A film cutting edge device for a polarizing sheet

Abstract

The utility model relates to polarizing plate processing technical field especially relates to a polarizing plate diaphragm cutting edge device, including cutting drive platform, cutting drive platform is arranged with bottom support guide rail along the length direction, and bottom support guide rail is successively installed with diaphragm guiding device, cutting device and membrane drawing device, diaphragm guiding device includes the guiding drive seat of transverse movement and close or far away cutting device, and guiding drive seat is installed with bottom guide plate and top guide plate, wherein top guide plate can be longitudinally moved and tightly press diaphragm in bottom guide plate, the top guide plate of diaphragm guiding device can be longitudinally moved and tightly press diaphragm in bottom guide plate, can make diaphragm keep flat before cutting, avoid diaphragm wrinkle and influence cutting accuracy. Meanwhile, after membrane drawing device accurate pulling diaphragm to the length required, again by the double pressure tightly fixed of pressing device and top guide plate to diaphragm, ensure that diaphragm does not shift in the cutting process, thereby guarantee the accuracy of cutting size.

Description

Technical Field

[0001] This utility model relates to the field of polarizer processing technology, and in particular to a device for cutting the edge of a polarizer film. Background Technology

[0002] In the current polarizer manufacturing process, cutting is a crucial step. Polarizers are widely used in fields such as LCD displays, and their dimensional accuracy and flatness are subject to extremely high requirements. However, current polarizer cutting technology still has some shortcomings in this step. Specifically, to ensure cutting accuracy, the traditional cutting method usually involves fixing the four edges of the polarizer to the cutting board with tape. Although this fixing method seems simple, it has many problems in actual operation.

[0003] Existing technologies lack sufficient integration support and motion precision control for each functional module, making them prone to failure due to component shaking or coordination errors: the film guiding device, cutting device, and film stretching device may be installed on separate frames instead of being integrated based on the same bottom support guide rail. The vibrations of each device during operation interfere with each other, leading to increased film stretching positioning errors or deviation of the cutting blade trajectory. Utility Model Content

[0004] The purpose of this invention is to provide a device for cutting the edge of a polarizing film, addressing the shortcomings of existing technologies.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A film cutting device for a polarizing film includes a cutting drive table. The cutting drive table has a bottom support guide rail arranged along its length. A film guiding device, a cutting device, and a film pulling device are sequentially installed on the bottom support guide rail. The film guiding device includes a guide drive seat that moves laterally closer to or away from the cutting device. The guide drive seat is equipped with a bottom guide plate and a top guide plate. The top guide plate can move longitudinally to press the film tightly against the bottom guide plate.

[0007] The film stretching device includes a first film stretching drive seat and a second film stretching drive seat that move along the length of the bottom support guide rail. The top of the first film stretching drive seat is equipped with a pressing device that can longitudinally open and close to press the film. The top of the second film stretching drive seat is equipped with a transverse telescopic drive seat that can move laterally. The transverse telescopic drive seat is equipped with a clamping structure facing the cutting device. The clamping structure includes a pair of clamping fingers that move open and close.

[0008] Furthermore: The guide drive seat is equipped with a first lifting cylinder, the drive end of the first lifting cylinder is connected to the top guide plate, and the first lifting cylinder drives the top guide plate to move longitudinally closer to or away from the bottom guide plate.

[0009] Furthermore, the guide drive seat is also equipped with a longitudinally arranged support rod, a transverse beam is installed on the top of the support rod, and a guide pressure roller that cooperates with one of the bottom guide plates is installed at the bottom of the transverse beam.

[0010] Furthermore: the cutting device includes a top cutting blade and a bottom cutting blade, which are close to or far from each other.

[0011] Furthermore, the cutting device also includes a cutting drive seat, a cutting guide post is installed on the top of the cutting drive seat, a cutting top fixing seat is installed on the top of the cutting guide post, a first cutting seat connected to the top cutting blade is installed below the cutting top fixing seat; a second cutting seat connected to the bottom cutting blade is installed above the cutting drive seat; the first cutting seat and the second cutting seat are slidably connected to the cutting guide post respectively.

[0012] Furthermore: a longitudinally arranged first cutting telescopic cylinder is installed on the top fixing seat of the cutting machine, the drive end of the first cutting telescopic cylinder is connected to the first cutting seat, and a longitudinally arranged second cutting telescopic cylinder is installed on the cutting drive seat, the drive end of the second cutting telescopic cylinder is connected to the second cutting seat.

