CN108906409B

CN108906409B - Coating device, coating method and bonding method

Info

Publication number: CN108906409B
Application number: CN201810966356.9A
Authority: CN
Inventors: 郭南村; 朱文宾
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2020-12-22
Anticipated expiration: 2038-08-23
Also published as: CN108906409A

Abstract

The invention relates to a coating device, a coating method and a bonding method, wherein the coating device is used for coating glue on a bonding surface of a bonding panel, the bonding surface comprises a bonding area and a blocking area surrounding the bonding area, the edge line of the blocking area comprises a special-shaped section, and the coating device comprises: the mounting frame can move along a first direction; the first nozzle is arranged on the mounting rack and can move along the first direction under the driving of the mounting rack so as to form a bonding adhesive section in the bonding area; and the second nozzle is arranged on the mounting frame and positioned outside the first nozzle, the second nozzle can move along a second direction to be close to or far away from the first nozzle, and the second direction is intersected with the first direction. The invention finishes coating the bonding area and the blocking area of the bonding panel by one-time coating, simplifies the coating process and increases the production benefit.

Description

Coating device, coating method and bonding method

Technical Field

The invention relates to the field of panel mounting, in particular to a coating device, a coating method and a bonding method.

Background

The attaching mode of the touch screen mainly comprises frame attaching and full attaching. The frame sticker is also called as a Chinese character 'kou' sticker, namely the touch screen and the four sides of the display screen are simply fixed by the double faced adhesive tape, and an air layer exists between the display screen and the touch screen. The full-lamination technology is to completely adhere the display screen and the touch screen together seamlessly by using OCR (aqueous adhesive) or OCA (optical adhesive). Therefore, compared with the frame paste, the full-lamination has higher light transmittance and stability.

In the full-lamination process, a coating process is required in advance, and for a panel with a regular outline (such as a rectangular panel), a coating process such as full-plane or frame glue coating can be adopted. However, for the panel with the irregular contour (such as a rectangular panel with arc corners), the conventional coating process is generally performed by two needle valve dispensing or one needle valve dispensing and one slit coating, and the coating process is complicated and is not favorable for improving the coating efficiency of the panel with the irregular contour.

Disclosure of Invention

Accordingly, it is necessary to provide a coating apparatus, a coating method and a bonding method for solving the problem of low coating efficiency of the profiled panel.

The utility model provides a coating device for coating glue on the binding face of laminating panel, the binding face is including laminating district and encircleing the separation district in laminating district, the sideline of separation district includes special-shaped section, coating device includes:

the mounting frame can move along a first direction;

the first nozzle is arranged on the mounting rack and can move along the first direction under the driving of the mounting rack so as to form a bonding adhesive section in the bonding area; and

the second nozzle is arranged on the mounting frame and located on the outer side of the first nozzle, the second nozzle can move in the second direction to be close to or far away from the first nozzle, the second direction is intersected with the first direction, when the mounting frame moves in the first direction, the second nozzle can move in the second direction, and the blocking area forms a special-shaped rubber section with the special-shaped section in a shape consistent with the special-shaped section.

In one embodiment, the number of the first nozzles is multiple, the multiple first nozzles are arranged at intervals along the second direction, and the second nozzles are located in the arrangement direction of the multiple first nozzles.

In one embodiment, the number of the second nozzles is two, and the two second nozzles are respectively located at two ends of the whole formed by the plurality of first nozzles.

In one embodiment, the first nozzle and the second nozzle are movable relative to the mounting frame along a third direction to approach or separate from the attaching surface of the attaching panel, and the first direction, the second direction and the third direction are perpendicular to each other.

In one embodiment, the mounting is further movable in the second direction.

In one embodiment, the first nozzle is movable in the second direction to approach or separate from the second nozzle.

