Film tearing process of roll-cooperating polarizing plate protection film

Abstract

The application discloses a film tearing process of a roll-clamping cooperative polaroid protection film, which comprises the following steps: S1. angle lifting; S2. clamping; S3. separating. The application is characterized in that: on one hand, based on the adhesion, self-rotation and forward movement of the glue roller, the two roll-ups are formed, the widened inner support and the guiding cooperation are formed by the profiling clamping arm, the synchronous and uniform stress is realized, the edge breakage is avoided, the lifting width is not limited by the roller, and the reliable separation of the whole edge can be completed at one time; on the other hand, based on the arc length limitation of the two roll-ups, the adverse defects caused by the too short or too long arc length of the roll edge are eliminated, the clamping is carried out without changing the roll edge state, the deformation or edge tearing caused by the roll edge shearing between the roll clamps is avoided, and thus the flat tearing track, the uniform and controllable tearing force are ensured, and finally the efficient and non-damage one-time overall tearing is realized.

Description

Technical Field

[0001] This invention belongs to the field of display technology, specifically relating to a peeling process for a roll-to-roll synergistic polarizer protective film. Background Technology

[0002] Polarizing films are key components in display modules such as liquid crystal displays (LCDs). Polarizing films are mainly composed of multiple thin film composites, typically including a polarizing core layer (PVA), protective films on both sides (TAC / PMMA), and pressure-sensitive adhesive (PSA). These materials are very thin and have low modulus, thus possessing certain flexible properties (for example, as the length of the overhang at the self-actuating point increases, the overhanging end will droop and bend). In addition, the surface film (protective film) needs to be cleaned and peeled off before the polarizing film is bonded.

[0003] Currently, the protective film peeling process basically uses a combination of roller adhesive and forward movement to lift the corners of the protective film, then a clamp is used to hold the rolled-up film, and finally, based on the relative movement of the clamp and the polarizer, the protective film is peeled off the surface of the polarizer. Although this peeling method is feasible, it has the following drawbacks in actual operation: 1. Due to the roller's rolling action, the edge of the lifted protective film forms an arch. The adhesive on the roller and the edge of the film lifted by the roller experience completely different forces. This uneven lifting makes it difficult for the subsequent clamp to make stable contact with all positions on the same horizontal plane. It is very easy to cause one side to be stressed first and the other side to lag behind. This directly leads to frequent occurrences of edge breakage, making it impossible to peel the film completely in one go. This seriously affects the efficiency and quality of film peeling. At the same time, the lifting width is affected by the roller width. Once the entire edge cannot be lifted, the success rate of tearing is even lower. 2. If the arc length of the protective film rolled up by the roller is too small, this usually indicates insufficient forward movement of the roller or excessive adhesive strength, preventing the film from fully separating from the substrate. This results in a short or insufficiently curved free end for clamping, meaning the clamping head may only be able to grip the very edge of the film, or even fail to fully engage with the film layer. This not only leads to tearing failure but may also cause a sudden change in tearing force, resulting in unexpected breakage of the protective film. Furthermore, the tearing trajectory will be skewed from the start, leading to wavy lines or edge damage after the entire film is torn off. If the arc length of the protective film rolled up by the roller is too small... In cases of excessive drooping, this usually manifests as the roller moving too far forward, or the adhesive being too weak, causing the diaphragm to sag excessively, resulting in an excessively large drooping arc or an excessively long overhanging section. At the moment the clamps hold the diaphragm and begin pulling, the drooping diaphragm will wobble irregularly. This wobble may cause the protective film to undergo plastic deformation or even fold near the clamping point. Once folded, it is difficult to control the tearing angle and stress during subsequent film tearing, which not only increases the difficulty of tearing the film but also causes the film to be pulled off-center. At the same time, at the moment of clamping, the clamps will relatively peel the diaphragm off the rollers, which will also increase the shear deformation rate of the diaphragm. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fully improved peeling process for a roll-and-clamp coordinated polarizer protective film.

[0005] To achieve the above objectives, the present invention adopts the following solution: A film-tearing process for a roll-and-clamp coordinated polarizer protective film, employing a film-tearing device comprising a positioning unit and a film-tearing unit. The positioning unit includes a negative pressure adsorption platform, and the film-tearing unit includes a film-tearing module and a power module. The film-tearing reference is a side edge of the polarizer along a certain length. The film-tearing module includes a film-tearing clamp that raises the edge of the reference by an equal arc length. The film-tearing clamp includes a raised corner portion and a clamping portion. The raised corner portion includes a self-rotating rubber roller, a lifting device that drives the roller's lifting and lowering motion, and a rotation power unit. The clamping portion includes a front conforming clamp arm and a rear conforming clamp arm based on the rubber roller's shape layout, and a clamping arm power unit. The process includes the following steps: S1. Upturned corner The polarizing film is laid flat and adsorbed on the negative pressure adsorption platform. The power module drives the film tearing module to move to the position of the reference side. Based on the downward pressure of the rubber roller, the rubber roller is first attached to the reference edge. Then, the rotation and forward synchronous movement of the rubber roller form the film on the reference side into a curled corner. The arc length of the curled corner is L1, and π / 4≤L1≤π / 2. S2. Clamping While forming the warp angle, the positions of the front and rear contouring clamps are adjusted simultaneously. The inner wall of the warp angle is supported by the contouring surface of the front contouring clamp and the roller surface of the rubber roller. At the same time, the inner wall of the film edge on the reference side is rolled up with an equal arc length based on the secondary rotation of the rubber roller and the inner support of the contouring surface. Then, the film edge is aligned and clamped while maintaining the rolled-up posture. The arc length of the warp angle rolled up by the secondary rotation of the rubber roller is L2, and π / 4≤L2≤π / 2. S3. Uncover Maintaining the film roll clamp posture, the power module drives the film tearing module to move towards the reference opposite side to gradually peel off the protective film.

