Film uncovering unit and film uncovering process of screen protection film

Abstract

The invention discloses a film uncovering unit and a film uncovering process for a screen protection film, and the film uncovering unit comprises an uncovering seat, a negative pressure adsorption head, an angle adjusting part and an uncovering power part, wherein the component force formed by the adsorption force provided by the negative pressure adsorption head to the screen protection film and the stripping force provided by the release material layer moving forwards to the screen protection film in the vertical direction is in a balanced state, so that the screen protection film is stripped from the release material layer in dynamic balance. According to the invention, on one hand, dynamic balance formed by a plurality of stresses of the screen protection film is combined, and the screen protection film is gradually uncovered during movement, so that the offset of the screen protection film is avoided, the flatness of the uncovered screen protection film and the accuracy of the state are improved, and a high-quality operation basis is provided for later attachment; on the other hand, based on decomposition of force formed by the inclined film uncovering station, uncovering of the screen protection film in dynamic balance is better facilitated, meanwhile, tilting of the end is avoided, the deformation rate of the screen protection film or the release material layer is reduced, and then the uncovering difficulty is reduced.

Description

[0001] This application is a divisional application of an application with an application date of November 14, 2024, an application number of 2024116229550, and a title of a film peeling structure for a screen protection film. Technical Field

[0002] The present invention belongs to the technical field of film laminating, and specifically relates to a film peeling unit for a screen protection film, and also relates to a film peeling process for a screen protection film. Background Art

[0003] Currently, in the production of electronic displays, film laminating is an essential process, and this film laminating process includes film peeling and film sticking. Among them, film peeling refers to peeling the screen protection film from the release material layer, and film sticking refers to sticking the peeled screen protection film onto the display screen.

[0004] However, the screen protection film is relatively spaced and adhered to the release material layer, and is in a rolled shape together with the release material layer. When film peeling is required, first unroll and then peel the film. However, there are the following technical difficulties in the actual film peeling process:

[0005] 1) If the operation is carried out by first tilting the end and then gradually peeling off, due to the existence of the tilted part, the probability that the screen protection film is peeled off the display screen due to external force is relatively high;

[0006] 2) If the screen protection film is peeled off synchronously, due to the operation during peeling, the screen protection film is likely to lift the release material layer, which not only makes it difficult for the film to detach, but also increases the probability of film deformation, and at the same time increases the difficulty of controlling the tension of the release material layer (such as: release film);

[0007] 3) There is also an important factor during the peeling process, that is, how to maintain the flatness of the entire screen protection film (both of the above two implementation methods have flatness defects), because once an offset occurs, it will directly lead to a reduction in the quality of the subsequent film sticking (such as: air pockets, bubbles, etc.). Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a brand-new film peeling unit for a screen protection film.

[0009] At the same time, the present invention also relates to a film peeling process for a screen protection film.

[0010] To achieve the above purpose, the solution adopted by the present invention is:

[0011] A film peeling unit for a screen protection film, which includes a peeling seat located above the peeling station, a negative pressure suction head installed on the peeling seat, an angle adjustment component for driving the negative pressure suction head to press down or tilt upwards around the horizontal direction from the front end, and a peeling power component for driving the peeling seat to move up and down. The bottom surface of the negative pressure suction head forms suction holes and the inside forms a suction cavity. Among them, the negative pressure suction head includes a suction head mold at the front end and a plate-shaped suction mold aligned with the suction head mold. The suction holes on the bottom surface of the suction head mold are long holes extending along the front-back direction, and multiple long holes are arranged side by side along the left-right direction; the suction holes on the bottom surface of the plate-shaped suction mold are circular holes and are arranged in an array; the angle adjustment component includes a pivot joint part located at the rear end of the negative pressure suction head and capable of rotatably connecting with the peeling seat, and an adjustment part for rotatably connecting the front end of the negative pressure suction head with the peeling seat and sliding along the front-back direction. Among them, the front and rear ends of the negative pressure suction head rotate synchronously around the horizontal direction, and the front end of the negative pressure suction head slides in the front-back direction. After each screen protection film moves to the peeling station, the negative pressure suction head fully adheres to the surface of the screen protection film under angle adjustment, and when the component forces formed by the suction force provided by the negative pressure suction head to the screen protection film and the peeling force provided by the forward movement of the release material layer to the screen protection film in the up-down direction are in a balanced state, the screen protection film peels off the release material layer in dynamic balance.

