A polarizing plate double-sided bonding equipment

Abstract

This invention discloses a double-sided polarizer lamination device, relating to the field of polarizer production technology. It includes an lamination assembly and an adjustment assembly. Two sets of lamination assemblies are symmetrically arranged. Each lamination assembly includes a scraper and a roller. The scraper has a triangular cross-section, a film-passing groove, and a chamfered edge. The rollers include a first roller and a second roller, and the two sets of rollers are positioned above the scraper. Simultaneously driving the scraper downwards peels off the protective film on the TAC film, thus laminating the TAC film onto the PVA film. This reduces the exposure time of the TAC film to air, preventing dust particles from adhering and affecting the quality of the polarizer. Furthermore, TAC film can be laminated on both sides of the PVA film simultaneously, improving the production efficiency of polarizers.

Description

Technical Field

[0001] This invention relates to the field of polarizer production technology, and in particular to a double-sided polarizer lamination device. Background Technology

[0002] The polarizing plate is a core component of an LCD screen. It is attached to the top and bottom of the LCD glass and works with the rotation of the liquid crystal to control whether light passes through the LCD panel to achieve the display effect. The polarizing plate is mainly made of composite materials such as PVA film, TAC film, protective film, release film, polyvinyl alcohol film, cellulose triacetate film and pressure-sensitive adhesive.

[0003] In the production process, the protective films on the polyvinyl alcohol (PVC) film and cellulose triacetate (TAC) film need to be peeled off first before they can be applied. Existing dust-free environments are not completely dust-free, and dust particles can still adhere to them after prolonged exposure. Currently, the invention patent with publication number CN114114513A discloses a film application device for polarizing plates, including an active roller and a passive roller, which are arranged adjacent to the active roller and have a bonding gap between them for the polarizing plate and the functional film layer to pass through. This can avoid defects such as warping or bubbles in batches of polarizing plates caused by uneven pressure on the polarizing plate by the passive roller. However, the device can only apply film to one side of the polarizing plate. After applying film to one side, it must be flipped to the other side, resulting in low film application efficiency. Moreover, during the film application process, the protective film on the cellulose triacetate (TAC) film needs to be peeled off first and applied to one side of the PVC film (PVA film). Then, the protective film on another TAC film needs to be peeled off and applied to the other side of the PVA film. During this process, prolonged exposure can also cause dust particles to adhere between the films, affecting the quality of the polarizing plate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing film-applying device can only apply film to one side of the polarizing plate. After applying film to one side, it is flipped to the other side, resulting in low film-applying efficiency. Moreover, in the process of applying film to the polarizing plate, it is necessary to first peel off the protective film on the TAC film and apply it to one side of the PVA film, and then peel off the protective film on another TAC film and apply it to the other side of the PVA film. During this process, prolonged exposure will cause dust particles to adhere between the films, affecting the quality of the polarizing plate.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-sided polarizing plate bonding device, comprising a bonding assembly and an adjustment assembly. The bonding assembly is symmetrically arranged in two sets. The bonding assembly includes a scraper and a roller. The scraper has a triangular cross-section, a film-penetrating groove, and a chamfer on its edge. The roller includes a first roller and a second roller, and the two sets of rollers are arranged above the scraper. The adjustment assembly includes a fixed shaft, a first slider, a first telescopic rod, a first spring, and a movable block. The fixed shaft passes through the scraper, and the first slider is fixedly connected to both ends of the fixed shaft. The movable block has a through groove, and the first slider is slidably connected to the inner wall of the through groove. The first slider is fixedly connected to one end of the first telescopic rod, and the other end of the first telescopic rod is fixedly connected to the inner wall of the through groove. The first spring is sleeved on the first telescopic rod.

[0006] As a preferred embodiment of the polarizer double-sided bonding device of the present invention, it further includes a driving assembly, which includes a cylinder, a second slider, a toothed plate, a first rotating component, a second rotating component, a gear, a belt ring, and a driving shaft. One end of the cylinder is fixedly connected to a movable block, and the two sides of the movable block are fixedly connected to the second slider. The second slider is fixedly connected to the toothed plate, the toothed plate meshes with the gear, the gear is fixedly connected to the driving shaft, and the driving shaft is connected to the first rotating component and the second rotating component through the belt ring. The first rotating component is connected to one end of the first roller, and the second rotating component is connected to one end of the second roller.

[0007] As a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the first rotating component includes a fixed plate, a second telescopic rod, a second spring, a locking block, a ratchet, and a first rotating shaft. The first rotating shaft is connected to the inner wall of the belt ring and is fixedly connected to the ratchet. The locking block is set corresponding to the ratchet and is fixedly connected to one end of the second telescopic rod. The other end of the second telescopic rod is fixedly connected to the fixed plate, and a second spring is sleeved on the second telescopic rod.

