JP2009165932A - Method and apparatus for applying adhesive, and method and apparatus for transferring adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for applying an adhesive, and a method and an apparatus for transferring an adhesive, each capable of highly accurately controlling the thickness of an adhesive layer. <P>SOLUTION: Upon forming an adhesive layer 300a of a prescribed thickness over the surface of an article to be coated by moving a planar squeegee 12 in a predetermined direction to stretch and extend an adhesive 300 thereover, the thickness of the adhesive layer 300a is controlled by a tilting angle of the squeegee 12 relative to the surface of the article to be coated, which angle is formed by tilting the squeegee 12 relative to the surface of the article to be coated in the direction opposite to the moving direction of the squeegee 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adhesive application method and an adhesive application device for applying an adhesive to a member to be applied, and an adhesive transfer method and an adhesive transfer device for transferring the adhesive to another member.

  Conventionally, when producing a product, a method of joining members with an adhesive has been widely performed.

  The joining method using such an adhesive is similarly performed for a fine mechanical product on the order of several μm. However, unlike a general product, in the case of a fine mechanical product, if the adhesive is applied thickly, the yield decreases, so it has to be applied very thinly.

  Conventionally, as a method of attaching an adhesive very thinly to a member, an adhesive layer is formed by previously spreading the adhesive on a film, and the adhesive is applied by pressing the member against the film. There is an adhesive transfer method of transferring to a member (for example, see Patent Document 1). By this adhesive transfer method, it is possible to attach the adhesive to the member very thinly, and it is possible to perform bonding using the adhesive even in a fine machine product.

JP-A-8-309271

  However, in the above-described conventional adhesive transfer method, when the adhesive is spread on the film in advance, the thickness of the adhesive layer is the size of the gap between the tip of the vertically supported blade (squeegee) and the film. It is prescribed by The size of the gap may easily change on the order of several μm due to expansion of the squeegee table due to changes in the surrounding temperature environment. For this reason, when the thickness of an adhesive bond layer is very thin, there exists a possibility that the adhesive bond layer of desired thickness cannot be formed. As a result, there was a possibility that an adhesive layer having a desired thickness could not be adhered.

  Such a problem does not exist only in the transfer method described above, but generally exists when an adhesive is applied to a certain member.

  In view of such circumstances, the present invention provides an adhesive application method, an adhesive application device, an adhesive transfer method, and an adhesive transfer device that can adjust the thickness of a very thin adhesive layer with high accuracy. Objective.

An aspect of the present invention that solves the above-described problem is that a flat squeegee is moved in a predetermined direction, and an adhesive is extended on the surface of the member to be coated. When forming on the surface, the squeegee is inclined with respect to the surface of the member to be coated on the side opposite to the moving direction of the squeegee, and the thickness of the adhesive layer is adjusted according to the angle. It is in the adhesive application method.
Specifically, the greater the thickness of the adhesive layer, the smaller the inclination angle of the squeegee with respect to the member to be coated.
According to this, the thickness of the adhesive layer formed on the surface of the member to be coated can be adjusted with high accuracy.

In another aspect of the present invention, the member to be transferred is pressed and contacted with the member to which the adhesive is extended by the adhesive coating method of the above aspect, whereby the surface of the member to be coated is brought into contact with the member to be transferred. The adhesive is transferred to the adhesive, and the adhesive is transferred.
In this aspect, the thickness of the adhesive layer transferred to the workpiece can be adjusted with high accuracy.

Furthermore, another aspect of the present invention provides a flat squeegee for forming an adhesive layer having a predetermined thickness by extending an adhesive on the surface of a member to be coated, and squeegee moving means for moving the squeegee in a predetermined direction. And a squeegee angle changing means configured to be able to incline the squeegee to the opposite side of the predetermined direction with respect to the application member, and to fix the squeegee in an inclined state, and an inclination angle of the squeegee. And an adjusting means for adjusting the thickness of the adhesive layer by adjusting.
In this aspect, the adhesive layer whose thickness is adjusted with high accuracy can be formed on the surface of the member to be coated.

