WO2010035478A1

WO2010035478A1 - Applicator and application method

Info

Publication number: WO2010035478A1
Application number: PCT/JP2009/004870
Authority: WO
Inventors: 横田典之
Original assignee: 芝浦メカトロニクス株式会社
Priority date: 2008-09-26
Filing date: 2009-09-25
Publication date: 2010-04-01
Also published as: JPWO2010035478A1; KR20110063552A; CN102164683B; KR101660062B1; CN102164683A; TWI468229B; JP5215405B2; TW201023981A

Abstract

An applicator capable of distributing an adhesive agent to the entire surface of a work when the work is bonded and of preventing the adhesive agent from being extruded. The applicator comprises a supply section (S) for supplying the adhesive agent (R) in such a manner that the application ends of the adhesive agent (R) near two corners of the rectangular work (W) are positioned nearer the edges of the work (W) than the application ends of the adhesive agent (R) between the two corners. The supply section (S) comprises a plurality of nozzles (21, 31) for feeding the adhesive agent (R) and a drive section for linearly driving the supply section (S). The supply section (S) further comprises a first supply section (2) for applying the adhesive agent (R) from the portions near the two corners of the work (W) to the portions near two corners opposite to the afore-said two corners and a second supply section (3) for applying the adhesive agent (R) between these two corners.

Description

Coating apparatus and coating method

The present invention relates to a coating apparatus and a coating method in which a technique for applying an adhesive is applied in order to bond, for example, a rectangular flat plate-like workpiece such as a liquid crystal module and a cover panel.

Generally, a liquid crystal panel is manufactured by attaching a panel or sheet that protects the surface of a liquid crystal module to a liquid crystal module or the like. In order to bond such a liquid crystal module to a panel or sheet (hereinafter referred to as a workpiece), an adhesive is applied to one of a pair of workpieces by a coating device, and then the other workpiece is pressure-bonded to the other workpiece. Necessary.

樹脂 Resin is generally used as the adhesive. For example, a spin coating method, a slit coating method, or the like exists as a method for bonding the entire surface of a workpiece using a resin. The spin coat method is a method in which an adhesive dropped on a work is spread by a centrifugal force generated by rotating the work. The slit coating method is a method in which an adhesive is applied to the entire surface of a workpiece by moving the head or the workpiece while dropping the adhesive from a head having a slit-like opening that is long in the width direction of the workpiece ( Patent Document 1).

JP 2000-05682 A JP 2002-323687 A

By the way, since the spin coat method uses a centrifugal force of rotation, the spreading direction is radial. For this reason, the spin coating method is suitable when the workpiece has a circular shape with the same distance from the center to the edge. However, in the case of a square-shaped workpiece, the distance from the center of the workpiece to the edge is not equal, and particularly at the corners, it is difficult to spread the adhesive uniformly. In the case of the slit coating method, since the coating width is determined by the slit length, it is difficult to adjust the coating width, the coating amount, etc. according to the workpiece.

In order to cope with this, a coating method using a multi-point nozzle has been proposed. This is a method of applying adhesive R in a plurality of parallel straight lines by dropping adhesive R while moving a plurality of nozzles relative to workpiece W as shown in FIG. (See Patent Document 2). According to the application method using such a multi-point nozzle, it is possible to adjust the application width and the application amount according to the workpiece by selecting which of a plurality of nozzles is opened and closed.

However, even when the adhesive R is applied using such a multi-point nozzle, when the other workpiece W is pressure-bonded thereto, the spreading speed of the adhesive R is uniform over the entire surface as shown in FIG. Don't be. That is, when the workpiece W is pressure-bonded to the adhesive R applied in a straight line, as shown in FIG. 11 (a), the horizontal direction (left and right direction in the figure) rather than the vertical direction (up and down direction in the figure). The spread is faster.

As shown in FIG. 11B, when a plurality of adhesives R applied in a straight line are adjacent to each other, when adhering the adhesives R to each other at the time of pressure bonding, the space is filled. The amount that spreads in the vertical direction (per unit time) increases rapidly. Therefore, finally, as shown in FIG. 12, the adhesive R protrudes from the side portion before the adhesive R reaches the four corners, or before the sufficient adhesive R reaches the four corners. There was a possibility.

Thus, when the adhesive R does not spread, it leads to adhesion failure. Further, in the case of semiconductor pellet bonding, the adhesive R protrudes to a certain extent because there is no electrode on the side surface side. However, in the case of a liquid crystal panel, the protruding adhesive affects the lead electrode, etc., so it is necessary to prevent the protrusion by forming a bank on the edge, or to wipe off the protruding adhesive. It was over.