[0013] Furthermore: a sliding support seat for supporting the first film stretching drive seat and the second film stretching drive seat is slidably installed on the bottom support guide rail; a first linear module and a second linear module are installed on the cutting drive table parallel to the bottom support guide rail; the driving end of the first linear module is connected to the first film stretching drive seat; and the driving end of the second linear module is connected to the second film stretching drive seat.

[0014] Furthermore: the pressing device includes a pressing drive plate, a first pressing plate is installed below the pressing drive plate, a second pressing plate is installed at the bottom of the first pressing plate, and a pressing telescopic cylinder is installed at the bottom of the pressing drive plate, with the driving end of the pressing telescopic cylinder connected to the first pressing plate.

[0015] Furthermore: A transversely arranged film-stretching telescopic cylinder is installed on the top of the second film-stretching drive seat. The drive end of the film-stretching telescopic cylinder is connected to the film clamping structure, which includes the film clamping drive seat installed on the film-stretching telescopic cylinder.

[0016] Furthermore: a finger cylinder is installed on the clamping drive seat, and the clamping finger is installed on the drive end of the finger cylinder.

[0017] The beneficial effects of this invention are as follows: The top guide plate in the diaphragm guiding device can move longitudinally to press the diaphragm tightly against the bottom guide plate, ensuring that the diaphragm remains flat before cutting and preventing wrinkles from affecting cutting accuracy. Simultaneously, after the film pulling device precisely pulls the diaphragm to the required length, the film pressing device and the top guide plate double-press and fix the diaphragm, ensuring that the diaphragm will not shift during cutting, thereby guaranteeing the accuracy of the cutting dimensions.

[0018] The automatic film-pulling device is more efficient and faster than manual feeding. Moreover, after cutting, the first and second film-pulling drive seats can move simultaneously along the bottom support guide rail to transfer the cut film to the next process, realizing the automated connection between film cutting and transfer, reducing manual operation time and improving overall production efficiency.

[0019] In the film stretching device, the clamping fingers of the second film stretching drive seat can pass through the pressing device of the first film stretching drive seat under the drive of the transverse telescopic drive seat. This structural design allows the device to adapt to films of different widths and thicknesses. By adjusting the position of the clamping fingers and the pressure of the pressing device, films of various specifications can be cut, expanding the applicability of the device. The cutting length can also be adaptively adjusted according to the length of the polarizer, further improving its practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the diaphragm edge cutting device.

[0021] Figure 2 This is a schematic diagram of the diaphragm guiding device.

[0022] Figure 3 This is a schematic diagram of the cutting device.

[0023] Figure 4 This is a schematic diagram of the membrane stretching device.

[0024] The reference numerals in the figures include:

[0025] 1-Cutting drive table,

[0026] 10-Diaphragm guiding device, 11-Guide drive seat, 12-Bottom guide plate, 13-Top guide plate,

[0027] 14-First lifting cylinder, 15-Support rod, 16-Horizontal beam, 17-Guide pressure roller, 18-Tension spring,

[0028] 19- Lateral telescopic cylinder,

[0029] 2-Cutting device

[0030] 21-Top cutting blade, 22-Bottom cutting blade, 23-Cutting drive seat, 24-Cutting guide post,

[0031] 25-Top cutting bracket, 26-First cutting bracket, 27-Second cutting bracket

[0032] 28-First cutting telescopic cylinder, 29-Second cutting telescopic cylinder

[0033] 3-Membrane stretching device

[0034] 31-First film stretching drive seat, 32-Film pressing device, 33-Pressure pressing drive plate, 34-First pressure plate,

[0035] 35 - Second pressure plate, 36 - Pressing telescopic cylinder,

[0036] 4-Second membrane stretching drive seat,

[0037] 40- Lateral telescopic drive seat, 41-Membrane stretching telescopic cylinder, 42-Membrane clamping drive seat, 43-Finger cylinder,

[0038] 44-Clamping finger, 45-Sliding support base, 46-First linear module, 47-Second linear module

[0039] 48 - Bottom support rail. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings.