[0006] Preferably, in step S1, the bottom edge of the rubber roller is aligned vertically with the reference rear edge before the rubber roller is pressed down for bonding. This ensures that the starting positions are the same, avoids deviations in the winding path caused by the start, which would affect the winding of equal arc length, and also prevents frequent occurrences of tensile deformation or breakage due to uneven surface winding force.

[0007] Furthermore, the rubber roller does not rotate during the bonding process. It only rotates after bonding is complete, and the rotation direction cooperates with the forward direction to wind the reference point upwards around the rear of the rubber roller. This implicitly suggests that although the rubber roller is a rotating structure, its rotation is controlled; when it rotates and by what angle are predetermined by design. Therefore, in this application, to accurately control the winding arc length, it is in a non-rotating state before bonding. Rotation is only initiated after bonding; that is, a rotary motor is used to independently control the direction and rotation angle.

[0008] According to a specific embodiment and preferred aspect of the present invention, the front conforming clamp arm forms a rearward arched arc-shaped protrusion from its lower end, and the lower end of the rear conforming clamp arm forms an arc-shaped groove matching the arc-shaped protrusion. Before the secondary rotation of the rubber roller in step S2, the arc-shaped protrusion supports the inner wall of the curved corner from within the arc-shaped surface. Here, based on the inner support of the arc-shaped protrusion, not only is the width of the roll-up widened, but also, with the adhering guidance of the roll-up, the entire reference edge is more effectively rolled up (e.g., rolled up with equal arc length, which is the optimal state).

[0009] Preferably, before clamping, based on the rotation of the rubber roller, the edge of the film continues to roll up, and under the support and guidance of the arc-shaped surface, the rear conforming clamping arm synchronously approaches the front conforming clamping arm. Simultaneously, as the rubber roller stops rotating, the rear and front conforming clamping arms clamp the rolled edge of the film relative to each other. While the rubber roller is winding a second time, the rear conforming clamping arm moves synchronously to prepare for clamping. When the rubber roller stops rotating, the rear and front conforming clamping arms clamp each other relative to each other without changing the rolled-up posture.

[0010] In some specific embodiments, the arc-shaped protrusion is semi-cylindrical, and the cross-sectional area of ​​the arc-shaped protrusion is equal to half the cross-sectional area of ​​the rubber roller, π / 2≤L1+L2≤π. That is, the cross-section of the arc-shaped protrusion is semi-circular, the cross-section of the rubber roller is circular, the centers of the two are aligned, and the radii of the two are also equal.

[0011] Furthermore, 3π / 4 ≤ L1 + L2 ≤ π. At this roll-up arc length, defects such as excessively short or long rolled edges are eliminated. This not only facilitates edge clamping and relatively uniform tearing but also eliminates motion interference between the roll clamps. Simultaneously, it reduces pulling or deformation during the film tearing process and significantly increases the success rate of a single, complete film tearing operation.

[0012] According to another specific embodiment and preferred aspect of the present invention, in step S3, the film-tearing module moves by either gradually peeling off the protective film by moving forward toward the opposite side of the reference or by gradually peeling off the protective film by a combination of forward and upward movement toward the opposite side of the reference. That is, during the film-tearing process, the film can be peeled off by either upward pulling combined with forward movement, or by tearing horizontally at the same height.

[0013] According to another specific embodiment and preferred aspect of the invention, there is at least one film-tearing module, and one or more upturned corner portions are selected based on the length of the reference side, while the assisted rolling clamp based on the alignment clamping portion rolls up the entire reference side with an equal arc length. Here, the selection is based on the length of the reference side. If the reference length is short, one film-tearing module can achieve equal arc length rolling of the entire edge; adaptive selection is made as the reference length changes to increase the success rate of film tearing.

[0014] Preferably, there are multiple film-tearing modules, and they are evenly distributed based on the center of the reference side. This evenly distributed pattern is more conducive to rolling up the entire film edge with equal arc length.

