Laminating device and method

Abstract

The present invention provides a bonding device and method, wherein the bonding device includes a workbench, a bonding mechanism disposed above the workbench, the workbench being used to support liquid crystal glass, the bonding mechanism including a guide film, a bonding rolling device, and an angle adjustment device, a flexible film being bonded to the underside of the guide film, the outer side surface of the bottom of the bonding rolling device being tangent to the top surface of the liquid crystal glass, the angle adjustment device being disposed above the workbench, the bonding rolling device and the angle adjustment device being disposed relative to each other, a rolling space for bonding the liquid crystal glass and the flexible film being formed between the bonding rolling device and the angle adjustment device, the guide film sequentially passing around the underside of the bonding rolling device and the overside of the angle adjustment device, and the guide film being in a stretched state. The present invention can achieve fully automatic bonding of both flat glass and flexible film, and can achieve fully automatic bonding of curved glass and flexible film, has low equipment cost, produces less bubbling, has a good bonding effect, and has high-quality finished products.

Description

Technical Field

[0001] The present invention relates to the technical field of display panel processing equipment, and in particular to a bonding device and method. Background Art

[0002] Existing module lamination equipment in the display panel industry is highly specialized and lacks versatility. While both flat and custom-shaped screens have their own dedicated lamination equipment, mobile phone and custom-shaped screens mostly utilize fully automatic vacuum lamination. This fully automatic vacuum lamination process primarily operates by attaching the material to a sealed cavity, either by securing a flap at one end to the other, or by forming a sealed cavity with linearly moving upper and lower cavities. Vacuum lamination is then achieved through vacuum pumping and extrusion, resulting in high equipment costs. Summary of the Invention

[0003] In order to solve the above-mentioned defects, the present invention provides a bonding device and method, which can realize fully automatic bonding of flat glass and flexible film, as well as fully automatic bonding of curved glass and flexible film, greatly reducing the equipment cost, and has less bubbles generated by bonding, good bonding effect, and good quality of the finished product.

[0004] In the first aspect, a bonding device includes a workbench and a bonding mechanism arranged above the workbench, the workbench is used to carry liquid crystal glass, the bonding mechanism includes a guide film, a bonding rolling device and an angle adjustment device, a flexible film is bonded to the lower side of the guide film, the outer side surface of the bottom of the bonding rolling device is arranged tangent to the top surface of the liquid crystal glass, the angle adjustment device is arranged above the workbench, the bonding rolling device and the angle adjustment device are arranged relative to each other, and a rolling space for bonding the liquid crystal glass and the flexible film is formed between the bonding rolling device and the angle adjustment device, the guide film sequentially passes around the bottom of the bonding rolling device and the top of the angle adjustment device, and the guide film is in a stretched state.

[0005] In one embodiment of the present invention, the bonding rolling device includes a bonding transverse movement module, a bonding cylinder, a bonding mounting frame, and a bonding roller. A bonding roller is provided at one end of the bonding mounting frame, and the other end is connected to the bonding cylinder. The top end of the bonding cylinder is connected to the slider of the bonding transverse movement module.

[0006] In one embodiment of the present invention, a pressure sensor is installed between the laminating cylinder and the laminating mounting frame.

[0007] In one embodiment of the present invention, the angle adjustment device includes an angle adjustment transverse movement module, an angle adjustment mounting frame and an angle adjustment roller, one end of the angle adjustment mounting frame is connected to the angle adjustment roller, and the other end is connected to the angle adjustment transverse movement module.

[0008] In one embodiment of the present invention, the bonding device also includes a rotating base plate and a rotating beam arranged above the rotating base plate. The rotating base plate is connected to the angle adjustment transverse movement module and the bonding transverse movement module below it. The rotating base plate is connected to the rotating beam through a connecting piece, and the end of the rotating beam is provided with a rotating mechanism for rotating the bonding mechanism.

[0009] In one embodiment of the present invention, the rotating mechanism includes a servo motor or a DD motor.

[0010] In one embodiment of the present invention, the laminating device is provided with a first angle adjustment device and a second angle adjustment device, and the first angle adjustment device and the second angle adjustment device are respectively installed on both sides of the laminating rolling device.

[0011] In one embodiment of the present invention, the bonding mechanism also includes a first fixed roller device, a second fixed roller device, a first tensioning device and a second tensioning device, the first fixed roller device and the second fixed roller device are respectively installed on the two sides opposite to the first angle adjustment device and the second angle adjustment device, the first tensioning device and the second tensioning device are respectively installed on both sides of the first fixed roller device and the second fixed roller device; one end of the guide film is connected to the first tensioning device, and the other end is connected to the second tensioning device by successively passing around the bottom of the first fixed roller device, the top of the first angle adjustment roller device, the bottom of the bonding roller device, the top of the second angle adjustment roller device, and the bottom of the second fixed roller device.