In addition, another aspect of the present invention includes the adhesive application device according to the above aspect, and a transfer unit that transfers the adhesive spread on the surface of the member to be applied by the adhesive application device to the member to be transferred. In the adhesive transfer device characterized.
In this aspect, the adhesive layer whose thickness is adjusted with high accuracy can be transferred to the workpiece.

  Hereinafter, the present invention will be described in detail based on embodiments. In the following, an epoxy adhesive (thermosetting) is used as the adhesive. In addition, a flexible Lumirror film (polyester film) having a strip shape and a thickness of about several tens of μm is used as a member to which the adhesive is applied. Hereinafter, this lumirror film is referred to as a film.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an adhesive transfer device according to the present embodiment. As shown in this figure, the adhesive transfer device 100 according to the present embodiment forms an adhesive layer 300a (not shown in FIG. 1) by extending the adhesive 300 on the surface of the belt-like film 200. A coating apparatus 10 is provided. In addition, the adhesive transfer device 100 includes a transport unit that transports the film 200 to the adhesive application device 10 and the transfer unit 20, and a film clamp that holds the film 200. In addition, the adhesive transfer device 100 includes a transfer unit 20 that transfers the adhesive layer 300a extended on the surface of the film 200 to a workpiece 400 that is a member to which the adhesive layer 300a is to be attached. In addition, the arrow in a figure has shown the flow direction of the film 200. FIG.

  The adhesive application device 10 will be described in detail later.

  The conveying means is composed of a torque motor 31 that generates torque, and always applies a constant traction force to the film 200.

  As shown in FIG. 1, the film clamp 32 is arranged on the upstream side in the transport direction of the film 200 with respect to the adhesive application device 10, and has a function of holding the film 200 and releasing the holding of the film 200.

  The torque motor 31 and the film clamp 32 allow the film 200 to stand still when gripped by the film clamp 32, and to be wound around the torque motor 31 when gripping by the film clamp 32 is released. .

  The transfer unit 20 is a part that transfers the adhesive layer 300a on the surface of the film 200 to the workpiece 400 by pressing the workpiece 400 against the film 200 having the adhesive layer 300a formed on the surface thereof by the adhesive application device 10. . Specifically, the transfer unit 20 is disposed between the adhesive application device 10 and the torque motor 31 and includes a transfer table 21 and a workpiece gripping device (not shown).

  The transfer table 21 is a member on which the film 200 with the adhesive 300 extended is placed on the surface, and the upper surface is horizontal. The transfer table 21 is preferably formed of a material that is not easily worn and deformed.

  The workpiece gripping device has a function of gripping the workpiece 400 and pressing and contacting the film 200 placed on the transfer table 21. The workpiece gripping device is configured to bring the workpiece 400 into contact with the film 200, transfer the workpiece 400 to a predetermined location, release the gripping, and grip a new workpiece 400.

  Hereinafter, the adhesive application device 10 of the adhesive transfer device 100 described above will be described in detail.

  FIG. 2 is an external perspective view of the adhesive application device according to the present embodiment. FIG. 3A is a side view of the squeegee, and FIG. 3B is a side view of the squeegee when the adhesive is applied.

  As shown in FIG. 2, the adhesive application device 10 according to the present embodiment includes a squeegee base 11 and a squeegee 12. Further, the adhesive application device 10 includes a gripping device 13 that grips the squeegee 12. The adhesive 300 is supplied from the outside by a human.

  The squeegee base 11 is a substantially rectangular parallelepiped member, and includes a film placing portion 11 a on which the film 200 is placed and a squeegee sliding portion 11 b on which the tip of the squeegee 12 slides. The squeegee base 11 is preferably formed of a material that is not easily worn and deformed.

  The film mounting portion 11a is a portion where the adhesive extension work is actually performed by the squeegee 12, and the upper surface thereof is horizontal.