[0015] According to another specific embodiment and preferred aspect of the invention, the film-peeling device further includes an ion-blowing unit, wherein the ion-blowing unit includes an ion chamber arranged along a reference length direction, a plurality of nozzles arranged side-by-side at intervals along the length direction of the ion chamber, and an ion supply component, wherein the ion gas flow ejected from the plurality of nozzles is blown towards the area between the torn protective film and the polarizer. Here, the air knife formed by the ion gas flow not only effectively assists in the tearing of the protective film, but also eliminates static electricity and dust on the surfaces of the protective film and the polarizer.

[0016] In some specific implementations, the ion chamber angle is adjustable, that is, the angle between the air knife and the polarizer surface is adjustable and can be adjusted according to actual needs. Generally, the angle formed is 30~45°, and the tearing effect formed at this angle is the best.

[0017] According to another specific embodiment and preferred aspect of the invention, the tearing modules located at both ends are defined as corner tearing modules, and the remaining tearing modules are defined as side tearing modules. Each corner tearing module rotates around the vertical direction to adjust its angle to switch between corner tearing and side tearing. The tearing modules based on the side and / or corners cooperate to roll up a corner, roll up the entire side, or roll up the entire side and two corners. Here, based on the operational needs of the implementation condition, tearing can be performed by moving diagonally to the opposite side with a corner as a reference, under the combined action of the roll clamps; or by directly rolling up the entire reference side and moving to the opposite side to tear; or by moving to the opposite side with the entire reference side and two corners simultaneously raised.

[0018] Preferably, in step S1, the corner tearing module rotates to switch to a side tearing module, and multiple side tearing modules simultaneously roll up the entire reference side with an equal arc length. The position switching of the corner tearing module satisfies the tearing requirements in different modes.

[0019] Furthermore, there are three film-tearing modules arranged side-by-side with equal spacing. In short, the use of three film-tearing modules not only meets the basic needs of tearing film at edges and / or corners to increase the practicality of film tearing, but also the equal spacing provides a more uniform tearing force for the roll clamping and tearing, thereby improving the tearing success rate.

[0020] According to another specific embodiment and preferred aspect of the invention, the film-tearing process further includes the step of: S4. film removal, which involves separating the torn protective film from the tear end formed by the rubber roller and the clamping part. In short, film removal is the collection of the torn film, that is, the detachment of the protective film from the film-tearing module.

[0021] Preferably, during the film removal process, external stress assists, while the reverse rotation of the rubber roller and the free hanging of the protective film work together to detach the protective film from the film-tearing module. In most cases, once the pulling end detaches, the freely hanging protective film can fall freely to complete the film removal and collection. However, the main reason for achieving relative detachment of the pulling end is that the rubber roller has adhesive on the front and back of the protective film, and the back of the protective film has adhesive that adheres to it. To completely detach it, both rollers need to work together: one uses a feeding / rewinding method for unwinding, and the other uses external stress assistance, combined with its own free hanging gravity pulling, to smoothly detach the protective film from the pulling end and achieve collection.

