JP2005205313A - Flow coater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To coat a relatively large sized material (w) to be coated with a coating material flow-out head 2 maintained compact. <P>SOLUTION: In the flow coater provided with a coating material supply port member 7 in a trough like coating material retaining body part 5 and operated by overflowing a coating material liquid (t) supplied at a fixed flow rate from one sidewall upper end (b1) of the body part 5 in the longitudinal direction in a curtain like form and passing the material (w) to be coated below the body part 5, a trough like auxiliary coating material retaining part 6 having a relatively small volume is separately arranged within the range of the trough length of the coating material retaining body part 5. The coating material supply member 7 is internally mounted in the auxiliary coating material retaining part 6. The coating material liquid (t) is previously discharged into the auxiliary coating material retaining part 6 from the coating material supply port member 7 and is overflown from the one side wall surface 3 of the auxiliary coating material retaining part 6 in the longitudinal direction to be indirectly supplied to the coating material retaining main body part 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flow coater in which a coating material is dropped on a plate-like body or the like as an object to be coated and adhered to the surface thereof.

  A paint reservoir main body part that allows a paint liquid supplied at a specific flow rate from the outside to flow into the paint reservoir main body part in the form of a curtain from the paint outflow portion of the paint reservoir main body part, and a lower part of the paint reservoir main body part. There is a flow coater provided with a conveyor that horizontally moves a coated object in the front-rear direction (see Patent Document 1).

  In the flow coater, while the conveyor is moving the object to be coated horizontally, the object to be coated passes through the paint liquid (curtain-like falling paint liquid) flowing out from the head in the form of a curtain. Sometimes the upper surface or the like is coated with a coating liquid flowing down from the main body of the paint reservoir.

  The horizontal width of the curtain-like falling coating liquid must correspond to the size of the object to be coated. When the object of the object to be painted is a door of a kitchen storage shelf, etc. Until recently, about 1200 mm was sufficient for the width of the falling coating liquid in the left-right direction. However, since the doors are now becoming larger, it is required that the horizontal width of the curtain-like falling coating liquid be about 1600 mm or more.

Japanese Patent No. 3226432

In the conventional flow coater described above, when the width of the curtain-like falling coating liquid exceeds a specific length determined by the surrounding environment, the curtain-like falling coating liquid has a thickness in the horizontal direction. It is difficult to make it the same stably at all positions, and as the width of the falling coating liquid increases in the left-right direction, the thickness easily changes.
Curtain-like falling coating liquid whose thickness varies in the front-rear direction is difficult to adhere to the surface of the object to be coated with a uniform thickness and causes uneven stripes due to the paint on the surface of the object to be coated. As a result, the quality of the product is degraded.

  The present invention is intended to rationally solve such a problem, that is, without increasing the cross-sectional shape of the paint reservoir main body in the front-rear direction, the arbitrary position in the left-right direction at a specific height can be obtained. It is an object of the present invention to provide a flow coater capable of relatively increasing the width in the left-right direction of a curtain-like falling coating liquid in which the thickness in the front-rear direction and the flowing-down speed are stably the same.

  In order to achieve the above object, according to a first aspect of the present invention, a paint supply port member is provided in a bowl-shaped paint reservoir main body, and a paint liquid supplied at a specific flow rate is supplied to the paint reservoir. In a flow coater that is made to overflow in the form of a curtain from the upper edge of one side wall in the length direction of the main body, and to pass the object to be coated in the lower part, within the bowl-shaped length range in the paint reservoir main body An auxiliary paint reservoir having a relatively small volume is arranged separately, and a paint supply port member is provided in the auxiliary paint reservoir, and paint liquid is discharged from the paint supply port member into the auxiliary paint reservoir in advance. In addition, the coating liquid is overflowed from one wall surface in the lengthwise direction of the auxiliary paint reservoir and is indirectly supplied into the paint reservoir main body.

Specifically, the above invention is preferably made as follows.
That is, as described in claim 2, the position where the paint liquid supplied into the auxiliary paint reservoir overflows into the paint reservoir main body and the overflow of the paint liquid within the paint reservoir main body conflicts with each other. And the structure.

