CN113253498A - Device for controlling glue thickness in liquid glue laminating and operation method - Google Patents

Abstract

The invention relates to a device and an operation method for controlling glue thickness in liquid glue laminating, wherein the device comprises a transfer trolley and a vacuum cover which is matched with the transfer trolley for operation; the transfer trolley comprises a tabletop, a table frame and universal wheels, the table frame is connected to the lower surface of the tabletop, and the universal wheels are mounted at the bottom end of the table frame; the vacuum cover comprises a trapezoidal shell, a round pipe is arranged at the center of the top of the trapezoidal shell, the round pipe is communicated with the inside of the vacuum cover, and the trapezoidal shell can cover the whole desktop. Directly carry out the full laminating technology of product before transporting on the transport platform truck, need not to carry out the removal of product after the laminating is accomplished entirely, directly send into the tunnel furnace by the transport platform truck, avoided the product to remove and caused the glue uneven that flows, influence the solidification effect. The vacuum cover can realize pushing down the product evenly, guarantees the homogeneity that glue flows and the stability in the transportation, carries out temperature regulation in the casing, utilizes heat-conduction can make glue fast curing, does benefit to the finished product effect of the product of laminating entirely.

Description

Device for controlling glue thickness in liquid glue laminating and operation method

Technical Field

The invention relates to a device and an operation method for controlling glue thickness in liquid glue laminating, and belongs to the technical field of full laminating.

Background

The full-lamination technology is to laminate the display panel and the touch panel or the glass cover plate together seamlessly and completely by using water glue or optical glue. The technology is widely applied to small and medium-sized display terminal products such as mobile phones, flat plates, vehicles and the like. Along with the gradual increase of the size of display terminal products, the demands of electronic terminal products such as business displays, education, meetings and the like on full lamination are increasing day by day.

Chinese patent document CN206541097U discloses a full-lamination display module, including setting up the backlight unit in the fixed frame in bottom, backlight unit's the outer peripheral part that is close to is provided with the backlight frame that the cross-section is the T type, the backlight frame has the first upper surface and the second upper surface of echelonment, it has liquid crystal display part and touch part to support in proper order on the first upper surface, utilizes the fixed frame of upper portion to fix simultaneously the second upper surface with a part upper surface of touch part the upper surface quilt of touch part the region that the fixed frame in upper portion encloses is fixed with the apron, the apron size is less than the touch part. Above-mentioned full laminating display module assembly can realize the flattening on the basis of simplifying the assembling process, can also improve the yield, reduction in production cost.

Chinese patent document CN106200037A discloses a device and a method for full-laminating a touch screen and a liquid crystal display screen in blocks, the invention includes a bearing unit and a working cavity unit; the bearing unit is used for bearing the optical device to be bonded, and the working cavity unit is used for providing pressure and a thermal environment for the optical device to be bonded and binding the optical device to be bonded together; the bearing unit comprises a bearing platform, the working cavity unit comprises a metal side wall, a silica gel top cover is fixed at an opening at the upper end of the metal side wall, a plurality of groups of supporting blocks are arranged on the inner side wall near the opening at the lower end of the metal side wall, the plurality of groups of supporting blocks are used for supporting the metal heat-conducting plate, a heating pad is bonded on the upper surface of the metal heat-conducting plate, a plurality of parallel soft metal strips are uniformly bonded on the lower surface of the metal heat-conducting plate, and a gap is formed between every two adjacent soft metal strips; the metal side wall is provided with a vacuum pumping port.

According to the above technology, taking the attachment of the touch screen and the display module as an example, the existing full-attachment process mainly comprises the following three steps: (1) glue coating: coating glue on the touch screen in a certain mode; (2) aligning and pre-curing: aligning and pressing the touch screen and the display module, and performing pre-curing after the glue is leveled, wherein the pre-curing has the function of keeping the relative positions of the touch screen and the display module unchanged; (3) the curing: and completely curing the glue between the touch screen and the display module to finish the manufacture of the laminated product.

Wherein in the step (3) curing process, need strict control product levelness because of product transport or the in-process of placing to the thickness homogeneity and the flow uniformity of control laminating glue, thereby improve the yields.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the device for controlling the glue thickness in the liquid glue laminating process, and the device can control the liquid glue thickness and the laminating effect and greatly improve the yield aiming at the particularity and the requirement of the process.

The invention also provides an operation method of the device for controlling the glue thickness in the liquid glue attaching process.

Interpretation of terms:

the LCM, namely an LCD display module and a liquid crystal module, refers to a component which assembles a liquid crystal display device, a connecting piece, peripheral circuits such as a control circuit, a drive circuit and the like, a PCB circuit board, a backlight source, a structural part and the like.

