CN114798314B - Gluing jig and gluing method - Google Patents
Gluing jig and gluing method Download PDFInfo
- Publication number
- CN114798314B CN114798314B CN202210389590.6A CN202210389590A CN114798314B CN 114798314 B CN114798314 B CN 114798314B CN 202210389590 A CN202210389590 A CN 202210389590A CN 114798314 B CN114798314 B CN 114798314B
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- Prior art keywords
- groove body
- glue
- colloid
- tank
- glued
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Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004026 adhesive bonding Methods 0.000 title claims abstract description 40
- 239000003292 glue Substances 0.000 claims abstract description 139
- 239000000084 colloidal system Substances 0.000 claims abstract description 96
- 238000007790 scraping Methods 0.000 claims abstract description 51
- 238000003892 spreading Methods 0.000 claims abstract description 51
- 238000000576 coating method Methods 0.000 claims description 46
- 239000011248 coating agent Substances 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 27
- 238000005452 bending Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000010073 coating (rubber) Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 17
- 230000007935 neutral effect Effects 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 12
- 239000011148 porous material Substances 0.000 description 11
- 239000012790 adhesive layer Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012939 laminating adhesive Substances 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
Landscapes
- Coating Apparatus (AREA)
Abstract
The application discloses a gluing jig and a gluing method, wherein the gluing jig comprises a tubular groove body and a scraping plate; the groove body comprises a first end and a second end which are oppositely arranged, and the first end and the second end are provided with non-closed ports; the end face of the first end of the groove body is used for contacting with a piece to be glued so that the side wall of the groove body and the piece to be glued form an accommodating space for accommodating colloid; the scraping plate is used for sliding and overlapping the second end of the groove body and scraping off redundant part of colloid. The glue spreading jig is used for spreading glue on the glue spreading area of the glue spreading part waiting for the display screen, glue is injected into the accommodating space formed by the side wall of the groove body and the glue spreading part waiting for the glue spreading, and the redundant part of glue is scraped by the scraping plate, so that the thickness of the glue layer formed on the glue spreading area of the glue spreading part waiting for the display screen is uniform.
Description
Technical Field
The application relates to the technical field of production and manufacturing, in particular to a gluing jig and a gluing method.
Background
At present, in order to pursue the screen occupation ratio, the design of products such as mobile phones/wearing and the like realizes the comprehensive screen effect, and the non-display area of the screen body can be bent, so that the size of the lower frame of the screen body is reduced as much as possible.
However, the scheme of bending the non-display area of the screen body has some disadvantages: the outer surface tension stress exists in the area of the screen body bending, the inner surface is stressed in compression, and the metal wires (namely the twisted wires) in the bending area of the screen body are very easy to crack due to the stress action in the bending process, so that abnormal display occurs after the bonding pad is bent (Pad Bending).
In order to reduce the stress of the inner metal wire in the bending region of the screen body as far as possible, the upper surface of the bending region of the screen body is coated with protective adhesive (BPL) according to the prior design scheme, and the metal wire is positioned on the neutral layer of the bending region by adjusting the thickness of the protective adhesive. However, the current coating of protective glue generally adopts point-shaped glue spreading, and the point-shaped glue spreading forms a glue surface, so that the situation that the glue spreading is insufficient and uneven is caused, the thickness of the glue is uneven, the neutral layer of a bending area is deviated, and the protective effect of the protective glue on the metal wire is affected.
Disclosure of Invention
The gluing jig and the gluing method provided by the application solve the technical problem of uneven thickness of colloid generated in the process of coating protective colloid in the prior art.
In order to solve the technical problems, the first technical scheme provided by the application is as follows: providing a gluing jig, which comprises a tubular groove body and a scraping plate; the groove body comprises a first end and a second end which are oppositely arranged; the first end and the second end are provided with non-closed ports, and the end face of the first end of the groove body is used for being contacted with a piece to be glued so that the side wall of the groove body and the piece to be glued form an accommodating space for accommodating colloid; the scraping plate is used for sliding and overlapping the second end of the groove body and scraping off redundant part of colloid.
In one embodiment, the end face of the first end of the tank body is provided with a first hole; the tank body is provided with an air suction hole; an air suction channel is arranged in the side wall of the tank body, and the air suction channel is used for communicating the air suction hole with the first hole; the air extraction hole is used for connecting a vacuumizing device so that the end face of the first end of the groove body is adsorbed with the piece to be glued.
In one embodiment, the tank includes a tank body and a dense coating; the material of the tank body is porous material; the dense coating covers the surface of the tank body except the end face of the first end and the area where the air suction holes are located;
Or the groove body is a compact substrate.
In one embodiment, the device further comprises a heating element, which is arranged on the tank body and is used for heating the colloid;
Preferably, the heating element is arranged in the side wall of the tank body or the heating element is arranged on the outer surface of the side wall of the tank body;
Preferably, the heating elements are uniformly distributed along the circumferential direction of the tank body, and the heating elements are uniformly distributed along the height direction of the tank body.
In one embodiment, the inner surface of the side wall of the tank body is provided with a first anti-sticking coating; the surface of the scraping plate, which is used for being contacted with the colloid, is provided with a second anti-sticking coating;
preferably, the first release coating covers the entire inner surface of the channel; the second release coating covers the entire outer surface of the squeegee.