[0012] In a second aspect, the present invention provides a bonding method for bonding liquid crystal glass and a flexible film, comprising the following steps:

[0013] S1, attaching the guide film to the flexible film;

[0014] S2, rotating the laminating mechanism 180° and using the film tearing mechanism to tear the flexible film;

[0015] S3. After the film is peeled off, the laminating mechanism is rotated 180 degrees to laminate the bottom of the laminating rolling device to one side of the liquid crystal glass; the portion where the liquid crystal glass and the flexible film are laminated is placed in the rolling space between the laminating rolling device and the angle adjustment device;

[0016] S4. The laminating rolling device rolls to laminate the unlaminated portion of the liquid crystal glass to the flexible film.

[0017] In one embodiment of the present invention, in step S4, the laminating mechanism is rotated as the curve of the liquid crystal glass changes so that the pressure direction of the laminating rolling device always remains consistent with the normal line of the laminating contact surface.

[0018] In summary, the present invention provides a laminating device and method, and the beneficial effects of the present invention are:

[0019] The laminating device first bonds the flexible film to the guide film and simultaneously inserts the flexible film and liquid crystal glass between a laminating roller and an angle adjustment device. The laminating roller and angle adjustment device then cooperate to roll the curved glass and the flexible film, laminating the flat or curved liquid crystal glass to the flexible film. Compared to traditional laminating methods, this produces less bubbling, resulting in a better laminating effect and higher-quality finished products. Initially, the bottom of the laminating roller aligns with one side of the liquid crystal glass, ensuring precise positioning and preventing misalignment.

[0020] Furthermore, the laminating rolling device is provided with a laminating transverse movement module, which can realize the movement of the laminating roller. The laminating rolling device is provided with a laminating cylinder, which provides laminating pressure to the laminating roller through the laminating cylinder. The laminating pressure is adjusted according to the performance of different flexible films to improve the laminating effect.

[0021] Furthermore, an angle adjustment transverse movement module is provided above the angle adjustment device, and the angle adjustment transverse movement module is used to adjust the distance between the laminating rolling device and the angle adjustment device.

[0022] Furthermore, the bonding equipment is provided with a rotating mechanism for rotating the bonding mechanism. Before bonding, the bonding mechanism can be rotated 180° by the rotating mechanism to tear off the flexible film on the guide film. After the film tearing is completed, it is rotated 180° again to bond the flexible film to the liquid crystal glass. The process is more compact and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a bonding device provided in one embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the bonding mechanism structure.

[0025] Figure 3 for Figure 2 Schematic diagram of the AA section.

[0026] Figure 4 Schematic diagram of the bonding principle of the bonding equipment.

[0027] In the figure, 11, first mounting bracket; 12, second mounting bracket; 13, rotating beam; 14, rotating base plate; 21, DD motor; 22, bearing; 23, positioning cylinder; 3, laminating mechanism; 31, laminating rolling device; 311, laminating transverse module; 312, laminating cylinder; 313, pressure sensor; 314, laminating mounting frame; 315, laminating roller; 316, laminating fixing plate; 317, screw rod; 318, linear guide rail; 319, laminating connecting plate; 3 21. First angle adjustment roller; 322. First angle adjustment transverse shift module; 323. First angle adjustment mounting bracket; 33. Second angle adjustment device; 331. Second angle adjustment roller; 332. Second angle adjustment transverse shift module; 333. Second angle adjustment mounting bracket; 34. First fixed roller device; 35. Second fixed roller device; 36. First tensioning device; 37. Second tensioning device; 38. Guide film; 4. Workbench; 5. Liquid crystal glass; 6. Flexible film. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, the present invention provides a laminating device, including a first mounting bracket 11, a second mounting bracket 12, a rotating mechanism, a rotating beam 13, a rotating base plate 14, a laminating mechanism 3 and a workbench 4. The first mounting bracket 11 and the second mounting bracket are arranged opposite each other, and a rotating beam 13 is arranged between the first mounting bracket 11 and the second mounting bracket 12. The rotating beam 13 is connected to the rotating base plate 14 below it through a connecting piece. The laminating mechanism 3 is arranged below the rotating base plate 14, and the workbench 4 is arranged below the laminating mechanism 3.

[0030] The workbench 4 is used to support the liquid crystal glass 5. Optionally, the workbench 4 holds the liquid crystal glass 5 by vacuum adsorption to prevent the liquid crystal glass from sliding and affecting the rolling effect.

