Process for lifting off a protective film of a screen glass based on the cooperation of the corner lifting and the rolling pressure

Abstract

The present application discloses a kind of based on lifting angle and rolling cooperation formula screen glass protective film of display film stripping process, including steps: S1, lifting angle;S2, tear off;S3, film collection.The cooperation of film tearing clamp and roller in the present application, keep rolling and tearing position alignment gradually stripping, while based on the angle between the junction section and screen glass gradually increases based on the junction section under the stress of adhering section, not only greatly improve the success rate of forming inversion tearing angle, but also reduce the probability of protective film corner tearing or protective film tape separation;On the other hand, based on the relative motion of glass and film tearing clamp to improve the complete tearing rate of protective film, not only reduce the risk of protective film tearing, but also more energy-saving, more quickly diagonal tearing, while based on the pulling formed by film collection clamp and film tearing clamp, combined with the formed airflow blowing cooperation, not only improve the integrity of film collection, but also solve the problem of film tearing tape adhering film tearing clamp, and then improve the continuity of protective film stripping.

Description

Technical Field

[0001] This invention belongs to the field of display technology, specifically relating to a protective film peeling process for display glass based on a combination of corner lifting and rolling. Background Technology

[0002] A display screen typically consists of multiple functional layers and a liquid crystal display panel. The liquid crystal display panel is based on glass as a carrier for assembling other components. That is, the protective film on the glass needs to be removed before assembly.

[0003] Currently, the specific steps for removing the glass protective film are as follows:

[0004] S1, Lifting Corner

[0005] Adhesive tape is used to adhere to a corner of the glass protective film. Then, the adhesive tape is held by the adhesive tape and moved relative to the glass so that the adhesive tape causes the protective film to lift up from the corner to form a raised corner.

[0006] S2, Tear off

[0007] Then, based on the tearing claws moving relatively away from the glass and diagonally towards the corner, the protective film is gradually torn off the glass surface;

[0008] S3, Film closing

[0009] The protective film is held by a film-collecting gripper, and the film-tearing gripper works in conjunction with the film-collecting gripper to release the film-tearing tape from the film-tearing gripper. The protective film is then released into the film-collecting frame as the film-collecting gripper releases.

[0010] However, the following technical defects exist in the process of peeling off the aforementioned protective film:

[0011] 1) During the initial corner-lifting process, the force is concentrated on the film-tearing tape. When the interfacial adhesion force between the tape and the protective film is less than the peeling force required for corner lifting, it is easy for the tape and the protective film to peel off and fail, while the non-protective film separates from the glass substrate. Therefore, the result is not only that an effective corner cannot be formed, but also that the tape falls off, resulting in a low success rate of corner lifting in the initial stage of the process.

[0012] 2) During the tearing process, the glass is in a static state, and the tearing is a simple stretching process in one point and one direction. The tearing angle and force cannot be adjusted, which makes the direction and magnitude of the tearing force uncontrollable. This easily leads to stress concentration inside the protective film. When the stress exceeds the cohesive strength of the protective film, tearing occurs. Or when the direction of the force deviates from the optimal peeling angle, the effective peeling force is insufficient, causing the tearing to be interrupted. At the same time, once uneven adhesion or wrinkles occur, the static glass cannot be adjusted. All corrections rely solely on the grippers, which greatly increases the difficulty and risk of interruption in achieving smooth and continuous tearing.

[0013] 3) As the film-peeling tape deforms during the film-peeling process, it adheres more closely to the film-peeling jaws. If the cooperating force formed by the film-retracting jaws is insufficient, the film-peeling tape will detach from the film-peeling jaws, causing the film-peeling tape to detach from the protective film and adhere to the film-peeling jaws. The film-peeling jaws with the film-peeling tape adhering to them directly affect the continuity of the protective film peeling off the next piece of glass. Summary of the Invention

[0014] The purpose of this invention is to overcome the shortcomings of the prior art and provide an improved protective film peeling process for display glass based on corner lifting and rolling collaboration.