  The squeegee sliding portion 11b is provided on both sides in the width direction of the film placement portion 11a, and the upper surface thereof is horizontal and is higher than the upper surface of the film placement portion 11a. Specifically, the difference in height between the upper surface of the squeegee sliding portion 11 b and the upper surface of the film placement portion 11 a is in accordance with the thickness of the adhesive 300 that is desired to be attached to the film 200.

  The squeegee 12 has a thin spatula shape having a width longer than the width of the squeegee base 11. Further, as shown in FIG. 3A, the squeegee 12 is gradually reduced in thickness toward the front end portion and polished at the front end portion, and the squeegee 12 is squeezed by the squeegee base 11. In a state of being held perpendicular to the film placement portion 11a, the film placement portion 11a is parallel to the film placement portion 11a. Since the squeegee 12 is pressed against the squeegee sliding portion 11b of the squeegee base 11, the squeegee 12 has a strength that does not break even when pressed.

  The gripping device 13 is a member that grips the squeegee 12. Specifically, the gripping device 13 supports the squeegee 12 in a state orthogonal to the longitudinal direction of the squeegee base 11 on the squeegee base 11 as an initial state. The gripping device 13 has a shaft 13a parallel to the longitudinal direction of the squeegee 12, is configured to be rotatable around the shaft 13a, and can be fixed in a state inclined about the shaft 13a. It is configured. Further, the gripping device 13 is configured to be movable in the vertical vertical direction and the longitudinal direction of the squeegee base 11. Thus, the squeegee 12 is configured to be movable in the longitudinal direction and the vertical vertical direction of the squeegee base 11 while being inclined at a predetermined angle with respect to the squeegee base 11.

  Here, even if the inventor uses the same squeegee base 11 and the squeegee 12, rather than moving the squeegee 12 in a state of being held perpendicular to the film 200 placed on the squeegee base 11, It has been found that the thickness of the adhesive layer 300a to be formed increases when the squeegee 12 is moved while being inclined in the direction opposite to the moving direction.

  In the present invention, the thickness of the adhesive layer 300a is adjusted by inclining and moving the squeegee 12 based on such knowledge.

  Specifically, in the adhesive application device 10 according to the present embodiment, as shown in FIG. 3B, the horizontal movement direction of the squeegee 12 with respect to the squeegee base 11 (the arrow in FIG. 3B). The squeegee 12 is brought into contact with the squeegee sliding portion 11b of the squeegee base 11 in a state where the squeegee 12 is inclined to the opposite side. And while maintaining this inclined state, the squeegee base 11 is moved to extend the adhesive 300 onto the surface of the film 200, thereby forming the adhesive layer 300a on the surface of the film 200. At this time, the thickness of the adhesive layer 300 a is adjusted by adjusting the angle of the inclination angle A of the squeegee 12 with respect to the film 200.

  Here, as a result of actually changing the inclination angle A of the squeegee 12 with respect to the film 200 to various values and moving the squeegee 12, the result shown in FIG. 4 was obtained. That is, as shown in FIG. 4, when the squeegee 12 is tilted from a state where the tilt angle A is a right angle in a direction to decrease the tilt angle A, the thickness of the adhesive layer 300a formed on the surface of the film 200 increases. It was recognized that A generally proportional relationship was observed between the amount of decrease in the inclination angle A and the thickness of the adhesive layer 300a. On the other hand, when the squeegee 12 is inclined in the direction of increasing the inclination angle A, that is, when the squeegee 12 is inclined in the same direction as the moving direction of the squeegee 12, the thickness of the adhesive layer 300a formed on the surface of the film 200 is increased. It was also observed that there was almost no change.