  According to a third aspect of the present invention, the paint reservoir is configured to have approximately the same shape and the same dimensions as the paint reservoir main body.

According to a fourth aspect of the present invention, the slit opening of the paint supply port member for supplying the paint liquid into the auxiliary paint reservoir is arranged in a direction opposite to the side where the paint liquid in the auxiliary paint reservoir overflows into the paint reservoir main body. Position.
Further, as described in claim 5, the length of the bowl-shaped paint reservoir main body in the left-right direction is about 1600 mm or more.

According to the above-described present invention, the following effects can be obtained.
That is, according to the first aspect of the present invention, after the flow disturbance of the coating liquid supplied and retained from the paint supply port member to the inside of the auxiliary paint reservoir is attenuated in the auxiliary paint reservoir, the paint in the auxiliary paint reservoir is The liquid can be supplied to the inside of the paint reservoir main body in a state in which it is unlikely to be disturbed. Therefore, when the paint liquid staying in the paint reservoir main body flows out from the upper edge of one side wall in the longitudinal direction, It is possible to prevent the coating liquid from being disturbed by flow, and even if the paint reservoir main body is maintained in the same cross-sectional shape in the width direction as before, it flows out from the upper edge of one side wall in the length direction. Even when the horizontal width of the curtain-like falling coating liquid formed is increased to about 35% or more than before, the thickness of the curtain-like falling coating liquid at an arbitrary position in the left-right direction is reduced. And stable flow rate It is possible to maintain to be identical. As a result, even an object to be coated having a size that could not be painted in the past can be painted without increasing the cross-sectional shape in the width direction of the paint reservoir body.

  An auxiliary paint reservoir is also provided when the curtain-like falling paint liquid does not stably have the same thickness and the same flow velocity at an arbitrary position in the width direction in a state where no auxiliary paint reservoir is provided. Thus, the curtain-like falling coating liquid can be made into such a thing, and the coating quality can be improved.

  According to the second aspect of the present invention, the distance between the location where the paint liquid supplied into the auxiliary paint reservoir portion overflows into the paint reservoir body portion and the overflow location of the paint fluid within the paint reservoir body portion increases. When the coating liquid supplied into the auxiliary paint reservoir overflows into the paint reservoir main body, the influence of the flow turbulence is difficult to reach the overflow location of the paint liquid in the paint reservoir main body. The liquid can be stably and effectively made to have the same thickness and the same flow velocity at arbitrary positions in the width direction.

According to the third aspect of the invention, the effects of the first and second aspects can be effectively obtained with a compact structure.
According to the fourth aspect of the present invention, when the coating liquid flows out into the auxiliary paint reservoir through the slit opening, the influence of the flow disturbance is up to the point where the paint liquid in the auxiliary paint reservoir overflows into the paint reservoir main body. Thus, the curtain-like falling coating liquid can be stably and effectively made to have the same thickness and the same flow velocity at arbitrary positions in the width direction.

  According to the fifth aspect of the present invention, since the length of the bowl-shaped paint reservoir main body is about 1600 mm or more, the width of the curtain-like falling coating liquid is about 1600 mm or more. Even with a relatively large door on the storage shelf, high-quality painting can be performed without any problem.

  Next, a flow coater according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 is a side view of the flow coater, FIG. 2 is a partial side view of the flow coater, FIG. 3 is an explanatory plan view of the flow coater, and FIG. 4 is a partial perspective view of the flow coater.

  As shown in these figures, the flow coater of the present invention is a conveyor 1 configured to convey an object to be coated w in the horizontal front-rear direction f, and is disposed on the upper side of the conveyer 1 so that the coating liquid t flows out in a curtain shape. In addition to the paint spill head 2 that has been made, a far-infrared irradiation device 3 and an ultraviolet irradiation device 4 are provided in a front-rear arrangement on the front f1 side of the head 2 and above the conveyor 1. .