The present invention has been proposed in order to solve the above-described problems of the prior art. The purpose of the present invention is to spread the adhesive over the entire surface of the workpiece when bonding the workpiece, An object of the present invention is to provide a coating apparatus and a coating method capable of preventing the protrusion of the agent.

In order to achieve the above object, the present invention provides a coating apparatus for applying an adhesive to a rectangular flat plate-shaped workpiece, wherein the adhesive application end in the vicinity of the two corners of the workpiece is more than the adhesive application end in between. And a supply section for supplying an adhesive so as to be close to the edge of the workpiece between the two corners.

According to another aspect, in the coating method in which an adhesive is applied to a rectangular flat plate-shaped workpiece, the adhesive application end in the vicinity of the two corners of the workpiece is located between the two corners rather than the adhesive application end in between. An adhesive is supplied so as to be close to the edge of the workpiece.

In another aspect, in the coating method in which a plurality of linear adhesives are applied to a rectangular flat plate-like workpiece, the adhesive application end in the vicinity of the two corners of the workpiece is more than the adhesive application end in between. It is characterized by being close to the edge of the workpiece between the two corners.

In the invention as described above, when the workpiece is crimped, the adhesive is applied in advance near the edge of the workpiece in the vicinity of the corner of the workpiece where the spread of the adhesive is delayed, so that some protrusion is prevented. However, the adhesive spreads over the entire surface of the workpiece.

In another aspect, the supply unit includes a plurality of supply ports for supplying an adhesive, and the supply unit and the workpiece are applied such that the adhesives that have been output from the plurality of supply ports are applied in a plurality of lines. It has the drive part which drives at least one of these in a linear form.

In the above aspect, the adhesive can be applied in parallel straight lines by supplying the adhesive from the plurality of openings while relatively moving the supply portion relative to the workpiece. By selecting the opening to be used, the coating width, coating amount, etc. can be easily adjusted.

Another aspect is characterized in that the supply section is provided such that the angle can be changed.

In the above aspect, the position of the application end of the adhesive from the edge of the workpiece can be easily adjusted by inclining the supply section.

In another aspect, the supply unit applies an adhesive between a first supply unit that applies an adhesive in the vicinity of two corners of the workpiece and an adhesive that is applied in the vicinity of the two corners of the workpiece. And a second supply unit.

In the above aspect, the difference between the coating ends can be easily realized by separating the first supply unit and the second supply unit.

Another aspect is characterized in that the first supply unit and the second supply unit are independently movable.

In the above-described aspect, the coating length can be easily changed by the first supply unit and the second supply unit moving independently.

Another aspect is characterized in that the first supply unit and the second supply unit have a sending unit or a switching unit for controlling whether or not the adhesive is supplied.

In the above aspect, the position of the application end of the adhesive can be easily adjusted by changing the supply timing by the first supply unit and the second supply unit by operating the delivery unit or the switching unit. it can.

As described above, according to the present invention, it is possible to provide a coating apparatus and a coating method capable of spreading an adhesive over the entire surface of a workpiece and preventing the adhesive from protruding when the workpiece is bonded. Can do.

It is a perspective view which shows the structure of one Embodiment of this invention. It is a top view which shows the example of application | coating of A area | region by embodiment of FIG. It is a top view which shows the example of application | coating of the B area | region by embodiment of FIG. It is a top view which shows the application result by embodiment of FIG. It is a top view which shows the bonding after application | coating by embodiment of FIG. It is a perspective view which shows an example of the supply part of other embodiment of this invention. It is a top view which shows the outward path | route of the example of application by other embodiment of this invention. It is a top view which shows the return path | trip of the application example of FIG. It is a top view which shows the application result of the application example of FIG. It is a top view which shows the example of application by the conventional multipoint nozzle. It is explanatory drawing which shows the breadth of the adhesive agent after application | coating of FIG. It is a top view which shows the bonding after application | coating of FIG.

Next, embodiments of the present invention (hereinafter referred to as embodiments) will be specifically described with reference to the drawings.
[Constitution]
First, the configuration of the present embodiment will be described. As shown in FIG. 1, the coating apparatus 1 of the present embodiment includes a table T, a supply unit S, and the like. The table T is a table on which a rectangular workpiece W to which the adhesive R is applied is placed.

The supply unit S includes a first supply unit 2, a second supply unit 3, and the like. The first supply unit 2 includes a supply head 22 and an arm 23. The supply head 22 includes a single nozzle 21 facing downward. The supply head 22 is attached to the end of the arm 23. Although not shown, the nozzle 21 is connected to an adhesive supply source such as a tank via a passage and piping in the arm 23. Further, although not shown in the drawing, a pump as an adhesive delivery means, a valve as an opening / closing means, and the like are connected to the piping.