Meanwhile, the invention also provides a coating method, which comprises the following steps:

providing a laminating panel, wherein a laminating surface of the laminating panel comprises a laminating area and a blocking area surrounding the laminating area, and a side line of the blocking area comprises a special-shaped section;

providing the coating device; and

and controlling the mounting rack to move along the first direction, coating the first nozzle on the bonding area to form a bonding adhesive section, and simultaneously, coating the second nozzle on the blocking area to form a special-shaped adhesive section with the same shape as the special-shaped section, wherein the second nozzle moves along the second direction.

In one embodiment, the sidelines of the attaching surface of the attaching panel comprise a first straight sideline and a second straight sideline which are opposite, and two opposite special-shaped sidelines, the special-shaped sidelines comprise the special-shaped section, and the first straight sideline and the second straight sideline are arranged at intervals along the first direction;

before the step of controlling the mount to move in the first direction, the coating method further includes the steps of: controlling the mounting rack to move along the second direction, wherein the second nozzle forms a first glue section corresponding to the first linear side line in the blocking area;

after the step of coating the attaching region by the first nozzle, the coating method further includes the steps of: and controlling the mounting rack to move along the second direction, wherein the second nozzle forms a second glue section corresponding to the second linear side line in the blocking area.

Meanwhile, the invention also provides a laminating method, which comprises the following steps:

providing a first panel, and gluing the first panel by adopting the coating method, wherein the first panel is the attaching panel in the coating method;

providing a second panel having a shape matching the shape of the conformable region of the first panel, placing the second panel on the conformable region of the first panel;

pressing the second panel and the first panel to enable the adhesive tape between the second panel and the first panel to be spread flatly to form a bonding layer between the second panel and the first panel; and

and curing the bonding layer in the attaching area.

In one embodiment, before the step of laminating the first panel and the second panel, the laminating method further includes the steps of:

and pre-curing the adhesive bonding section and the special-shaped adhesive section to obtain a semi-cured adhesive bonding section and a semi-cured special-shaped adhesive section.

The coating device, the coating method and the bonding method provided by the invention have the following advantages:

because the second nozzle activity in the coating device is located the outside of first nozzle, and the second nozzle can be close to or keep away from first nozzle to make the coating device when coating laminating panel (dysmorphism panel), the position of second nozzle on the mounting bracket can be adjusted according to the profile of dysmorphism section to the second nozzle, realizes the continuous coating of dysmorphism section. Meanwhile, in the coating process of the second nozzle, the first nozzle in the coating device can also continuously coat the joint area, so that the coating of the joint area and the blocking area of the joint panel can be finished through one-time coating, the coating process is simplified, and the production benefit is increased.

Drawings

FIG. 1 is a schematic structural diagram of a coating apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first panel;

FIG. 3 is a schematic view of the adhesive applied to the bonding surface of FIG. 2;

FIG. 4 is a flow chart of a bonding method according to an embodiment of the present invention;

FIG. 5 is a schematic view of the mounting frame moving in a second direction to apply the coating on the first panel;

FIG. 6 is a schematic view of the mounting frame moving in a first direction to apply the coating on the first panel;

fig. 7 is a schematic view of the mounting rack coated on the first panel in the second direction subsequent to fig. 6.

Fig. 8 is a schematic view illustrating the attachment of the first panel and the second panel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and fig. 2, the present invention provides a coating apparatus 100 for coating glue on a joint surface of a joint panel 200. The attachment panel 200 is a profiled panel, and the attachment surface of the attachment panel 200 includes an attachment area 210 and a blocking area 220 surrounding the attachment area 210, i.e., the attachment area 210 is located in a central region of the attachment surface of the attachment panel 200, and the blocking area 220 is located in a border region of the attachment surface of the attachment panel 200. The edge of the blocking zone 220 comprises a profiled section 221, i.e. the edge of the blocking zone 220 comprises a non-linear section.

The material of the glue can be, but is not limited to, acryl, polyurethane, silica gel, epoxy resin, and the like. The irregular segment 221 may be an arc segment or a broken line segment. Specifically, in the present embodiment, the irregular segment 221 is a circular arc segment.