[0015] To achieve the above objectives, the present invention adopts the following solution:

[0016] A protective film peeling process for display glass based on corner lifting and roll forming collaboration includes the following steps:

[0017] S1, Lifting Corner

[0018] First, the screen glass is horizontally positioned with the protective film facing downwards. A portion of the film-removing tape is held by the film-removing claws, while the remaining portion of the film-removing tape is exposed and adhered to a corner of the protective film with the adhesive side facing upwards. The film-removing tape is divided into an adhesion section, a connecting section, and a clamping section. Second, based on the film-removing claws turning inwards and moving inwards towards the bottom of the glass, the connecting section turning inwards gradually increasing the angle between the connecting section and the screen glass under the stress of the adhesion section, and the rollers rolling and resisting the adhesion section in sync with the film-removing claws, the film is gradually peeled off while maintaining the alignment between the rolling position and the protective film tearing position, until the clamping position of the film-removing tape is inside the protective film tearing position, and the corner of the protective film turns inwards to form a tearing angle.

[0019] S2, Tear off

[0020] Based on the cooperative movement of the display glass and the film-tearing claw, the film-tearing claw moves from the corner to the opposite corner while maintaining a constant tear angle or gradually decreasing tear angle to tear the display glass; the display glass moves along its own length and / or width.

[0021] S3, Film closing

[0022] The film-tearing tape is detached from the film-tearing claws by the film-receiving claws and the film-tearing claws, and the protective film is unloaded into the material frame below by the airflow generated by the opening of the film-tearing claws.

[0023] Preferably, in step S1, when the angle between the connecting section and the display glass is greater than or equal to 30°, the adhesive section causes the corner of the protective film to begin to peel off. Starting the peeling at this time not only facilitates the inward peeling of the protective film corner but also avoids relative peeling between the adhesive section and the protective film.

[0024] According to a specific embodiment and preferred aspect of the present invention, in step S1, the roller is set to rotate freely and moves synchronously and rolls as the tearing position changes. This not only reduces the rate of detachment or damage of the film-tearing tape during the tearing angle formation process, but also avoids the accidental breakage rate of the protective film corner (once a corner is damaged, it will be difficult to start tearing from that corner).

[0025] Preferably, after the tear angle is formed, the roller moves down to detach from the display glass before step S2 is performed. Once the tear angle is formed, roller assistance is no longer needed; at the corresponding tear angle, the display glass and the tear film gripper can directly tear apart through relative movement.

[0026] In some implementations, the rollers maintain equal rolling pressure on the display glass during dynamic operation. This avoids uneven rolling pressure that could affect the damage rate of the peel-off tape and protective film corners, while also increasing the success rate of forming a peel-off corner.

[0027] Preferably, the width of the roller is greater than or equal to the width of the adhesive section, and it covers and rolls over the adhesive section. This further improves the adhesion strength of the adhesive section during the peeling process, reducing the probability of the adhesive tape falling off or being damaged.

[0028] According to another specific embodiment and preferred aspect of the present invention, in step S1, the film-peeling tape is in the form of a long strip of equal width, and is attached to the corner of the protective film from the adhesive section along the diagonal direction of the display glass. Using a diagonal peeling method not only results in a high success rate of peeling but also requires less effort.

[0029] Preferably, the lengths of the adhesion section, clamping section, and connecting section are L1, L2, and L3, respectively, where L1 > L2 > L3. This design with varying lengths satisfies the needs for clamping, adjustable tearing angle, and balanced tearing force, thereby significantly increasing the success rate of tearing.

[0030] Furthermore, the surface of the clamping section is non-adhesive. This reduces the probability of the film-tearing tape adhering to the film-tearing claws, thus facilitating the detachment of the film-tearing tape.

[0031] Furthermore, the surface of the connecting section is non-adhesive. This prevents the film-tearing tape from sticking to the film-tearing claws when changing the angle of the film-tearing tape, thus reducing the difficulty of film collection.

[0032] According to another specific embodiment and preferred aspect of the present invention, in step S3, the film-receiving gripper moves to clamp the middle of the protective film, and after the film-tearing gripper releases the clamping section, a pulling and airflow blowing action is combined to detach the film-tearing tape from the film-tearing gripper. Based on the resulting pulling action combined with airflow blowing, the success rate of the clamping section detaching from the film-tearing gripper is improved.