In one embodiment, the scraper includes a first end surface for contacting the gel; the first end face is a smooth plane and is parallel to the end face of the first end of the groove body;
Preferably, the scraping plate further comprises a first side surface and a second side surface which are oppositely arranged, and the first end surface is connected with the first side surface and the second side surface; the first side surface and the second side surface are smooth planes;
Preferably, the scraping plate is made of metal, glass or silicon wafer.
In one embodiment, the first side and/or the second side are provided with a plurality of blind holes; the blind holes are used for accommodating at least part of the excessive colloid scraped by the scraper;
preferably, the scraper further comprises a second end surface opposite to the first end surface, and the distance between the blind hole and the first end surface of the scraper is smaller than the distance between the blind hole and the second end surface of the scraper.
In one embodiment, the end face of the second end of the groove body is provided with a step, the outer surface of the groove body points to the direction of the inner surface, the step has a descending trend relative to the end face of the first end, the step comprises a high-position surface and a low-position surface, and the scraping plate is used for being erected on the low-position surface of the step;
preferably, the step is provided along the circumferential direction of the groove body; the inner edge of the low position surface is the same as the size and shape of the port of the first end;
or, the inner surface of the second end of the groove body is provided with a sliding groove, the scraping plate is provided with a sliding block corresponding to the sliding groove, and the sliding block is arranged in the sliding groove in a sliding way;
or, the inner surface of the second end of the groove body is provided with a sliding rail, the scraping plate is provided with a clamping groove corresponding to the sliding rail, and the clamping groove is arranged on the sliding rail in a sliding way.
In order to solve the technical problems, a second technical scheme provided by the application is as follows: the gluing method adopting the gluing jig of any one of the above steps is provided, and comprises the following steps:
The method comprises the steps of arranging a groove body on the surface of a piece to be glued, wherein the end face of a first end of the groove body is abutted with the surface of the piece to be glued;
Injecting colloid into an accommodating space surrounded by the side wall of the groove body and the piece to be glued;
Scraping off the redundant colloid by adopting a scraper;
and solidifying the colloid on the piece to be glued.
In an embodiment, when the glue spreading fixture further includes a heating element, before the scraping of the surplus glue with the scraper, the glue spreading fixture further includes:
heating the colloid in the tank body through a heating element;
Preferably, the piece to be glued comprises a display screen, and the bendable region of the display screen is in the orthographic projection of the inner edge of the port of the first end of the groove body on the display screen.
The application has the beneficial effects that: compared with the prior art, the application discloses a gluing jig and a gluing method, wherein the gluing jig comprises a tubular groove body and a scraping plate; the groove body comprises a first end and a second end which are oppositely arranged, and the first end and the second end are provided with non-closed ports; the end face of the first end of the groove body is used for contacting with a piece to be glued so that the side wall of the groove body and the piece to be glued form an accommodating space for accommodating colloid; the scraping plate is used for sliding and overlapping the second end of the groove body and scraping off redundant part of colloid. The glue spreading jig is used for spreading glue on the glue spreading area of the glue spreading part waiting for the display screen, glue is injected into the accommodating space formed by the side wall of the groove body and the glue spreading part waiting for the glue spreading, and the redundant part of glue is scraped by the scraping plate, so that the thickness of the glue layer formed on the glue spreading area of the glue spreading part waiting for the display screen is uniform.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a glue spreading jig according to a first embodiment of the present application;
fig. 2 is a schematic diagram of an assembly structure of the gluing fixture and the piece to be glued provided in fig. 1;
fig. 3 is a schematic structural diagram of a scraper of the glue spreading jig provided in fig. 1;
FIG. 4 is a schematic view of a partial cross-sectional structure of a display screen;
Fig. 5 is a schematic structural diagram of a glue spreading jig according to a second embodiment of the present application;
fig. 6 is a schematic top view of a groove of the glue spreading jig provided in fig. 5;
Fig. 7 is a schematic structural diagram of a glue spreading jig according to a third embodiment of the present application;
Fig. 8 is a schematic structural diagram of a glue spreading jig according to a fourth embodiment of the present application;
Fig. 9 is a schematic structural diagram of a glue spreading jig according to a fifth embodiment of the present application;
fig. 10 is a method of applying glue provided by the first embodiment of the application;
Fig. 11 is a glue application method according to a second embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, interfaces, techniques, etc., in order to provide a thorough understanding of the present application.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may include at least one such feature, either explicitly or implicitly. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. The terms "comprising" and "having" and any variations thereof in embodiments of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The present application will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a glue spreading jig according to a first embodiment of the present application, fig. 2 is a schematic structural diagram of an assembly of the glue spreading jig and a piece to be glued provided in fig. 1, fig. 3 is a schematic structural diagram of a scraper of the glue spreading jig provided in fig. 1, and fig. 4 is a schematic partial cross-sectional structural diagram of a display screen.