TP, TOUCH Panel, Chinese refers to TOUCH screens.

CG, COVER GLASS for short, and Chinese refers to COVER GLASS.

OCA refers to a special adhesive used to bond transparent optical elements (e.g., lenses, etc.). The light transmission rate is more than 90%, the cementing strength is good, the curing can be carried out at room temperature or middle temperature, and the curing shrinkage is small.

LOCA, liquid optical cement, is used for touch-sensitive screen (TP) production manufacturing usefulness, and the touch-sensitive screen is formed by two glass laminating, and the centre is just being glued together through liquid optical cement.

The technical scheme of the invention is as follows:

a device for controlling glue thickness in liquid glue laminating comprises a transfer trolley and a vacuum cover working in cooperation with the transfer trolley;

the transfer trolley comprises a tabletop, a table frame and universal wheels, the table frame is connected to the lower surface of the tabletop, the universal wheels are mounted at the bottom end of the table frame, and glue retention grooves are formed in the peripheral edges of the tabletop;

the vacuum cover comprises a trapezoidal shell, a round pipe is arranged at the center of the top of the trapezoidal shell, the round pipe is communicated with the inside of the vacuum cover, and the trapezoidal shell can cover the whole desktop.

Preferably, the universal wheel is integrated with a brake device.

Preferably, the table frame is a multi-point support frame. The advantage of this design is, adopts multiple spot braced frame, can effectively play the effect of supporting the bearing desktop on the one hand, and on the other hand can guarantee the lightweight design of whole table frame.

Preferably, the table top adopts a frosted surface. The design has the advantages that the friction force can be increased, and the stability of the liquid crystal panel and the touch screen or the glass cover plate on the table top is improved.

Preferably, the circular tube and the trapezoidal shell are integrally manufactured.

Preferably, the trapezoidal shell comprises a large shell and a small shell, the large shell and the small shell are integrally manufactured, the length x width of the inner diameter of the large shell is 2440mm x 1440mm, and the length x width of the inner diameter of the small shell is 2200mm x 1200 mm.

Preferably, the inner top end of the large shell is provided with a compressible sealing rubber strip. The benefit of this design is that, after the vacuum hood covers the transfer platform truck, compressible joint strip laminating platform truck surface contact reaches sealed effect. The sealing strip can be compressed within a certain thickness range, and the compression amount is related to the vacuum pressure in the vacuum cover. The compression amount of the sealing strip is adjusted by controlling the vacuum degree in the vacuum cover, so that the purpose of controlling the thickness of the fully-laminated glue is achieved.

Preferably, gaps of 10mm-20mm are respectively reserved between the inner surface of the large shell and the periphery of the table top. The benefit of this design is, can guarantee accuracy and the convenience that vacuum cover and laminating platform truck counterpoint on the one hand, and on the other hand reserve the clearance and properly can make the vacuum cover guarantee the sealing strip homoenergetic and laminate the platform truck surface contact when putting on the platform truck.

Preferably, the round pipe is DN50 pipe.

The operation method of the device for controlling the glue thickness in the gluing of the liquid glue comprises the following steps:

1) on a transfer trolley, completing the glue coating, alignment and precuring procedures of the product according to a full-lamination process;

2) covering the tabletop and the product by the vacuum cover, wherein the product is covered by the small shell, and the tabletop is arranged in the large shell of the vacuum cover;

3) connecting the circular tube with external vacuum-pumping equipment, and pumping air in the small shell by using the vacuum-pumping equipment to form negative pressure inside the small shell so as to apply downward pressure to the product;

4) the temperature rising and adjusting function inside the small shell is achieved through the attaching platform, the temperature is limited within 40 ℃ during rising, and the processing time is 5-10 minutes;

5) and after the pre-curing stage is finished, the vacuum cover needs to be taken down, the transfer trolley loaded with the fully-bonded product is sent into the tunnel furnace, the curing treatment is finished in the tunnel furnace, the glue is completely cured, and the manufacture of the bonded product is finished.

The invention has the technical characteristics and beneficial effects that:

1. according to the device for controlling the thickness of the glue, the fully-laminated product is transported by the transfer trolley, the full-laminating process of the product is directly carried out on the transfer trolley before the transfer, the product does not need to move after the full lamination is finished, and the product is directly sent into the tunnel furnace by the transfer trolley, so that the phenomenon that the glue flows unevenly due to the movement of the product and the curing effect is influenced is avoided.

2. The device for controlling the thickness of the glue adopts the specially designed vacuum cover, can realize uniform pressing of the product by utilizing the vacuum cover, ensures the uniformity of glue flowing and the stability in the transferring process, regulates the temperature in the small shell, can quickly solidify the glue by utilizing the heat conduction effect, and is beneficial to the effect of fully laminating the finished product of the product.