[0041] like Figure 1-4 As shown, a film cutting device for a polarizing film includes a cutting drive table 1. The cutting drive table 1 has a bottom support guide rail 48 arranged along its length. The bottom support guide rail 48 is sequentially equipped with a film guiding device 10, a cutting device 2, and a film pulling device 3. The film guiding device 10 includes a guide drive seat 11 that moves laterally closer to or further away from the cutting device 2. The guide drive seat 11 is equipped with a bottom guide plate 12 and a top guide plate 13, wherein the top guide plate 13 can move longitudinally to press the film tightly against the bottom guide plate 12. The film pulling device 3 includes a first film pulling drive seat 31 and a second film pulling drive seat 4 that move along the length of the bottom support guide rail 48. The top of the first film pulling drive seat 31 is equipped with a pressing device 32 that can open and close longitudinally to press the film tightly. The top of the second film pulling drive seat 4 is equipped with a lateral telescopic drive seat 40 that can move laterally. The lateral telescopic drive seat 40 is equipped with a clamping structure facing the cutting device 2. The clamping structure includes a pair of clamping fingers 44 that move open and close.

[0042] During operation, the rolled film is unwound into the film guiding device 10, passes through the bottom guide plate 12, and then passes through the cutting device 2. At the same time, the film pulling device 3 approaches the cutting device 2. The clamping fingers 44 of the second film pulling drive seat 4, driven by the transverse telescopic drive seat 40, pass through the pressing device 32 of the first film pulling drive seat 31 to clamp the film of the cutting device 2. Then, it is pulled outward. After being pulled to the required length, the pressing device 32 of the first film pulling drive seat 31 presses the film along the way. At the same time, the top guide plate 13 of the film guiding device 10 presses down to press the film. Then, the cutting device 2 works to cut and separate the film. The first film pulling drive seat 31 and the second film pulling drive seat 4 can move along the bottom support guide rail 48 at the same time to move the cut film, dock it with other structures, and transfer the cut film to the next process to be bonded to the polarizer.

[0043] The top guide plate 13 in the diaphragm guiding device 10 can move longitudinally to press the diaphragm tightly against the bottom guide plate 12, which keeps the diaphragm flat before cutting and avoids wrinkles affecting the cutting accuracy. At the same time, after the film pulling device 3 accurately pulls the diaphragm to the required length, the film pressing device 32 and the top guide plate 13 double-press and fix the diaphragm to ensure that the diaphragm will not shift during the cutting process, thereby ensuring the accuracy of the cutting size.

[0044] The automatic film-pulling device 3 pulls the film sheet more efficiently and quickly than manual feeding. Moreover, after cutting, the first film-pulling drive seat 31 and the second film-pulling drive seat 4 can move simultaneously along the bottom support guide rail 48 to transfer the cut film sheet to the next process, realizing the automated connection between film cutting and transfer, reducing manual operation time and improving overall production efficiency.

[0045] In the film stretching device 3, the clamping fingers 44 of the second film stretching drive seat 4 can pass through the pressing device 32 of the first film stretching drive seat 31 under the drive of the transverse telescopic drive seat 40. This structural design allows the device to adapt to films of different widths and thicknesses. By adjusting the position of the clamping fingers 44 and the pressure of the pressing device 32, films of various specifications can be cut, expanding the applicability of the device. The cutting length can also be adaptively adjusted according to the length of the polarizer, further improving its practicality.

[0046] Specifically, the cutting drive table 1 is equipped with a transverse telescopic cylinder 19, which is connected to the guide drive seat 11. The transverse telescopic cylinder 19 can drive the bottom guide plate 12 of the guide drive seat 11 to move closer to or away from the cutting device 2, realizing the progressive feeding of the film. The guide drive seat 11 is equipped with a first lifting cylinder 14, the drive end of which is connected to the top guide plate 13. The first lifting cylinder 14 drives the top guide plate 13 to move longitudinally closer to or away from the bottom guide plate 12. Before the film is pulled from the cutting device 2 to the required cutting length by the film pulling device 3, the first lifting cylinder 14 drives the top guide plate 13 to rise, allowing the film to be guided through. During cutting, it is necessary to press down to compress the continuous part of the film to prevent the film from springing back and causing discontinuity in the operation.

[0047] Furthermore, the guide drive seat 11 is also provided with a longitudinally arranged support rod 15, a transverse beam 16 is installed on the top of the support rod 15, and a tension spring 18 is installed on the guide drive seat 11 that is elastically connected to the transverse beam 16. The tension spring 18 is sleeved on the support rod 15, and a guide pressure roller 17 that cooperates with one of the bottom guide plates 12 is installed at the bottom of the transverse beam 16. The guide pressure roller 17 can elastically roll the bottom guide plate 12. When the diaphragm passes through the cutting device 2 along the diaphragm guide device 10, the guide pressure roller 17 always rolls the diaphragm to prevent the diaphragm from warping and wrinkling, ensuring the flatness and cutting accuracy during cutting, and ensuring the cutting quality.

