JP2014031270A - Sheet application method and sheet application device - Google Patents

Abstract

An object of the present invention is to attach a sheet material to a flat article to be adhered while suppressing occurrence of defects in appearance.
SOLUTION: A processing chamber 10, a target object holding portion 20 provided in the processing chamber 10 and having a holding surface Sh for holding a flat target object 6, and a processing member 10 are provided in a sheet material. A sheet material holding portion 30 that has an adhesive surface Sa that holds the plate 5 in a flat shape and is movable so as to approach or separate in a state where the adhesive surface Sa faces the holding surface Sh of the adherend holding portion 20. The sheet material held by the sheet material holding unit 30 by bringing the sheet material holding unit 30 close to the holding surface Sh of the object holding unit 20 while maintaining the inside of the processing chamber 10 in a reduced pressure atmosphere. 5 and the adherend 6 held by the adherend holding part 20 are configured to be in close contact with each other.
[Selection] Figure 1

Description

  The present invention relates to a sheet sticking method and a sheet sticking apparatus, and more particularly to a sheet sticking method and a sheet sticking apparatus for sticking a sheet material to a flat article to be stuck.

  A mobile terminal such as a mobile phone having a display screen is equipped with a flat display panel for displaying an image. Here, on the surface of the display panel, for example, a sheet material such as an optically colorless and transparent double-sided tape is often attached to adhere a flat transparent member such as a cover glass.

  For example, in Patent Document 1, after firmly holding a sheet material on a sheet material holder by suction of air, a cover sheet material is sequentially applied from one end of the sheet material to the other end on the copper foil circuit surface of the sheet material. A pasting procedure for pasting is disclosed.

Japanese Patent Laying-Open No. 2004-217421 (FIG. 4)

  By the way, in the method of sequentially applying the sheet material to the surface of the flat display panel while pressing the sheet material with a roller, for example, when the sheet material is pressed with a roller at the beginning of the application, the sheet material has a concave distortion. May occur. Then, since the portable terminal provided with the display panel becomes defective in appearance quality, there is room for improvement.

  This invention is made | formed in view of this point, The place made into the objective is suppressing generation | occurrence | production of the defect of an external appearance and sticking a sheet | seat material to a flat-shaped to-be-adhered thing.

  In order to achieve the above object, the present invention is such that a sheet material held on a flat adhesive surface is brought into close contact with a flat plate-like object in a reduced pressure atmosphere.

  Specifically, the sheet sticking method according to the present invention includes a sheet material holding step for holding a sheet material on a flat adhesive surface, and an adherend holding step for holding a flat plate-like article on a flat holding surface, Then, after the held sheet material and the held object to be bonded are opposed to each other, the sheet material and the object to be bonded are brought into close contact with each other in a reduced-pressure atmosphere, whereby the sheet material is attached to the object to be bonded. And a pasting step for pasting.

  According to the above method, in the sticking step, the sheet material held on the flat adhesive surface in the sheet material holding step and the flat plate-like article held on the flat holding surface in the sticking object holding step are mutually connected. After facing each other, the sheet material and the object to be adhered are brought into close contact with each other in a reduced pressure atmosphere, so that the sheet material and the object to be adhered are adhered to each other with the entire surface uniformly adhered, and the concave shape in the sheet material Is suppressed, and the mixing of bubbles at the bonding interface between the sheet material and the object to be bonded is suppressed. Thereby, since generation | occurrence | production of the defect of an external appearance is suppressed, generation | occurrence | production of the external appearance defect is suppressed and a sheet | seat material is affixed on a flat-shaped to-be-adhered thing.

  In the sheet material holding step, the sheet material is temporarily held at a predetermined position on the flat suction surface, and the adhesive surface is brought into contact with the surface of the once held sheet material, and then the holding on the suction surface is performed. You may cancel.

  According to the above method, in the sheet material holding step, the sheet material is temporarily held at a predetermined position on the flat suction surface by, for example, vacuum suction using a plurality of suction holes formed on the suction surface, and then temporarily held. After the flat adhesive surface is brought into contact with the surface of the sheet material, the holding on the suction surface is released, so the sheet material is placed at the position of the flat adhesive surface corresponding to the predetermined position of the planar suction surface. Is maintained accurately.

  You may provide the pressurization process which pressurizes the surface of the sheet material affixed on the said to-be-adhered thing after the said sticking process.

  According to the above method, in the pressurizing step, the surface of the sheet material adhered to the object to be pasted in the pasting step is pressurized, so that air bubbles are generated at the pasting interface between the sheet material and the pasting object after the pasting step. Even if is mixed, the bubbles can be removed by pressurizing the surface of the sheet material.