[0008] In a preferred embodiment of the polarizer double-sided bonding device of the present invention, the second rotating component includes a second rotating shaft, a first bevel gear, a second bevel gear, a third bevel gear, a third rotating shaft, and a first square rod. The second rotating shaft is connected to the inner wall of the belt ring and is fixedly connected to the first bevel gear. The first bevel gear meshes with the second bevel gear, the second bevel gear meshes with the third bevel gear, and the third bevel gear is fixedly connected to the third rotating shaft. The second rotating shaft has a cavity inside, and the inner wall of the cavity is slidably connected to the first square rod. The third rotating shaft has a first square hole corresponding to the first square rod, and the square rod is slidably connected to the inner wall of the first square hole.

[0009] In a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the driving assembly further includes a control component, which includes a fixed cylinder, a first connecting tube, a receiving cylinder, a second connecting tube, a third connecting tube, a piston head, and a movable rod. The piston head is slidably connected to the inner wall of the fixed cylinder, and the movable rod is fixedly connected to the piston head. The fixed cylinder is connected to the receiving cylinder through the second connecting tube, and one end of the first connecting tube is fixedly connected to the top of the receiving cylinder. The receiving cylinder is connected to the cavity through the third connecting tube.

[0010] As a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, it further includes a support assembly, which includes a top beam, a support column, and a base. The top beam is fixedly connected to a cylinder, and one end of the support column is fixedly connected to the top beam. The other end of the support column is fixedly connected to the base. The top beam is fixedly connected to a fixing plate. A first sliding groove is provided on the top beam, and a toothed plate is slidably connected to the inner wall of the first sliding groove. A second sliding groove is provided on the support column, and a second slider is slidably connected to the inner wall of the second sliding groove. A limit groove is provided on the inner wall of the first sliding groove, and a limit strip is provided on the toothed plate corresponding to the limit groove. The limit strip is slidably connected to the inner wall of the limit groove.

[0011] In a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the cylinder is fixedly connected to the air inlet pipe at the end away from the movable block, and the air inlet pipe is fixedly connected to the other end of the first connecting pipe.

[0012] In a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the bottom of the fixing rod is fixedly connected to the upper surface of the top beam, and the top of the fixing rod is rotatably connected to the drive shaft.

[0013] As a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the top beam is provided with a first receiving cavity, the second rotating shaft and the third rotating shaft are rotatably connected to the top beam, and the top of the fixed cylinder and the receiving cylinder are fixedly connected to the top wall of the first receiving cavity.

[0014] In a preferred embodiment of the polarizing plate double-sided bonding device of the present invention, the first rotating shaft and the third rotating shaft are respectively fixedly connected to the second square rod away from the belt ring. The first roller and the second roller are respectively provided with second square holes corresponding to the second square rod. The second rod is slidably connected to the inner wall of the second square hole. The first roller and the second roller are provided with a second receiving cavity at the end away from the second square hole. The inner wall of the second receiving cavity is slidably connected to the mounting shaft. One end of the mounting shaft is fixedly connected to one end of the third spring. The other end of the third spring is fixedly connected to the inner end wall of the second receiving cavity. The other end of the mounting shaft is rotatably connected to the top beam.

[0015] The beneficial effects of this invention are as follows: By passing the protective film on the TAC film through the film-passing groove from the bottom of the scraper, the invention fixes the first roller to one end of the TAC film and the second roller to one end of the protective film on the TAC film. Driving the first roller to rotate releases the TAC film as it is wound around it. Driving the second roller to rotate winds up the protective film on the TAC film. Simultaneously, driving the scraper downwards peels off the protective film from the TAC film. Peeling off the protective film also attaches the TAC film to the PVA film. This reduces the exposure time of the TAC film to air, preventing dust particles from adhering and affecting the quality of the polarizing plate. Furthermore, TAC film can be applied to both sides of the PVA film simultaneously, which helps improve the production efficiency of polarizing plates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this disclosure.

[0017] Figure 2 This is a schematic diagram of the scraper structure in an embodiment of this disclosure.

[0018] Figure 3 This is a schematic diagram of the adjustment component structure in an embodiment of this disclosure.

[0019] Figure 4 In the embodiments of this disclosure Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 5 For the embodiments of this disclosure Figure 1 Enlarged diagram of point B in the middle.

[0021] Figure 6 This is a schematic diagram of the second rotating component in an embodiment of this disclosure.

[0022] Figure 7 In the embodiments of this disclosure Figure 6 Enlarged diagram of point C in the middle.

[0023] Figure 8 This is a cross-sectional view of the second rotating shaft in an embodiment of this disclosure.

[0024] Figure 9 This is a cross-sectional view of the fixed cylinder in an embodiment of this disclosure.

[0025] Figure 10 This is a schematic diagram of the first chute structure in an embodiment of this disclosure.