The glue application jig 100 includes a tank 11. Optionally, the glue application jig 100 may also include a blade 12. The tank 11 may be a tubular tank. The tank 11 is used for accommodating the colloid. The tank body 11 includes a first end 111 and a second end 112 that are disposed opposite to each other, where the first end 111 and the second end 112 are provided with non-closed ports, and an end surface of the first end 111 of the tank body 11 is used for contacting with the piece 20 to be glued, so that a receiving space for receiving the glue is enclosed by a sidewall of the tank body 11 and the piece 20 to be glued. The scraper 12 is configured to slidingly engage the second end 112 of the tank 11, and scrape off the excess colloid.
It will be appreciated that the tank 11 comprises only tubular side walls and does not comprise top and bottom walls covering the receiving space of the tubular side walls, so that glue can be injected into the receiving space of the tank 11 through the ports of the second end 112 of the tank 11, and the glue of the receiving space of the tank 11 is in direct contact with the piece 20 to be glued through the ports of the first end 111 of the tank 11. The scraper 12 is overlapped with the second end 112 of the tank 11 at both ends along the direction perpendicular to the moving direction of the scraper 12 so as to scrape the whole surface of the colloid. For example, both ends of the scraper 12 are respectively overlapped on the opposite side walls of the tank 11.
In this embodiment, the end face of the second end 112 of the groove 11 is provided with a step a, which is directed from the outer surface of the groove 11 to the inner surface, and the step a is in a downward trend relative to the end face of the first end 111. Step a includes a low position surface a and a high position surface b, and blade 12 is configured to ride on low position surface a of step a. Preferably, the step a is provided along the circumferential direction of the groove body 11; the inner edge of the low position surface a of the step a is the same size and shape as the port of the first end 111. Blade 12 slides on the low position surface a of step a. The width of the portion of the lower position face a of the step a at the opposite ends in the moving direction of the blade 12 (the dimension in the direction along the outer surface of the tank 11 toward the inner surface) is greater than or equal to the thickness of the blade 12 in the first direction X, so that the blade 12 can be completely dislocated from the colloid of the accommodation space of the tank 11 without contact when moving to the both ends of the annular step. First direction X is parallel to the direction in which first side 121 of blade 12 points toward second side 122. The low position face a may be a plane. The end surface of the first end 111 of the slot 11 may be planar. The direction of movement of blade 12 may be parallel to first direction X.
The distance H between the end surface of the first end 111 of the tank 11 and the lower position surface a of the step a is designed to be the thickness of the glue layer required for the piece 20 to be glued. The height of injecting colloid into the accommodation space of the groove body 11 is higher than the low position surface a of the step A, but lower than the high position surface b of the step A, then the scraper 12 is made to move, redundant colloid is scraped in the advancing process of the scraper 12, residual gas in the colloid is extruded in the scraping process, so that the internal pores and bubbles of the colloid are eliminated or reduced, the thickness deviation of the colloid is reduced, the condition that the diffusion of the colloid is insufficient and uneven is avoided, the thickness precision of the colloid is ensured, the metal wire is ensured to be positioned in a neutral layer of a bending zone, stress cracking of the metal wire is avoided, abnormal display of a device is caused, and the reliability of the device is improved.
Blade 12 moves from one side of second end 112 of channel 11 to the opposite side, and during movement of blade 12, excess gel will be caught by blade 12 and pushed away and not flow behind blade 12. The dimension M of the blade 12 in the second direction Y may be larger than the dimension N of the cross section of the accommodation space of the groove 11 in the second direction Y. The second direction Y may be perpendicular to the direction of movement of blade 12. The second direction Y may be perpendicular to the direction Z in which the first end 111 of the tank 11 points to the second end 112. The cross section of the receiving space of the tank 11 may be perpendicular to the direction Z in which the first end 111 of the tank 11 points to the second end 112. The direction of movement of blade 12 may be perpendicular to direction Z in which first end 111 of channel 11 points toward second end 112.
The dimension M of the blade 12 in the second direction Y may be equal to the dimension of the inner edge of the high position face b of the groove 11 in the second direction Y. The two portions of the side surface between the high position surface b and the low position surface a that are opposite in the second direction Y correspond to the guide rails of the blade 12.
In one embodiment, the member to be glued 20 is a display screen. Referring to fig. 2 and 4, the display screen is a flexible display screen, and the display screen includes a bendable region 21 and first and second non-bending regions located at both sides of the bendable region. The outer surface of the display screen in the bendable region 21 is under tensile stress, the inner surface is under compressive stress, and the metal wires (not shown) in the bendable region 21 are very susceptible to cracking due to stress during bending. In order to avoid the stress of the metal wire of the bendable region 21 as much as possible, a protective adhesive 23 (BPL) is coated on the surface of the display screen located in the bendable region 21, and the thickness of the protective adhesive 23 is adjusted to enable the metal wire to be located on the neutral layer of the bendable region 21. However, if the coating of the protective glue 23 is performed by dot-shaped glue, the dot-shaped glue is spread to form a glue surface, and the glue is not spread sufficiently uniformly, resulting in uneven thickness of the glue, resulting in offset of the neutral layer of the bending region 21, and affecting the protective effect of the protective glue 23 on the metal wire. The specific structure of the display screen is not described herein, and reference may be made to the prior art. As shown in fig. 4, a support film 29, a composite adhesive tape 27 and a spacer 28 may be disposed between the first non-bent region and the second non-bent region of the bent display screen 20. The side of the first non-bending region away from the second non-bending region may be provided with a polarizer 26, a laminating adhesive 25, a cover plate 24, and the like.
