JPH06218760A - Insert molded product of/surface-treated member and production thereof - Google Patents

Abstract

PURPOSE:To enhance the adhesion of a treated surface and a resin surface at the time of the insert molding of a resin using a plastic sheet to which surface treatment such as printing is applied. CONSTITUTION:A character or pattern is printed on the surface of a plastic sheet 10 by dot printing treatment 21. This sheet 10 is mounted on an injection molding machine to inject a resin and a resin layer 42 is closely bonded and formed on the surface subjected to printing treatment 21 to obtain an insert molded product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert-molded article in which a resin layer is formed by insert molding on the surface of a member such as a plastic sheet having a surface subjected to a printing treatment, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, an insert molded article 1 such as a plastic sheet having a surface subjected to a printing treatment is manufactured as follows. First, as shown in the cross-sectional view of FIG. 3 (a), a printing process 20 is performed on the surface of the plastic sheet 10, and the plastic sheet 10 is mounted on the injection molding die 30 shown in FIG. The resin 40 melted in is injected and cooled and hardened to form a resin layer 42 in close contact with the surface of the printing process 20 as shown in FIG. That is, the printing process 20 is performed between the plastic sheet 10 and the resin layer 42.
Is formed.

The insert-molded article 1 manufactured in this manner is used in various places, for example, as shown in FIG.
As shown in, it is also used as a warning display or the like of the in-vehicle instrument 50. The instrument 50 is configured to be mounted on an instrument panel surface of a vehicle. In the figure, 51 is a case, 52 is an internal unit, 53 is a dial, and 54 is a pointer. The internal unit 52 operates based on a detection signal from a sensor arranged at a predetermined position of the vehicle,
The pointer 54 is rotated to a position such as a character scale of the dial plate 53 corresponding to the detection signal. Reference numeral 55 denotes a front cover, which serves to prevent dust and the like from entering the inside of the instrument 50 and to prevent contact of a hand or an object with the display surface of the instrument 50.

The insert-molded product 1 is attached to the lower end of the instrument 50 as a warning display, and when an abnormality occurs in the vehicle and the lamp 57 lights up, the insert-molded product 1 is illuminated and printed. Predetermined information is displayed according to the difference in luminance from the non-displayed portion. Reference numeral 56 is a lens. Normally, since a plurality of warning displays are arranged in parallel (perpendicular to the paper surface in the figure), a plurality of lamps 57 and lenses 56 are also used in order to improve the visibility and distinctiveness of each warning display. The lens 56 is colored in various colors.

[0005]

However, in the insert-molded article as described above, the printing 20 of the character pattern or the like on the plastic sheet 10 is solid printing, so that it is shown in the perspective view of FIG. 3 (b). As described above, the surface of the print 20 is a flat surface, the adhesiveness with the resin layer 42 is poor, and there are cases where the print 20 is peeled off by various stresses such as heat and mechanical.

According to the present invention, when a plastic sheet subjected to surface treatment such as printing is used for insert molding with resin,
The purpose is to improve the adhesion between the treated surface and the resin surface.

[0007]

According to the present invention, a surface of a member is subjected to a printing process such as a character pattern, the member is mounted on an injection molding die, and a resin melted on the printed surface is injected and cured. In an insert-molded article of a member that has been subjected to a surface treatment in which a resin layer is formed in close contact with the print processing surface, the print processing surface of the member is formed by a surface having a large number of irregularities.

Further, according to the present invention, the surface of the member is subjected to a printing process such as a character pattern, the member is mounted on an injection molding die, and the resin melted on the printed surface is injected and cured to cure the printed surface. In the method for producing an insert-molded article of a member that has been subjected to a surface treatment for closely forming a resin layer on the surface of the member, when the printing treatment is applied to the surface of the member, the printing surface is formed to have a large number of irregularities. I am trying.

Furthermore, in the insert-molded article of the member subjected to the surface treatment and the method for producing the same according to the present invention, the unevenness of the printing surface is constituted by the concave portion and the convex portion by the printing portion, In addition, it is characterized in that its roughness is set to such an extent that the surface of the member on the back side of the printed surface can be hidden.

[0010]

With the above-mentioned structure, the resin injected during insert molding enters the irregularities of the printing surface of the member surface, improving the adhesion between the processing surface and the resin surface, and There is no fear of peeling due to stress. In particular, when the concave portion of the printing surface is a non-printing portion, the resin directly melts on the surface of the printed member, so that the adhesion is further enhanced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In addition, the same or corresponding parts as those described in the related art will be denoted by the same reference numerals.