[0026] Figure 11 In the embodiments of this disclosure Figure 1 Enlarged diagram of point D in the middle.

[0027] Figure 12 This is a cross-sectional view of the first and second rollers in an embodiment of this disclosure.

[0028] Reference numerals: Attachment assembly 1, scraper 11, film-penetrating groove 111, roller 12, first roller 121, second roller 122, second receiving cavity 123, mounting shaft 124, third spring 125, second square hole 10, adjusting assembly 2, fixed shaft 21, first slider 22, first telescopic rod 23, first spring 24, movable block 25, through groove 251, driving assembly 3, cylinder 31, air inlet pipe 311, second slider 32, toothed plate 33, limiting strip 331, first rotating component 34, second rotating component 35, gear 36, belt ring 37, driving shaft 38, fixed plate 341, second telescopic rod 342, etc. Two springs 343, locking block 344, ratchet 345, first rotating shaft 346, second rotating shaft 351, cavity 3511, first bevel gear 352, second bevel gear 353, third bevel gear 354, third rotating shaft 355, first square hole 3551, first square rod 356, control component 39, fixed cylinder 391, first connecting pipe 393, receiving cylinder 393, second connecting pipe 394, third connecting pipe 395, piston head 396, movable rod 397, second square rod 30, support assembly 4, top beam 41, first sliding groove 411, limiting groove 4111, support column 42, second sliding groove 421, base 43. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] Reference Figures 1 to 3 This embodiment provides a polarizing plate double-sided bonding device, including a bonding component 1 and an adjustment component 2. The bonding component 1 is symmetrically arranged in two sets. The bonding component 1 includes a scraper 11 and a roller 12. The scraper 11 has a triangular cross-section, a film-passing groove 111 is provided on the scraper 11, and the edge of the scraper 11 is chamfered. The roller 12 includes a first roller 121 and a second roller 122, and the two sets including the first roller 121 and the second roller 122 are arranged above the scraper 11.

[0032] In this preferred embodiment, the first roller 121 is fixedly connected to one end of the TAC film, and the second roller 122 is fixed to one end of the protective film on the TAC film. Driving the first roller 121 to rotate releases the TAC film as it is wound around the first roller 121. Driving the second roller 122 to rotate winds up the protective film on the TAC film. The PVA film is fixed between the two scrapers 11. Existing clamping rollers or clamping assemblies can be used to fix the position of the PVA film. The protective film on the TAC film passes through the film-penetrating groove 111 from the bottom of the scraper 11. Moving the scraper 11 downwards peels off the protective film from the TAC film. Furthermore, the side of the two scrapers 11 that is close to each other can smooth the TAC film attached to the PVA film, making it adhere more tightly and preventing air bubbles.

[0033] The adjustment assembly 2 includes a fixed shaft 21, a first slider 22, a first telescopic rod 23, a first spring 24, and a movable block 25. The fixed shaft 21 passes through the scraper 11, and the first slider 22 is fixedly connected to both ends of the fixed shaft 21. A through groove 251 is provided on the movable block 25. The first slider 22 is slidably connected to the inner wall of the through groove 251. One end of the first slider 22 is fixedly connected to the first telescopic rod 23, and the other end of the first telescopic rod 23 is fixedly connected to the inner wall of the through groove 251. The first spring 24 is sleeved on the first telescopic rod 23.

[0034] In this preferred embodiment, the first spring 24 can push the first slider 22 toward each other under the action of elastic force, and the first slider 22 drives the scraper 11 to move through the fixed shaft 21. At the same time, the two scrapers 11 are kept at the same height and can support each other to ensure that the two scrapers 11 clamp the PVA film and TAC film in the middle.

[0035] In use, the PVA film is fixed between the two scrapers 11, and the protective film on the TAC film is passed through the film-passing groove 111 from the bottom of the scraper 11. The first roller 121 is fixedly connected to one end of the TAC film, and the second roller 122 is fixed to one end of the protective film on the TAC film. The first roller 121 is driven to rotate, and the TAC film is released by winding around the first roller 121. The second roller 122 is driven to rotate to wind up the protective film on the TAC film. At the same time, the scraper 11 is driven to move downward to tear off the protective film on the TAC film. While tearing off the protective film, the TAC film is attached to the PVA film, which can reduce the exposure time of the TAC film in the air and avoid the adhesion of dust particles, which would affect the quality of the polarizing plate. In actual operation, the protective film on both sides of the PVA film can be applied using a specialized take-up roller. As the TAC film and PVA film adhere to each other and move downwards, the protective film on the PVA film is peeled off below the scraper 11 at the same downward speed, reducing the time the PVA film is exposed to air and further preventing dust particles from adhering. Furthermore, TAC film can be applied to both sides of the PVA film simultaneously, which helps improve the production efficiency of polarizing plates.