[0022] Furthermore, airflow holes are provided in the clamping portion of the rear contouring arm. During clamping in step S2, the protective film closes the airflow holes to adhere to the clamping surface. During demolding in step S4, airflow holes allow air to pass through and blow towards the protective film, cooperating with the reverse rotation of the rubber roller. The airflow holes effectively reduce the contact area during clamping to decrease adhesive force, and the airflow impact smoothly detaches the protective film from the rear contouring arm. Simultaneously, the airflow also facilitates the removal of the protective film and the rubber roller.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the current polarizer film peeling process, the edge of the lifted protective film forms an arch due to the roller's rolling action. The adhesive adhered to the roller and the edge lifted by the roller experience completely different forces. This uneven lifting makes it difficult for the subsequent clamps to stably contact all positions on the same horizontal plane, easily causing one side to be stressed first and the other side to lag behind. This directly leads to frequent edge breakage, preventing complete peeling in one go, severely impacting peeling efficiency and quality. Furthermore, the lifting width is affected by the roller's width; if the entire edge cannot be lifted, the peeling success rate is even lower. Additionally, if the arc length of the protective film rolled up by the roller is too small, this usually manifests as the roller... Insufficient forward movement distance or excessive adhesive strength prevents the membrane from fully separating from the substrate, resulting in a short or insufficiently curved free end for clamping. In this case, the clamping head may only be able to grip the very edge of the membrane, or even fail to fully engage with the membrane layer. This not only leads to tearing failure but may also cause a sudden change in tearing force, resulting in unexpected breakage of the protective film. Furthermore, the tearing trajectory is skewed from the start, leading to wavy lines or edge damage after the entire membrane is torn off. If the protective film arc length rolled up by the roller is too large, this usually manifests as an excessively long forward movement distance of the roller or weak adhesive strength causing the membrane to sag excessively, forming an excessively large sag arc or an excessively long overhang. At the moment the clamping head grips and initiates the pulling action, the drooping film will experience irregular swaying. This swaying may cause plastic deformation or even folding of the protective film near the clamping point. Once folded, the tearing angle and stress are difficult to control during subsequent film removal, not only increasing the difficulty of film removal but also causing pulling of the film. At the same time, at the moment of clamping, the clamping head will relatively peel the film off the roller, which will also increase the shear deformation rate of the film. The present invention, based on the overall design of the film removal process of the roll-clamp cooperative polarizer protective film, cleverly solves the shortcomings and defects of the prior art. With this process, firstly, the polarizer is laid flat and adsorbed on the negative pressure adsorption platform, and the power module drives the film removal module to move to the reference position. The film is positioned on the side, and the lowered rubber roller is used to first adhere the rubber roller to the reference edge. Then, the rotation and forward synchronous movement of the rubber roller form a warp angle on the reference side. The arc length of the warp angle is L1, and π / 4≤L1≤π / 2. Secondly, while forming the warp angle, the positions of the front and rear contouring clamps are adjusted simultaneously. The inner wall of the warp angle is supported by the contouring surface of the front contouring clamp and the roller surface of the rubber roller. At the same time, the film edge on the reference side is rolled up with an equal arc length based on the secondary rotation of the rubber roller and the inner support of the contouring surface. Then, the film edge is aligned and clamped while maintaining the rolled-up posture. The arc length of the warp angle rolled up by the secondary rotation of the rubber roller is L2, and π / 4≤L1≤π / 2.Finally, maintaining the film roll clamp posture, the power module drives the film tearing module to move towards the reference opposite side to gradually peel off the protective film. Therefore, compared with the prior art, this invention, on the one hand, is based on the adhesive, rotation, and forward movement of the rubber roller, followed by the widened inner support and guiding cooperation formed by the contour clamping arm, to achieve synchronous and uniform force, avoid edge breakage, and the lifting width is not limited by the roller, enabling reliable separation of the entire edge in one go; on the other hand, based on the arc length limitation of the two rolls, it eliminates the adverse defects caused by excessively short or long edge arc lengths, and the clamping without changing the edge state avoids edge shearing caused by the roll clamps, resulting in deformation or edge tearing, thereby ensuring a straight tearing trajectory and uniform and controllable tearing force, ultimately achieving efficient, damage-free, and complete tearing in one go. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the film-peeling device in this embodiment; Figure 2 for Figure 1 Simplified diagram; Figure 3 for Figure 2 Schematic diagram of the structure of the tear-off film module; Figure 4 for Figure 3 Front view diagram; Figure 5 for Figure 4 A left-view diagram; Figure 6 for Figure 4 A diagram showing the view from the right. Figure 7 This is a diagram showing the state of the rubber roller and clamping arm during the warping in this embodiment (first roll-up); Figure 8 This is a diagram showing the state of the rubber roller and clamping arm during the warping angle in this embodiment (second roll-up); Figure 9 This is a diagram showing the state of the clamping roller and clamping arm in this embodiment; Figure 10 This is a diagram showing the state of the clamping and tearing mechanism of the rubber roller and clamping arm in this embodiment; Among them: 1. Positioning unit; 10. Negative pressure adsorption platform; 2. Film tearing unit; 20. Film tearing module; 200. Mold base; 201. Film tearing chuck; a. Corner section; a1. Rubber roller; a2. Lifter; a3. Rotation power unit; b. Clamping section; b1. Front contouring clamping arm; b10. Arc-shaped protrusion; b2. Rear contouring clamping arm; b20. Arc-shaped groove; b3. Clamping arm power unit; 21. Power module; 3. Ion purging unit; 30. Ion chamber; 31. Nozzle; 4. Airflow impact unit; 40. Air chamber; 41. Air nozzle; s. Airflow hole; G, frame; p, polarizer; m, protective film. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0030] like Figures 1 to 6 As shown, the film-tearing process of the roll-and-clamp cooperative polarizer protective film involved in this embodiment uses a film-tearing device including a positioning unit 1, a film-tearing unit 2, an ion blowing unit 3, and an airflow impact unit 4.

[0031] Specifically, the polarizer p is square, with one long side of the polarizer p serving as the starting point for film tearing. The positioning unit 1 includes a negative pressure adsorption platform 10 and a negative pressure power source, wherein the polarizer p is adsorbed and positioned on the negative pressure adsorption platform 10 from the bottom surface.

[0032] The film-tearing unit 2 includes a film-tearing module 20 and a power module 21. The number of film-tearing modules 20 is arranged based on the length of a reference. In this example, there are three film-tearing modules 20, which are arranged side by side with intervals. The power module 21 is used to drive the film-tearing modules 20 to move in the XYZ three-axis coordinate system, and is also the power source for tearing.