The details of the paint outflow head 2 are as follows.
That is, as shown in FIGS. 2 and 3, the paint reservoir main body 5 supported horizontally in the left-right direction f02 via a support member (not shown), and the length direction of the paint reservoir main body 5 inward of the paint reservoir main body 5 (Left-right direction) A relatively small auxiliary paint reservoir 6 arranged horizontally in f02, and a paint supply port member 7 arranged horizontally in the left-right direction f02 inside the auxiliary paint reservoir 6 have.

  The paint reservoir body 5 forms a paint reservoir space a1 surrounded by the inclined front wall 5b, the inclined rear wall 5a, and the left and right side walls 5c, 5d, and the upper edge b1 of the inclined front wall 5b. The hanging guide surface portion 5e is extended vertically downward. At this time, the upper edge b1 of the inclined rear wall portion 5a has a horizontal straight shape in the left-right direction f02 and is lower than the upper edge b2 of the inclined front wall portion 5b, and the paint liquid that has flowed into the paint reservoir space a1. It is a paint outflow point that acts as a weir when t overflows to the outside of the rear f2.

  The auxiliary paint reservoir portion 6 is shifted toward the inner rear f2 side of the paint reservoir main body portion 5 so that the auxiliary paint reservoir portion 6 is positioned, and the inclined rear wall portion 6a, the inclined front wall portion 6b and the left and right sides are arranged. A paint reservoir space a2 that is surrounded by the side wall portions 6c and 6d and has a length f02 that is substantially the same as the paint reservoir space a1 and that is smaller in width in the front-rear direction than the paint reservoir body 5. Has been made. At this time, the upper edge b3 of the inclined front wall portion 6b is formed in a horizontal straight shape in the left-right direction f02 so as to be lower than the upper edge b4 of the inclined rear surface wall portion 6a and the inclined front wall portion 5b of the paint reservoir main body portion 5 is formed. It is made lower than the upper edge b2, and it becomes a paint supply location that acts as a weir when the paint liquid t flowing into the auxiliary paint reservoir space a2 overflows to the outside of the front f1 and is supplied into the paint reservoir main body 6. .

  The paint supply port member 7 is composed of a straight tube member 7a disposed in the left-right direction f02 in the paint reservoir space a2 of the auxiliary paint reservoir main body 5, and the length of the left-right direction f02 is set to the left and right of the paint reservoir space a2. The slit port 7b, which is substantially the same as the length in the direction f02, is formed in a specific portion of the peripheral wall surface portion 7a in the left-right direction f02, and the coating liquid t supplied to the inside of the pipe member 7a from the supply line 8a Through the paint reservoir space a2 and flows out at the same flow rate as much as possible at an arbitrary position in the left-right direction f02.

  The conveyor 1 is configured as follows: an upstream conveyor 1a disposed on the lower rear f2 side of the paint outflow head 2 and a lower front f1 side of the paint outflow head 2. And a downstream conveyor 1b, and the upper surfaces of the respective conveyor belts 9 of the upstream conveyor 1a and the downstream conveyor 1b are made horizontal, and the transfer start end p1 on the conveyor belt 9 of the upstream conveyor 1a is coated. When the object w is placed, the article w to be coated is horizontally conveyed to the front f1 by the conveying operation of the upstream conveyor 1a and the downstream conveyor 1b, and finally reaches the conveyance terminal p2 of the downstream conveyor 1b. ing.

  The far-infrared irradiating device 3 and the ultraviolet irradiating device 4 are arranged in a front-rear arrangement at a specific height above the downstream conveyor 1b, and the former irradiation device 3 is to be coated horizontally on the downstream conveyor 1b. It is assumed that the far-infrared ray is irradiated on w, and the latter irradiation device 4 is configured to irradiate the object to be coated w that is horizontally conveyed by the downstream conveyor 1b with ultraviolet rays.