[0036] Example 2

[0037] Reference Figures 1 to 12 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0038] Reference Figure 1 , Figure 4 and Figure 5 It also includes a drive assembly 3, which includes a cylinder 31, a second slider 32, a toothed plate 33, a first rotating component 34, a second rotating component 35, a gear 36, a belt ring 37, and a drive shaft 38. One end of the cylinder 31 is fixedly connected to a movable block 25, and the two sides of the movable block 25 are fixedly connected to the second slider 32. The second slider 32 is fixedly connected to the toothed plate 33, and the toothed plate 33 meshes with the gear 36. The gear 36 is fixedly connected to the drive shaft 38. The drive shaft 38 is connected to the first rotating component 34 and the second rotating component 35 through the belt ring 37. The first rotating component 34 is connected to one end of the first roller 121, and the second rotating component 35 is connected to one end of the second roller 122.

[0039] In this preferred embodiment, when the cylinder 31 extends, it can drive the movable block 25 to move downward. The movable block 25 drives the scraper 11 to move downward through the first slider 22 and the fixed shaft 21. The downward movement of the scraper 11 will peel off the protective film on the TAC film. At the same time as peeling off the protective film, the TAC film will be attached to the PVA film, which can reduce the exposure time of the TAC film in the air and avoid the adhesion of dust particles, which will affect the quality of the polarizing plate. Simultaneously, the movable block 25 drives the second slider 32 to move downwards, the second slider 32 drives the toothed plate 33 to move downwards, the toothed plate 33 drives the gear 36 to rotate, the gear 36 drives the belt ring 37 to rotate via the drive shaft 38, the belt ring 37 drives the first rotating component 34 and the second rotating component 35 to rotate, the first rotating component 34 drives the first winding roller 121 to rotate, the TAC film is released from the first winding roller 121, the second rotating component 35 drives the second winding roller 122 to rotate, which can rewind the protective film on the TAC film, attach TAC film to both sides of the PVA film at the same time, and rewind the protective film torn off the TAC film, which helps to improve the production efficiency of polarizing plates.

[0040] Reference Figure 5 The first rotating component 34 includes a fixed plate 341, a second telescopic rod 342, a second spring 343, a locking block 344, a ratchet 345, and a first rotating shaft 346. The first rotating shaft 346 is connected to the inner wall of the belt ring 37 and is fixedly connected to the ratchet 345. The locking block 344 is provided corresponding to the ratchet 345 and is fixedly connected to one end of the second telescopic rod 342. The other end of the second telescopic rod 342 is fixedly connected to the fixed plate 341. The second spring 343 is sleeved on the second telescopic rod 342.

[0041] In this preferred embodiment, the rotation of the belt ring 37 will drive the first rotating shaft 346 to rotate, and the first rotating shaft 346 will drive the ratchet 345 to rotate. Under the action of the elastic force of the second spring 343, the locking block 344 can be pushed to move closer to the ratchet 345. Under the action of the locking block 344, the ratchet 345 can only rotate in one direction, and the first rotating shaft 346 can also only rotate in one direction.

[0042] Reference Figure 6The second rotating component 35 includes a second rotating shaft 351, a first bevel gear 352, a second bevel gear 353, a third bevel gear 354, a third rotating shaft 355, and a first square rod 356. The second rotating shaft 351 is connected to the inner wall of the belt ring 37. The second rotating shaft 351 is fixedly connected to the first bevel gear 352. The first bevel gear 352 meshes with the second bevel gear 353. The second bevel gear 353 meshes with the third bevel gear 354. The third bevel gear 354 is fixedly connected to the third rotating shaft 355. The second rotating shaft 351 has a cavity 3511 inside. The inner wall of the cavity 3511 is slidably connected to the first square rod 356. The third rotating shaft 355 has a first square hole 3551 corresponding to the first square rod 356. The square rod 356 is slidably connected to the inner wall of the first square hole 3551.

[0043] In this preferred embodiment, the rotation of the belt ring 37 drives the second rotating shaft 351 to rotate, the second rotating shaft 351 drives the first bevel gear 352 to rotate, the first bevel gear 352 drives the second bevel gear 353 to rotate, the second bevel gear 353 drives the third bevel gear 354 to rotate, and the third bevel gear 354 drives the third rotating shaft 355 to rotate. When the second bevel gear 353 and the first bevel gear 352 disengage, the rotation of the first bevel gear 352 cannot drive the rotation of the second bevel gear 353. However, after one end of the first square rod 356 is inserted into the inner wall of the first square hole 3551, the second rotating shaft 351 drives the third rotating shaft 355 to rotate through the first square hole 3551.