[0033] In some specific embodiments, three film-tearing modules 20 are installed on the same frame G. The two film-tearing modules 20 located at both ends are defined as corner film-tearing modules, and the middle film-tearing module 20 is defined as a side film-tearing module. The corner film-tearing module can be rotated and adjusted around the Z-axis, that is, the corner film-tearing module can also be switched to a side film-tearing module (it can be locked after rotation). In short, depending on actual needs, all three film-tearing modules 20 are side film-tearing modules, and any one, any two, or all of them can be selected for film-tearing operations; or two of the three film-tearing modules 20 are corner film-tearing modules and one is a side film-tearing module, that is, the film is rolled up simultaneously at the two corners and the side for film-tearing operations; or only one corner film-tearing module is used, that is, the corner is rolled up and the film is torn towards the opposite corner (the opposite corner) for film-tearing operations.

[0034] In this example, all three film-tearing modules 20 are side-tear film-tearing modules, and one of them is selected for the film-tearing operation. Each film-tearing module 20 includes a mold base 200 and a film-tearing clamp 201 for raising the edge of the reference point by an equal arc length. The film-tearing clamp 201 includes a lifting corner a and a clamping part b. The lifting corner a includes a self-rotating rubber roller a1, a lifting device a2 that drives the rubber roller a1 to move up and down, and a self-rotating power unit a3. The clamping part b includes components based on the rubber roller a1... The front and rear contoured clamping arms b1 and b2, and the clamping arm power unit b3 are designed and arranged. The front contoured clamping arm b1 forms an arc-shaped protrusion b10 that arches backward from the lower end. The lower end of the rear contoured clamping arm b2 forms an arc-shaped groove b20 that matches the arc-shaped protrusion b10. The arc-shaped protrusion b10 is semi-cylindrical, that is, the cross-section of the arc-shaped protrusion b10 is semi-circular, the cross-section of the rubber roller a1 is circular, the centers of the two are aligned, and the radii of the two are also equal.

[0035] In some specific embodiments, an airflow impact unit 4 is also provided at the lower end of the rear contoured clamping arm b2 where the arc-shaped groove b20 is located. Specifically, multiple airflow holes s are formed inward from the groove surface of the arc-shaped groove b20. The airflow impact unit 4 includes an air chamber 40, an air nozzle 41, and an air pump that are connected to the multiple airflow holes s. The airflow is pumped into the air chamber 40 through the air nozzle 41 and then ejected from the airflow holes s to form an impact to blow away the protective film m that is adhered to the arc-shaped groove b20.

[0036] The ion blowing unit 3 includes an ion chamber 30 arranged along a reference length direction, multiple nozzles 31 arranged side-by-side at intervals along the length of the ion chamber 30, and an ion supply component. Ionized gas streams ejected from the multiple nozzles 31 are directed towards the area between the torn protective film m and the polarizer p. Here, the air knife formed by the ionized gas stream not only effectively assists in the tearing of the protective film, but also eliminates static electricity and dust on the surfaces of the protective film and the polarizer p. In this example, the ion chamber 30 is mounted on the mold base 200 via a rotating connector; that is, the angle between the air knife and the surface of the polarizer p is adjustable. Once the angle is adjusted, the angle and distance between the air knife and the polarizer p remain unchanged, thus maintaining the same auxiliary tearing conditions. Generally, the resulting angle is 30~45°, at which the tearing effect is optimal.

[0037] Combination Figures 7 to 10 As shown, the implementation process of this embodiment is as follows: S1. Upturned corner The polarizer p is laid flat and adsorbed onto the negative pressure adsorption platform 10. The power module 21 drives the film tearing module 20 to move to the position of the reference side. Based on the downward pressure of the rubber roller a1, the rubber roller a1 is first attached to the reference edge. Then, the rotation and forward synchronous movement of the rubber roller a1 form a warp corner on the reference side. The arc length of the warp corner rolled up for the first time is L1, and L1=π / 2. S2. Clamping While forming the warp angle, the positions of the front contouring clamping arm b1 and the rear contouring clamping arm b2 are adjusted simultaneously. Based on the inner wall of the warp angle, which is aligned with the left and right sides of the roller surface of the rubber roller a1 by the arc protrusion b10 of the front contouring clamping arm b1, and the inner wall of the warp angle, which is supported by the second rotation of the rubber roller a1 and the inner support and guidance of the arc protrusion b10, the edge of the film on the reference side is rolled up with an overall arc length of equal length. Then, the film edge is aligned and clamped while maintaining the rolled-up posture. The arc length of the warp angle rolled up by the second rotation of the rubber roller a1 is L2, L2=π / 2, that is, the arc length of the two windings is π. S3. Uncover Maintaining the film roll clamp posture, the power module 21 drives the film tearing module 20 to move toward the reference opposite side to gradually peel off the protective film; S4. Demolding The torn protective film m is detached from the tearing end formed by the rubber roller a1 and the clamping part b.