[0012] According to a specific implementation and preferred aspect of the present invention, the angle formed by the release material layer and the screen protection film in the peeling station with the horizontal plane is α, and α ≤ 15°. At this angle, the screen protection film is peeled off smoothly and without deviation while maintaining dynamic balance.

[0013] Preferably, 1° ≤ α ≤ 8°. Generally, 1° - 5° is the best. In some specific implementation manners, based on the decomposition of the α angle, the component forces formed by the suction force provided by the negative pressure suction head to the screen protection film and the peeling force provided by the forward movement of the release material layer to the screen protection film in the up-down direction are in a balanced state. In this way, the balance of forces is synchronously adjusted with the change of the angle, so that the screen protection film gradually peels off the release material layer while maintaining dynamic balance, avoiding displacement or damage to the flatness of the screen protection film and improving the quality of the film covering.

[0014] According to a specific implementation and preferred aspect of the present invention, the area of the long hole is larger than the area of the circular hole, and the area of the long hole is at least 5 - 10 times the area of the circular hole. Here, different suction forces are provided based on the long holes and circular holes formed by the head, which is not only convenient for tearing operation but also convenient for subsequent pasting operation.

[0015] According to another specific implementation and preferred aspect of the present invention, the power output directions of the peeling power component and the angle adjustment component are the same. Based on the same power direction, it is possible to avoid movement interference caused by the inclination of the angle power direction during the lifting process.

[0016] Preferably, the angle adjustment component includes a pivot joint portion located at the rear end of the negative pressure suction head and capable of rotatably connecting with the peeling seat, and an adjustment portion for rotatably connecting the front end of the negative pressure suction head with the peeling seat and slidingly connecting along the front-rear direction. The front and rear ends of the negative pressure suction head rotate synchronously around the horizontal direction, and the front end of the negative pressure suction head slides in the front-rear direction. In short, based on the cooperation of the sliding and rotation of the front end, the same power direction as described above is achieved, and it is kept in a triangular distribution during the pressing or tilting action to improve the sensitivity and stability of the angle adjustment.

[0017] In some specific embodiments, the adjustment portion includes a mounting seat fixed on the negative pressure suction head, a sliding seat with its lower end slidingly mounted on the mounting seat along the front-rear direction, and a power rod mounted on the peeling seat and moving up and down telescopically. The lower end of the power rod is rotatably connected to the upper end of the sliding seat. Further, the sliding seat includes a seat body and a seat frame rod fixedly mounted on the seat body. The upper end of the seat frame rod and the lower end of the power rod are rotatably connected through a rotating shaft. That is, through the cooperation of sliding and rotation, the angle adjustment is realized around the rear end in the up-down direction of the acting force.

[0018] Preferably, the pivot joint portion includes a lug mounted on the negative pressure suction head, a hanging edge mounted on the peeling seat and located between the two lugs, and a pivot shaft mounted on the hanging edge and rotatably connected to the lug through bearings. Based on the design of the pivot shaft, it is convenient to implement the rotation adjustment and installation. In this example, the pivot shaft is located at the bottom of the hanging edge, and the hanging edge is perpendicular to the bottom surface of the peeling seat.

[0019] In addition, the peeling power member is a power device composed of a telescopic rod or a power lead screw.

[0020] Another technical solution of the present invention is: a film peeling process for a screen protection film, which adopts the above-mentioned film peeling unit for the screen protection film and includes the following steps:

[0021] 1) Negative pressure adsorption and fitting on the surface of the screen protection film

[0022] After entering the film peeling station, the screen protection film and the release material layer are kept in alignment and the forward transmission is paused. Then, after the front end of the negative pressure suction head at the film peeling station is pressed down and adjusted to be at the same inclination angle as the film peeling station, it is then adsorbed and fitted to the surface of the screen protection film through negative pressure.

[0023] 2) Dynamic balance peeling

[0024] The release material layer moves forward. At the same time, the front end of the negative pressure suction head tilts up and the negative pressure suction head is driven to lift upward synchronously by the peeling power member. The component forces formed by the adsorption force provided by the negative pressure suction head to the screen protection film and the peeling force provided by the forward movement of the release material layer to the screen protection film in the up-down direction are in a balanced state. That is, the screen protection film is gradually peeled off from the release material layer in dynamic balance.