The coating apparatus 100 includes a mounting block 110, a first nozzle 120, and a second nozzle 130. The first nozzle 120 is fixedly disposed on the mounting frame 110, and the second nozzle 130 is movably disposed on the mounting frame 110 and located outside the first nozzle 120. When the coating apparatus 100 coats glue on the attaching surface of the attaching panel 200, the first nozzle 120 is used for coating the attaching region 210, and the second nozzle 130 is used for coating the blocking region 220 (including the irregular section 221 in the blocking region 220).

In the present embodiment, the mounting bracket 110 is movable in the first direction X. The first nozzle 120 is fixedly disposed on the mounting frame 110, and the first nozzle 120 can be driven by the mounting frame 110 to move along the first direction X, so as to form a bonding adhesive segment 11 (refer to fig. 3) in the bonding region 210. The adhesive segment 11 may be a linear adhesive segment or a surface adhesive segment, when the adhesive segment 11 is a linear adhesive segment, the first nozzle 120 is a jet needle valve, and when the adhesive segment 11 is a surface adhesive segment, the first nozzle 120 is a slit coating die (the slit coating die is a tool used for coating liquid on the entire surface of the object). Specifically, in the present embodiment, the first nozzle 120 is a jet needle valve, and the bonding adhesive segment 11 is a linear adhesive segment. More specifically, in the present embodiment, the number of the first nozzles 120 is multiple, and the multiple first nozzles 120 are arranged at intervals along the second direction Y, so that multiple bonding adhesive segments 11 arranged at intervals in parallel can be formed in the bonding region 210 at the same time.

The second nozzle 130 is movably disposed on the mounting frame 110 and located outside the first nozzle 120, the second nozzle 130 can move along a second direction Y to be close to or far away from the first nozzle 120, and the second direction Y intersects with the first direction X. Specifically, in the present embodiment, the first direction X is perpendicular to the second direction Y. Wherein, while the mounting frame 110 moves along the first direction X, the second nozzle 130 can move along the second direction Y to form the shaped adhesive segment 12 (refer to fig. 3) in the blocking area 220 in accordance with the shape of the shaped segment 221. When the mounting frame 110 moves along the first direction X and the second nozzle 130 is fixed relative to the mounting frame 110, that is, the second nozzle 130 does not move along the second direction Y, the strip-shaped adhesive section 13 (refer to fig. 3) may be formed in the blocking area 220. The second nozzle 130 may be an injection needle valve. Specifically, in the present embodiment, the number of the second nozzles 130 is two, and the two second nozzles 130 are respectively located at both ends of the whole body formed by the first nozzles 120.

In this embodiment, in order to realize the movement of the second nozzle 130, a slide rail 140 is further disposed on the mounting frame 110 outside the first nozzle 120. The slide rail 140 extends toward the second direction Y, and the second nozzle 130 is disposed in the slide rail 140. Specifically, in the present embodiment, the stroke of the slide rail 140 is equal to or greater than 100 mm. The coating apparatus 100 further includes a driver 150 disposed in the mounting frame 110, and the driver 150 is connected to the second nozzle 130 to realize the reciprocating sliding of the second nozzle 130 on the slide rail 140. The actuator 150 may be a stepping motor or a servo motor, and the actuator 150 may be a linear actuator having a ball screw mounted on a motor.

In the coating apparatus 100, since the second nozzle 130 of the coating apparatus 100 is movably disposed outside the first nozzle 120, the second nozzle 130 can move close to or away from the first nozzle 120, so that when the coating apparatus 100 coats on the application panel 200 (profiled panel), the second nozzle 130 can adjust the position of the second nozzle 130 on the mounting frame 110 according to the profile of the profiled section 221, thereby realizing continuous coating of the profiled section 221. Meanwhile, in the coating process of the second nozzle 130, the first nozzle 120 of the coating apparatus 100 can also continuously coat the bonding region 210, so that the bonding region 210 and the blocking region 220 of the bonding panel 200 can be coated by one-time coating, thereby simplifying the coating process and increasing the production efficiency.