  The sheet sticking apparatus according to the present invention includes a processing chamber capable of maintaining the inside in a reduced-pressure atmosphere, and a sticking object holding unit provided in the processing chamber and having a holding surface for holding a flat plate-like sticking object. And an adhesive surface that is provided inside the processing chamber and holds the sheet material in a flat shape, and the adhesive surface approaches or separates in a state of facing the holding surface of the pasted article holding portion. A sheet material holding portion that is movable, and the sheet material holding portion is brought close to the holding surface of the object to be stuck holding portion while maintaining the inside of the processing chamber in a reduced pressure atmosphere. The sheet material held by the material holding part and the adherend held by the adherend holding part are configured to be in close contact with each other.

  According to said structure, when a sheet material is affixed on a flat-plate-shaped to-be-adhered object, the sheet | seat material currently hold | maintained flat by the adhesive surface of a sheet material holding | maintenance part inside a processing chamber, and a to-be-attached object After the objects to be stuck held on the holding surface of the holding part face each other, the object to be stuck was held in the sheet material holding part where the sheet material was held in a state where the inside of the processing chamber was maintained in a reduced pressure atmosphere. By approaching the holding surface of the sticking object holding part, the sheet material held in the sheet material holding part and the sticking object held in the sticking object holding part are brought into close contact with each other. The objects are bonded to each other with the entire surface uniformly adhered, and the occurrence of concave distortion in the sheet material is suppressed, and the mixing of bubbles at the bonding interface between the sheet material and the object to be bonded is suppressed. Thereby, since generation | occurrence | production of the defect of an external appearance is suppressed, generation | occurrence | production of the external appearance defect is suppressed and a sheet | seat material is affixed on a flat-shaped to-be-adhered thing.

  A first positioning pin for positioning the object to be adhered and a second positioning pin for positioning the sheet material holding part are provided on the object holding part to hold the sheet material with respect to a holding surface of the object holding part. It may be provided so as to be pulled in as the part approaches.

  According to said structure, it is comprised so that the 1st positioning pin and the 2nd positioning pin provided in the to-be-attached article holding part may be drawn in according to the approach of the sheet material holding part with respect to the holding surface of the to-be-attached article holding part. Therefore, while the sheet material holding part is separated from the holding surface of the sticking object holding part, the sticking object is positioned at a predetermined position of the holding face by the first positioning pin, and the second positioning is performed. While the sheet material holding part is positioned with respect to the object holding part by the pin and the sheet material holding part is approaching the holding surface of the object holding part, the first positioning pin and the second pin When the positioning pin is pulled in and the sheet material held on the adhesive surface of the sheet material holding part is in close contact with the object to be held held on the holding surface of the object holding part, the sheet material is accurately attached to the object to be stuck. It is pasted.

  An adhesive rubber may be provided on the adhesive surface of the sheet material holding portion.

  According to the above configuration, since the adhesive rubber is provided on the adhesive surface of the sheet material holding portion, for example, the adhesive surface of the sheet material holding portion is specifically configured by the surface of the adhesive rubber such as silicone rubber. The

  According to the present invention, the sheet material held on the flat adhesive surface is brought into close contact with the flat plate-like object in a reduced-pressure atmosphere. Sheet material can be affixed to.

It is a section schematic diagram showing typically the sheet sticking device concerning the embodiment of the present invention. It is a side view of the sheet material temporary holding jig concerning the embodiment of the present invention. It is a 1st top view of a sheet material temporary holding jig concerning an embodiment of the present invention. It is a 2nd top view of the sheet material temporary holding jig concerning the embodiment of the present invention. It is a section schematic diagram showing typically a part of sheet material holding part which constitutes a sheet sticking device concerning an embodiment of the present invention, and a sticking object holding part. It is the 1st top view of the sticking object holding part which constitutes the sheet sticking device concerning the embodiment of the present invention. It is a 2nd top view of the sticking object holding part which comprises the sheet sticking apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments.

  FIG. 1 is a schematic cross-sectional view schematically showing the internal structure of the sheet sticking apparatus 50 of the present embodiment. FIG. 2 is a side view of the sheet material temporary holding jig 60 for temporarily holding the sheet material 5 to be pasted by the sheet pasting apparatus 50 of the present embodiment. FIG. 3 is a first plan view of the sheet material temporary holding jig 60. FIG. 4 is a second plan view of the sheet material temporary holding jig 60 in which the sheet material 5 and the holding plate 31 are held. FIG. 5 is a schematic cross-sectional view schematically showing a part of the sheet material holding unit 30 and the adherend holding unit 20 constituting the sheet pasting device 50. FIG. 6 is a first plan view of the object holding part 20. FIG. 7 is a second plan view of the object holding unit 20 where the object 6 and the holding plate 31 are held.