[0031] The rotating mechanism includes a rotating drive device and a bearing 22. The bearing 22 is installed on the first mounting bracket, and the rotating drive device is installed on the second mounting bracket 12. The two ends of the rotating beam 13 are respectively connected to the rotating drive device and the bearing 22. The rotating drive device drives the rotation of the rotating beam 13, and the rotating beam 13 drives the rotation of the rotating base plate 14. The rotating base plate 14 drives the rotation of the fitting mechanism 3.

[0032] In this embodiment, the rotation drive device is a DD motor (linear motor) 21, and a positioning cylinder 23 is provided on the first mounting bracket 11. The positioning cylinder 23 is connected to the bearing 22 through a positioning pin, which is used to fix the bearing 22 when the power is off to prevent the bonding mechanism from flipping over and avoid the loss of the bonding product caused by the power outage.

[0033] In other embodiments, the rotary drive device is a servo motor. The servo motor is controlled in a closed loop, which has more reliable control performance and is particularly suitable for laminating curved mobile phone screens. This design also falls within the scope of protection of the present invention.

[0034] The bonding mechanism 3 includes a guide film 38, a bonding rolling device 31 and an angle adjustment device. The flexible film 6 is bonded to the lower side of the guide film 38. The outer side surface of the bottom of the bonding rolling device 31 is arranged tangent to the top surface of the liquid crystal glass 5. The angle adjustment device is arranged above the workbench 4. The bonding rolling device 31 and the angle adjustment device are arranged opposite to each other. A rolling space for bonding the liquid crystal glass 5 and the flexible film 6 is formed between the bonding rolling device 31 and the angle adjustment device.

[0035] Specifically, such as Figure 2As shown, the laminating mechanism 3 includes a guide film 38, a laminating rolling device 31, a first angle adjustment device, a second angle adjustment device 33, a first fixed roller device 34, a second fixed roller device 35, a first tensioning device 36, and a second tensioning device 37. The first angle adjustment device and the second angle adjustment device 33 are respectively disposed above the workbench 4, and the first and second angle adjustment devices 33 are disposed on either side of the laminating rolling device 31. The first and second fixed roller devices 34, 35 are respectively mounted on opposite sides of the first and second angle adjustment devices 33. The first tensioning device 36 and the second tensioning device 37 are respectively mounted on either side of the first and second fixed roller devices 34, 35. The flexible film 6 is attached to the underside of the guide film 38. The outer side surface of the bottom of the laminating rolling device 31 is arranged tangentially to the top surface of the liquid crystal glass 5. This effectively improves the stability of the flexible film 6 and the liquid crystal glass 5 during lamination, thereby enhancing the laminating effect. A rolling space for bonding the liquid crystal glass 5 and the flexible film 6 is formed between the bonding rolling device 31 and the second angle adjustment device 33. One end of the guide film 38 is connected to the first tensioning device 36, and the other end passes through the bottom of the first fixed roller device 34, the top of the first angle adjustment roller device, the bottom of the bonding roller device, the top of the second angle adjustment roller device, and the bottom of the second fixed roller device 35 and is connected to the second tensioning device 37. The guide film 38 is in a stretched state.

[0036] In other embodiments, one or more angle adjustment devices are used to adjust the fitting angle of the guide film 38 , and this design also falls within the protection scope of the present invention.

[0037] In this embodiment, the laminating rolling device 31 includes a laminating transverse shifting module 311, a laminating cylinder 312, a laminating mounting frame 314, and a laminating roller 315. The laminating roller 315 is mounted on one end of the laminating mounting frame 314 and connected to the laminating cylinder 312 at the other end. The top end of the laminating cylinder 312 is connected to the slider of the laminating transverse shifting module 311. The present invention utilizes rollers to roll and press the liquid crystal glass 5 and the flexible film 6. As the laminating roller 315 moves transversely, it also rotates, which helps improve the laminating effect.

[0038] Optionally, the outer cover of the laminating roller 315 is provided with soft materials such as silica gel and polyurethane to prevent scratches on the liquid crystal glass and the flexible film.

[0039] Furthermore, a pressure sensor 313 is installed between the laminating cylinder 312 and the laminating mounting frame 314. The pressure sensor 313 monitors the pressure on the liquid crystal glass and the flexible film 6 during the laminating process, facilitating precise control of the rolling force to prevent damage to the liquid crystal glass and the flexible film.