[0033] Preferably, an air duct is formed through multiple tooth grooves on the tearing gripper, and an air nozzle is provided inside the tearing gripper. Based on the air supply to the air nozzle, the airflow blown from the air duct enters between the tearing gripper and the clamping section to assist in blowing away the film. The air duct is used for airflow purging, thereby cooperating with the clamping section to disengage from the tearing gripper.

[0034] Furthermore, the airflow entering the duct flows along the duct itself, while some is diverted to the corresponding claw grooves to create coordinated airflow that blows away the clamping section. This airflow, amplified from different directions, increases the success rate of detachment from the clamping section.

[0035] In some specific embodiments, there are multiple air ducts, which are spaced apart along the length of the claw grooves, with the air ducts and claw grooves arranged perpendicularly. This arrangement not only facilitates molding but also produces airflow with good purging efficiency and effect.

[0036] Furthermore, in step S1, during the gradual tearing off of the protective film at the corner, airflow from the air duct along the connecting section towards the display glass, and the deflection formed by the display glass, partially directs the airflow between the protective film and the display glass to collaboratively form the tear-off corner. Further airflow purging is employed to reduce the difficulty of forming the tear-off corner and increase the success rate of its formation.

[0037] Specifically, after the tear angle is formed, the air nozzle stops blowing air before proceeding to step S2 for tearing. This is to prevent airflow during the tearing process from causing the protective film to float and affecting the success rate of tearing.

[0038] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0039] In existing protective film removal processes, firstly, during the initial corner-lifting process, the force is concentrated on the adhesive tape. When the interfacial adhesion between the tape and the protective film is less than the peeling force required for corner lifting, the tape easily peels off from the protective film, rather than the protective film separating from the glass substrate. Therefore, not only does this fail to form an effective corner, but it also directly causes the tape to detach, resulting in a low success rate of corner lifting in the initial stage. Secondly, during the tearing step, the glass is in a static state, and tearing is a simple, single-point, unidirectional stretching process. The tearing angle and force cannot be adjusted, leading to uncontrollable tearing force direction and magnitude, which easily results in… Stress concentration forms within the protective film, and when this stress exceeds the film's cohesive strength, tearing occurs. Alternatively, if the force direction deviates from the optimal peel angle, insufficient effective peeling force leads to interrupted tearing. Furthermore, if uneven adhesion or wrinkles occur, the stationary glass cannot adjust accordingly, and all corrections rely solely on the grippers, significantly increasing the difficulty and risk of interruption in achieving smooth and continuous tearing. Finally, because the tear-off tape deforms during the tearing process, adhering more closely to the tear-off grippers, insufficient cooperating force from the retracting grippers can cause the tape to detach from the grippers, resulting in the tape separating from the protective film and adhering to the surrounding surface. The existing protective film removal process for display glass, based on a corner-flipping and rolling collaborative design, cleverly solves the shortcomings and defects of the prior art. Firstly, the display glass is horizontally positioned with the film to be removed facing downwards. The film removal claws hold a portion of the film removal tape, while the remaining tape is exposed and adhered to a corner of the protective film with the adhesive side facing upwards. The film removal tape is divided into an adhesion section, a connecting section, and a clamping section. Then, based on the inward flipping and inward movement of the film removal claws towards the bottom of the glass... The connecting section gradually increases the angle between the connecting section and the display glass under the stress of the adhesive section. Simultaneously, a roller that moves upwards in sync with the film-peeling claw rolls against the adhesive section, maintaining the alignment of the rolling position and the protective film tearing position for gradual peeling until the clamping position of the film-peeling tape is inside the protective film tearing position, and the corner of the protective film flips inward to form a tearing angle. Next, based on the cooperative movement of the display glass and the film-peeling claw, the film-peeling claw moves from the corner to the opposite corner, maintaining a constant tearing angle or gradually decreasing the tearing angle as it peels off the display glass. The display glass moves along its own length and / or width.Finally, through the combined action of the tearing action generated by the film-collecting gripper and the tearing gripper, and the airflow generated inside the open tearing gripper, the film-tearing tape is detached from the tearing gripper. The protective film is then transferred and unloaded by the film-collecting gripper to the lower material frame. Therefore, compared to existing technologies, this invention, on the one hand, utilizes the cooperation of the tearing gripper and the roller to maintain the alignment of the rolling position and the protective film tearing position for gradual peeling; on the other hand, based on the inward rotation of the connecting section under no force on the adhesive section, the angle between the connecting section and the display glass is gradually increased, significantly improving… This increases the success rate of forming an inward-turning tear angle and reduces the probability of the tearing tape detaching from the protective film or causing corner tearing of the protective film. On the other hand, the relative movement between the glass and the tearing claws improves the complete tearing rate of the protective film, not only reducing the risk of tearing but also enabling more effortless and faster diagonal tearing. Furthermore, the pulling action created by the film-collecting claws and the tearing claws, combined with the resulting airflow, not only improves the integrity of the collected film but also solves the problem of the tearing tape adhering to the tearing claws, thereby improving the continuity of protective film removal. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the protective film peeling process equipment for screen display glass based on the corner lifting and rolling collaborative method in this embodiment.