  A paint recovery rod 10 is installed directly below the paint outflow head 2 via a support member (not shown) in a substantially horizontal shape in the left-right direction f02, and a floor surface 11 below the paint recovery rod 10 is provided. Above, a paint storage tank 12 is provided in which the paint liquid t received in the paint recovery tank 10 flows by gravity through the guide passage 10a. Further, the paint liquid t in the paint storage tank 12 is sucked into the suction line 8b. In addition, a liquid feed pump 13 is provided which feeds the paint supply pipe member 7 through the supply line 8a at a flow rate having an arbitrary specific size.

Next, an example of use in the case where a planar plate-like plate-like body which is the object to be coated w is painted by the flow coater of the above embodiment and the operation of each part will be described.
When the liquid feed pump 13 is actuated, the paint liquid t in the paint storage tank 12 is sucked into the liquid feed pump 13 through the suction line 8b, and is further fixed to an appropriate size in the paint supply pipe member 7 through the supply line 8a. It is sent at a flow rate. The paint liquid t that has reached the paint supply pipe member 7 flows out into the auxiliary paint reservoir 6 through the slit port 7b in the direction of the rear f2, and the paint liquid t that has flowed out in this way is supplied to the auxiliary paint reservoir 6. 6 fills the paint reservoir space a2, flows between the paint supply pipe member 7 and the auxiliary paint reservoir 6 to the front f1, overflows from the upper edge b3 of the inclined rear wall portion 6b to the rear f2 side. It flows into the paint reservoir main body 5.

  At this time, the flow of the coating liquid t flowing out from the slit port 7b of the coating material supply pipe member 7 causes turbulence such as vortex in the coating liquid t in a state where the coating liquid main body 5 is filled. The disturbance is attenuated until the paint liquid t flowing out from the slit port 7b reaches the upper edge b3 of the inclined front wall part 6b of the auxiliary paint reservoir part 6, and the paint liquid t in the liquid reservoir space a2 is almost all. In an undisturbed state, the fluid flows into the paint reservoir space a <b> 1 of the paint reservoir main body 5 in a uniform flow state from the full length range of the upper edge b <b> 3 in the left-right direction f <b> 02 at any position in the left-right direction f <b> 02.

  The coating liquid t that has flowed into the substantially full length range in the left-right direction f02 on the front f1 side in the paint reservoir body 5 fills the paint reservoir space a1 of the paint reservoir body 5, and then the auxiliary paint reservoir 6 and the paint reservoir body. Flows to the rear f2 through the space between the upper part b1 and the like, overflows from the full length range of the upper edge b1 of the inclined rear wall part 5a to the rear f2 side, falls down by gravity while being guided by the vertical guide surface part 5e, and vertically Under the guide surface portion 5e, it becomes a curtain and further falls. At this time, the auxiliary paint reservoir 6 and the paint reservoir main body 5 attenuate the disturbance existing in the coating liquid t flowing between them to the rear f2 and suppress the disturbance to be newly generated. The flow of the coating liquid t that has reached the upper edge b1 of the inclined rear surface wall 5a is in an extremely uniform state without any disturbance.

  Therefore, the coating liquid t overflowing from the upper edge b1 overflows with the same front-rear direction f thickness and the same flow velocity in the entire length range of the upper edge b1 in the left-right direction f02, and thereafter, the vertical guide surface portion 5e. The curtain-like falling coating liquid t1 is formed on the lower side of the vertical guide surface portion 5e. At this time, the curtain-like falling coating liquid t1 has a length f02 in the left-right direction of the upper edge b1. The width in the left-right direction f02 is substantially the same, and the state in which the front-rear direction f thickness and the downward flow velocity at an arbitrary position in the left-right direction f02 are the same is stably maintained.

  The curtain-like falling coating liquid t1 further falls through the space between the upstream conveyor 1a and the downstream conveyor 1b, and is then received by the paint recovery tank 10, and then flows into the paint storage tank 12 by the action of gravity. The paint liquid t flowing in in this way is again sent out to the supply line 8a by the liquid feed pump 13, and thereafter circulated through the same path as described above.