In view of this, when the glue coating jig 100 provided by the present application is used to glue a glue coating waiting piece of a display screen, the port of the first end 111 of the tank 11 is precisely aligned with the glue coating waiting area of the glue coating waiting piece of the display screen, the glue is injected into the accommodating space surrounded by the side wall of the tank 11 and the glue coating waiting piece, the glue is deposited in the glue coating waiting area of the display screen under the action of gravity of the glue, and then the scraper 12 is used to scrape off the redundant glue. Compared with the mode of using point-shaped glue in the prior art, the glue surface is formed by point-shaped glue diffusion, the uneven diffusion easily causes uneven thickness, and the insufficient diffusion easily generates pores. The application can ensure the uniformity of the glue coating of the area to be glued of the display screen by utilizing the gravity action of the glue body, so that the thickness of the glue layer formed in the bending area of the display screen is uniform, the offset of the neutral layer in the bending area of the display screen is avoided, the metal wire in the bending area of the display screen is ensured to be positioned in the neutral layer in the bending area, the glue layer plays a good role in protecting the metal wire, the metal wire is prevented from being stressed to generate cracks in the bending process, and the reliability of the display screen is improved. Meanwhile, as the glue is injected, the glue surface is formed without diffusion, and other residues in the glue can be extruded out by the scraping plate 12 in the scraping process, pores are not easy to generate in the glue layer formed on the surface of the display screen, and external substances such as water/oxygen can be prevented from invading into metal wires in the bending area screen body through the pores, so that the reliability of the display screen is further ensured.
Wherein the colloid may be a protective colloid (BPL). The cross section (perpendicular to the direction Z) of the receiving space of the tank 11 is rectangular, for example rectangular or square. It will be appreciated that the shape of the cross section of the receiving space of the tank 11 is designed according to the shape, and is designed in cooperation with the shape of the area to be glued of the piece to be glued 20.
Further, an end surface of the first end 111 of the tank 11 is provided with a plurality of first holes (not shown). An air suction passage (not shown) is provided inside the side wall of the tank 11. The tank 11 is provided with an air suction hole 113. The air-extracting hole 113 may be formed on a sidewall of the tank 11, for example, on an outer surface of the sidewall of the tank 11, and the air-extracting hole 113 is used for connecting a vacuum-extracting device (not shown). The gluing jig can further comprise a vacuumizing device. The air suction channel is used for communicating the air suction holes 113 with the first holes, and vacuumizing is carried out through the vacuumizing device, so that the end face of the first end 111 of the groove body 11 is adsorbed with the to-be-glued piece 20, the glue is prevented from overflowing from the contact position between the groove body 11 and the to-be-glued piece 20 in the process of injecting the glue into the accommodating space of the groove body 11 or in the process of scraping redundant part of the glue by using the scraping plate 12, the glue is prevented from being coated on the area which is not to be glued outside the to-be-glued area of the display screen, and the waste of the glue is also reduced. It will be appreciated that during the vacuum process, the suction force needs to be controlled so as not to damage the piece 20 to be glued.
In one embodiment, the tank 11 includes a tank body (not shown) and a dense coating (not shown). The material of the tank body is porous material, such as silicon carbide and alumina; wherein, the porous material refers to a material with a network structure formed by mutually communicated or closed holes. The dense coating covers the surface of the tank body except the end face of the first end 111 and the area where the air extraction holes 113 are located. It will be appreciated that the body of the tank is formed of a porous material, and the side wall of the body of the tank has a plurality of micro-holes therein, which serve as the above-described air extraction passages. Because the surface of the tank body is also exposed with a plurality of micropores, the surface of the tank body except the end face (the end face of the first end 111) contacted with the piece 20 to be glued and the surface of the area of the air extraction hole 113 are covered by the dense coating, so that the inside of the annular side wall of the tank body 11 is vacuumized, the end face of the first end 111 of the tank body 11 can be tightly adsorbed with the piece 20 to be glued, and the overflow of the colloid from the gap between the jig and the screen body in the process of colloid injection and scraping is avoided.
In one embodiment, the tank 11 is a dense matrix. The interior of the side wall of the tank 11 has one or more of the above-described suction passages. Specifically, one or more air extraction passages may be formed inside the dense substrate by means of laser etching, and a plurality of first holes may be formed on the end face of the first end 111 of the tank 11, and the air extraction passages communicate the first holes with the air extraction holes 113.
Alternatively, a cavity (as a suction passage) may be provided in the side wall of the tank 11, and the suction hole 113 may be communicated with the first hole of the end face of the first end 111 of the tank 11 through the cavity.