[0041] Figure 2 for Figure 1 A structural diagram from another perspective;

[0042] Figure 3 for Figure 1 Schematic diagram of the structure of the tear-off film unit;

[0043] Figure 4 for Figure 3 A schematic diagram of the initial state of the film tear-off process;

[0044] Figure 5 for Figure 3 A schematic diagram of the middle section of the tear-off film;

[0045] Figure 6 for Figure 3 A schematic diagram showing the state in which a tear angle is formed;

[0046] Wherein: 1. Flip-up unit; 10. Base; 100. Connecting part; 101. Flipping part; 11. Flip-up mechanism; 110. Film tearing gripper; c. Grip tooth groove; f. Air duct; 111. Roller; m. Wheel seat; s. Lifting cylinder; 112. Air nozzle;

[0047] 2. Tear-off unit; 20. Power unit; 21. Shifter; 210. Shifter seat; 211. Linear power unit;

[0048] 3. Film take-up unit; 30. Film take-up gripper; 31. Film take-up motor;

[0049] B, Display glass; M, Protective film; Q, Film-removing tape; q1, Adhesion section; q2, Connecting section; q3, Clamping section; T, Material table. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figures 1 to 6 As shown, the protective film peeling process for the display glass based on the corner lifting and rolling collaborative method in this embodiment uses a peeling device including a corner lifting unit 1, a tearing unit 2, and a film collection unit 3. The corner lifting unit 1 includes a base 10 and a corner lifting mechanism 11 mounted on the base 10. The corner lifting mechanism 11 includes a film tearing gripper 110 and a roller 111 respectively mounted on the base 10. The film tearing gripper 110 clamps the film tearing tape based on the clamping part formed by the claw tooth groove. The roller 111 is used for rolling abutment to increase the adhesion between the film tearing tape and the protective film. The tearing unit 2 includes a power unit 20 that drives the base 10 to move in the XYZ three-axis coordinate system and a shifter 21 that drives the display glass B to move relative to it. The film collection unit 3 includes a film collection gripper 30 and a film collection power unit 31. Driven by the film collection power unit 31, the film collection gripper 30 moves in the XYZ three-axis coordinate system to collect the film.

[0056] Specifically, the protective film removal process includes the following steps:

[0057] S1, Lifting Corner

[0058] First, the display glass B is horizontally positioned with the film to be peeled facing down (the display glass B is adsorbed from the material table T by negative pressure adsorption). Part of the film peeling tape Q is held by the film peeling claw 110, and the remaining film peeling tape Q is partially exposed and attached to a corner of the protective film with the adhesive side facing up. The film peeling tape Q is divided into an adhesion section q1, a connecting section q2 and a clamping section q3.