In other embodiments, the first nozzle 120 can also move back and forth along the second direction Y relative to the second nozzle 130, wherein the first nozzle 120 moves along the second direction Y while the mounting frame 110 moves along the first direction X to form the shaped adhesive segment in the attaching region 210. In this way, the shaped adhesive segment formed in the attachment area 110 can increase the adhesive force between the first panel 100 and the second panel 300.

As shown in fig. 4, the present invention further provides a bonding method, which includes the steps of:

in step S10, a first panel 200, i.e., the above-mentioned attached panel 200, is provided. Referring to fig. 2, fig. 2 is a schematic structural diagram of a first panel 200 (a bonded panel 200), and the material of the first panel 200 may be, but is not limited to, glass, polymer, metal, and the like. The first panel 200 may be a polymer film such as polyethylene terephthalate (PET), Polyimide (PI), polyethylene naphthalate (PEN), or Polycarbonate (PC).

Specifically, in this embodiment, the border lines of the attachment surface of the first panel 200 include a first straight border line 201a and a second straight border line 201b that are opposite to each other, and two opposite special-shaped border lines 202, each special-shaped border line 202 includes the special-shaped section 221, and a third straight border line 203a and a fourth straight border line 203b that are disposed on two sides of the special-shaped section 221, and the first straight border line 201a and the second straight border line 201b are arranged at intervals along the first direction X. It is understood that in other embodiments, the shaped edge 202 may include only the shaped segment 221.

Step S20, as shown in fig. 3, glue is coated on the bonding area 210 of the first panel 200 to form a bonding glue segment 11, and glue is coated on the blocking area 220 of the first panel 200 to form an annular glue ring, where the annular glue ring includes at least one section of special-shaped glue segment 12. In this embodiment, cyclic annular rubber ring is squarely, and cyclic annular rubber ring is including relative first gluey section 14a and second gluey section 14b to and two relative special-shaped glue layers 15, and first gluey section 14a and second gluey section 14b are arranged along first direction X interval, and special-shaped glue layer 15 is including special-shaped gluey section 12 and locate the third of special-shaped gluey section 12 both sides and glue section 13a and fourth and glue section 13b, and section 13a is glued to the third and fourth and glue section 13b and form strip gluey section 13. It is understood that in other embodiments, the shaped adhesive layer 15 may include only the shaped adhesive segments 12.

With reference to fig. 5-7, the method for applying glue to the attachment region 210 and the barrier region 220 on the first panel 200 comprises the following steps:

step S21 provides the coating apparatus 100 described above. As shown in fig. 5, the coating apparatus 100 is placed above the first panel 200.

In step S22, please continue referring to fig. 5, the mounting frame 110 is controlled to move along the second direction Y, and the second nozzle 130 forms the first glue segment 14a corresponding to the first linear edge 201a in the blocking area 220.

Specifically, in the present embodiment, the first nozzle 120 and the second nozzle 130 can both move along the third direction Z to approach or separate from the attaching surface of the first panel 200. The first direction, the second direction and the third direction are pairwise vertical. The second nozzle 130 includes a first movable nozzle 130a and a second movable nozzle 130b located at two sides of the first nozzle 120, and when the mounting frame 110 moves along the second direction Y, the first movable nozzle 130a extends along the third direction Z to be close to the attaching surface of the first panel 200, and a first glue segment 14a corresponding to the first straight edge 201a is formed in the blocking area 220. Thus, the first nozzle 120 can be prevented from interfering with the coating operation of the second nozzle 130.

Step S23, referring to fig. 6, the mounting frame 110 is controlled to move along the first direction X, the first nozzle 120 coats and forms the adhesive segment 11 on the adhesive region 210, and simultaneously, the second nozzle 130 moves along the second direction Y and coats the shaped adhesive segment 12 having the same shape as the shaped segment 221 on the blocking region 220.