[0025] Due to the application of the above-mentioned technology and equipment solutions, the present invention has the following advantages compared with the prior art:

[0026] In the existing film peeling process, if the end is lifted and then peeled off gradually, the existence of the lifted part will cause a high probability that the screen protector will be peeled off the display screen due to external force; if the screen protector is peeled off synchronously, the screen protector is easy to bring up the release material layer due to the peeling operation, which not only makes it difficult to peel off the film, but also increases the probability of film deformation, and also increases the difficulty of controlling the tension of the release material layer; in addition, there is an important factor in the peeling process, that is, how to maintain the flatness of the entire screen protector (both of the above two embodiments have flatness defects), because once the deviation is caused, it directly leads to the shortcomings of low quality of the subsequent film application (such as: hollowing, bubbles, etc.), and the present invention designs the film peeling structure of the screen protector as a whole, cleverly solves the shortcomings of the prior art, and after using the film peeling unit of the screen protector, first, the screen protector and the release material layer after entering the film peeling station are kept aligned and the forward transmission is suspended, and then the front end of the negative pressure adsorption head of the film peeling station is pressed down to adjust and After the tilt angles of the film peeling stations are consistent, the surface of the screen protector film is adhered by negative pressure adsorption; secondly, the release material layer is transmitted forward, and at the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the peeling power member to lift the negative pressure adsorption head upward, and the adsorption force provided by the negative pressure adsorption head to the screen protector film and the peeling force provided by the forward movement of the release material layer to the screen protector film in the upper and lower directions are in a balanced state, that is, the screen protector film is gradually peeled off the release material layer in dynamic balance. Therefore, on the one hand, the present invention combines the dynamic balance formed by multiple forces of the screen protector film, and gradually peels it off during movement to avoid causing the screen protector film to deviate, thereby improving the flatness and state accuracy of the peeled screen protector film, so as to provide a high-quality operation basis for subsequent attachment; on the other hand, based on the decomposition of the force formed by the tilted film peeling station, it is more conducive to the peeling of the screen protector film in dynamic balance, and at the same time, it will not cause the end head to tilt, and also reduce the deformation rate of the screen protector film or the release release material layer, thereby reducing the difficulty of peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the film peeling structure of the screen protector film of this embodiment;

[0028] Figure 2 for Figure 1 A schematic diagram of the main view;

[0029] Figure 3 for Figure 2 Schematic diagram of top view;

[0030] Figure 4 for Figure 1 A schematic diagram of the structure of the middle release material layer reeling and unreeling unit;

[0031] Figure 5 is the front view schematic diagram of Figure 4 ;

[0032] Figure 6 is Figure 5 's top view schematic diagram;

[0033] Figure 7 is Figure 1 the structural schematic diagram of the screen saver film peeling unit in

[0034] Figure 8 is Figure 7 's front view schematic diagram in

[0035] Figure 9 is Figure 8 the enlarged structural schematic diagram of the negative pressure adsorption head in

[0036] Figure 10 is Figure 9 's bottom view schematic diagram;

[0037] Among them: 1. Rewinding and unreeling unit of release material layer; 10. Unreeler; 11. Reeler; 12. Transferrer; 120. Transfer roller; 121. Transfer material head; 122. Transfer material roller; 123. Transfer rack; 13. Static eliminator; s. Transfer stratification; s1. Feeding section; s11. First subsection; s12. Second subsection; s2. Returning material section;

[0038] 2. Screen saver film peeling unit; 20. Peeling seat; 21. Negative pressure adsorption head; 210. Adsorption head mold; 211. Plate - type adsorption mold; k1, k2. Adsorption holes; 22. Angle adjustment component; 220. Pivoting part; 221. Adjusting part; a. Mounting seat; b. Slide seat; b1. Seat body; b2. Seat frame rod; c. Power rod; d. Suspension ear; e. Hanging edge; f. Pivot; 23. Peeling power component;

[0039] 3. Shifting unit; 30. Track; 31. Shifting seat; 32. Shifting power device;

[0040] m. Screen saver film; n. Release material layer. Detailed implementation manners

[0041] To make the above - mentioned objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0044] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature. It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0046] As Figures 1 to 3 shown, the film peeling structure of the screen saver film in this embodiment mainly includes a release material layer winding and unwinding unit 1, a screen saver film peeling unit 2, and a displacement unit 3 that drives the screen saver film peeling unit 2 to move and transfer in the left - right direction.

[0047] Specifically, the screen saver film m is laminated on the release material layer n at intervals and is wound into a roll along with the release material layer n. The release material layer n is a thin film layer.