[0059] Secondly, based on the inward turning and moving of the tearing gripper 110 towards the bottom of the glass, the inward turning of the connecting section q2 under the force of the adhesive section q1 gradually increasing the angle between the connecting section q2 and the display glass B, and the roller 111 which moves synchronously with the tearing gripper 110 and can move upward on its own, the roller 111 rolls against the adhesive section q1 to cooperate, maintaining the alignment of the rolling position and the protective film tearing position, and gradually peeling off until the clamping position of the tearing tape is located inside the protective film tearing position, and the corner of the protective film turns inward to form a tearing angle;

[0060] S2, Tear off

[0061] Based on the cooperative movement of the display glass B and the tearing gripper 110, the tearing gripper 110 moves from the corner to the opposite corner while maintaining a constant tearing angle or gradually decreasing tearing angle to tear off the display glass B; the display glass B moves along its own length and / or width.

[0062] S3, Film closing

[0063] Based on the tearing action generated by the film-receiving gripper 30 and the tearing gripper 110, and the airflow generated inside the tearing gripper 110, the tearing tape is detached from the tearing gripper 110, and the protective film M is unloaded into the material frame below by the film-receiving gripper 30 for transfer and unloading.

[0064] Specifically, the film-removing tape Q is a long strip of equal width, attached to the corner of the protective film along the diagonal direction of the display glass B, starting from the adhesive section. This diagonal tearing method not only ensures a high success rate but also reduces effort. Furthermore, the lengths of the adhesive section q1, clamping section q3, and connecting section q2 of the film-removing tape Q are L1, L2, and L3, respectively, where L1 > L2 > L3. This design with varying lengths satisfies the needs for clamping, adjustable tearing angle, and balanced tearing force, thereby significantly increasing the success rate of tearing. In this example, the surface of the clamping section q3 is non-adhesive. This reduces the probability of the film-removing tape adhering to the tearing claws, thus facilitating the detachment of the film-removing tape Q. Similarly, the surface of the connecting section q2 is non-adhesive. This avoids the phenomenon of the film-removing tape adhering to the tearing claws during changes in the tearing angle, thus reducing the difficulty of film collection.

[0065] The width of roller 111 is greater than the width of adhesive segment q1, and it covers and rolls over adhesive segment q1. This further improves the adhesion strength of adhesive segment q1 during the tear-off corner process, reducing the probability of the film-removing tape Q falling off or being damaged. In this example, roller 111 is set to rotate freely and moves synchronously with the tear-off position. This not only reduces the rate of film-removing tape detachment or damage during the tear-off corner formation process, but also avoids the accidental breakage rate of the protective film corner (once a corner is damaged, it will be difficult to start tearing from that corner). At the same time, roller 111 maintains equal rolling pressure on the display glass B dynamically. This avoids uneven rolling pressure affecting the damage rate of the film-removing tape and protective film corners, and also increases the success rate of forming the tear-off corner. In addition, after the tear-off corner is formed, roller 111 moves down to detach from the display glass B before the tear-off in step S2 is performed. Once the tear angle is formed, no roller assistance is needed. At the corresponding tear angle, the screen glass and the tear film grippers can be directly torn apart by relative movement.

[0066] In this example, a wheel seat m is provided on the base 10, and the lifting cylinder s is used for vertical adjustment. The base 10 is a connecting part 100 and a flipping part 101. The flipping part 101 flips around the horizontal direction (or the X-axis) to form an inward flip. In short, at the same time as the flipping part 101 forms an inward flip, the tearing gripper 110 and the roller 111 flip synchronously. At this time, the roller 111 is pushed up by the lifting cylinder s to form a synchronous inward movement, so as to realize that the contact position and the tearing position formed by the roller 111 are simultaneously lifted and torn apart.

[0067] In some specific embodiments, when the angle between the connecting segment q2 and the display glass B is greater than or equal to 30°, the adhesive segment q1 causes the corner of the protective film to begin to peel off. Starting the peeling at this time not only facilitates the inward peeling of the protective film corner but also avoids relative peeling between the adhesive segment q1 and the protective film.