[0038] Specifically, in step S1, after the bottom edge of the rubber roller a1 is aligned with the rear edge of the reference, the rubber roller a1 is pressed down to ensure that the starting position is the same, avoiding deviation of the winding path caused by the start, which would affect the winding of equal arc length. This also prevents frequent tensile deformation or breakage due to uneven surface winding force. Furthermore, the rubber roller a1 does not rotate during the bonding process. It only rotates after bonding is complete, and the rotation direction cooperates with the forward direction to wind the reference upwards around the rear of the rubber roller a1. This implicitly indicates that although the rubber roller is a rotating structure, its rotation is controlled. When to rotate and by what angle are designed. Therefore, in this application, to accurately control the winding arc length, it is in a non-rotating state before gluing. Rotation is only initiated after gluing; that is, a rotating motor is used to independently control the direction and rotation angle. Furthermore, based on the inner support of the arc-shaped protrusion b10, not only is the width of the roll-up increased, but also the entire reference edge is more effectively rolled up (e.g., rolled up with equal arc length, which is the optimal state) as the roll-up guides the film. Simultaneously, before clamping, based on the rotation of the rubber roller a1, the film edge continues to roll up, and under the inner support and guidance of the arc-shaped surface, the rear contouring clamping arm b2 synchronously approaches the front contouring clamping arm b1. At the same time, as the rubber roller a1 stops rotating, the rear contouring clamping arm b2 and the front contouring clamping arm b1 clamp the rolled edge of the film relative to each other. While the rubber roller a1 is rolling up a second time, the rear contouring clamping arm b2 moves synchronously to prepare for clamping. When the rubber roller a1 stops rotating, the rear contouring clamping arm b2 and the front contouring clamping arm b1 clamp relative to each other without changing the rolled-up posture. In short, this roll-up arc length eliminates the defects of excessively short or long roll edges, which not only facilitates the roll edge clamping and relatively uniform tearing, but also eliminates motion interference between the roll clamps. It also reduces the pulling or deformation during the film tearing process and significantly increases the success rate of a single full film tearing.

[0039] In step S3, the tearing module 20 moves by either gradually peeling off the protective film m by moving forward towards the opposite side of the reference or by gradually peeling off the protective film m by moving forward and upward in coordination (this method is chosen in this example). That is, during the tearing process, the film can be torn off by pulling upward in conjunction with moving forward, or by tearing horizontally at the same height. Simultaneously, during the tearing process, an air knife is formed based on the ion flow, and the air knife blows between the torn protective film m and the polarizer p. In other words, the air knife not only effectively assists in tearing off the protective film, but the ion flow also eliminates static electricity and dust on the surface of the protective film and the polarizer. In some specific embodiments, the ion chamber angle is adjustable, that is, the angle between the air knife and the polarizer surface is adjustable, and can be adjusted according to actual needs. Generally, the angle formed is 30~45°, and the tearing effect is best at this angle (30° in this example).

[0040] In step S4, during the film removal process, the protective film is detached from the tearing module by the assistance of external stress, the reverse rotation of the rubber roller a1, and the free hanging of the protective film m. Normally, once the pulling end detaches, the freely hanging protective film can fall freely to complete the film removal and collection. However, the main reason for achieving relative detachment of the pulling end is that the rubber roller has adhesive on the front and back of the protective film, and the back of the protective film has adhesive that adheres to it. To completely detach it, both rollers need to work together: one uses a feeding / rewinding method for unwinding, and the other uses external stress assistance, combined with the free hanging gravity pulling, to smoothly detach the protective film from the pulling end and collect the protective film m. During demolding, the air vents s allow air to flow and blow towards the protective film m, while the rubber roller a1 reverses and cooperates. Based on the setting of the air vents s, not only is the contact area during clamping reduced to decrease the adhesive force, but the impact of the airflow also allows the protective film m to be smoothly separated from the contour clamping arm b2. At the same time, the airflow can also help the protective film m and the rubber roller a1 to fall off.