The inner surface of the side wall of the tank 11 may be provided with a first anti-adhesion coating (not shown), so as to avoid that the tank 11 sticks away the glue when the tank 11 is removed after the glue application is completed, and the thickness of the glue layer on the piece 20 to be glued is abnormal or even falls off. That is, the inner surface of the tank 11 may be provided with a first anti-sticking coating, which facilitates the subsequent demolding of the colloid from the tank 11, and prevents the tank 11 from damaging the shape of the adhesive layer. When the tank body 11 includes a tank body and a dense coating layer, and the material of the tank body is a porous material, the first anti-sticking coating layer is provided on the surface of the dense coating layer. Preferably, the first release coating covers the entire inner surface of the channel 11. The inner surface of the groove body in the gluing jig, which is contacted with the colloid, is subjected to anti-sticking treatment, so that the colloid is prevented from being stuck when the gluing jig is taken out after gluing is completed.
The surface of the scraper 12 that contacts the glue may be provided with a second anti-adhesive coating (not shown), so as to avoid that the scraper 12 sticks away the glue when scraping off the excessive glue, and the glue thickness of the piece 20 to be glued is inconsistent. Preferably, the second release coating covers the entire outer surface of blade 12. The outer surface of the scraping plate is subjected to anti-sticking treatment, so that the abnormal thickness of BPL glue caused by adhesive glue is avoided.
It will be appreciated that when the member to be glued 20 is a display screen, by providing the first anti-adhesion coating on the inner surface of the tank 11, and providing the second anti-adhesion coating on the surface of the scraper 12 for contacting with the glue, the abnormal thickness of the glue layer on the member to be glued 20 is avoided, and the offset of the neutral layer of the bendable region 21 of the display screen due to the abnormal thickness is avoided.
Optionally, the first release coating and the second release coating are both teflon; the materials of the first release coating and the second release coating can be selected according to the needs, and can be released, and the embodiment of the invention is not limited to this.
Referring to fig. 2, the glue coating fixture 100 further includes a heating element 13, the heating element 13 is disposed on the tank 11, and the heating element 13 is used for heating the glue in the tank 11. By arranging the heating element 13, the bubble pressure in the colloid becomes larger and the volume becomes larger gradually along with the temperature rise, and meanwhile, the viscosity of the colloid is reduced, the fluidity of the colloid is enhanced, and the diffusion and overflow of gas in the colloid are facilitated.
When the piece 20 to be glued is a display screen, compared with the mode of using point glue in the prior art, a glue surface is formed through point glue diffusion, and bubbles are easy to generate in the coating process, the glue coating jig 100 provided by the application can heat the glue so as to be beneficial to discharging bubbles in the glue, prevent the neutral layer of the bendable region 21 of the display screen from shifting due to the existence of the bubbles, ensure that the metal wire of the bendable region 21 of the display screen is positioned in the neutral layer of the bendable region 21, ensure that the glue layer plays a good role in protecting the metal wire, prevent the metal wire from being cracked due to stress in the bending process, and simultaneously prevent external substances such as water/oxygen from invading the metal wire in the screen body of the bendable region 21 through the bubbles, thereby being beneficial to improving the reliability of the display screen.
Alternatively, referring to fig. 2, the heating element 13 is provided inside the side wall of the tank 11.
Optionally, the heating element 13 is provided on the outer surface of the side wall of the tank 11.
Alternatively, the heating element 13 may be a heating wire, a heating net, a heating film, or the like, and may be capable of achieving a heating function.
Optionally, the heating elements 13 are uniformly distributed along the circumferential direction of the groove 11, and the heating elements 13 are uniformly distributed along the height direction of the groove, so that uniform heating of the colloid in the accommodating space of the groove 11 is realized, and uniformity and consistency of the adhesive layer formed on the surface of the bendable region 21 of the display screen are ensured.
Referring to FIG. 3, blade 12 includes oppositely disposed first and second sides 121, 122, and also includes oppositely disposed first and second end faces 123, 124; the first end face 123 connects the first side face 121 and the second side face 122, and the second end face 124 connects the first side face 121 and the second side face 122. Wherein first end 123 is the surface of blade 12 for colloid contact. As shown in fig. 3, in the present embodiment, blade 12 is rectangular parallelepiped. First end face 123 of blade 12 may be planar.
In an embodiment, only the first end face 123 is a smooth surface, so that the surface of the colloid is not rugged by the scraper 12 in the process of repeatedly scraping the colloid surface of the scraper 12, which is beneficial to ensuring the consistency of the colloid thickness. And the first end face 123 is parallel to the end face of the first end 111 of the groove 11, so as to ensure the accuracy of the thickness of the colloid.
In one embodiment, the first side 121, the second side 122, and the first end 123 are smooth planar surfaces. Since the portions of the first side 121 and the second side 122, which are close to the first end face 123, are in contact with the colloid during the scraping process of the colloid by the scraper 12, the first side 121 and the second side 122 are set to be smooth planes, and further, the surface of the colloid is not uneven during the scraping process of the scraper 12.
Optionally, the scraper 12 is made of metal, glass or silicon; the material of the blade 12 may be selected as required, and the surface thereof may be a smooth plane.
With continued reference to fig. 3, a plurality of blind holes 125 are provided in first side 121 and/or second side 122, blind holes 125 being configured to receive at least a portion of the excess glue scraped by blade 12. When the scraper 12 scrapes off more colloid, at least part of the excess colloid is sucked into the blind holes 125, so that the excess colloid can be reused, and the waste of materials is avoided. Blade 12 may be removed from tank 11.