[0068] In some specific embodiments, the power unit 20 adopts a conventional linear power unit, and the three-dimensional movement is achieved by direct linear motion; the shifter 21 drives the display glass B to move in the length or width direction. Here, the linear motion is achieved by a linear power unit commonly used in the art. The linear power unit used is a lead screw nut, telescopic cylinder pusher, etc. In this example, the shifter 21 includes a shift seat 210 and a linear power unit 211 that drives the shift seat 210 to move along the X and Z axes. The display glass B is adsorbed on the shift seat 210 and is horizontally set with the film to be peeled facing downwards.

[0069] In some specific embodiments, the film-collecting gripper 30 in step S3 moves to clamp the middle of the protective film, and after the film-tearing gripper 110 releases the clamping section, a combination of pulling and airflow blowing is used to detach the film-tearing tape from the film-tearing gripper 110. Based on the resulting pulling action combined with airflow blowing, the success rate of the clamping section detaching from the film-tearing gripper is improved.

[0070] In this example, an air duct f is formed through multiple tooth grooves c of the tearing gripper 110, and an air nozzle 112 is provided inside the tearing gripper 110. Based on the air supply to the air nozzle 112, the airflow blown from the air duct f enters between the tearing gripper 110 and the clamping section q3 to assist in blowing away the gripper. The air duct is used for airflow purging, thereby assisting the clamping section to detach from the tearing gripper. In short, the airflow entering the air duct f flows along the air duct f and is diverted to the corresponding tooth groove c to form airflow cooperation to blow away the clamping section q3. Under the agitation of airflow in different directions, the success rate of clamping section detachment is improved.

[0071] In some specific embodiments, there are multiple air ducts f, which are spaced apart along the length of the claw groove c, with the air ducts f and the claw groove c arranged perpendicularly. This arrangement not only facilitates molding but also produces airflow with good purging efficiency and effect.

[0072] Furthermore, during the gradual peeling of the protective film at the corner, airflow from the air duct f along the connecting section towards the display glass B, and the deflection formed by the display glass, partially directs the airflow between the protective film and the display glass B to collaboratively form the peeling angle. Further airflow purging is employed to reduce the difficulty of forming the peeling angle and increase its success rate. Simultaneously, after the peeling angle is formed, the air nozzle 112 stops blowing before proceeding to step S2. This prevents the protective film from floating due to airflow during the peeling process, thus affecting the success rate of peeling.