[0044] Reference Figure 6 and Figure 9 The drive assembly 3 further includes a control component 39, which includes a fixed cylinder 391, a first connecting pipe 393, a receiving cylinder 393, a second connecting pipe 394, a third connecting pipe 395, a piston head 396, and a movable rod 397. The piston head 396 is slidably connected to the inner wall of the fixed cylinder 391, and the movable rod 397 is fixedly connected to the piston head 396. The fixed cylinder 391 is connected to the receiving cylinder 393 through the second connecting pipe 394. One end of the first connecting pipe 393 is fixedly connected to the top of the receiving cylinder 393, and the receiving cylinder 393 is connected to the cavity 3511 through the third connecting pipe 395.

[0045] In this preferred embodiment, when air is pumped into the receiving cylinder 393 through the first connecting pipe 393, the air in the receiving cylinder 393 will enter the fixed cylinder 391 through the second connecting pipe 394. At this time, the air pushes the piston head 396 towards... Figure 9As the piston moves upward, the piston head 396 drives the movable rod 397 to retract into the fixed cylinder 391. At this time, when the second bevel gear 353 and the first bevel gear 352 disengage, the rotation of the first bevel gear 352 cannot drive the rotation of the second bevel gear 353. Simultaneously, the air in the receiving cylinder 393 enters the cavity 3511 through the third connecting pipe 395. The air pushes the first square rod 356 to extend. After one end of the first square rod 356 is inserted into the inner wall of the first square hole 3551, the second rotating shaft 351 drives the third rotating shaft 355 to rotate through the first square hole 3551. At this time, the rotation direction of the third rotating shaft 355 and the second rotating shaft 351 is the same.

[0046] When air is drawn from the receiving cylinder 393 through the first connecting pipe 393, the plug 396 inside the fixed cylinder 391 moves towards... Figure 9 The piston head 396 moves downwards, causing the moving rod 397 to move towards the center. Figure 9 Extending from the bottom, the movable rod 397 pushes the second bevel gear 353 to move, and the second bevel gear 353 meshes with the first bevel gear 352. The second bevel gear 353 also meshes with the third bevel gear 354. At the same time, the first square rod 356 retracts into the cavity 3511, and the end of the first square rod 356 is pulled out from the first square hole 3551. At this time, the second rotating shaft 351 drives the first bevel gear 352 to rotate, the first bevel gear 352 drives the second bevel gear 353 to rotate, the second bevel gear 353 drives the third bevel gear 354 to rotate, and the third bevel gear 354 drives the third rotating shaft 355 to rotate. The rotation direction of the third rotating shaft 355 is opposite to the rotation direction of the second rotating shaft 351.

[0047] Reference Figure 1 It also includes a support assembly 4, which includes a top beam 41, a support column 42, and a base 43. The top beam 41 is fixedly connected to a cylinder 31, and one end of the support column 42 is fixedly connected to the top beam 41. The other end of the support column 42 is fixedly connected to the base 43. The top beam 41 is fixedly connected to a fixing plate 341. A first sliding groove 411 is provided on the top beam 41. A toothed plate 33 is slidably connected to the inner wall of the first sliding groove 411. A second sliding groove 421 is provided on the support column 42. A second slider 32 is slidably connected to the inner wall of the second sliding groove 421. A limit groove 4111 is provided on the inner wall of the first sliding groove 4111. A limit strip 331 is provided on the toothed plate 33 corresponding to the limit groove 4111. The limit strip 331 is slidably connected to the inner wall of the limit groove 4111.

[0048] In this preferred embodiment, the top beam 41 is fixedly connected to the outer wall of the fixed end of the cylinder 31, which can fix the position of the cylinder 31. The support column 42 can provide fixed support for the top beam 41. The toothed plate 33 can slide on the inner wall of the first slide groove 411. Through the cooperation between the limiting strip 331 and the limiting groove 4111, the stability of the toothed plate 33 sliding on the inner wall of the first slide groove 411 is improved, ensuring that the toothed plate 33 is always meshed with the gear 36.

[0049] Reference Figure 1 and Figure 11 The cylinder 31 is fixedly connected to the air intake pipe 311 at one end away from the movable block 25, and the air intake pipe 311 is fixedly connected to the other end of the first connecting pipe 393.

[0050] In this preferred embodiment, by connecting the existing air pump and the air intake pipe 311, air can be pumped into the cylinder 31 to drive the cylinder 31 to extend and retract. Air can also enter the first connecting pipe 393 through the air intake pipe 311.

[0051] Reference Figure 4 The bottom of the fixing rod 44 is fixedly connected to the upper surface of the top beam 41, and the top of the fixing rod 44 is rotatably connected to the drive shaft 38.

[0052] In this preferred embodiment, the fixing rod 44 can support the drive shaft 38, and the drive shaft 38 can rotate on the top of the fixing rod 44.