Specifically, in the present embodiment, when the mounting frame 110 moves along the first direction X, the first nozzles 120 and the second movable nozzles 130b extend along the third direction Z, that is, all of the first nozzles 120 and the second nozzles 130 extend along the third direction Z.

In step S24, referring to fig. 7, the mounting frame 110 is controlled to move along the second direction Y, and the second nozzle 130 forms the second glue segment 14b corresponding to the second linear edge 201b in the blocking area 220.

Specifically, in the present embodiment, when the mounting frame 110 moves along the second direction Y, the first nozzle 120 and the second movable nozzle 130b retract along the third direction Z, and the unretracted first movable nozzle 130a forms the second glue segment 14b corresponding to the second linear edge 201b in the blocking area 220.

It is understood that in other embodiments, the first nozzle 120 and the first movable nozzle 130a are retracted along the third direction Z, and the second movable nozzle 130b, which is not retracted, forms the second glue segment 14 corresponding to the second linear edge 201b in the blocking zone 220. At this time, the direction in which the mount 110 moves in the second direction Y is reversed.

In a specific embodiment, the irregular segment 221 of the first panel 200 is a circular arc segment, and the radius of the circular arc segment is greater than or equal to 1 mm. The thickness of the first panel 200 has a value in the range of 0.2-10 mm. The glue coated on the blocking region 220 has a viscosity ranging from 500cps to 20000 cps. The glue coated on the barrier region 120 forms a spacer layer, the width of the spacer layer is less than or equal to 0.5mm, and the aspect ratio is greater than 0.2. The first nozzles 120 are injection type needle valves, and the number is 3-5. The number of the second nozzles 130 is 2 and is respectively provided at both sides of the first nozzle 120, and the diameter of the cylinder inside the needle valve ranges from 5 to 50 mm.

Step S30, precuring the adhesive tape sections in the bonding region 210 and the blocking region 220 to obtain semi-cured adhesive tapes in the bonding region 210 and the blocking region 220. The method of pre-curing may be selected specifically depending on the nature of the glue used for the glue segments. For example, when the glue for the glue segment is a photo-curing glue, the glue segment can be pre-cured in a light irradiation manner; when the glue used for the glue section is heat curing glue, the glue section can be pre-cured in a heating mode. The glue segment is pre-cured to obtain a semi-cured glue strip, so that glue forming the glue segment is prevented from flowing randomly in subsequent steps, and further, when the first panel 200 and the second panel 300 are aligned and attached, the semi-cured glue strip cannot be adhered to the second panel 300, the position of the second panel 300 cannot be adjusted, and accurate alignment between the first panel 200 and the second panel 300 in the subsequent steps is guaranteed. It is understood that in other embodiments, step S13, i.e., the step of pre-curing the adhesive segment, may be omitted.

In step S40, the second panel 300 is provided and the second panel 300 is placed on the attachment area 210 of the first panel 200. Referring to fig. 8, fig. 8 is a schematic view illustrating the attachment of the first panel 200 and the second panel 300, the shape of the second panel 300 is matched with the shape of the attachment area 210 of the first panel 200, that is, after the second panel 300 is attached to the attachment area 210 of the first panel 200, the semi-cured adhesive tape 15 located in the barrier area 220 is located at the periphery of the second panel 300 and surrounds the second panel 300, and the shape of the semi-cured adhesive tape 15 located in the barrier area 220 is the same as the outline of the second panel 300.

Step S50, the second panel 300 and the first panel 200 are pressed together, so that the semi-cured adhesive tape 16 between the second panel 300 and the first panel 200 is spread flat to form a semi-cured adhesive layer between the second panel 300 and the first panel 200.

Step S60, curing the semi-cured adhesive layer in the bonding region 210 to obtain a cured adhesive layer. Thus, the bonding firmness of the product obtained after the first panel 200 and the second panel 300 are attached can be ensured.