[0073] In summary, after adopting this peeling process, firstly, the display glass is horizontally positioned with the film to be peeled facing downwards. A portion of the peeling tape is held by peeling claws, while the remaining peeling tape is exposed and adhered to a corner of the protective film with the adhesive side facing upwards. The peeling tape is divided into an adhesion section, a connecting section, and a clamping section. Then, based on the peeling claws flipping and moving inwards towards the glass, the connecting section gradually increasing the angle between the connecting section and the display glass due to the adhesion section being unloaded, and the rollers moving synchronously with the peeling claws and capable of upward movement against the adhesion section, the rolling position and protective film are maintained. The protective film is gradually peeled off, aligned with the tear-off position, until the gripping position of the film-tearing tape is inside the tear-off position, and the corner of the protective film is turned inward to form a tear-off angle; secondly, based on the cooperative movement of the display glass and the film-tearing claws, the film-tearing claws move from the corner to the opposite corner, maintaining a constant tear-off angle or gradually decreasing the tear-off angle while tearing off the display glass; the display glass moves along its own length and / or width; finally, based on the tear-off pulling generated by the film-retracting claws and the film-tearing claws, and the airflow generated by the opening of the film-tearing claws and the internal blowing, the film-tearing tape is released from the film-tearing claws. The protective film is transferred and unloaded by the film-receiving gripper to the material frame below. Therefore, compared with the prior art, the present invention, on the one hand, uses the cooperation of the film-tearing gripper and the roller to gradually peel off the protective film while maintaining the alignment between the rolling position and the tearing position. At the same time, based on the fact that the connecting section gradually increases the angle between the connecting section and the display glass by turning inward under no force on the adhesive section, it not only greatly improves the success rate of forming the inward tearing angle, but also reduces the probability of the film-tearing tape detaching from the protective film or causing the protective film to tear at the corner. On the other hand, the relative movement between the glass and the film-tearing gripper improves the complete tearing rate of the protective film. This not only reduces the risk of tearing the protective film, but also makes diagonal tearing easier and faster. Furthermore, the pulling action created by the film-collecting and tearing claws, combined with the resulting airflow, not only improves the integrity of the collected film but also solves the problem of adhesive tape adhering to the tearing claws, thus enhancing the continuity of protective film removal. Thirdly, when the angle between the connecting section and the display glass is greater than or equal to 30°, the adhesion section initiates tearing at the corner of the protective film. This not only facilitates the inward tearing of the protective film corners but also avoids relative tearing between the adhesion section and the protective film.Fourthly, the rollers are designed to rotate freely and move synchronously with the tearing position, reducing the rate of detachment or damage to the adhesive tape during the tear-off corner formation process. This also avoids accidental breakage at the corners of the protective film (once a corner is damaged, it becomes very difficult to tear from that corner). Simultaneously, the rollers maintain equal rolling pressure on the display glass during dynamic operation, preventing uneven rolling pressure from affecting the damage rate of the adhesive tape and protective film corners, and increasing the success rate of tear-off corner formation. Furthermore, the roller width is greater than or equal to the width of the adhesive section and covers and rolls over it, further improving the adhesion strength of the adhesive section during the tear-off corner process. This design reduces the probability of the adhesive tape falling off or getting damaged. After a tear angle is formed, the roller moves down to detach from the display glass before the tearing process begins. In other words, once a tear angle is formed, roller assistance is no longer needed; the display glass and the tearing grippers can directly tear off the film through relative movement at the corresponding tear angle. Fifthly, the adhesive tape is a long strip of equal width, and it is attached to the corner of the protective film from the adhesion section along the diagonal direction of the display glass. This diagonal tearing method not only has a high success rate but also requires less effort. The adhesive tape is divided into an adhesion section, a clamping section, and a connecting section, with lengths L1, L2, and L3 respectively, where L1 > L2 > L3. L3, designed with varying lengths, meets the needs of clamping, tearing angle adjustment, and balanced tearing force, thus significantly increasing the success rate of tearing. Furthermore, the clamping section has a non-adhesive surface, reducing the probability of the tearing tape adhering to the tearing claws, facilitating tape detachment. Simultaneously, the connecting section also has a non-adhesive surface, preventing tape adhesion to the tearing claws during tape angle adjustments, thereby reducing film collection difficulty. Sixthly, the combined pulling action and airflow further enhance the success rate of the clamping section detaching from the tearing claws. This is especially beneficial during the gradual tearing of the protective film at corners. Airflow travels from the duct along the connecting section towards the display glass, where it is deflected by the glass to create a tear angle between the protective film and the display glass. Further airflow purging reduces the difficulty of forming this tear angle, increasing its success rate. After the tear angle is formed, the nozzle stops blowing air before tearing, preventing the protective film from floating and affecting the success rate. Additionally, some airflow entering the duct flows along the duct, while some is diverted to the corresponding claw grooves to create airflow cooperation that blows away the clamping section. This airflow agitation in different directions further improves the success rate of detachment from the clamping section.