Blind bore 125 is a smaller distance from first end face 123 of blade 12 than blind bore 125 is from second end face 124 of blade 12. That is, the blind hole 125 is disposed near one end of the first end face 123, so as to facilitate adsorbing the excessive colloid.
Optionally, the distance between the blind hole 125 and the first end face 123 is greater than 10 microns; it will be appreciated that the distance between the blind hole 125 and the first end face 123 is too small, and the blind hole 125 may cause roughness of the surface of the colloid during the scraping process of the surplus colloid by the scraper 12, so that the influence of the blind hole 125 on the flatness of the surface of the colloid while adsorbing the surplus colloid is avoided.
Illustratively, the direction from the first side 121 to the second side 122 is the same as the direction of movement of the blade 12, with the second side 122 being provided with blind holes 125. Illustratively, the direction from the second side 122 to the first side 121 is the same as the direction of movement of the blade 12, with the first side 121 being provided with blind holes 125. Optionally, the first side 121 and the second side 122 are provided with blind holes 125, and the moving direction of the scraper 12 may be set arbitrarily as required.
Optionally, a third anti-adhesion coating is disposed on the wall of the blind hole 125, so as to take out the excessive colloid adsorbed in the blind hole 125 for reuse. The third anti-sticking coating is teflon; the material of the third release coating can be selected according to the requirement, and the third release coating can be release.
The shape, size and number of the blind holes 125 are not limited and may be selected as desired. It can be appreciated that the size of the aperture of the blind hole 125 determines the adsorption force of the blind hole 125, and the design of the adsorption force of the blind hole 125 should be satisfied so that the adsorption force does not affect the flatness of the upper surface of the colloid while adsorbing the colloid.
Referring to fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of a glue spreading jig according to a second embodiment of the present application, and fig. 6 may be a schematic top structural diagram of a groove of the glue spreading jig provided in fig. 5.
The gluing jig 100 provided in fig. 5 is substantially identical to the gluing jig 100 provided in fig. 1 in structure, and is different in that: the connection mode of the groove 11 and the scraper 12 is different, and other same parts are not described again.
In this embodiment, blade 12 is mounted on an end surface of second end 112 of tank 11. At this time, the height H of the groove 11 is designed to be the thickness of the glue layer required for the piece 20 to be glued.
In order to prevent the scraper 12 from flowing down along the outer surface of the tank 11 during the process of scraping more colloid, a groove 1121 is provided on the end surface of the second end 112 of the tank 11, so that the excessive colloid flows to the groove 1121 during the scraping process, and the recycling is facilitated. Fig. 5 corresponds to the provision of a recess on the side of the low-lying surface in fig. 1 near the high-lying surface.
It can be understood that the glue spreading jig provided in fig. 5 is relatively to the glue spreading jig provided in fig. 1, and the groove 1121 of the glue spreading jig provided in fig. 5 has a larger collecting space, which is beneficial to recycling the glue.
Alternatively, as shown in fig. 7, the inner and outer end surfaces of the groove 1121 may be of equal height, the inner and outer end surfaces of the groove 1121 being located on the same plane. Fig. 6 may also be a schematic top view of a groove of the glue spreading jig provided in fig. 7.
Referring to fig. 8 and 9, fig. 8 is a schematic structural diagram of a glue spreading jig according to a third embodiment of the present application, and fig. 9 is a schematic structural diagram of a glue spreading jig according to a fourth embodiment of the present application.
The gluing jig 100 provided in fig. 8 and 9 is substantially identical to the gluing jig 100 provided in fig. 1, and is different in that: the connection mode of the groove 11 and the scraper 12 is different, and other same parts are not described again.
In this embodiment, a sliding groove or a sliding rail is provided on the inner surface of the second end 112 of the groove 11, and the scraper 12 has a corresponding sliding block or a clamping groove. That is, when the sliding rail 1122 is disposed on the inner surface of the second end 112 of the groove 11, the scraper 12 has a slot 126 corresponding to the sliding rail, and the slot 126 is slidably disposed on the sliding rail 1122 (as shown in fig. 8); at this time, the distance H between the surface of the sliding rail 1122 near the first end 111 of the groove 11 and the end surface of the first end 111 is designed to be the thickness of the glue layer required by the piece 20 to be glued. When the inner surface of the second end 112 of the tank 11 is provided with a sliding slot 1123, the scraper 12 is provided with a sliding block 127 corresponding to the sliding slot 1123, and the sliding block 127 is slidably arranged in the sliding slot 1123 (as shown in fig. 9); at this time, the distance H between the surface of the chute 1123 near the first end 111 of the chute body 11 and the end surface of the first end 111 is designed to be the thickness of the glue layer required for the piece 20 to be glued.
In one embodiment, in order to prevent the scraper 12 from flowing down along the outer surface of the tank 11 during the process of scraping off the excessive colloid, a groove 1121 is provided on the end surface of the second end 112 of the tank 11, so that the excessive colloid flows into the groove 1121 during the scraping process, and thus, the recycling is facilitated.
