member, planting material, paint), coating float, peeling, etc. are observed at all.
○: Almost no indicator (indicator member, planting material, paint), float or peeling of the film is observed.
Δ: Indices (indicator member, planting material, paint), coating float, peeling, etc. are slightly observed.
X: Index (index material, planting material, paint), cracking and peeling of coating are clearly recognized.

4). Evaluation of light transmittance of timepiece dial The light transmittance of each timepiece dial manufactured in each of the above Examples and Comparative Examples was evaluated by the following method.
First, the solar cell and each dial were placed in a dark room. Thereafter, light from a fluorescent lamp (light source) separated by a predetermined distance was made incident on the light receiving surface of the solar cell alone. At this time, the power generation current of the solar cell was A [mA]. Next, light from a fluorescent lamp (light source) spaced a predetermined distance was made incident in the same manner as described above in a state where the dial plate was superimposed on the upper surface of the light receiving surface of the solar cell. In this state, the generated current of the solar cell was B [mA]. Then, the light transmittance of the timepiece dial represented by (B / A) × 100 was calculated and evaluated according to the following four criteria. It can be said that the larger the light transmittance of the timepiece dial, the better the light transmittance of the timepiece dial.
A: 32% or more.
○: 25% or more and less than 32%.
Δ: 17% or more and less than 25%.
X: Less than 17%.

  Thereafter, a watch as shown in FIG. 11 was manufactured using the timepiece dial manufactured in each of the above examples and comparative examples. Then, each manufactured wristwatch was put in a dark room. Thereafter, light from a fluorescent lamp (light source) spaced a predetermined distance was made incident from a surface on the dial side (surface on the glass plate) of the watch. At this time, the irradiation intensity was changed at a constant speed so that the irradiation intensity of light gradually increased. As a result, in the timepiece of the present invention, the movement was driven even when the irradiation intensity was relatively small.

5. Evaluation of radio wave permeability The radio wave permeability of each timepiece dial manufactured in each of the above Examples and Comparative Examples was evaluated by the following method.
First, a watch case and a wristwatch internal module (movement) equipped with an antenna for receiving radio waves were prepared.
Next, a watch internal module (movement) and a watch dial were assembled in the watch case, and the radio wave reception sensitivity in this state was measured.

Using the reception sensitivity in a state where the timepiece dial is not incorporated as a reference, the reduction amount (dB) of the reception sensitivity when the dial is incorporated was evaluated according to the following four criteria. It can be said that the lower the radio wave reception sensitivity is, the better the radio wave transmission of the dial is.
A: No decrease in sensitivity is observed (below the detection limit).
○: A decrease in sensitivity is observed at less than 0.7 dB.
(Triangle | delta): The fall of a sensitivity is 0.7 dB or more and less than 1.0 dB.
X: The reduction in sensitivity is 1.0 dB or more.
These results are shown in Table 3.

As is clear from Table 3, each of the timepiece dials of the present invention had an excellent aesthetic appearance with a three-dimensional effect and was excellent in durability. Further, the timepiece dial having a coating provided with an opening has excellent electromagnetic wave permeability.
On the other hand, in the comparative example, a satisfactory result was not obtained. That is, in Comparative Examples 1 and 2 in which the index was formed using the planting material, the adhesion of the index was inferior and the durability was not sufficient. Moreover, the timepiece dial of Comparative Example 2 in which the height of the planting material was increased for the purpose of improving the three-dimensional effect was particularly low in durability. Further, in Comparative Example 2 in which the width of the indicator display portion was narrowed for the purpose of improving durability, the foot portion was clearly visually recognized, and its aesthetic appearance was extremely inferior. Further, in Comparative Examples 3 and 4 in which the index was formed by printing, the three-dimensional effect could not be sufficiently clear. Further, in Comparative Example 4 in which printing was repeatedly performed for the purpose of improving the three-dimensional effect, a part of the ink superimposed on the printing layer flowed down to the surface of the base material, resulting in a so-called sagging state and formed. The indicator was unclear.
Further, a timepiece as shown in FIG. 11 was assembled using the timepiece dials obtained in each Example and each Comparative Example. Each timepiece thus obtained was tested and evaluated in the same manner as described above, and the same results as described above were obtained.