[0048] In some specific embodiments, the release material layer winding and unwinding unit 1 includes an unwinder 10, a winder 11, and a transferrer 12. The unwound release material layer n is wound by the winder 11 after passing through the transferrer 12.

[0049] Combined with Figures 4 to 6 shown, the unwinder 10 and the winder 11 are installed on the same frame. The film withdrawn from the unwinder 10 is transmitted forward, and under the transfer of the transferrer 12, a transfer layer s is formed in the transmission path. That is, the transfer layer s includes a feeding section s1 located in the upper layer and a return section s2 located in the lower layer. The feeding section s1 is docked with the unwinder 10, and the return section s2 is docked with the winder 11. Based on the settings of the feeding section and the return section, the cycle of unwinding, peeling, and winding of the release material layer can be realized.

[0050] In some specific embodiments, the unwinder 10 is a common reel structure, and it mainly unwinds by the reverse self - rotation of the winding disk. The transferrer 12 includes a plurality of transfer rollers 120 located between the unwinder 10 and the winder 11. The plurality of transfer rollers 120 are arranged in the up - down and front - back directions to form a transfer layer s.

[0051] In this example, the feeding section s1 includes a first segment s11 and a second segment s12 with a height difference formed by the static eliminator 13. The second segment s12 constitutes the film peeling station. Here, based on the static eliminator to eliminate the static electricity of the screen saver film, the quality of the film lamination is further improved. Based on the design of the height difference, it is not only convenient for the implementation of static elimination, but also more conducive to arranging the inclined film peeling station in the long transmission line. Further, the static eliminator is a static bar.

[0052] The transfer device 12 also includes a transfer head 121 and a transfer roller 122 disposed at the static eliminator 13. Two transmission rollers 120 are arranged in an aligned manner at the front end of the second segment s12, wherein a film peeling station is formed between the transfer roller 122 and the transmission roller 120 above the second segment s12, which is relatively tensioned and suspended and tilted by the transfer head 121 and the transmission roller 120 below the second segment s12. With the aid of the height difference, a relatively tensioned, suspended and tilted film peeling station is formed in combination with the transfer head 121, the transfer roller 122 and the transmission roller 120. That is, a film peeling station tilted from top to bottom along the forward transmission direction is formed in the transfer path, and the screen protector m keeps tilting synchronously with the release material layer n and passes through the film peeling station upward. In this example, the transmission roller 120, the transfer head 121 and the transfer roller 122 are all assembled using a transfer frame 123.

[0053] In some specific embodiments, the angle formed by the release material layer n and the screen protector m in the film peeling station and the horizontal plane is α, and α≤15°. Preferably, 1°≤α≤8°. Generally, 1° to 5° is optimal. At this angle, the screen protector is peeled off smoothly and without deviation while maintaining dynamic balance.

[0054] Combination Figures 7 to 10 As shown, the screen saver film peeling unit 2 includes a peeling seat 20 located above the film peeling station, a negative pressure adsorption head 21 installed on the peeling seat 20, an angle adjustment component 22 that drives the negative pressure adsorption head 21 to be pressed down or tilted up from the front end in a horizontal direction, and a peeling power piece 23 that drives the peeling seat 20 to rise and fall. After each screen saver film m moves to the film peeling station, the negative pressure adsorption head 21 fully adheres to the surface of the screen saver film m under angle adjustment, and the front end of the negative pressure adsorption head 21 is tilted and synchronously driven by the peeling power piece 23 to lift the negative pressure adsorption head 21 upward so that the screen saver film m is peeled off the release material layer n in dynamic balance.

[0055] In some specific embodiments, the bottom surface of the negative pressure adsorption head 21 forms adsorption holes and the inside forms an adsorption cavity; here, the soft layer screen protector m is adsorbed, transferred and attached by vacuuming. In this example, the negative pressure adsorption head 21 includes an adsorption head mold 210 located at the front end and a plate adsorption mold 211 aligned with the adsorption head mold 210, wherein the adsorption holes k1 on the bottom surface of the adsorption head mold 210 are elongated holes extending along the front-to-back direction, and a plurality of elongated holes are arranged side by side along the left-to-right direction; the adsorption holes k2 on the bottom surface of the plate adsorption mold 211 are circular holes and arranged in an array. Furthermore, the area of ​​the elongated hole is larger than the area of ​​the circular hole, wherein the area of ​​the elongated hole is at least 5 to 10 times the area of ​​the circular hole. Here, different adsorption forces are provided based on the elongated holes and circular holes formed by the head, which is not only convenient for the tearing operation, but also for the subsequent attachment operation.