The second supply unit 3 includes a supply head 32, an arm 33, and the like. The supply head 32 includes a plurality of nozzles 31 facing downward. The plurality of nozzles 31 are arranged at equal intervals on a straight line. As shown in FIG. 2, the nozzles 31 at both ends of the supply head 32 have the first work W on the both sides of the work W when the centers of the supply head 32 and the width direction (the left-right direction in the drawing) of the work W are aligned. It is arranged so that a space for applying the adhesive R by the supply unit 2 is vacant. In this embodiment, the application space is about two lines on the left and right, but the present invention is not limited to a specific width.

The supply head 32 is connected to the end of the arm 33. Although not shown, the nozzle 31 of the supply head 32 is connected to an adhesive supply source such as a tank via a passage and piping in the arm 33. In addition, although not shown in the drawing, a pump as an adhesive delivery means, a valve as an opening and closing means, and the like are connected to the piping.

In addition, the 1st supply part 2 and the 2nd supply part 3 are provided by the drive part which is not shown in figure so that each can be raised / lowered independently and moved horizontally. Any known technique can be applied as the drive unit. For example, the

arms

23 and 33 can be moved up and down (Z-axis direction) by a cylinder, feed screw, rack or conveyor, or the

arms

23 and 33 can be moved in the horizontal direction (XY axis) by a feed screw, rack or conveyor. A scanning mechanism or the like that is driven in the direction) can be considered.

Note that the table T may be moved in the X, Y, and Z axis directions by being vertically movable by the drive unit as described above. That is, the table T, the 1st supply part 2, and the 2nd supply part 3 should just be the structures which move relatively.

The drive unit, pump, valve, etc. are controlled by the control device, such as the drive source, switch, power supply, etc. This control device is configured to operate each unit in the following procedure by, for example, a dedicated electronic circuit or a computer operating with a predetermined program.

[Action]
The operation of the present embodiment having the above-described configuration is as follows. Note that a method for controlling the coating apparatus according to the procedure described below and a computer program for operating the control apparatus are also one aspect of the present invention.

First, as shown in FIG. 1, an operator or a handling device or the like mounts a work W on the table T. Then, as shown in FIG. 2, the second supply unit 3 is aligned with the center in the width direction of the workpiece W by the drive unit. Then, the control unit causes the drive unit to move the second supply unit 3 in the longitudinal direction of the workpiece W (vertical direction in the drawing), and the adhesive R is dripped from the nozzle 31 by operating a pump, a valve, and the like. To do. As a result, the adhesive R is applied to the area A of the workpiece W on a plurality of parallel lines.

Next, as shown in FIG. 3, the first supply unit 2 is positioned by the drive unit so that the nozzle 21 comes near the lower right corner of the work W in the drawing. This position is made closer to the edge of the workpiece W than the end of the adhesive R applied to the area A. Then, the control unit causes the drive unit to move the first supply unit 2 in the longitudinal direction of the work W, and the adhesive R is dripped from the nozzle 21 by operating a pump, a valve, and the like.

The end of application of the adhesive R is also closer to the edge of the workpiece W than the end of the adhesive R applied to the area A. This operation is performed for each two rows in the left and right empty spaces in the area A (area B in the figure). Thereby, as shown in FIG. 4, the application end of the adhesive R in the vicinity of the four corners of the work W is closer to the edge of the work W than the application end of the adhesive R in the meantime (the work W faces the work W). Both ends of the adhesive R applied to the vicinity of the left and right sides (B region) are closer to the edge of the workpiece W than both ends of the adhesive R applied between the two sides (A region).

In this way, when the other workpiece (not shown) to be bonded is pressure-bonded to the workpiece W to which the adhesive R is applied, as described above, the vertical extension of the region A is larger than the region B. Although the speed is faster, both ends of the adhesive R in the region A are farther from the edge of the work W than both ends of the adhesive R in the region B. become. Therefore, as shown in FIG. 5, the adhesive R can be spread over the entire work W while preventing the protrusion. In addition, the control method of application | coating length may be performed by setting the length of application | coating time (dropping time of the adhesive agent R) to a control apparatus previously, and the 1st supply part 2 and the 2nd supply part 3 may be performed. The length of the moving distance may be set in the control device in advance.

[effect]
According to the present embodiment as described above, in the region (A region) where the spread of the adhesive R is fast at the time of pressure bonding, the application end of the adhesive R is retracted from the edge of the workpiece W, and the spread of the adhesive R is slow. For the region (B region), the application end of the adhesive R is brought close to the edge of the workpiece W, so that the difference between the arrival positions of the both ends within a predetermined time is corrected, and the entire workpiece W is prevented while protruding. Adhesive R can be spread over.