[0053] Reference Figure 6 The top beam 41 is provided with a first receiving cavity 40, the second rotating shaft 351 and the third rotating shaft 355 are rotatably connected to the top beam 41, and the top of the fixed cylinder 391 and the receiving cylinder 393 are fixedly connected to the top wall of the first receiving cavity 40.

[0054] In this preferred embodiment, the first receiving cavity 40 can fix the fixed cylinder 391 and the receiving cylinder 393, and the second rotating shaft 351 and the third rotating shaft 355 rotate through the top beam 41 on both sides of the first receiving cavity 40.

[0055] Reference Figure 12 The first rotating shaft 346 and the third rotating shaft 355 are respectively fixedly connected to the second square rod 30 away from the belt ring 37. The first roller 121 and the second roller 122 are respectively provided with second square holes 10 corresponding to the second square rod 30. The second square rod 30 is slidably connected to the inner wall of the second square hole 10. The first roller 121 and the second roller 122 are provided with a second receiving cavity 123 at one end away from the second square hole 10. The inner wall of the second receiving cavity 123 is slidably connected to the mounting shaft 124. One end of the mounting shaft 124 is fixedly connected to one end of the third spring 125. The other end of the third spring 125 is fixedly connected to the inner end wall of the second receiving cavity 123. The other end of the mounting shaft 124 is rotatably connected to the top beam 41.

[0056] Preferably, in this embodiment, the second square rod 30 on the first rotating shaft 346 is inserted into the second square hole 10 in the first roller 121. Rotation of the first rotating shaft 346 can drive the first roller 121 to rotate. Similarly, the second square rod 30 on the third rotating shaft 355 is inserted into the second square hole 10 in the second roller 122. Rotation of the third rotating shaft 355 can drive the second roller 122 to rotate. When replacing the first roller 121 or the second roller 122, on the other side of the top beam 41, the mounting shaft 124 is pushed into the second receiving cavity 123 using a tool such as a wooden stick. At this time, the first roller 121 or the second roller 122 can be removed. When replacing the first roller 121 or the second roller 122, the third spring 125 will pop the mounting shaft 124 out and insert it into the mounting hole pre-set on the top beam 41.

[0057] In use, the PVA film is fixed between the two scrapers 11, the protective film on the TAC film is passed through the film-passing groove 111 from the bottom of the scraper 11, the first roller 121 is fixedly connected to one end of the TAC film, and the second roller 122 is fixed to one end of the protective film on the TAC film. At this time, the first spring 24 can push the first slider 22 towards each other under the action of elastic force, and the first slider 22 drives the scraper 11 to move through the fixed shaft 21. The two scrapers 11 clamp the PVA film and TAC film in the middle.

[0058] By connecting the existing air pump and air inlet pipe 311, air is pumped into cylinder 31. Cylinder 31 extends, causing movable block 25 to move downward. Movable block 25 drives scraper 11 to move downward via first slider 22 and fixed shaft 21. Scraper 11 moves downward and peels off the protective film on TAC film. At the same time as peeling off the protective film, TAC film is attached to PVA film, reducing the exposure time of TAC film in air and avoiding the adhesion of dust particles, which would affect the quality of polarizing plate. Simultaneously, the movable block 25 will drive the second slider 32 to move downwards, the second slider 32 will drive the toothed plate 33 to move downwards, the toothed plate 33 will drive the gear 36 to rotate, the gear 36 will drive the belt ring 37 to rotate through the drive shaft 38, the belt ring 37 will drive the first rotating shaft 346 and the second rotating shaft 351 to rotate, the first rotating shaft 346 will drive the ratchet 345 to rotate, and under the action of the elastic force of the second spring 343, it can push the locking block 344 to move closer to the ratchet 345. Under the action of the locking block 344, the ratchet 345 can only rotate in one direction, and the first rotating shaft 346 can also only rotate in one direction. That is to say, the first rotating shaft 346 can only rotate when the cylinder 31 is extended. At this time, the first rotating shaft 346 drives the first winding roller 121 to rotate, and the first winding roller 121 winds up and releases the TAC film.

[0059] Simultaneously, air from the intake pipe 311 enters the receiving cylinder 393 through the first connecting pipe 393, and air from the receiving cylinder 393 enters the fixed cylinder 391 through the second connecting pipe 394. At this time, the air pushes the piston head 396 towards... Figure 9As the piston moves upward, the piston head 396 drives the movable rod 397 to retract into the fixed cylinder 391. At this time, when the second bevel gear 353 and the first bevel gear 352 disengage, the rotation of the first bevel gear 352 cannot drive the rotation of the second bevel gear 353. Simultaneously, the air in the receiving cylinder 393 enters the cavity 3511 through the third connecting pipe 395. The air pushes the first square rod 356 to extend. After one end of the first square rod 356 is inserted into the inner wall of the first square hole 3551, the second rotating shaft 351 drives the third rotating shaft 355 to rotate through the first square hole 3551. At this time, the third rotating shaft... The rotation directions of shaft 355 and the second rotating shaft 351 are the same. At this time, the third rotating shaft 355 drives the second winding roller 122 to rotate and wind up the protective film on the TAC film. At this time, the scraper 11 moves downward. The downward movement of the scraper 11 will tear off the protective film on the TAC film. At the same time as tearing off the protective film, the TAC film will be attached to the PVA film. This can reduce the exposure time of the TAC film in the air and avoid the adhesion of dust particles, which will affect the quality of the polarizing plate. TAC film can be attached to both sides of the PVA film at the same time, which helps to improve the production efficiency of the polarizing plate.