In another embodiment, in order to avoid that the scraper 12 scrapes off the surplus colloid, the colloid flows down along the outer surface of the tank 11, a notch (not shown) is provided at the second end 112 of the tank 11, the axis of the notch is substantially parallel to the sliding direction of the scraper 12, and a collecting device is provided at the notch to collect the surplus colloid.
It can be appreciated that, compared with the glue spreading jig provided in fig. 1, the glue spreading jig provided in fig. 8 and fig. 9 has a larger collection space for the groove 1121, which is beneficial to recycling the glue.
Referring to fig. 10, fig. 10 is a schematic diagram illustrating a glue spreading method using a glue spreading jig according to a first embodiment of the present application.
The application also provides a method for gluing the gluing piece waiting for the display screen by adopting the gluing jig 100 of any embodiment, which comprises the following steps:
Step 110: the groove body 11 is arranged on the surface of the piece 20 to be glued, wherein the end face of the first end 111 of the groove body 11 is abutted against the surface of the piece 20 to be glued.
Step 120: and injecting colloid into an accommodating space surrounded by the side wall of the groove body 11 and the piece to be glued.
The thickness of the colloid is larger than that of the target adhesive layer, and the target adhesive layer is the thickness of the adhesive layer required by the display screen.
Step 130: the scraper 12 is used to scrape off the excess glue.
Step 140: the glue on the piece to be glued 20 is cured.
Illustratively, the member 20 to be glued comprises a display screen. Firstly, the groove 11 is accurately aligned with the spreading area of the flattened display screen, and the accurate alignment refers to the orthographic projection of the inner edge of the bending area 21 of the display screen on the display screen 20 at the port of the first end 111 of the groove 11. After the alignment is completed, the end face of the first end 111 of the groove body 11 is contacted with the display screen, the vacuumizing device is opened, the groove body 11 and the display screen are tightly adsorbed together, and the adsorption force ensures that the screen body is not damaged. The receiving space of the tank 11 is filled with a gel greater than a desired thickness, and then the surplus gel is scraped off using the scraper 12. The scraper 12 is also beneficial to extruding residual gas in the colloid during scraping and sliding processes. The thickness uniformity of the colloid scraped by the scraper 12 is good, the interior is uniform, and the metal wire can be ensured to be positioned on the neutral layer. After the lamination is completed, the groove 11 is removed, and then the colloid is solidified. The gluing method can effectively eliminate pores and bubbles in the colloid, improve the thickness precision of the colloid, ensure that the metal wire is positioned on the neutral layer of the bending area of the display screen, avoid the stress cracking of the metal wire and greatly improve the reliability of the display screen.
Referring to fig. 11, fig. 11 is a schematic diagram illustrating a glue spreading method using a glue spreading jig according to a second embodiment of the present application.
The application also provides a method for gluing the display screen by adopting the gluing jig 100 of any embodiment, which comprises the following steps:
Step 210: the groove body 11 is arranged on the surface of the piece 20 to be glued, wherein the end face of the first end 111 of the groove body 11 is abutted against the surface of the piece 20 to be glued.
Step 220: and injecting colloid into an accommodating space surrounded by the side wall of the groove body 11 and the piece to be glued.
The thickness of the colloid is larger than that of the target adhesive layer, and the target adhesive layer is the thickness of the adhesive layer required by the display screen.
Step 230: the gel in the tank 11 is heated by the heating element.
Step 240: the scraper 12 is used to scrape off the excess glue.
Step 250: the glue on the piece to be glued 20 is cured.
Illustratively, the article 20 to be glued comprises a display screen. Firstly, the groove 11 and the to-be-glued area of the to-be-glued piece of the display screen are precisely aligned, and the precise alignment refers to the orthographic projection of the bending area 21 of the display screen on the inner edge of the port of the first end 111 of the groove 11. The bend 21 of the display screen is in front projection on the display screen 20 at the inner edge of the port at the first end 111 of the slot 11. After the alignment is completed, the end face of the first end 111 of the groove body 11 is contacted with the glue coating waiting piece of the display screen, the vacuumizing device is opened, so that the groove body 11 and the glue coating waiting piece of the display screen are tightly adsorbed together, and the adsorption strength ensures that the glue coating waiting piece of the display screen is not damaged. The heating element heats the colloid in the tank body 11, the bubble pressure in the colloid becomes larger and the volume becomes larger gradually along with the temperature rise, and meanwhile, the viscosity of the BPL colloid (which can be UV colloid) is reduced, the fluidity is enhanced, and the diffusion and overflow of the gas in the colloid are facilitated. Colloid with thickness greater than the required thickness is injected into the containing space of the tank body 11, and the colloid injection is completed to keep the temperature for a certain time so as to make the gas inside the colloid diffuse and overflow, and then the scraper 12 is used to scrape off the redundant colloid. The scraper 12 is also beneficial to extruding residual gas in the colloid during scraping and sliding processes. The thickness uniformity of the colloid scraped by the scraper 12 is good, the interior is uniform, and the metal wire can be ensured to be positioned on the neutral layer. After the lamination is completed, the groove 11 is removed, and then the colloid is solidified. The gluing method can effectively eliminate pores and bubbles in the colloid, improve the thickness precision of the colloid, ensure that the metal wire is positioned on the neutral layer of the bending area of the display screen, avoid the stress cracking of the metal wire and greatly improve the reliability of the display screen.