  Thus, by using the adhesive application device 10 according to the present embodiment, the thickness of the adhesive layer 300a formed on the film 200 can be adjusted by the angle of the squeegee 12. For example, when it is desired to form an adhesive layer 300a having a thickness of 5.0 μm on the surface of the film 200, when the squeegee 12 is moved in a state where the squeegee 12 is vertically supported with respect to the squeegee base 11, the formed adhesive is formed. Assume that the thickness of the layer 300a is 4.8 μm. Therefore, in the adhesive application device 10 according to the present embodiment, a small amount of the adhesive 300 is dropped, the squeegee 12 is inclined and moved in the direction opposite to the moving direction, and the adhesive 300 is extended to easily increase the thickness. Can form the adhesive layer 300a having a thickness of 5.0 μm. That is, if the adhesive application device 10 according to this embodiment is used, the thickness of the adhesive layer 300a can be adjusted with high accuracy.

  In addition, when the adhesive application device 10 according to the present embodiment is used, the adhesive layers 300a having a plurality of thicknesses can be intentionally formed using a pair of the squeegee base 11 and the squeegee 12.

  Further, since the adhesive transfer device 100 according to the present embodiment includes the adhesive application device 10 as described above, the thickness of the adhesive layer 300a attached to the workpiece 400 can be adjusted with high accuracy.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.

  For example, in the embodiment described above, the adhesive application device 10 tilts the squeegee 12 with respect to the squeegee base 11. However, the squeegee base 11 may be inclined relative to the squeegee base 11 by inclining the squeegee base 11 with respect to the squeegee 12.

  In addition, the adhesive application device 10 may include an adjusting unit that adjusts the thickness of the adhesive layer 300 a by adjusting the angle of the inclination angle A of the squeegee 12 with respect to the film 200. That is, the adhesive application device 10 may be configured such that the angle of the inclination angle A is automatically adjusted to a predetermined angle by the adjusting means.

  In the above description, the film has been described as the member to be coated for forming the adhesive layer. However, the present invention is useful when applied to the adhesive.

It is a schematic block diagram of the adhesive agent transfer apparatus which concerns on Embodiment 1 of this invention. It is an external appearance perspective view of the adhesive agent coating device which concerns on Embodiment 1 of this invention. It is a side view of the squeegee of the adhesive agent coating apparatus which concerns on Embodiment 1 of this invention. It is the graph which showed the relationship between the inclination-angle of a squeegee and the thickness of an adhesive bond layer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Adhesive application apparatus, 11 Squeegee stand, 11a Film mounting part, 11b Squeegee sliding part, 12 Squeegee, 13 Gripping apparatus, 13a Axis, 31 Torque motor, 32 Film clamp, 100 Adhesive transfer apparatus, 200 Film, 300 Adhesive, 300a Adhesive layer, 400 workpieces

Claims (5)

When the adhesive layer having a predetermined thickness is formed on the surface of the coated member by moving the flat squeegee in a predetermined direction and extending the adhesive on the surface of the coated member,
The adhesive coating method, wherein the squeegee is inclined to the opposite side of the surface of the member to be coated with the moving direction of the squeegee, and the thickness of the adhesive layer is adjusted by the angle. In the adhesive application method according to claim 1,
The adhesive coating method characterized in that the greater the thickness of the adhesive layer, the smaller the inclination angle of the squeegee with respect to the coated member. The member to be transferred is pressed and contacted with the member to which the adhesive is extended by the adhesive application method according to claim 1 or 2, so that the member to be transferred is stretched on the surface of the member to be coated. An adhesive transfer method comprising transferring the adhesive. A flat squeegee that forms an adhesive layer with a predetermined thickness by extending an adhesive on the surface of the coated member;
Squeegee moving means for moving the squeegee in a predetermined direction;
Squeegee angle changing means configured to be able to incline the squeegee to the opposite side of the predetermined direction with respect to the application target member and to fix the squeegee in an inclined state;
An adhesive applicator comprising adjusting means for adjusting a thickness of the adhesive layer by adjusting an inclination angle of the squeegee. 5. An adhesive transfer device comprising: the adhesive application device according to claim 4; and a transfer unit that transfers the adhesive extended on the surface of the member to be applied by the adhesive application device to the member to be transferred. .

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