[0056] In this example, the separation driving member 23 and the angle adjusting member 22 have the same power output direction. Based on the same power direction, it is to avoid movement interference caused by the inclination of the angle power direction during the lifting process. The angle adjusting member 22 includes a pivoting portion 220 located at the rear end of the negative pressure suction head 21 and capable of being rotatably connected to the separation base 20, and an adjusting portion 221 for rotatably connecting the front end of the negative pressure suction head 21 to the separation base 20 and slidingly connecting along the front-rear direction. Among them, the front and rear ends of the negative pressure suction head 21 rotate synchronously around the horizontal direction, and the front end of the negative pressure suction head 21 slides in the front-rear direction. In short, based on the cooperation of the sliding and rotation of the front end, the same power direction as above is achieved, and it is kept in a triangular distribution during the pressing or tilting action to improve the sensitivity and stability of the angle adjustment.

[0057] In some specific embodiments, the pivoting portion 220 includes a lug d mounted on the negative pressure suction head 21, a hanging edge e mounted on the separation base 20 and located between the two lugs d, and a pivot shaft f mounted on the hanging edge e and rotatably connected to the lug through bearings. Based on the design of the pivot shaft, it is convenient to implement rotational adjustment and installation. In this example, the pivot shaft is located at the bottom of the hanging edge, and the hanging edge is perpendicular to the bottom surface of the separation base. The adjusting portion 221 includes a mounting seat a fixed on the negative pressure suction head 21, a sliding seat b whose lower end is slidably mounted on the mounting seat a along the front-rear direction, and a power rod c mounted on the separation base 20 and performing vertical telescopic movement. Among them, the lower end of the power rod c is rotatably connected to the upper end of the sliding seat b. Further, the sliding seat b includes a seat body b1 and a seat frame rod b2 fixedly mounted on the seat body b1. Among them, the upper end of the seat frame rod b2 and the lower end of the power rod c are rotatably connected through a rotating shaft. That is, through the cooperation of sliding and rotation, the angle adjustment is implemented around the rear end in the up-down direction of the acting force.

[0058] In some specific embodiments, the separation driving member 23 is a power device composed of a telescopic rod or a power lead screw. In this example, both the separation driving member 23 and the power rod c are driven to expand and contract by air cylinders.

[0059] As for the shifting unit 3, it adopts a conventional track 30, a shifting seat 31 and a shifting power device 32. Among them, the shifting seat 31 is horizontally shifted and loaded along the track under the push of the shifting power device 32. Therefore, based on the loading, the separated screen protector film m is sent to the film pasting station to perform high-quality film pasting in a flat and non-offset mode.

[0060] In summary, the implementation process of this embodiment is as follows:

[0061] S1. Planning of the film layer transmission path

[0062] After the screensaver film m unrolled by the uncoiler 10 and the release material layer n are transported forward and pass through the transfer of the transfer device 12 to form an upper and lower transport stratification, the release material layer n is sent to the coiler 11 for coiling. Among them, in the transport path of the upper layer, there is a film peeling station that slopes downward from top to bottom along the forward transport direction;

[0063] S2. Sequential feeding of the screensaver film

[0064] During the backward and coiling movement of the release material layer n, the screensaver film m remains tilted synchronously with the release material layer n and passes upward through the film peeling station for feeding each piece of the screensaver film m;

[0065] S3. Peeling off of the screensaver film

[0066] After entering the film peeling station, the screensaver film m and the release material layer n remain in alignment and pause to move forward. Then, the front end of the negative pressure suction head 21 at the film peeling station is pressed down and adjusted to be consistent with the inclination angle of the film peeling station, and then the surface of the screensaver film is adhered by negative pressure suction. Next, the release material layer n moves forward. At the same time, the front end of the negative pressure suction head 21 tilts up and is synchronously driven by the peeling power member 23 to lift the negative pressure suction head 21 upward. Therefore, the screensaver film m is gradually peeled off from the release material layer n in dynamic balance.

[0067] In this example, during the peeling process, based on the decomposition of α = 8°, the component forces formed by the suction force provided by the negative pressure suction head 21 to the screensaver film m and the peeling force provided by the forward movement of the release material layer n to the screensaver film m in the up and down directions are in a balanced state. In this way, the balance of the force is synchronously adjusted with the change of the angle, so that the screensaver film is gradually peeled off from the release material layer in dynamic balance to avoid displacement or damage to the flatness of the screensaver film and improve the quality of the film laminating.