[0041] In summary, after adopting this process, firstly, the polarizing film is laid flat and adsorbed onto the negative pressure adsorption platform. The power module drives the film-tearing module to move to the reference side position. Based on the downward pressure of the rubber roller, the rubber roller is first attached to the reference edge. Then, the rotation and forward synchronous movement of the rubber roller form a curled corner on the reference side of the film. The arc length of the curled corner is L1, and π / 4≤L1≤π / 2. Secondly, while forming the curled corner, the positions of the front and rear contouring clamps are adjusted simultaneously. Based on the alignment of the contouring surface of the front contouring clamp with the roller surface of the rubber roller, the inner wall of the curled corner is supported. At the same time, based on the secondary rotation of the rubber roller and the inner support of the contouring surface, the edge of the film on the reference side is rolled up with an overall arc length of equal length. Then, the film is clamped in the aligned position while maintaining the rolled-up posture of the film edge. The curled corner formed by the secondary rotation of the rubber roller... The arc length is L2, and π / 4 ≤ L1 ≤ π / 2. Finally, maintaining the film roll clamp posture, the power module drives the film tearing module to move towards the reference opposite side to gradually peel off the protective film. Therefore, compared with the prior art, this invention, on the one hand, is based on the adhesive, rotation, and forward movement of the rubber roller, and then the widened inner support and guiding cooperation formed by the contour clamping arm to achieve synchronous and uniform force, avoid edge breakage, and the lifting width is not limited by the roller, and can complete the reliable separation of the entire edge in one go; on the other hand, based on the arc length limitation of the two rolls, it eliminates the adverse defects caused by the edge arc length being too short or too long, and the clamping without changing the edge state avoids edge shearing caused by the roll clamps, resulting in deformation or edge tearing, thereby ensuring that the film tearing trajectory is straight and the film tearing force is uniform and controllable. Ultimately, this achieves efficient and damage-free one-time complete tear-off. Thirdly, based on the alignment of the bottom edge of the rubber roller with the rear edge of the reference, the rubber roller is pressed down for bonding, ensuring the starting position is the same. This avoids deviations in the winding path caused by the initial setup, which could affect the equal arc length winding. It also prevents frequent stretching deformation or breakage due to uneven surface winding force. Furthermore, the rubber roller does not rotate during bonding; it only rotates after bonding is complete, with the rotation direction coordinating with the forward direction to wind the reference upwards around the rear of the rubber roller. This implicitly suggests that although the rubber roller is a rotating structure, its rotation is controlled; when and by how much is designed. Therefore, in this application, to accurately control the winding arc length, it is in a non-rotating state before adhesive bonding. Only after gluing is the rotation driven, that is, a rotation motor is set to control the direction and rotation angle separately; the fourth aspect is based on the inner support of the arc-shaped protrusion, which not only widens the width of the roll-up, but also more effectively realizes that the entire reference edge is rolled up (for example, the roll-up of equal arc length, which is the best state) as the roll-up adheres to the guide. At the same time, before clamping, based on the rotation of the rubber roller, the edge of the film continues to roll up, and under the inner support and guidance of the arc-shaped surface, the rear contour clamping arm synchronously approaches the front contour clamping arm. At the same time, when the rubber roller stops rotating, the rear contour clamping arm and the front contour clamping arm clamp the rolled edge of the film relative to each other. While the rubber roller is rolling for the second time, the rear contour clamping arm moves synchronously to prepare for clamping. When the rubber roller stops rotating, the rear contour clamping arm and the front contour clamping arm clamp relative to each other without changing the roll-up posture.Fifthly, the two windings of 3π / 4≤L1+L2≤π eliminate defects of excessively short or long rolled edges under this winding arc length. This not only facilitates edge clamping and relatively uniform tearing but also eliminates motion interference between the roll clamps. It also reduces pulling or deformation during the tearing process and significantly increases the success rate of a single full tear. Sixthly, the tearing module's movement method involves either gradually peeling off the protective film by moving forward towards the opposite side of the reference or gradually peeling off the protective film by coordinating forward and upward movements towards the opposite side of the reference. In other words, during the tearing process, it can be performed by lifting upwards in conjunction with forward movement, or by tearing horizontally at the same height. The selection is based on the length of the reference side. If the reference length is short, one tearing module can achieve equal arc length curling of the entire edge. Adaptive selection is made as the reference length changes to increase the success rate of tearing. The seventh aspect is that the air knife formed by the ion airflow not only effectively assists in tearing off the protective film, but also eliminates static electricity and dust on the surface of the protective film and polarizer. Generally, the angle formed is 30~45°, and the tearing effect is best at this angle. The eighth aspect is that in the demolding process, based on the assistance of external stress, the reverse rotation of the rubber roller and the free hanging of the protective film cooperate to detach the protective film from the tearing module. In most cases, once the pulling end detaches, the freely hanging protective film can fall freely, completing the film removal and collection. However, the main reason for achieving relative detachment of the pulling end is that the rubber roller has adhesive on the front and back of the protective film, which are also adhered to the contour clamping arm. To completely detach them, both need to work together. One uses a feeding and unwinding method to dewind, while the other uses external stress assistance, combined with the pulling force of its own free-falling gravity, to smoothly detach the protective film from the pulling end and achieve collection. Specifically, the airflow hole design not only effectively reduces the contact area during clamping to reduce adhesive force, but also uses airflow impact to smoothly detach the protective film from the contour clamping arm. At the same time, the airflow scouring also assists in the detachment of the protective film and the rubber roller.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A film-peeling process for a roll-to-roll polarizer protective film, wherein the film-peeling equipment includes a positioning unit and a film-peeling unit, wherein the positioning unit includes a negative pressure adsorption platform, and the film-peeling unit includes a film-peeling module and a power module, characterized in that, Using one side of the polarizer as the starting point for film tearing, the film tearing module includes a film tearing clamp that raises the edge of the reference by an equal arc length. The film tearing clamp includes a raised corner portion and a clamping portion. The raised corner portion includes a self-rotating rubber roller, a lifting device that drives the rubber roller to move up and down, and a self-rotation power unit. The clamping portion includes a front conforming clamp arm and a rear conforming clamp arm based on the shape layout of the rubber roller, and a clamping arm power unit. The module also includes the following steps: S1. Upturned corner The polarizing film is laid flat and adsorbed on the negative pressure adsorption platform. The power module drives the film tearing module to move to the position of the reference side. Based on the downward pressure of the rubber roller, the rubber roller is first attached to the reference edge. Then, the rotation and forward synchronous movement of the rubber roller form the film on the reference side into a curled corner. The arc length of the curled corner is L1, and π / 4≤L1≤π / 2. S2. Clamping While forming the warp angle, the positions of the front and rear contouring clamps are adjusted simultaneously. The inner wall of the warp angle is supported by the contouring surface of the front contouring clamp and the roller surface of the rubber roller. At the same time, the inner wall of the film edge on the reference side is rolled up with an equal arc length based on the secondary rotation of the rubber roller and the inner support of the contouring surface. Then, the film edge is aligned and clamped while maintaining the rolled-up posture. The arc length of the warp angle rolled up by the secondary rotation of the rubber roller is L2, and π / 4≤L2≤π / 2. S3. Uncover Maintaining the film roll clamp posture, the power module drives the film tearing module to move towards the reference opposite side to gradually peel off the protective film.

2. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 1, characterized in that, In step S1, after the bottom edge of the rubber roller is aligned with the reference rear edge, the rubber roller is pressed down to bond the product.

3. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 2, characterized in that, During the bonding process, the rubber roller does not rotate. After bonding is completed, it rotates, and the rotation direction cooperates with the forward direction to roll the reference upward around the back of the rubber roller.

4. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 1, characterized in that, The front contour clamping arm forms an arc-shaped protrusion that arches backward from the lower end, and the lower end of the rear contour clamping arm forms an arc-shaped groove that matches the arc-shaped protrusion. Before the second rotation of the rubber roller in step S2, the arc-shaped protrusion supports the inner wall of the curved corner from the arc surface.

5. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 4, characterized in that, Before clamping, based on the rotation of the rubber roller, the edge of the film continues to roll up, and under the support and guidance of the arc surface, the rear conforming clamp arm synchronously approaches the front conforming clamp arm. At the same time, when the rubber roller stops rotating, the rear conforming clamp arm and the front conforming clamp arm clamp the rolled edge of the film relative to each other.

6. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 5, characterized in that, The arc-shaped protrusion is semi-cylindrical, and the cross-sectional area of ​​the arc-shaped protrusion is equal to half the cross-sectional area of ​​the rubber roller, π / 2≤L1+L2≤π.

7. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 6, characterized in that, 3π / 4≤L1+L2≤π.

8. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 1, characterized in that, In step S3, the film-peeling module moves by either moving forward towards the opposite side of the reference to gradually peel off the protective film, or by moving forward and upward in coordination to gradually peel off the protective film towards the opposite side of the reference.

9. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 1, characterized in that, There is at least one film-tearing module, and one or more corner sections are selected based on the length of the reference side. At the same time, the clamping part based on the alignment assists the roll clamp to roll up the reference side with an overall arc length of equal length.

10. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 9, characterized in that, There are multiple film-tear modules, which are evenly spaced based on the center of the reference side.

11. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 10, characterized in that, Among the multiple film-tearing modules, those located at both ends are defined as corner film-tearing modules, and the remaining film-tearing modules are defined as side film-tearing modules. Each corner film-tearing module rotates around the vertical direction to adjust the angle to switch between corner film-tearing and side film-tearing. The film-tearing modules based on the side and / or corners cooperate to roll up a corner, roll up the entire side, or roll up the entire side and two corners.

12. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 11, characterized in that, In step S1, the corner tearing module rotates to switch to the side tearing module, and multiple side tearing modules simultaneously roll up the entire reference side with equal arc length.

13. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 1, characterized in that, The film-peeling device also includes an ion blowing unit, which includes an ion chamber arranged along a reference length direction, multiple nozzles arranged side by side at intervals along the length direction of the ion chamber, and an ion supply component, wherein the ion gas flow ejected from the multiple nozzles is blown between the peeled protective film and the polarizer.

14. The film-peeling process of the roll-to-roll polarizer protective film according to any one of claims 1 to 13, characterized in that, The film-peeling process also includes the step S4. Film removal, which removes the protective film from the tearing end formed by the rubber roller and the clamping part.

15. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 14, characterized in that, During the film removal process, external stress assists, while the reverse rotation of the rubber roller and the free drooping of the protective film work together to detach the protective film from the film-tearing module.

16. The film-peeling process of the roll-and-clamp cooperative polarizer protective film according to claim 15, characterized in that, An airflow hole is provided in the clamping part of the rear conforming clamp arm. When clamping is performed in step S2, the protective film closes the airflow hole to adhere to the clamping surface. When demolding is performed in step S4, the airflow hole allows air to pass through and blows towards the protective film, and the rubber roller reverses to cooperate.

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