  As shown in FIG. 1, the sheet sticking apparatus 50 is provided in a metal processing chamber 10, a sticking object holding unit 20 provided on a bottom surface inside the processing chamber 10, and a processing chamber 10. And a sheet material holding unit 30 arranged on the upper side of the patch holding unit 20 in the figure.

  The processing chamber 10 is connected to, for example, a vacuum pump (not shown), and the inside thereof can be maintained in a reduced pressure atmosphere having a predetermined degree of vacuum. Further, as shown in FIG. 1, the processing chamber 10 is provided with a through hole in the upper wall in the drawing, and an O-ring 11 for maintaining a reduced pressure atmosphere is attached to the through hole via a pressing rod 35 described later. ing.

  As shown in FIGS. 1 and 5 to 7, the adherend holding unit 20 includes a metal stage 21 having a flat holding surface Sh that holds a flat plate-like object 6 and holding of the stage 21. A plurality of resin-made first positioning pins 22 provided along the periphery of the surface Sh, and a plurality of resin-made first positioning pins 22 provided outside the first positioning pins 22 along the periphery of the holding surface Sh of the stage 21. And a second positioning pin 23.

  As shown in FIGS. 1 and 5 to 7, the first positioning pins 22 are formed lower than the second positioning pins 23 so as to contact the edge of the object 6 and position the object 6 to be adhered. It is configured.

  As shown in FIGS. 1 and 5 to 7, the second positioning pin 23 is formed higher than the first positioning pin 22, and contacts the edge of a holding plate 31 described later to position the sheet material holding portion 30. Is configured to do. Further, as shown in FIGS. 1 and 5, the second positioning pin 23 includes a portion having a relatively small diameter at the upper portion in the drawing, and a portion having a relatively large diameter at the lower side in the drawing as compared with the small portion. There is a step between them.

  As shown in FIGS. 1 and 5, the first positioning pin 22 and the second positioning pin 23 are usually provided by the spring B (when the sheet material holding portion 30 is separated from the holding surface Sh of the stage 21). It protrudes upward (relatively high) in the figure, and is configured to be pulled in (appropriately protrude relatively low) as the sheet material holding portion 30 approaches the holding surface Sh of the stage 21.

  As shown in FIGS. 1 and 5, the sheet material holding unit 30 includes a metal holding plate 31, an adhesive rubber 32 provided on the lower surface of the holding plate 31 in the drawing, and an upper surface of the holding plate 31 in the drawing. A processing chamber includes a pressing rubber 33 provided so as to abut, a metal pressing plate 34 bonded to the upper surface of the pressing rubber 33 in the drawing, and a pressing rod 35 attached to the pressing plate 34. 10, the holding plate 31 is configured to approach or separate in a state of facing the holding surface Sh of the object holding unit 20 by inserting and removing the holding rod 35.

  As shown in FIG. 4, the holding plate 31 is provided with a through hole H and a notch C so that a first positioning pin 52 to be described later does not become a physical obstacle.

  The adhesive rubber 32 has an adhesive surface Sa that holds the sheet material 5 in a flat shape, and is made of, for example, silicone rubber having a durometer type A hardness of 20 according to JIS K6253.

  The pressing rubber 33 is made of, for example, urethane rubber having a durometer type A hardness of 70.

  The sheet sticking apparatus 50 configured as described above allows the sheet material holding unit 30 to approach the holding surface Sh of the adherend holding unit 20 in a state where the inside of the processing chamber 10 is maintained in a reduced pressure atmosphere. The sheet material 5 held by 30 and the adherend 6 held by the adherend holding unit 20 are brought into close contact with each other, and the sheet material 5 and the adherend 6 are bonded together.

  Here, the sheet material temporary holding jig 60 for holding the sheet material 5 on the holding plate 31 will be described.

  As shown in FIGS. 2 to 4, the sheet material temporary holding jig 60 has a metal stage 51 having a flat suction surface Sv for holding the sheet material 5, and the periphery of the suction surface Sv of the stage 51. A plurality of first positioning pins 52 made of resin and a plurality of second positioning pins 53 made of resin provided outside the first positioning pins 52 along the periphery of the suction surface Sv of the stage 51; It has.

  The suction surface Sv is provided with a plurality of suction holes (not shown) each configured to exhaust, for example, when performing vacuum suction.