[0074] 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 protective film peeling process for display glass based on corner lifting and rolling collaboration, comprising the following steps: S1, corner lifting; S2, tearing off; S3, collecting the film, characterized in that, The peeling equipment includes a corner-lifting unit, a tearing unit, and a film-collecting unit. The corner-lifting unit includes a base and a corner-lifting mechanism mounted on the base. The corner-lifting mechanism includes a film-tearing gripper and a roller mounted on the base. A wheel seat is provided on the base, and the roller is adjusted up and down by a lifting cylinder. The base includes a connecting part and a flipping part. The flipping part flips inward around the horizontal direction. The wheel seat and the film-tearing gripper are located on the flipping part. An air duct is formed through multiple tooth grooves on the claw of the film-tearing gripper. An air nozzle is provided inside the film-tearing gripper. Based on the air supply to the air nozzle, the airflow blown from the air duct enters between the film-tearing gripper and the clamping section to assist in the tearing. The tearing unit includes a power unit that drives the base to move in the XYZ three-axis coordinate system and a shifter that drives the relative movement of the display glass. The film-collecting unit includes a film-collecting gripper and a film-collecting power unit. Driven by the film-collecting power unit, the film-collecting gripper moves in the XYZ three-axis coordinate system to collect the film. In step S1, firstly, the display glass is horizontally positioned with the film to be peeled facing downwards. A portion of the film-peeling tape is held by the film-peeling claws, while the remaining portion of the film-peeling tape is exposed and adhered to a corner of the protective film with the adhesive side facing upwards. The film-peeling tape is divided into an adhesion section, a connecting section, and a clamping section. Secondly, based on the film-peeling claws turning inwards and moving inwards towards the bottom of the glass, the connecting section turning inwards gradually increasing the angle between the connecting section and the display glass under the stress of the adhesion section, and the rollers rolling and resisting the adhesion section in sync with the film-peeling claws, the film is gradually peeled off while maintaining the alignment between the rolling position and the protective film peeling position, until the clamping position of the film-peeling tape is inside the protective film peeling position, and the corner of the protective film turns inwards to form a peeling angle. In step S2, based on the cooperative movement of the display glass and the tearing gripper, the tearing gripper moves from the corner to the opposite corner while maintaining a constant tearing angle or gradually decreasing tearing angle to tear off the display glass; the display glass moves along its own length and / or width. In step S3, the film-tearing tape is detached from the film-tearing grippers by the film-receiving grippers and the film-tearing grippers, and the protective film is unloaded into the material frame below by the film-receiving grippers and the airflow generated by the opening of the film-tearing grippers.

2. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 1, characterized in that, In step S1, when the angle between the connecting section and the display glass is greater than or equal to 30°, the adhesive section causes the corner of the protective film to begin to peel off.

3. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 1, characterized in that, In step S1, the roller is set to rotate freely and shifts synchronously with the change of tear position.

4. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 3, characterized in that, After the tearing angle is formed, the roller moves down to detach from the display glass before step S2 is performed.

5. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 3, characterized in that, The roller maintains equal rolling pressure on the display glass during dynamic operation.

6. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 5, characterized in that, The width of the roller is greater than or equal to the width of the adhesion section, and it covers and rolls over the adhesion section.

7. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 1, characterized in that, In step S1, the film-peeling tape is in the form of a long strip of equal width, and is attached to the corner of the protective film from the adhesive section along the diagonal direction of the display glass.

8. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 7, characterized in that, The lengths of the adhesion segment, clamping segment, and connecting segment are L1, L2, and L3, respectively, where L1 > L2 > L3.

9. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 8, characterized in that, The surface of the clamping section is a non-adhesive surface.

10. The protective film peeling process for display glass based on corner lifting and rolling cooperation as described in claim 8, characterized in that, The surface of the connecting section is a non-adhesive surface.

11. The protective film peeling process for display glass based on corner lifting and rolling cooperation according to claim 1, characterized in that, In step S3, the film receiving jaws move to clamp the middle of the protective film, and after the film tearing jaws release the clamping section, they pull and blow air to remove the film tearing tape from the film tearing jaws.

12. The protective film peeling process for display glass based on corner lifting and rolling cooperation according to claim 1, characterized in that, The airflow entering the duct flows along the duct and is split to the corresponding claw groove to form airflow cooperation to blow away the clamping section.

13. The protective film peeling process for display glass based on corner lifting and rolling cooperation according to claim 12, characterized in that, There are multiple air ducts, which are distributed at intervals along the length of the claw grooves, with the air ducts and claw grooves arranged vertically.

14. The protective film peeling process for display glass based on corner lifting and rolling cooperation according to claim 13, characterized in that, In step S1, during the gradual tearing of the protective film at the corner, airflow is blown from the air duct along the connecting section to the display glass, and the deflection formed by the display glass blows part of the airflow to the area between the protective film and the display glass to cooperate in forming the tearing angle.

15. The protective film peeling process for display glass based on corner lifting and rolling cooperation according to claim 14, characterized in that, After the tear angle is formed, the nozzle stops blowing air and then the tearing process in step S2 is performed.

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