[0040] like Figure 3As shown, the laminating rolling device 31 also includes a laminating fixed plate 316, which includes a top plate and side plates connected to the top plate. The top plate and the side plates are L-shaped, and two linear guide rails 318 are provided on the side plates of the laminating fixed plate 316. The bottom of the top plate of the laminating fixed plate 316 is connected to the cylinder barrel of the laminating cylinder 312, and the piston rod of the laminating cylinder 312 is connected to the middle of the laminating connecting plate 319. The two sides of the connecting plate are connected to the top of the laminating mounting frame 314 via screw rods. Support members are respectively provided on the left and right sides of the laminating mounting frame 314. The support members are connected to the top of the laminating mounting frame 314 via screw rods 317. The sides of the support members are connected to the corresponding linear guide rails 318. The provision of screw rods 317 facilitates the adjustment of the height of each position on the top of the laminating mounting frame 314, ensuring that the entire laminating roller 315 is at the same height and ensuring laminating accuracy.

[0041] Furthermore, the laminating fixed plate 316 is connected to a slider on the laminating transverse movement module 311 to achieve transverse movement of the laminating fixed plate 316 , thereby driving transverse movement of the laminating roller 315 .

[0042] In this embodiment, the first angle adjustment device includes a first angle adjustment transverse movement module 322, a first angle adjustment mounting frame 323 and a first angle adjustment roller 321, one end of the first angle adjustment mounting frame 323 is connected to the first angle adjustment roller 321, and the other end is connected to the first angle adjustment transverse movement module 322.

[0043] In this embodiment, the second angle adjustment device 33 includes a second angle adjustment transverse movement module 332, a second angle adjustment mounting frame 333 and a second angle adjustment roller 331, one end of the second angle adjustment mounting frame 333 is connected to the second angle adjustment roller 331, and the other end is connected to the second angle adjustment transverse movement module 332.

[0044] The present invention also discloses a bonding method for bonding liquid crystal glass and a flexible film, comprising the following steps:

[0045] S1, attaching the guide film 38 to the flexible film 6;

[0046] Specifically, the flexible film 6 is selected from one of the functional films such as polarizer, heat dissipation film, optical adhesive, etc. The middle of the flexible film 6 is the functional film, and the upper and lower layers are respectively provided with protective films. The guide film 38 is made of a hardening layer, a bonding layer, a buffer layer and an adhesion layer bonded in sequence. The adhesion layer has a certain adhesion force to the outer side of the protective film of the flexible film 6, so that the flexible film 6 adheres to the guide film 38.

[0047] S2. Rotate the laminating mechanism 3 horizontally by 180°, and use the film tearing mechanism to tear the flexible film 6.

[0048] Before lamination, a protective film of the flexible film 6 needs to be torn off. The flexible film 6 is placed facing upwards by a rotating mechanism, and the protective film is quickly torn off by a film tearing mechanism.

[0049] S3. After the film is peeled off, the laminating mechanism 3 is rotated horizontally 180° to laminate the bottom of the laminating rolling device 31 to one side of the liquid crystal glass 5; the portion where the liquid crystal glass 5 and the flexible film 6 are laminated is placed in the rolling space between the laminating rolling device 31 and the angle adjustment device.

[0050] Since one side of the liquid crystal glass 5 is first bonded to the flexible film 6 before rolling, and the bonding between the liquid crystal glass 5 and the flexible film 6 is pre-positioned, the alignment of the liquid crystal glass 5 and the flexible film 6 is accurate during subsequent rolling, which can ensure the bonding effect and thus the quality of the finished product.

[0051] S4 , the laminating rolling device 31 rolls to laminate the unlaminated portion of the liquid crystal glass 5 to the flexible film 6 .

[0052] In this embodiment, the liquid crystal glass 5 is a flat glass, and the laminating transverse shift module 311 drives the laminating roller 315 to move in a horizontal direction. Figure 4 The liquid crystal glass 5 and the flexible film 6 are rolled in the direction of the arrow shown, so that the liquid crystal glass 5 and the flexible film 6 are gradually attached to each other.

[0053] Furthermore, the angle adjustment transverse shift module adjusts the position of the angle adjustment roller to prevent the flexible film 6 from bending during the rolling process, thereby ensuring product yield.

[0054] Specifically, the adhesion between the guide film 38 and the protective film of the flexible film 6 is smaller than the adhesion between the functional film of the flexible film 6 and the liquid crystal glass 5 , so that the flexible film 6 gradually transfers from the guide film 38 to the liquid crystal glass 5 as the laminating rolling device applies pressure.

[0055] The liquid crystal glass 5 and the flexible film 6 are continuously bonded through the rolling space. As the bonding progresses with the rolling, the air between the liquid crystal glass and the flexible film 6 can be continuously discharged to prevent bubbles from forming between the liquid crystal glass and the flexible film 6 and affecting the performance of the finished product.