  As shown in FIGS. 2 to 4, the first positioning pin 52 is formed lower than the second positioning pin 53, and is configured to contact the edge of the sheet material 5 to position the sheet material 5. .

  The second positioning pins 53 are formed higher than the first positioning pins 52 as shown in FIGS. 2 to 4, and are in contact with the end edges of the holding plate 31, the through holes H, and the side surfaces of the notches C. In addition to positioning 31, the surface of the sheet material 5 held on the suction surface Sv in a state where the holding plate 31 is positioned is configured to contact via the adhesive rubber 32.

  Next, the sheet sticking method for sticking the sheet material 5 to the flat part 6 to be stuck using the sheet sticking apparatus 50 and the sheet material temporary holding jig 60 will be described. In addition, the sheet sticking method of this embodiment includes a sheet material holding step, an adherend holding step, a sticking step, and a pressing step.

  Here, the sheet material 5 is, for example, an optically colorless and transparent double-sided tape having a thickness of about 175 μm, a scattering prevention film having a thickness of about 220 μm, an antireflection film having a thickness of about 100 μm, and a thickness of 0.05 mm to 0.00. For example, an ultra-thin touch sensor glass of about 1 mm.

  The adherend 6 is, for example, a liquid crystal display panel having a thickness of about 1.35 mm, an organic EL (electroluminescence) display panel, a cover glass having a thickness of about 0.7 mm of a display screen of a mobile phone, or the like.

<Sheet material holding process>
First, after the sheet material 5 is positioned by the first positioning pins 52 on the suction surface Sv of the stage 51 constituting the sheet material temporary holding jig 60, vacuum suction is performed on the suction surface Sv, as shown in FIG. The sheet material 5 is temporarily held at a predetermined position on the suction surface Sv.

  Subsequently, the second positioning pin 53 is used to bring the adhesive surface Sa of the adhesive rubber 32 provided on the holding plate 31 into contact with the surface of the sheet material 5 once held on the adsorption surface Sv, and then adsorb By releasing the vacuum suction on the surface Sv, the sheet material 5 is held on the flat adhesive surface Sa.

<Plate holding process>
Using the first positioning pins 22, the adherend 6 is held on the planar holding surface Sh of the stage 21 constituting the adherend holding portion 20.

<Paste process>
First, as shown in FIG. 5, in the step of holding the sheet material on the stepped portion at the top of the second positioning pin 23 provided on the stage 21 on which the object 6 is held in the object holding process, the sheet material holding process. By abutting the edge of the holding plate 31 holding the sheet material 5, the sheet material 5 held by the holding plate 31 and the object 6 to be attached held by the object holding part 20 are opposed to each other. .

  Subsequently, after maintaining the inside of the processing chamber 10 in a reduced-pressure atmosphere (for example, a degree of vacuum of about 20 Pa), the sheet material 5 held on the holding plate 31 is lowered by lowering the pressing rod 35 as shown in FIG. And the to-be-attached object 6 hold | maintained at the to-be-attached object holding | maintenance part 20 is stuck, making it mutually oppose, and the sheet | seat material 5 is affixed on the to-be-attached object 6. FIG.

<Pressurization process>
By pressing the surfaces of the sheet material 5 and the object to be bonded 6 bonded in the bonding process, for example, at 35 ° C., 0.5 MPa, about 15 minutes using an autoclave, the sheet material 5 and the object to be bonded are applied. 6. Remove bubbles at the sticking interface.

  As described above, according to the sheet sticking apparatus 50 and the sheet sticking method of the present embodiment, in the sticking step, the sheet material 5 held on the planar adhesive surface Sa of the sheet holding unit 30 in the sheet material holding step, and In the state where the inside of the processing chamber 10 is maintained in a reduced-pressure atmosphere after the flat plate-like objects 6 held on the flat holding surface Sh of the object-to-be-attached object holding portion 20 are opposed to each other in the object-to-be-attached object holding step. By bringing the sheet material holding part 30 holding the sheet material 5 close to the holding surface Sh of the object holding part 20 where the object 6 is held, the sheet material 5 and the object 6 are opposed to each other. Since the sheet material 5 and the adherend 6 are adhered to each other in a state of being uniformly adhered over the entire surface, it is possible to suppress the occurrence of concave distortion in the sheet material 5, It is possible to suppress the mixing of air bubbles at the adhered interface over preparative member 5 and the attached material 6. Thereby, since generation | occurrence | production of the defect of an external appearance is suppressed, generation | occurrence | production of the external appearance defect can be suppressed and the sheet | seat material 5 can be affixed on the flat-shaped to-be-adhered object 6. FIG.