In this embodiment, the product obtained by attaching the first panel 200 and the second panel 300 is a touch module. At this time, when the first panel 200 is a glass cover, the corresponding second panel 300 is a touch panel or an in-cell touch display panel. In some embodiments, when the first panel 200 is a touch panel, the second panel 300 may be a display panel.

In the process of bonding the first panel 200 and the second panel 300, the extruded semi-cured adhesive tape 16 in the bonding region 210 diffuses to the periphery, and the semi-cured adhesive tape 15 in the barrier region 120 can block the outflow of the adhesive, so that the adhesive overflow phenomenon can be avoided. Thus, in the actual bonding process, the height of the semi-cured adhesive tape 16 in the bonding area 210 may be greater than the height of the semi-cured adhesive tape 15 in the barrier area 220, so as to ensure that the semi-cured adhesive tape 16 in the bonding area 210 can be sufficiently diffused, and increase the adhesive area between the first panel 200 and the second panel 300. Moreover, in order to ensure the blocking effect of the semi-cured adhesive tape 15 in the barrier area 220 on the semi-cured adhesive tape 16 in the bonding area 210 in the pressing step and avoid glue overflow, the viscosity of the semi-cured adhesive tape 15 in the barrier area 220 is greater than that of the semi-cured adhesive tape 16 in the bonding area 210.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a coating device for coating glue on the binding face of laminating panel, the laminating panel is glass apron or touch panel, the binding face is including laminating district and encircleing the separation district in laminating district, the sideline in separation district includes special-shaped section, its characterized in that, coating device includes:

a mounting frame movable in a first direction, the mounting frame further movable in a second direction, the second direction intersecting the first direction;

the second nozzles are arranged on the mounting frame, the number of the second nozzles is two, the two second nozzles are located on two sides of the first nozzle, and the second nozzles can move along a second direction to be close to or far away from the first nozzle, wherein when the mounting frame moves along the first direction, the second nozzles can move along the second direction to form a special-shaped rubber section with the shape consistent with that of the special-shaped section in the blocking area;

the height value of the gluing section formed by the first nozzle in the gluing area is larger than the height value of the special-shaped gluing section formed by the second nozzle in the blocking area.

2. The coating apparatus according to claim 1, wherein the number of the first nozzles is plural, and plural first nozzles are arranged at intervals in the second direction and between two second nozzles, the second nozzles being arranged in the direction of arrangement of the plural first nozzles.

3. The coating apparatus of claim 1, wherein the first nozzle is a jet needle valve or a slot coating die.

4. The coating apparatus of claim 1, wherein the first nozzle and the second nozzle are each movable relative to the mounting frame in a third direction to approach or move away from the faying surface of the faying panel, the first direction, the second direction, and the third direction being perpendicular in pairs.

5. A coating apparatus as in claim 1, wherein said first nozzle is movable in said second direction to approach or move away from said second nozzle.

6. A method of coating, comprising the steps of:

providing a coating apparatus according to any one of claims 1 to 5; and

the mounting frame is controlled to move in the first direction, the first nozzle is coated on the bonding area and forms a bonding adhesive section, meanwhile, the second nozzle moves in the second direction, the blocking area is coated with an irregular adhesive section with the same shape as the irregular section, and the height value of the bonding adhesive section formed in the bonding area of the first nozzle is larger than that of the irregular adhesive section formed in the blocking area of the second nozzle.

7. The coating method according to claim 6, wherein the edges of the attaching surface of the attaching panel comprise a first straight edge and a second straight edge which are opposite to each other, and two opposite special-shaped edges which comprise the special-shaped section, and the first straight edge and the second straight edge are arranged at intervals along the first direction;

8. A bonding method is characterized by comprising the following steps:

providing a first panel, and gluing the first panel by using the coating method according to claim 6 or 7, wherein the first panel is the laminated panel in the coating method;

precuring the adhesive section and the special-shaped adhesive section to obtain an adhesive tape;

and curing the bonding layer in the attaching area.