[0060] After the application is complete, the air pump draws air from the cylinder 31 through the air inlet pipe 311, causing the cylinder 31 to shorten and the scraper 11 to move upwards and then reset. At this time, the toothed plate 33 will still drive the gear 36 to rotate, but the direction of rotation of the gear 36 is opposite to before, and the belt ring 37 also rotates in the opposite direction. Under the action of the locking block 344, the ratchet 345 can only rotate in one direction, and the first rotating shaft 346 cannot rotate at this time to prevent the first roller 121 from rotating and peeling the applied TAC film off the PVA film.

[0061] At this time, when the first connecting pipe 393 also draws air from the receiving cylinder 393, the plug 396 inside the fixed cylinder 391 moves towards... Figure 9 The piston head 396 moves downwards, causing the moving rod 397 to move towards the center. Figure 9Extending downwards, the movable rod 397 pushes the second bevel gear 353 to move, causing it to mesh with the first bevel gear 352. The second bevel gear 353 also meshes with the third bevel gear 354. Simultaneously, the first square rod 356 retracts into the cavity 3511, and its end is pulled out of the first square hole 3551. At this time, the second rotating shaft 351 drives the first bevel gear 352 to rotate, the first bevel gear 352 drives the second bevel gear 353 to rotate, the second bevel gear 353 drives the third bevel gear 354 to rotate, and the third bevel gear 354 drives the third... The rotating shaft 355 rotates, and the rotation direction of the third rotating shaft 355 is opposite to that of the second rotating shaft 351. Since the rotation direction of the second rotating shaft 351 is opposite to that before, the rotation direction of the third rotating shaft 355 is the same as that of the third rotating shaft 355 when the cylinder 31 extends. At this time, the third rotating shaft 355 still drives the second winding roller 122 to rotate, and winds up the protective film on the TAC film. Because the scraper 11 moves upward, there will be excess part of the protective film on the previously taut TAC film. The rotation of the second winding roller 122 can wind it up and complete the reset.

Claims

1. A double-sided polarizing plate bonding device, characterized in that: include The attachment assembly (1) is symmetrically arranged in two sets. The attachment assembly (1) includes a scraper (11) and a roller (12). The scraper (11) has a triangular cross-section and a film-passing groove (111) is provided on the scraper (11). The protective film on the TAC film passes through the film-passing groove (111) from the bottom of the scraper (11). The scraper (11) has a chamfer on its edge. The roller (12) includes a first roller (121) and a second roller (122). The first roller (121) and the second roller (122) are arranged above the scraper (11). Adjustment component (2), the adjustment component (2) includes a fixed shaft (21), a first slider (22), a first telescopic rod (23), a first spring (24) and a movable block (25). The fixed shaft (21) passes through the scraper (11) and the first slider (22) is fixedly connected to both ends of the fixed shaft (21). The movable block (25) is provided with a through groove (251). The first slider (22) is slidably connected to the inner wall of the through groove (251). The first slider (22) is fixedly connected to one end of the first telescopic rod (23). The other end of the first telescopic rod (23) is fixedly connected to the inner wall of the through groove (251). The first spring (24) is sleeved on the first telescopic rod (23).

2. The polarizing plate double-sided bonding equipment as described in claim 1, characterized in that: It also includes a drive assembly (3), which includes a cylinder (31), a second slider (32), a toothed plate (33), a first rotating member (34), a second rotating member (35), a gear (36), a belt ring (37), and a drive shaft (38). One end of the cylinder (31) is fixedly connected to a movable block (25), and the two sides of the movable block (25) are fixedly connected to the second slider (32). The second slider (32) is fixedly connected to the toothed plate (33), and the toothed plate (33) meshes with the gear (36). The gear (36) is fixedly connected to the drive shaft (38). The drive shaft (38) is connected to the first rotating member (34) and the second rotating member (35) through the belt ring (37). The first rotating member (34) is connected to one end of the first roller (121), and the second rotating member (35) is connected to one end of the second roller (122).