FIG. 1 is a sectional view showing an insert-molded product 1 of a member which has been subjected to a surface treatment as an embodiment of the present invention. As shown in the drawing, characters or patterns formed by the dot printing process 21 are printed on the surface of the plastic sheet (member) 10, and the resin layer 42 is formed in close contact with the surface of the printing process 21. As shown in the figure, the character pattern or the like subjected to the printing process 21 is not formed by solid printing as in the past, but is formed by dot-like unevenness, and the concave portion is a non-printing portion and the convex portion is a printing portion. .

Next, a method of manufacturing the insert molded product 1 will be described. First, dot printing 21 as shown in the perspective view of FIG. 2 is applied to the heat resistant plastic sheet 10. This figure is an enlargement of the printed portion. The roughness of the dot printing process 21 is performed to such an extent that the surface of the back side member of this printing process surface can be concealed, and it is visually recognized from the normal distance that solid printing does not change. It is a thing.

Next, the printed plastic sheet 10 is subjected to the same process as shown in FIG.
Mounted on the injection molding die 30 shown in FIG.
The resin 40 melted on one surface is injected and cooled and hardened.
As shown in, the resin layer 42 is formed in close contact with the surface of the dot printing process 21. That is, the surface of the print processing 21 is formed between the plastic sheet 10 and the resin layer 42.

In the insert-molded article manufactured in this way, the injected resin entered the irregularities of the surface of the plastic 10 on which the printing process was carried out, and entered the recesses which were the non-printing parts of the printing process surface. Since the resin melts directly on the surface of the plastic sheet, the adhesion between the surface 21 of the treatment 21 and the surface of the resin layer 42 is enhanced, and the peeling between the surface of the resin layer 42 and the printing treatment 21 due to temperature and various mechanical stresses is prevented. You can In the above-mentioned embodiment, the printing process of the character pattern or the like is performed by dots. However, other methods such as stripes, meshes, checkerboards, or lattices have unevenness on the printing process surface, resulting in poor adhesion of the resin layer. Any printing process can be used as long as the printing process is enhanced.

[0016]

As described above, according to the present invention,
The resin injected at the time of insert molding enters into the unevenness of the print processing surface of the member surface, so the adhesion between the processing surface and the resin surface is improved, and peeling can be prevented against various stresses.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an insert-molded product of a surface-treated member according to the present invention.

FIG. 2 is a perspective view of a plastic sheet that has been subjected to a dot printing process.

3A is a cross-sectional view of a plastic sheet printed by a conventional method, and FIG. 3B is a perspective view thereof.

FIG. 4 is a diagram illustrating a method for manufacturing an insert-molded product using a plastic sheet having a surface printed.

FIG. 5 is a cross-sectional view of a conventional insert-molded product made of a plastic sheet that has been printed on its surface.

FIG. 6 is a diagram applied to a warning display for a vehicle as an application example of an insert molded product.

[Explanation of symbols]

 1 Insert Molded Product 10 Plastic Sheet (Member) 20 Printing Process 21 Dot Printing Process 30 Injection Mold 42 Resin Layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuyuki Watanabe 1-7-1 Yokoi Keiki, Shimada City, Shizuoka Prefecture In-company (72) Inventor Kiyofumi Uchida 1-7-1 Yokoi, Shimada City, Shizuoka Yazaki Keiki Co., Ltd. Inside the company

Claims (3)

[Claims] 1. A surface of a member is subjected to a printing process such as a character pattern, the member is mounted on an injection molding die, and the resin melted on the printing surface is injected and cured to form a resin layer on the printing surface. An insert-molded article of a surface-treated member that is formed in close contact, wherein the print-treated surface of the member is formed by a surface having a large number of irregularities, and the surface-treated member is insert-molded. 2. The surface of the member is subjected to a printing process such as a character pattern, the member is mounted on an injection molding die, and the resin melted on the printed surface is injected and cured to form a resin layer on the printed surface. In the method for producing an insert-molded article of a surface-treated member for forming a close contact, when a printing process is performed on the surface of the member, the surface to be printed is formed into a surface having a large number of irregularities. A method for manufacturing an insert-molded product of a member subjected to. 3. The concavo-convex pattern on the print processing surface is characterized in that a concave portion is formed by a non-printing portion and a convex portion is formed by a printing portion, and the roughness thereof is set within a range in which a surface of a back side member of the print processing surface can be hidden. An insert-molded article of a member subjected to the surface treatment according to claim 1 or a method for producing the same.