[0048] Specifically, the cutting device 2 includes a top cutting blade 21 and a bottom cutting blade 22, which are close to or far from each other. The cutting device 2 also includes a cutting drive seat 23, on the top of which a cutting guide post 24 is mounted, and on the top of the cutting guide post 24 a cutting top fixing seat 25 is mounted. Below the cutting top fixing seat 25, a first cutting seat 26 connected to the top cutting blade 21 is mounted; above the cutting drive seat 23, a second cutting seat 27 connected to the bottom cutting blade 22 is mounted; the first cutting seat 26 and the second cutting seat 27 are slidably connected to the cutting guide post 24, respectively.

[0049] The cutting mode, in which the top cutting blade 21 and the bottom cutting blade 22 move in opposite directions, distributes the cutting pressure evenly on both sides of the film compared to traditional single-blade downward cutting. This avoids film stretching and deformation or tearing and burrs at the cut edges caused by excessive force on one side. It is especially suitable for the cutting requirements of thin films used for polarizing films, and can control the edge flatness error to a lower range. Both the first cutting seat 26 and the second cutting seat 27 slide along the cutting guide post 24 through the guide sleeve. The guide post provides a rigid linear reference for the movement of the blade holders, completely eliminating lateral offset or tilting of the blade holders due to force during the cutting process, and ensuring that the blade always moves along the preset trajectory.

[0050] Preferably, the top cutting mounting base 25 is equipped with a longitudinally arranged first cutting telescopic cylinder 28, the drive end of which is connected to the first cutting base 26. The cutting drive base 23 is equipped with a longitudinally arranged second cutting telescopic cylinder 29, the drive end of which is connected to the second cutting base 27. The first cutting telescopic cylinder 28 and the second cutting telescopic cylinder 29 independently drive the top and bottom cutting blades 22, respectively. Through a synchronous control system, such as a PLC or servo valve, the two are connected by signal to achieve millisecond-level synchronous response of the dual blade movement. Synchronous drive can avoid diaphragm delamination caused by excessive pressure on one side, ensuring that there are no burrs on the cut edges.

[0051] Specifically, a sliding support seat 45 for supporting the first film-pulling drive seat 31 and the second film-pulling drive seat 4 is slidably mounted on the bottom support guide rail 48. The cutting drive table 1 is equipped with a first linear module 46 and a second linear module 47 parallel to the bottom support guide rail 48. The driving end of the first linear module 46 is connected to the first film-pulling drive seat 31, and the driving end of the second linear module 47 is connected to the second film-pulling drive seat 4. The first linear module 46 and the second linear module 47 independently drive the first film-pulling drive seat 31 and the second film-pulling drive seat 4 to move along the bottom support guide rail. The first film-pulling drive seat 31 and the second film-pulling drive seat 4 can respectively provide dual-point support for the pulled-out film. When transferring the film, the other end of the film will not fall down, so as to ensure that the film can be moved laterally for transfer by the film-applying mechanism in the next process.

[0052] Furthermore, the film pressing device 32 includes a pressing drive plate 33, a first pressure plate 34 is installed below the pressing drive plate 33, a second pressure plate 35 is installed at the bottom of the first pressure plate 34, and a pressing telescopic cylinder 36 is installed at the bottom of the pressing drive plate 33. The driving end of the pressing telescopic cylinder 36 is connected to the first pressure plate 34. In this embodiment, when the film is pulled, the pressing telescopic cylinder 36 drives the first pressure plate 34 to retract and rise, allowing the clamping fingers 44 to pass through. The clamping fingers 44 of the second film pulling drive seat 4 pass through the gap between the first pressure plate 34 and the second pressure plate 35 under the drive of the transverse telescopic drive seat 40, clamping the end of the film located in the cutting device 2, and then moving away. After being pulled to the required size, the film pressing device 32 of the first film pulling drive seat 31 works to clamp the other end of the film. During cutting, both ends of the film are clamped, and one end will not fall down.