The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the application.
Claims (12)
1. The utility model provides a rubber coating tool for the bending area rubber coating of display screen, its characterized in that includes:
The device comprises a tubular groove body, a first connecting piece and a second connecting piece, wherein the tubular groove body comprises a first end and a second end which are oppositely arranged; the first end and the second end are provided with non-closed ports, and the end face of the first end of the groove body is used for being in contact with a piece to be glued, so that the side wall of the groove body and the piece to be glued form an accommodating space for accommodating colloid; wherein the piece to be glued is a display screen; the end face of the first end of the groove body is provided with a first hole; the tank body is provided with an air suction hole; an air suction channel is arranged in the side wall of the groove body, and the air suction channel is used for communicating the air suction hole with the first hole; the air suction hole is used for connecting a vacuumizing device so that the end face of the first end of the groove body is adsorbed with the piece to be glued;
The scraping plate is used for sliding and overlapping the second end of the groove body, moving from one side of the second end of the groove body to the opposite side, and scraping off the redundant part of colloid; the scraping plate comprises a first end face and is used for being in contact with the colloid; the first end face is a smooth plane and is parallel to the end face of the first end of the groove body; the scraping plate further comprises a first side surface and a second side surface which are oppositely arranged, and the first end surface is connected with the first side surface and the second side surface; the first side surface and the second side surface are smooth planes; the first side surface and/or the second side surface are/is provided with a plurality of blind holes; the blind holes are used for accommodating at least part of the excessive colloid scraped by the scraper;
Wherein, the inner surface of the side wall of the groove body is provided with a first anti-sticking coating; the surface of the scraping plate, which is used for being in contact with the colloid, is provided with a second anti-sticking coating;
The end face of the second end of the groove body is provided with a step, the outer surface of the groove body points to the direction of the inner surface, the step is in a descending trend relative to the end face of the first end, the step comprises a high-position surface and a low-position surface, and the scraping plate is used for being erected on the low-position surface of the step; the dimension of the scraping plate along the second direction is equal to the dimension of the inner edge of the high position surface of the groove body along the second direction, the second direction is perpendicular to the moving direction of the scraping plate, and the second direction is perpendicular to the direction that the first end of the groove body points to the second end;
Or, a sliding groove is formed in the inner surface of the second end of the groove body, the scraping plate is provided with a sliding block corresponding to the sliding groove, and the sliding block is arranged in the sliding groove in a sliding way;
Or, the inner surface of the second end of the groove body is provided with a sliding rail, the scraping plate is provided with a clamping groove corresponding to the sliding rail, and the clamping groove is slidably arranged on the sliding rail.
2. The gluing jig of claim 1, wherein the tank comprises a tank body and a dense coating; the material of the tank body is porous; the compact coating covers the surface of the tank body except the end face of the first end and the area where the air exhaust hole is located;
Or, the groove body is a compact substrate.
3. The glue spreading jig of claim 1, further comprising a heating element disposed on the tank, the heating element configured to heat the glue.
4. A gluing jig according to claim 3, wherein the heating element is disposed inside the side wall of the tank or on the outer surface of the side wall of the tank.
5. A gluing jig according to claim 3, wherein the heating elements are evenly distributed along the circumference of the tank and the heating elements are evenly distributed along the height direction of the tank.
6. The glue application jig of claim 1, wherein the first release coating covers the entire inner surface of the groove; the second release coating covers the entire outer surface of the squeegee.
7. The glue spreading jig according to claim 1, wherein the scraping plate is made of metal, glass or silicon wafer.
8. The glue spreading jig of claim 1, wherein the scraper further comprises a second end surface disposed opposite the first end surface, the blind hole being less than the distance between the blind hole and the first end surface of the scraper.
9. The gluing jig of claim 1, wherein the steps are disposed along a circumferential direction of the groove body; the inner edge of the low position face is the same size and shape as the port of the first end.
10. A gluing method using the gluing jig according to any one of claims 1 to 9, comprising:
The groove body is arranged on the surface of the piece to be glued, wherein the end face of the first end of the groove body is abutted with the surface of the piece to be glued;
Injecting colloid into an accommodating space surrounded by the side wall of the groove body and the piece to be glued;
Scraping off the surplus part of the colloid by adopting the scraping plate;
And solidifying the colloid on the piece to be glued.
11. The method of glue spreading according to claim 10, wherein when the glue spreading jig further comprises a heating element, before scraping off the excess portion of the glue with the squeegee, further comprising:
And heating the colloid in the tank body through the heating element.
12. The gluing method of claim 11, wherein the piece to be glued comprises a display screen, and wherein the bendable region of the display screen is within an orthographic projection of the inner edge of the port at the first end of the slot on the display screen.
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| CN202210389590.6A CN114798314B (en) | 2022-04-13 | 2022-04-13 | Gluing jig and gluing method |
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| CN202210389590.6A CN114798314B (en) | 2022-04-13 | 2022-04-13 | Gluing jig and gluing method |
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| CN114798314A (en) | 2022-07-29 |
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