Under such an operating state, the operator starts the conveyor 1 and the peripheral surface portions w1 to w4 are inclined at 45 degrees with respect to the front-rear direction f at the conveyance start end p1 of the upstream conveyor 1a. Placed on.
The plate-like body w placed in this way is first transported to the horizontal front f1 by the conveyor belt 9 of the upstream conveyor 1a to pass through the curtain-like falling paint liquid t1, and then to the transport start end of the downstream conveyor 1b. After that, it is further conveyed by the conveyor belt 9 to the horizontal front f1.

  At this time, in the process of moving the front body f1 of the plate-like body w, the curtain-like falling coating liquid t1 first comes into contact with and adheres to the peripheral surface portions w1 and w2 on the front side f1 of the plate-like body w. In this case, the upper surface of the plate-like body w is sequentially applied from the front f1 side. When the plate-like body w has passed through the curtain-like falling coating liquid t1, the coating liquid t has the same thickness. It will be in the state adhered to the whole upper surface of the state body w. At this time, the left and right peripheral surface portions w1 and w2 on the front side are straight and inclined by 45 degrees with respect to the front-rear direction f. Therefore, the coating liquid t has an equal thickness on the front and left peripheral surface portions w1 and w2. To be attached. The curtain-like falling coating liquid t1 tends to be pulled to the front f1 by the front f1 movement of the plate-like body w, and this tendency is suppressed by the guiding action directly below the vertical guide surface portion 5e. It will be deposited stably and accurately on w. At this time, the coating liquid t is not in a state of being applied to the peripheral surface portions w3 and w4 on the rear f2 side of the plate-like body w.

Thereafter, in the process in which the downstream conveyor 1b further conveys the plate-like body w to which the coating liquid t is applied to the front f1, the coating liquid of the plate-like body w reached by the far-infrared ray irradiation device 3 below this. t is heated and dried, and the ultraviolet irradiation device 4 cures the coating liquid t of the plate-like body w that has reached the lower side thereof.
When the plate-like body w reaches the conveyance end p2 of the conveyor 1, the plate-like body w is moved onto a work table (not shown) by an operator, and is attached to the plate-like body w on the work table and cured. Polishing is performed so that the outer surface of the coating liquid t in a state of smoothing becomes a smooth flat surface, and fine dust and the like adhering to the outer surface are removed cleanly. Thereafter, the operator manually conveys the plate-like body w to the vicinity of the conveyance start end p1 of the conveyor 1, where it is reversed in the front-rear direction with respect to the previous conveyance posture. It is placed on the conveyance start end p1.

  As a result, the plate-like body w is conveyed to the front f1 by the conveyor belt 9 of the upstream conveyor 1a and moved again so as to pass the curtain-like falling paint liquid t1, Accordingly, the plate-like body w is coated with the coating liquid t on the front left and right peripheral surface portions w3 and w4 and the entire upper surface in the moving direction in accordance with the previous case. At this time, since the coating liquid t is once again applied to the upper surface of the coating liquid t previously applied to the upper surface of the plate-shaped body w and flattened by polishing, the plate-shaped body w The flatness of the outer surface of the coating liquid t applied to the upper surface of the substrate is improved, and fine dust is removed from the plate-like body w at the time of polishing. It becomes difficult for dust and the like to be mixed into the applied coating liquid t. Therefore, the coating liquid t is in a state of being applied with good quality on the upper surface of the plate-like body w and the peripheral surface portions w1 to w4 on all sides.

  In the above embodiment, the provision of the auxiliary paint reservoir portion 6 in the paint reservoir main body 5 means that the paint reservoir space a1 has substantially the same cross-sectional shape in the front-rear direction f as compared to the case where it is not provided. When the condition is satisfied, the maximum width of the falling paint liquid t1 in the left-right direction f02 can stably obtain the curtain-like flowing paint liquid t1 having the same size in the front-rear direction f thickness and the downward flow velocity in the left-right direction f02. (This is generally a size that matches the length f02 of the paint outflow portion b1 in the left-right direction.).