3. The device for controlling the thickness of the glue is scientific and reasonable in structural design, low in cost, convenient to use and simple to operate, and can greatly solve the problems of uneven glue flowing, uneven thickness and poor transportation stability in the product laminating process.

Drawings

FIG. 1 is a schematic view of a conventional frame pasting process;

FIG. 2 is a schematic view of a current full-lamination process;

FIG. 3 is a schematic structural view of the transfer trolley;

FIG. 4 is a schematic view of the structure of the vacuum hood;

FIG. 5 is a schematic structural view of the vacuum hood cooperating with the transfer trolley;

FIG. 6 is a perspective view of the vacuum hood in cooperation with the transfer trolley;

wherein: 1-a table top, 2-a table frame, 3-universal wheels, 4-a glue retaining groove, 5-a large shell, 6-a small shell and 7-a circular tube.

Detailed Description

The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.

Example 1:

as shown in fig. 3-6, the embodiment provides a device for controlling glue thickness in liquid glue application, which includes a transfer trolley and a vacuum cover cooperating with the transfer trolley;

the transfer trolley comprises a tabletop 1, a table frame 2 and universal wheels 3, wherein the table frame 2 is connected to the lower surface of the tabletop 1, the universal wheels 3 are installed at the bottom end of the table frame 2, and glue retention grooves 4 are formed in the peripheral edges of the tabletop 1; the glue retaining groove 4 can facilitate the centralized treatment after the collection of the overflowed glue.

The vacuum cover comprises a trapezoidal shell, a round pipe 7 is arranged at the center of the top of the trapezoidal shell, the round pipe 7 is communicated with the inside of the vacuum cover, and the trapezoidal shell can cover the whole tabletop 1.

Specifically, the universal wheel 3 is integrated with a brake device. The brake device is a traditional foot brake, the trolley can be stopped when a foot brake plate is stepped down, and the trolley can be moved when the foot brake is released.

The table frame 2 is a nine-point supporting frame. Adopt nine support frame, can effectively play the effect of supporting bearing desktop 1 on the one hand, on the other hand, can guarantee the lightweight design of whole table frame 2. By adopting the design scheme, the area of the desktop 1 is large enough, a touch screen with larger size can be accommodated, and meanwhile, the stability of the whole vehicle body is better.

The tabletop 1 adopts a frosted surface. The friction force can be increased, and the stability of the liquid crystal panel and the touch screen or the glass cover plate on the desktop 1 is improved.

As shown in fig. 4 and 5, the vacuum cover is a rectangular parallelepiped, and is a trapezoidal housing formed by an upper layer and a lower layer, and is made of metal stainless steel, so that the structural strength and the working reliability of the device are ensured. The round tube 7 is integrally formed with the trapezoidal housing.

Trapezoidal casing includes a big casing 5 and a little casing 6, big casing 5 and little casing 6 integrated into one piece are made, the length of big casing 5 internal diameter is 2440mm x 1440mm wide, the internal diameter length of little casing 6 is 2200mm x 1200mm wide, size design vacuum hood according to laminating platform truck (platform truck all around edge is equipped with the groove of glue of staying, the size is 2400mm x 1400mm), wherein, 5 inside tops of big casing are provided with compressible joint strip, the adhesive tape position is the big casing internal surface near little casing and big casing meet the position, reach sealed effect with laminating platform truck surface contact at the during operation. The sealing strip can be compressed within a certain thickness range, and the compression amount is related to the vacuum pressure in the vacuum cover. The compression amount of the sealing strip is adjusted by controlling the vacuum degree in the vacuum cover, so that the purpose of controlling the thickness of the fully-laminated glue is achieved. The large shell 5 can wrap the laminating trolley, gaps of about 10mm-20mm are reserved between the large shell and four sides of the trolley, on one hand, the accuracy and convenience of alignment of the vacuum cover and the laminating trolley can be guaranteed, and on the other hand, the proper reserved gap can ensure that the sealing strip can be in surface contact with the laminating trolley when the vacuum cover is placed on the trolley.

The round tube 7 is positioned at the center of the top of the small shell 6, DN50 tube is selected as the round tube 7, and the round tube 7 is connected with external vacuum-pumping equipment to realize the vacuum-pumping function of the device; the round tube 7 is made of metal stainless steel, so that the structural strength and the vacuumizing reliability of the device are guaranteed; the circular tube 7 can be integrally formed with the vacuum cover or produced by welding parts.