[0068] In summary, after adopting the film peeling structure of the screen protector film, firstly, based on the unwinding, peeling and winding of the release material layer winding and unwinding unit, the dynamic circulation of the release material layer is realized, and at the same time, the screen protector film attached to the release material layer is kept entering the film peeling station; secondly, based on the negative pressure adsorption head under angle adjustment, it tilts downward and fully fits the surface of the screen protector film, and at the same time, driven forward by the release material layer, the front end of the negative pressure adsorption head is lifted up and synchronously driven by the peeling power part to lift the negative pressure adsorption head upward so that the screen protector film is gradually peeled off the release material layer in dynamic balance. Therefore, on the one hand, the present invention combines the dynamic balance formed by multiple forces of the screen protector film, and gradually peels it off during movement to avoid causing the screen protector film to deviate, thereby improving the flatness and state accuracy of the peeled screen protector film, so as to provide a high-quality operation basis for subsequent attachment. On the other hand, it can also realize the dynamic circulation of the release material layer, and based on the decomposition of the force formed by the inclined film peeling station, it is more conducive to the peeling of the screen protector in dynamic balance, and at the same time will not cause the end head to lift up, and also reduce the deformation rate of the screen protector or the release material layer, thereby reducing the difficulty of peeling; on the third aspect, during the peeling process, the adsorption force provided by the negative pressure adsorption head to the screen protector and the peeling force provided by the forward movement of the release material layer to the screen protector are in a balanced state in the up and down directions. In this way, the balance of forces is adjusted synchronously with the change of the angle, so that the screen protector maintains dynamic balance and gradually peels off the release material layer, so as to avoid displacement of the screen protector or damage to the flatness, and improve the lamination quality; on the fourth aspect, the angle formed by the release material layer and the screen protector in the film peeling station and the horizontal plane is α, and α≤15°.At this angle, the peeling of the screen protector film is carried out while maintaining dynamic balance, with the film being flat and without deviation. Generally, an angle of 1° to 5° is optimal. Fifthly, the transfer device includes a plurality of transfer rollers located between the unwinder and the winder. Among them, the plurality of transfer rollers are arranged in the up-and-down and front-and-back directions to form a transfer layer. The transfer layer includes a feeding section located in the upper layer and a return section located in the lower layer. Based on the settings of the feeding section and the return section, the cycle of unwinding, peeling, and winding of the release material layer can be realized. Sixthly, based on the static eliminator, the static electricity of the screen protector film is eliminated, further improving the quality of the film lamination. Based on the design of the height difference, it is not only convenient for the implementation of static elimination, but also more conducive to arranging the inclined film peeling station in the long transmission line. At the same time, with the assistance of the height difference, combined with the transfer head, transfer roller, and transfer roller, a relatively tensioned suspended inclined film peeling station is formed. Seventhly, the power output directions of the peeling power component and the angle adjustment component are the same. Based on the same power direction, it is possible to avoid movement interference caused by the inclination of the angle power during the lifting process. At the same time, based on the cooperation of the sliding and rotation at the front end, the same power direction is realized, and it is kept in a triangular distribution during the pressing or lifting action to improve the sensitivity and stability of the angle adjustment. Eighthly, through the cooperation of sliding and rotation, the angle adjustment is carried out around the rear end in the up-and-down direction of the acting force. Based on the design of the pivot, it is convenient for the implementation of rotational adjustment and installation. Ninthly, based on the adsorption holes on the bottom surface of the adsorption head die being long holes extending along the front-and-back direction, and multiple long holes being arranged side by side along the left-and-right direction; the adsorption holes on the bottom surface of the plate-type adsorption die are circular holes and are arranged in an array. At the same time, the area of the long hole is larger than the area of the circular hole, and the area of the long hole is at least 5 to 10 times the area of the circular hole. Here, based on the long holes and circular holes formed by the head providing different adsorption forces, it is not only convenient for the peeling operation, but also convenient for the subsequent pasting operation. Tenthly, the displacement unit adopts conventional tracks, displacement seats, and displacement power devices. Among them, the displacement seat is horizontally translated and loaded along the track under the push of the displacement power device. Therefore, based on the loading, the peeled screen protector film is sent to the film pasting station to carry out high-quality film pasting in a flat and non-deviating mode.