3. The polarizing plate double-sided bonding equipment as described in claim 2, characterized in that: The first rotating component (34) includes a fixed plate (341), a second telescopic rod (342), a second spring (343), a locking block (344), a ratchet (345), and a first rotating shaft (346). The first rotating shaft (346) is connected to the inner wall of the belt ring (37). The first rotating shaft (346) is fixedly connected to the ratchet (345). The locking block (344) is set corresponding to the ratchet (345). The locking block (344) is fixedly connected to one end of the second telescopic rod (342). The other end of the second telescopic rod (342) is fixedly connected to the fixed plate (341). The second spring (343) is sleeved on the second telescopic rod (342).

4. The polarizing plate double-sided bonding equipment as described in claim 3, characterized in that: The second rotating component (35) includes a second rotating shaft (351), a first bevel gear (352), a second bevel gear (353), a third bevel gear (354), a third rotating shaft (355), and a first square rod (356). The second rotating shaft (351) is connected to the inner wall of the belt ring (37). The second rotating shaft (351) is fixedly connected to the first bevel gear (352). The first bevel gear (352) meshes with the second bevel gear (353). The second bevel gear (353) meshes with the third bevel gear (354). The third bevel gear (354) is fixedly connected to the third rotating shaft (355). The second rotating shaft (351) has a cavity (3511) inside. The inner wall of the cavity (3511) is slidably connected to the first square rod (356). The third rotating shaft (355) has a first square hole (3551) corresponding to the first square rod (356). The square rod (356) is slidably connected to the inner wall of the first square hole (3551).

5. The polarizing plate double-sided bonding equipment as described in claim 4, characterized in that: The drive assembly (3) further includes a control component (39), which includes a fixed cylinder (391), a first connecting pipe (393), a receiving cylinder (392), a second connecting pipe (394), a third connecting pipe (395), a piston head (396), and a movable rod (397). The piston head (396) is slidably connected to the inner wall of the fixed cylinder (391), and the movable rod (397) is fixedly connected to the piston head (396). The fixed cylinder (391) is connected to the receiving cylinder (392) through the second connecting pipe (394). The top of the receiving cylinder (392) is fixedly connected to one end of the first connecting pipe (393), and the receiving cylinder (392) is connected to the cavity (3511) through the third connecting pipe (395).

6. The polarizing plate double-sided bonding equipment as described in claim 5, characterized in that: It also includes a support assembly (4), which includes a top beam (41), a support column (42) and a base (43). The top beam (41) is fixedly connected to a cylinder (31). The top beam (41) is fixedly connected to one end of the support column (42), and the other end of the support column (42) is fixedly connected to the base (43). The top beam (41) is fixedly connected to a fixing plate (341). A first sliding groove (411) is provided on the top beam (41). A toothed plate (33) is slidably connected to the inner wall of the first sliding groove (411). A second sliding groove (421) is provided on the support column (42). A second slider (32) is slidably connected to the inner wall of the second sliding groove (421). A limit groove (4111) is provided on the inner wall of the first sliding groove (4111). A limit strip (331) is provided on the toothed plate (33) corresponding to the limit groove (4111). The limit strip (331) is slidably connected to the inner wall of the limit groove (4111).

7. The polarizing plate double-sided bonding equipment as described in claim 5, characterized in that: The cylinder (31) is fixedly connected to the intake pipe (311) at one end away from the movable block (25), and the intake pipe (311) is fixedly connected to the other end of the first connecting pipe (393).

8. The polarizing plate double-sided bonding equipment as described in claim 6, characterized in that: The top surface of the top beam (41) is fixedly connected to the bottom of the fixing rod (44), and the top of the fixing rod (44) is rotatably connected to the drive shaft (38).

9. The polarizing plate double-sided bonding equipment as described in claim 6, characterized in that: The top beam (41) is provided with a first receiving cavity (40), the second rotating shaft (351) and the third rotating shaft (355) are rotatably connected to the top beam (41), and the top of the fixed cylinder (391) and the receiving cylinder (392) are fixedly connected to the top wall of the first receiving cavity (40).

10. The polarizing plate double-sided bonding equipment as described in claim 4, characterized in that: The first rotating shaft (346) and the third rotating shaft (355) are fixedly connected to the second square rod (30) away from the belt ring (37). The first roller (121) and the second roller (122) are respectively provided with second square holes (10) corresponding to the second square rod (30). The second square rod (30) is slidably connected to the inner wall of the second square hole (10). The first roller (121) and the second roller (122) are provided with a second receiving cavity (123) at one end away from the second square hole (10). The inner wall of the second receiving cavity (123) is slidably connected to the mounting shaft (124). One end of the mounting shaft (124) is fixedly connected to one end of the third spring (125). The other end of the third spring (125) is fixedly connected to the inner end wall of the second receiving cavity (123). The other end of the mounting shaft (124) is rotatably connected to the top beam (41).

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