  When the applicant actually tested the flow coater of the above-mentioned embodiment, the auxiliary paint reservoir 6 was not provided, but was directly supplied from the paint supply pipe member 7 into the paint reservoir main body 5 of a specific size. The maximum length in the left-right direction f02 of the paint outflow part b1 where a specific curtain-like flowing-down paint liquid t1 having the same thickness and flow velocity in the left-right direction f02 can be stably obtained is about 1200 mm. However, the auxiliary paint reservoir 6 is provided and supplied first from the paint supply pipe member 7 into the auxiliary paint reservoir 6 and then from the auxiliary paint reservoir 6 into the paint reservoir main body 5 of the specific size. When the construction was made to flow, even if the length of the paint reservoir main body 5 in the left-right direction f02 was 1600 mm or more, the specific curtain-like falling paint liquid t1 was stably obtained.

  This also means the following: That is, the auxiliary paint reservoir portion 6 is not provided, and the paint supply pipe member 7 is allowed to flow directly into the paint reservoir main body portion 5 and the left and right direction of the paint outflow location b1. In a flow coater having a length of f02 of about 1600 mm or more, for example, a curtain-like falling coating liquid t1 is formed on the lower side of the coating liquid main body portion 5 from which the coating liquid t flows out from the upper edge b1. Even when the back-and-forth direction f thickness and the downward flow velocity become unstable, the front-and-rear direction f thickness and the downward flow rate of the curtain-like falling coating liquid t1 are set to the left and right directions by providing the auxiliary paint reservoir 6. This is the same at an arbitrary position of f02.

The above embodiment can be modified as follows.
That is, the auxiliary paint reservoir 6 is not moved to the front or back of the paint reservoir main body 5 as long as the thickness of the curtain-like falling paint liquid t1 and the stability of the flow velocity f02 are not impaired. It is also possible to adopt a structure that is positioned at the approximate center of the width f of the paint reservoir space a1 in the front-rear direction, and the paint liquid enters the paint reservoir space a2 of the auxiliary paint reservoir 6 from the paint supply pipe member 7 through the slit port 7b. The outflow direction at the time of flowing out t may be appropriately changed as necessary.

It is a side view of the flow coater concerning one example of the present invention. It is a partial side view of the flow coater. It is a plane view explanatory view of the flow coater. It is a partial perspective view of the flow coater.

Explanation of symbols

5 Paint Paint Body 6 Auxiliary Paint Pool 7 Paint Supply Port Member b1 Upper Rear Edge of Paint Pool Body b3 Upper Front Edge of Auxiliary Paint Pool f02 Left-Right Direction t Paint Liquid

Claims (5)

  A paint supply port member is provided in the bowl-shaped paint reservoir main body, and the paint liquid supplied at a specific flow rate overflows from the upper edge of one side wall in the length direction of the paint reservoir main body in the form of a curtain, and is covered at the lower part. In a flow coater that is used to pass a coated object, a hook-shaped auxiliary paint reservoir portion having a relatively small volume is separately disposed within a hook-like length range in the paint reservoir main body portion, and the auxiliary paint reservoir is provided. The paint supply port member is installed in the interior, the paint liquid is previously discharged from the paint supply port member into the auxiliary paint reservoir, and the paint liquid is overflowed from one longitudinal wall surface of the auxiliary paint reservoir. A flow coater characterized by a configuration that is indirectly supplied into the reservoir body.   The location where the location where the paint liquid supplied into the auxiliary paint reservoir overflows into the paint reservoir main body and the location where the paint fluid overflows within the paint reservoir main body is in conflict is formed. Item 3. The flow coater according to Item 1.   3. A flow coater according to claim 1 or 2, wherein the paint reservoir portion has substantially the same shape and dimensions as the paint reservoir body portion.   The slit opening of the paint supply port member for supplying the paint liquid into the auxiliary paint reservoir part is positioned opposite to the side where the paint liquid in the auxiliary paint reservoir part overflows into the paint reservoir body part. The flow coater according to 1, 2 or 3.   The flow coater according to any one of claims 1 to 4, wherein the length of the bowl-shaped paint reservoir main body portion in the left-right direction is about 1600 mm or more.

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