[0069] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A film peeling unit for a screen saver film, characterized in that: It includes a peeling seat located above the film peeling station, a negative pressure adsorption head installed on the peeling seat, an angle adjustment component that drives the negative pressure adsorption head to press down or rise from the front end in the horizontal direction, and a peeling power component that drives the peeling seat to rise and fall. The bottom surface of the negative pressure adsorption head forms adsorption holes, and the inside forms an adsorption cavity. The negative pressure adsorption head includes an adsorption head mold located at the front end and a plate-type adsorption mold aligned with the adsorption head mold. The adsorption holes on the bottom surface of the adsorption head mold are long holes extending in the front-to-back direction, and multiple long holes are arranged side by side in the left-to-right direction; the adsorption holes on the bottom surface of the plate-type adsorption mold are circular holes and arranged in an array; the angle adjustment component includes a suction hole located at the front end and a suction hole located at the bottom surface of the plate-type adsorption mold. A pivotal part at the rear end of the negative pressure adsorption head that can be rotatably connected to the peeling seat, and an adjusting part used to rotate the front end of the negative pressure adsorption head and the peeling seat and slide along the front-to-back direction, wherein the front and rear ends of the negative pressure adsorption head rotate synchronously around the horizontal direction, and the front end of the negative pressure adsorption head slides in the front-to-back direction. After each screen protector film moves to the film peeling station, the negative pressure adsorption head fully fits the surface of the screen protector film under angle adjustment, and the adsorption force provided by the negative pressure adsorption head to the screen protector film and the peeling force provided by the release material layer to the screen protector film when it moves forward are in a balanced state in the upper and lower directions so that the screen protector film is peeled off the release material layer in dynamic balance.

2. The film peeling unit of the screen protection film according to claim 1, characterized in that: The angle formed by the release material layer and the screen protection film in the film peeling station and the horizontal plane is α, and α≤15°.

3. The film peeling unit of the screen protection film according to claim 2, characterized in that: 1°≤α≤8°。 4. The film peeling unit of the screen protection film according to claim 1, characterized in that: The area of ​​the elongated hole is larger than that of the circular hole, and the area of ​​the elongated hole is at least 5 to 10 times that of the circular hole.

5. The film peeling unit of the screen protection film according to claim 1, characterized in that: The power output directions of the peeling power part and the angle adjustment part are the same.

6. The film peeling unit of the screen protection film according to claim 1, characterized in that: The adjustment part includes a mounting seat fixed on the negative pressure adsorption head, a sliding seat whose lower end is slidably mounted on the mounting seat along the front-rear direction, and a power rod installed on the peeling seat and telescopically moving up and down, wherein the lower end of the power rod and the upper end of the sliding seat are rotatably connected.

7. The film peeling unit of the screen protection film according to claim 6, characterized in that: The sliding seat comprises a seat body and a seat frame rod fixedly mounted on the seat body, wherein the upper end of the seat frame rod and the lower end of the power rod are rotationally connected via a rotating shaft.

8. The film peeling unit of the screen protection film according to claim 1, characterized in that: The pivoting part includes a lifting ear mounted on the negative pressure adsorption head, a hanging edge mounted on the peeling seat and located between two lifting ears, and a pivot mounted on the hanging edge and rotatably connected to the lifting ears through bearings.

9. The film peeling unit of the screen protection film according to claim 1, characterized in that: The peeling power piece is a power device composed of a telescopic rod or a power lead screw.

10. A screen protector film peeling process, characterized in that: The device adopts the film peeling unit of the screen protector film according to any one of claims 1 to 9, and comprises the following steps: 1) Negative pressure adsorption fits the screen protector surface After entering the film peeling station, the screen protector film and the release material layer are kept aligned and the forward transmission is suspended. Then, the front end of the negative pressure adsorption head of the film peeling station is pressed down and adjusted to be consistent with the tilt angle of the film peeling station, and then the negative pressure adsorption is used to adhere to the surface of the screen protector film. 2) Dynamic balance separation The release material layer is transmitted forward, and at the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the peeling power part to lift the negative pressure adsorption head upward. The adsorption force provided by the negative pressure adsorption head to the screen saver film and the peeling force provided by the forward movement of the release material layer to the screen saver film are in a balanced state in the upper and lower directions. That is, the screen saver film is gradually peeled off the release material layer in dynamic balance.

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