[0053] Furthermore, a transversely arranged film-stretching telescopic cylinder 41 is installed on the top of the second film-stretching drive seat 4. The driving end of the film-stretching telescopic cylinder 41 is connected to the transverse telescopic drive seat 40. The film clamping structure is installed on the transverse telescopic drive seat 40. The film clamping structure includes a film clamping drive seat 42 installed on the transverse telescopic drive seat 40. Under the drive of the film-stretching telescopic cylinder 41, the film clamping drive seat 42 can pass through the film pressing device 32, clamp the film of the cutting device 2, and then pull it outward to achieve dragging.

[0054] Furthermore, the membrane clamping drive seat 42 is equipped with a finger cylinder 43, and the membrane clamping finger 44 is installed on the drive end of the finger cylinder 43; the finger cylinder 43 has two drive ends, which are close to or far from each other. Under the drive of the finger cylinder 43, the membrane clamping finger 44 can open and close to clamp one end of the membrane to achieve dragging.

[0055] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0056] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A film cutting device for polarizing film, comprising a cutting drive stage, a bottom support guide rail arranged along the length direction of the cutting drive stage, and a film guiding device, a cutting device, and a film pulling device sequentially mounted on the bottom support guide rail, characterized in that: The diaphragm guiding device includes a guide drive seat that moves laterally toward or away from the cutting device. The guide drive seat is equipped with a bottom guide plate and a top guide plate, wherein the top guide plate is capable of moving longitudinally to press the diaphragm tightly against the bottom guide plate. The film stretching device includes a first film stretching drive seat and a second film stretching drive seat that move along the length of the bottom support guide rail. The top of the first film stretching drive seat is equipped with a pressing device that can longitudinally open and close to press the film. The top of the second film stretching drive seat is equipped with a transverse telescopic drive seat that can move laterally. The transverse telescopic drive seat is equipped with a clamping structure facing the cutting device. The clamping structure includes a pair of clamping fingers that move open and close.

2. The apparatus according to claim 1, wherein: The guide drive seat is equipped with a first lifting cylinder. The drive end of the first lifting cylinder is connected to the top guide plate. The first lifting cylinder drives the top guide plate to move longitudinally closer to or away from the bottom guide plate.

3. The apparatus according to claim 2, wherein: The guide drive seat is also provided with a longitudinally arranged support rod, a transverse beam is installed on the top of the support rod, and a guide pressure roller that cooperates with one of the bottom guide plates is installed at the bottom of the transverse beam.

4. The apparatus according to claim 1, wherein: The cutting device includes a top cutting blade and a bottom cutting blade, which are close to or far from each other.

5. The apparatus according to claim 4, wherein: The cutting device further includes a cutting drive seat, a cutting guide post is installed on the top of the cutting drive seat, a cutting top fixing seat is installed on the top of the cutting guide post, a first cutting seat connected to the top cutting blade is installed below the cutting top fixing seat; a second cutting seat connected to the bottom cutting blade is installed above the cutting drive seat; the first cutting seat and the second cutting seat are slidably connected to the cutting guide post respectively.

6. The apparatus according to claim 5, wherein: The top fixing seat for cutting is equipped with a longitudinally arranged first cutting telescopic cylinder, the drive end of which is connected to the first cutting seat. The cutting drive seat is equipped with a longitudinally arranged second cutting telescopic cylinder, the drive end of which is connected to the second cutting seat.

7. The apparatus according to claim 1, wherein: The bottom support guide rail is slidably mounted with a sliding support seat for supporting the first film stretching drive seat and the second film stretching drive seat. The cutting drive table is equipped with a first linear module and a second linear module parallel to the bottom support guide rail. The driving end of the first linear module is connected to the first film stretching drive seat, and the driving end of the second linear module is connected to the second film stretching drive seat.

8. The apparatus according to claim 7, wherein: The pressing device includes a pressing drive plate, a first pressing plate is installed below the pressing drive plate, a second pressing plate is installed at the bottom of the first pressing plate, and a pressing telescopic cylinder is installed at the bottom of the pressing drive plate. The driving end of the pressing telescopic cylinder is connected to the first pressing plate.

9. The apparatus according to claim 8, wherein: The second membrane stretching drive seat has a horizontally arranged membrane stretching telescopic cylinder installed on its top. The drive end of the membrane stretching telescopic cylinder is connected to the membrane clamping structure, which includes the membrane clamping drive seat installed on the membrane stretching telescopic cylinder.

10. The apparatus according to claim 9, wherein: The clamping drive seat is equipped with a finger cylinder, and the clamping finger is installed on the drive end of the finger cylinder.

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