[0056] In other embodiments, the liquid crystal glass 5 is made of curved glass. As the curve of the liquid crystal glass 5 changes, the bonding mechanism 3 rotates so that the pressure direction of the bonding rolling device 31 is always consistent with the normal of the bonding contact surface, maintaining a more stable pressure.

[0057] The rolling of the laminating roller 315 compresses the liquid crystal glass 5 and the flexible film 6, thereby laminating the liquid crystal glass 5 and the flexible film 6. Compared with the traditional laminating method using a mold, the operation is simpler and the laminating effect is better. The product after the liquid crystal glass and the flexible film 6 are laminated can be used in the field of small-sized mobile phone screens, and can also be used in the fields of large-sized touch screens and display screens, such as televisions and tablet computers.

[0058] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A laminating device, characterized in that: The invention comprises a workbench and a laminating mechanism arranged above the workbench, the workbench is used to carry the liquid crystal glass, the laminating mechanism comprises a guide film, a laminating rolling device and an angle adjustment device, the lower side of the guide film is affixed with a flexible film, the outer side surface of the bottom of the laminating rolling device is arranged tangent to the top surface of the liquid crystal glass, the angle adjustment device is arranged above the workbench, the laminating rolling device and the angle adjustment device are arranged opposite to each other, and a rolling space for laminating the liquid crystal glass and the flexible film is formed between the laminating rolling device and the angle adjustment device, the guide film sequentially passes around the lower side of the laminating rolling device and the upper side of the angle adjustment device, and the guide film is in a stretched state; The laminating rolling device includes a laminating transverse moving module, a laminating cylinder, a laminating mounting frame, and a laminating roller. One end of the laminating mounting frame is provided with a laminating roller, and the other end is connected to the laminating cylinder. The top end of the laminating cylinder is connected to the slider of the laminating transverse moving module. The angle adjustment device includes an angle adjustment transverse movement module, an angle adjustment mounting frame and an angle adjustment roller, one end of the angle adjustment mounting frame is connected to the angle adjustment roller, and the other end is connected to the angle adjustment transverse movement module; The laminating device further comprises a rotating base plate and a rotating crossbeam disposed above the rotating base plate. The rotating base plate is connected to an angle adjustment transverse movement module and a laminating transverse movement module below the rotating base plate. The rotating base plate is connected to the rotating crossbeam via a connecting member. A rotating mechanism is disposed at the end of the rotating crossbeam. The rotating mechanism is used to rotate the laminating mechanism so that the direction of the pressure applied by the laminating rolling device is always consistent with the normal line of the laminating contact surface. A pressure sensor is installed between the laminating cylinder and the laminating mounting frame; The laminating device is provided with a first angle adjustment device and a second angle adjustment device, and the first angle adjustment device and the second angle adjustment device are respectively installed on both sides of the laminating rolling device; The laminating mechanism also includes a first fixed roller device, a second fixed roller device, a first tensioning device and a second tensioning device. The first fixed roller device and the second fixed roller device are respectively installed on the two sides opposite to each other of the first angle adjustment device and the second angle adjustment device, and the first tensioning device and the second tensioning device are respectively installed on the two sides of the first fixed roller device and the second fixed roller device; one end of the guide film is connected to the first tensioning device, and the other end is connected to the second tensioning device by successively passing around the bottom of the first fixed roller device, the top of the roller of the first angle adjustment device, the bottom of the laminating roller device, the top of the roller of the second angle adjustment device, and the bottom of the second fixed roller device.

2. The laminating device according to claim 1, characterized in that: The rotating mechanism includes a servo motor or a DD motor.

3. A bonding method, comprising bonding liquid crystal glass and a flexible film using the bonding apparatus according to claim 1 or 2, comprising the following steps: S1, attaching the guide film to the flexible film; S2, rotating the laminating mechanism 180° and using the film tearing mechanism to tear the flexible film; S3. After the film is peeled off, the laminating mechanism is rotated 180 degrees to laminate the bottom of the laminating roller device to one side of the liquid crystal glass. Placing the portion where the liquid crystal glass and the flexible film have been bonded together in the rolling space between the bonding rolling device and the angle adjustment device; S4. The laminating rolling device rolls to laminate the unlaminated portion of the liquid crystal glass to the flexible film.

4. The laminating method according to claim 3, wherein: In step S4, the laminating mechanism is rotated as the curve of the liquid crystal glass changes so that the direction of the pressure applied by the laminating rolling device is always consistent with the normal line of the laminating contact surface.

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