Example 2:

the operation method of the device for controlling the glue thickness in the liquid glue attaching process in the embodiment 1 includes the following steps:

1) on the transfer trolley, the product is laminated according to the full lamination process; namely, the full-laminating process of the liquid crystal panel and the touch screen or the glass cover plate is completed on the tabletop 1 of the transfer trolley, and comprises (1) glue coating, (2) alignment and precuring;

2) covering the tabletop 1 and the product with a vacuum cover, wherein the small shell 6 covers the product, the tabletop 1 is placed in the large shell 5 of the vacuum cover, and the compressible sealing rubber strip is in close contact with the tabletop;

3) connecting the circular tube 7 with external vacuum pumping equipment, forming a closed space between the inside of the small shell 6 and the product, and pumping air in the small shell 6 by using the vacuum pumping equipment to form negative pressure inside and outside the small shell 6 so as to apply downward pressure to the product; the vacuum cover is designed by adopting metal stainless steel materials, has high rigidity, high strength and strong deformation resistance, and can set different vacuum pressures according to different attached products.

4) The temperature rising and adjusting function inside the small shell is achieved through the attaching platform, the temperature is limited within 40 ℃ during rising, and the processing time is 5-10 minutes; the purpose is to pre-cure the glue after the bonding by heating. Through precuring, the thickness that can make glue in the laminating product on the one hand is controllable, and on the other hand also can avoid the glue that jolts in the platform transportation and leads to flow to influence the homogeneity of laminating product thickness.

5) And after the pre-curing stage is finished, the vacuum cover needs to be taken down, the transfer trolley loaded with the fully-bonded product is sent into the tunnel furnace, the curing treatment is finished in the stepping tunnel furnace, the glue is completely cured, and the manufacture of the bonded product is finished. The vacuum cover mainly has the effects of controlling the thickness of glue at the glue pre-curing stage after the product is attached and preventing the influence of the transfer process on the flow of the glue.

The above description is only for the specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A device for controlling the glue thickness in the liquid glue attaching process is characterized by comprising a transfer trolley and a vacuum cover which is matched with the transfer trolley for operation;

the transfer trolley comprises a tabletop, a table frame and universal wheels, the table frame is connected to the lower surface of the tabletop, the universal wheels are mounted at the bottom end of the table frame, and glue retention grooves are formed in the peripheral edges of the tabletop;

the vacuum cover comprises a trapezoidal shell, a round pipe is arranged at the center of the top of the trapezoidal shell, the round pipe is communicated with the inside of the vacuum cover, and the trapezoidal shell can cover the whole desktop.

2. The device for applying liquid glue to control the thickness of glue according to claim 1, characterized in that said universal wheel is integrated with braking means.

3. The device for applying liquid glue to control the thickness of glue according to claim 1, wherein said table frame is a multi-point support frame.

4. The device for applying liquid glue to control the thickness of glue of claim 1, wherein said table top is sanded.

5. The device for applying the glue thickness control in the gluing of the liquid glue according to claim 1, wherein the circular tube is integrally formed with the trapezoidal housing.

6. The device for applying liquid glue to control glue thickness according to claim 1, wherein said trapezoidal housing comprises a large housing and a small housing, said large housing and said small housing are integrally formed, and the inner diameter of said large housing has a length x width of 2440mm x 1440mm, and the inner diameter of said small housing has a length x width of 2200mm x 1200 mm.

7. The device for applying the glue thickness control in the liquid glue application of claim 6, wherein the inner top end of the large shell is provided with a compressible sealing rubber strip.

8. The device for applying the glue thickness control in the gluing of the liquid glue according to claim 6, wherein a gap of 10mm to 20mm is left between the inner surface of the large shell and the periphery of the table top.

9. The device for applying the glue thickness control in the liquid glue jointing of claim 1, wherein the round tube is DN50 tube.

10. A method for operating a device for applying glue thickness control for liquid glue according to any one of claims 1 to 9, characterized in that it comprises the following steps:

1) on a transfer trolley, completing the glue coating, alignment and precuring procedures of the product according to a full-lamination process;

2) covering the tabletop and the product by the vacuum cover, wherein the product is covered by the small shell, and the tabletop is arranged in the large shell of the vacuum cover;

3) connecting the circular tube with external vacuum-pumping equipment, and pumping air in the small shell by using the vacuum-pumping equipment to form negative pressure inside the small shell so as to apply downward pressure to the product;

4) the temperature rising and adjusting function inside the small shell is achieved through the attaching platform, the temperature is limited within 40 ℃ during rising, and the processing time is 5-10 minutes;

5) and after the pre-curing stage is finished, the vacuum cover needs to be taken down, the transfer trolley loaded with the fully-bonded product is sent into the tunnel furnace, the curing treatment is finished in the tunnel furnace, the glue is completely cured, and the manufacture of the bonded product is finished.

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