It is a top view which shows suitable embodiment of the timepiece dial of this invention. It is sectional drawing of the timepiece dial shown in FIG. It is a perspective view which shows an example of the parameter | index member used in the timepiece dial shown in FIG. It is a typical top view for explaining an example of the shape (pattern) of the opening which a coat has. It is a typical top view for explaining other examples of the shape (pattern) of the opening which a coat has. It is sectional drawing which shows an example of the shaping | molding apparatus used for manufacture of the timepiece dial of this invention, and is a figure which shows the state which closed the shaping | molding die. FIG. 7 is a cross-sectional view showing a state in which the forming die is closed in the forming apparatus shown in FIG. 6. It is a top view which shows typically the flow of the resin material inject | poured in the shaping | molding die. It is sectional drawing which shows the molded article (base material integrally molded with the index member) manufactured using the shaping | molding apparatus shown in FIG. 6, FIG. It is a figure for demonstrating the advancing direction of the gaseous-phase film-forming particle | grains at the time of forming a film. It is a fragmentary sectional view which shows suitable embodiment of the timepiece (portable timepiece) of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Timepiece dial 2 ... Base material (board | substrate) 21 ... 1st surface 22 ... 2nd surface 23 ... Resin material 3 ... Indicator member 31 ... Buried part 32 ... Display part 33 ... Recessed part 4 ... Film 41 ... Opening Part 50 ... Shaft 6 ... Molding device 7 ... Mold 71 ... Upper mold 711 ... Mold part 712 ... Discharge hole 72 ... Lower mold 721 ... Mold part 722 ... Recess 8 ... Box 81 ... Lid 811 ... Seal member 82 ... Frame 821 ... Discharge pipe 822 ... Piping 823 ... Valve 824 ... Vacuum pump 83 ... Hollow part 9 ... Resin supply means 91 ... Runner 92 ... Gate 93 ... Piping 94 ... Resin material supply device 11 ... Solar cell 101 ... Movement 102 ... Body (case) 103 ... Back cover 104 ... Bezel (edge) 105 ... Glass plate (cover glass) 106 ... Winding pipe 107 ... Crown 1071 ... Shaft part 1072 ... 108 ... plastic packing 109 ... plastic packing 113 ... rubber gasket (crown gasket) 114 ... rubber gasket (back cover gasket) 115 ... joint (sealing portion) 100 ... Watch (portable timepiece)

Claims (9)

A method for manufacturing a timepiece dial in which a part of an indicator member is embedded in a plastic base material,
An indicator member installation step of installing the indicator member in a predetermined part of the mold; and
A resin material application step of applying a resin material having fluidity to the mold in which the indicator member is installed;
A method for manufacturing a timepiece dial, comprising: a solidifying step for solidifying the resin material.   The timepiece dial manufacturing method according to claim 1, wherein the indicator member has a concave portion or a convex portion in a portion embedded in the base material.   The timepiece dial manufacturing method according to claim 1 or 2, wherein an adhesive is applied to at least a part of a portion of the indicator member to be embedded in the base material prior to the resin material application step.   The timepiece dial manufacturing method according to any one of claims 1 to 3, wherein the indicator member is obtained by performing release processing on at least a part of a portion that should not be embedded in the base material.   5. The timepiece dial manufacturing method according to claim 1, wherein the molding die is subjected to a mold release treatment on at least a part of a portion in contact with the resin material. 6.   The timepiece dial manufacturing method according to claim 1, wherein, in the resin material application step, the inside of the mold is decompressed.   A timepiece dial manufactured using the method according to claim 1.   The timepiece dial according to claim 7, wherein the timepiece dial is a wristwatch dial.   A timepiece comprising the timepiece dial according to claim 7.

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