Also, in a large space (A region), the second supply unit 3 is used to apply a plurality of rows of adhesives R at the same time, and only the small space (B region) on both sides has the first supply unit 2 attached. Since it is used and applied by a single nozzle 21, it can be efficiently applied in a short time, and it can be easily matched to the desired application end position and the shape of the workpiece W.

[Other Embodiments]
The present invention is not limited to the embodiment as described above. For example, in the supply unit S, the first supply unit 2 and the second supply unit 3 are driven independently in the above embodiment. However, as shown in FIG. 6, you may comprise so that the 1st supply part 2 and the 2nd supply part 3 may move integrally.

In such a case, the first supply unit 2 supplies the adhesive earlier than the second supply unit 3 in the process of moving the supply unit S by controlling the pump operation, valve switching timing, and the like. If it is started and finished late, the same application as described above can be performed simultaneously, and the efficiency is high. In addition, the number of nozzles of the first supply unit 2 and the second supply unit 3 is not limited to the number exemplified in the above embodiment, and may be a single number or a plurality. Opening / closing means such as a shutter that opens and closes independently for each nozzle may be provided, or opening / closing means such as an independent shutter may be provided for the nozzle of the first supply unit and the nozzle of the second supply unit. .

Also, by providing a supply section S similar to the second supply section 3 described above so that the angle can be changed in the horizontal direction, it is possible to perform coating as shown in FIGS. As shown in FIG. 7, the supply unit S is inclined so that the application end of the adhesive R is close to one corner of the workpiece W and is moved in a straight line (outward). Apply the rows. After application to the opposite side, as shown in FIG. 8, the angle of the supply section S is changed in the reverse direction. Then, a plurality of lines are applied while moving linearly (return path) in the opposite direction. As a result, as shown in FIG. 9, the application end of the adhesive R is close to the edge of the workpiece W in the vicinity of the four corners of the workpiece W, so that the same effect as in the above embodiment can be expected.

The opening for supplying the adhesive is not limited to the shape of the nozzle. For example, it may be a simple hole or slit. The drive of the drive unit is not necessarily linear. For example, it may be driven to draw a predetermined corner or arc, or may be driven in a wavy or meandering manner. Any material that can be used now or in the future is applicable as the adhesive. For example, it is possible to apply a material that is cured by externally radiating electromagnetic waves in a broad sense, such as an ultraviolet curable resin or a radiation curable resin, or by applying a temperature change, such as a thermosetting resin.

The work to be bonded is typically a cover panel and a liquid crystal module (a touch panel, display panel, backlight laminated), but a device that bonds square flat work with corners (corners) As widely applicable.

DESCRIPTION OF SYMBOLS 1 ... Coating device 2 ... 1st supply part 3 ...

2nd supply part

21, 31 ...

Nozzle

22, 32 ...

Supply head

23, 33 ... Arm R ... Adhesive S ... Supply part T ... Table W ... Workpiece | work

Claims

In a coating device that applies adhesive to a rectangular flat workpiece,
It has a supply part which supplies adhesive so that the application end of adhesive in the vicinity of the two corners of the work is closer to the edge of the work between the two corners than the application end of the adhesive in between A characteristic coating apparatus.
The supply unit includes a plurality of supply ports for supplying an adhesive,
The drive unit that drives at least one of the supply unit and the workpiece in a linear manner so that the adhesive that has come out of the plurality of supply ports is applied in a plurality of linear shapes. The coating apparatus according to 1.
The coating apparatus according to claim 1, wherein the supply unit is provided so as to be capable of changing an angle.
The supply unit
A first supply unit for applying an adhesive to each of the two corners of the workpiece;
A second supply unit for applying an adhesive between the adhesives applied in the vicinity of the two corners of the workpiece;
The coating apparatus according to claim 1, further comprising:
The coating apparatus according to claim 4, wherein the first supply unit and the second supply unit are provided so as to be independently movable.
5. The coating apparatus according to claim 4, wherein the first supply unit and the second supply unit have a sending unit or a switching unit for controlling whether or not the adhesive is supplied.
In the application method of applying an adhesive to a rectangular flat work,
Application characterized in that the adhesive is supplied so that the adhesive application end in the vicinity of the two corners of the workpiece is closer to the edge of the workpiece between the two corners than the adhesive application end in between. Method.
In a coating method in which a plurality of linear adhesives are applied to a rectangular flat work,
An application method, wherein an adhesive application end in the vicinity of two corners of the workpiece is closer to an edge of the workpiece between the two corners than an adhesive application end in between.