  Further, according to the sheet sticking method of the present embodiment, in the sheet material holding step, the sheet material 5 is placed at a predetermined position on the planar suction surface Sv by vacuum suction using a plurality of suction holes formed on the suction surface Sv. Once held, the flat adhesive surface Sa is brought into contact with the surface of the temporarily held sheet material 5, and then the holding on the suction surface Sv is released, so that it corresponds to a predetermined position on the planar suction surface Sv. The sheet material 5 can be accurately held at the position of the flat adhesive surface Sa.

  Moreover, according to the sheet sticking method of this embodiment, in the pressurizing step, the surface of the sheet material 5 attached to the adherend 6 in the sticking step is pressurized, so the sheet material 5 after the sticking step is performed. Even if air bubbles are mixed in the pasting interface of the article 6 to be pasted, the air bubbles can be removed by pressurizing the surface of the sheet material 5.

  Further, according to the sheet sticking device 50 of the present embodiment, the first positioning pin 22 and the second positioning pin 23 provided on the sticking object holding unit 20 hold the sheet material on the holding surface Sh of the sticking object holding part 20. Since the sheet material holding part 30 is separated from the holding surface Sh of the adherend holding part 20, the holding surface is held by the first positioning pins 22 because the sheet material holding part 30 is separated from the holding surface Sh of the adherend holding part 20. The object 6 can be positioned at a predetermined position of Sh, and the sheet material holder 30 can be positioned with respect to the object holder 20 by the second positioning pins 23. While the sheet material holding unit 30 is approaching the holding surface Sh of the holding unit 20, the first positioning pins 22 and the second positioning pins 23 are pulled into the holding surface Sh of the object holding unit 20. By sheet 5 held on the adhesive surface Sa of the sheet material holding portion 30 to be attached material 6 which is lifting is in close contact, can be attached accurately the sheet material 5 to be attached material 6.

  In addition, in this embodiment, although the sheet sticking method which performs a pressurization process after a sticking process was illustrated, this invention is applicable also to the sheet sticking method by which the pressurization process was abbreviate | omitted.

  As described above, the present invention can suppress the occurrence of defects in appearance and can paste a sheet material on a flat plate-like object, so that a flexible sheet material is stuck on a flat surface. It is useful for the entire technology.

Sa Adhesive surface Sh Holding surface Sv Adsorption surface 5 Sheet material 6 Sticking object 10 Processing chamber 20 Sticking object holding part 22 First positioning pin 23 Second positioning pin 30 Sheet material holding part 32 Adhesive rubber

Claims (6)

A sheet material holding step for holding the sheet material on a flat adhesive surface;
An object holding step for holding a flat plate-like object on a flat holding surface;
After the held sheet material and the held object to be adhered are opposed to each other, the sheet material and the object to be adhered are brought into close contact with each other in a reduced-pressure atmosphere, whereby the sheet material is attached to the object to be adhered. A sheet pasting method comprising: a pasting step for pasting. In the sheet sticking method according to claim 1,
In the sheet material holding step, the sheet material is temporarily held at a predetermined position on the flat suction surface, and the adhesive surface is brought into contact with the surface of the once held sheet material, and then the holding on the suction surface is performed. The sheet sticking method characterized by canceling. In the sheet sticking method according to claim 1 or 2,
A sheet pasting method comprising a pressurizing step of pressurizing a surface of a sheet material pasted on the adherend after the pasting step. A processing chamber capable of maintaining the interior in a reduced-pressure atmosphere;
An adherend holding part provided inside the processing chamber and having a holding surface for holding a flat plate-like object;
It has an adhesive surface that is provided inside the processing chamber and holds the sheet material in a flat shape, and moves so that the adhesive surface approaches or separates in a state of facing the holding surface of the adherend holding part. A possible sheet material holding part,
By bringing the sheet material holding part closer to the holding surface of the object holding part while maintaining the inside of the processing chamber in a reduced pressure atmosphere, the sheet material held by the sheet material holding part and the object to be covered A sheet affixing device, wherein the affixed objects held in the affixed object holding unit are configured to adhere to each other. In the sheet sticking device according to claim 4,
A first positioning pin for positioning the object to be adhered and a second positioning pin for positioning the sheet material holding part are provided on the object holding part to hold the sheet material with respect to a holding surface of the object holding part. A sheet sticking device, wherein the sheet sticking device is provided so as to be retracted in accordance with the approach of the part. In the sheet sticking device according to claim 4 or 5,
A sheet sticking apparatus, wherein an adhesive rubber is provided on an adhesive surface of the sheet material holding portion.

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