Screen protection film uncovering process

Abstract

The invention discloses a film uncovering process for a screen protection film. The film uncovering process comprises the following steps: 1) planning a film layer transmission path; (2) sequentially feeding the screen protection films; and 3) uncovering the screen protection film. On the one hand, on the basis of the design of an inclined film uncovering station in a feeding path and by adopting the matching of the tearing angle and height of a floating type negative pressure adsorption head, a release material layer of a screen protection film is gradually uncovered in dynamic balance, meanwhile, the release material layer can be recycled, the screen protection film can be continuously supplied, the uncovering difficulty is reduced, and high-quality film tearing is kept; on the other hand, on the basis that the power output directions of the uncovering power part and the angle adjusting part are the same, motion interference caused by inclination of the angle power direction in the lifting process is avoided, meanwhile, on the basis of cooperation of sliding and rotating of the front end, triangular distribution is kept in the downward pressing or tilting action, and the sensitivity and stability of angle adjustment are improved.

Description

[0001] This application is a divisional application with the application date of November 14, 2024; application number 2024116229527; and the name is A curved screen laminating process. Technical Field

[0002] The invention belongs to the technical field of film peeling, and in particular relates to a process for peeling off a screen saver film. Background Art

[0003] At present, lamination is an indispensable process in the production of electronic screens, and the lamination process includes peeling off the film and applying the film. Peeling off the film refers to peeling off the screen protector from the release material layer, and applying the film refers to applying the peeled screen protector to the screen. At the same time, the screen protector is relatively spaced on the release material layer and is rolled up together with the release material layer. When the film needs to be peeled off, it is first unrolled and then peeled off. Finally, the peeled screen protector is moved to the film applying station for film applying.

[0004] However, with the development of electronic screens, curved screens are also widely used in life. Therefore, the current coating has the following technical defects:

[0005] 1) Whether it's a straight or curved screen, during the peeling process, if the end of the screen protector is lifted and then peeled off gradually, the presence of the lifted portion will increase the probability of the screen protector being peeled off the screen due to external force. If the screen protector is peeled off simultaneously, the screen protector is likely to pick up the release material layer during the peeling operation, making it difficult to peel off the film and increasing the probability of film deformation. It also increases the difficulty of controlling the tension of the release material layer (such as the release film). In addition, another important factor in the peeling process is how to maintain the flatness of the entire screen protector (both the above two embodiments have flatness defects). Once the deviation occurs, it will directly lead to reduced quality of the subsequent film application (such as hollowing, bubbles, etc.).

[0006] 2) In most cases, the screen protector is attached to the screen surface while the screen-sticking mechanism is moving, while the screen protector remains stationary. This method is generally suitable for flat products. However, if the screen is curved, the angle of the screen protector needs to be changed in real time. Therefore, the resulting screen protector cannot meet the attachment requirements, resulting in insufficient practicality. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a new screen protector film peeling process.

[0008] To achieve the above object, the present invention adopts a solution: a screen protector film peeling process, which includes the following steps:

[0009] 1) Film transmission path planning

[0010] It adopts the method of automatic unwinding, transferring and rewinding to form the path setting of the release material layer, and the transmission path is layered, the upper layer is the feeding path, and the lower layer is the return path, wherein at least a part of the feeding path forms a film peeling station that is forward and downward inclined;

[0011] 2) Feeding of screen protector film in sequence

[0012] The screen protector film is unrolled along with the release material layer one by one along the transmission path. As the release material layer is unwinding and rolling, the screen protector film is tilted synchronously with the release material layer and passes through the film peeling station upward.

[0013] 3) Removing the screen protector

[0014] After entering the film peeling station, the screen protector film stops being transported forward, and 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 inclination angle of the film peeling station, and then it is adhered to the surface of the screen protector film by negative pressure adsorption, and then the release material layer is transported forward. At the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the up and down moving peeling power part to lift the negative pressure adsorption head upward so that the screen protector film is gradually peeled off from the release material layer in dynamic balance; the power output direction of the peeling power part and the angle adjustment part are the same; the angle adjustment part includes a pivot part located at the rear end of the negative pressure adsorption head and capable of being rotatably connected to the peeling seat, and an adjustment part for rotating the front end of the negative pressure adsorption head and the peeling seat and slidingly connecting them along the front and rear directions, 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 and rear directions.

[0015] According to a specific embodiment and preferred aspect of the present invention, when peeling off the screen protector, the upward tilt angle is equal to the tilt angle of the peeling station, so that the direction of the combined force is horizontal, thereby facilitating the peeling off of the screen protector.

[0016] Preferably, the angle formed by the release material layer and the screen protector at the film peeling station and the horizontal plane is α, and α≤15°. At this angle, the screen protector is peeled off smoothly and without deviation while maintaining dynamic balance. In some specific embodiments, 1°≤α≤8°. Generally, 1° to 5° is optimal. In this example, during the peeling process, based on the decomposition of α=1°, the components of force formed in the upper and lower directions by 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 this way, the balance of forces is adjusted synchronously with the change of the angle, so that the screen protector is gradually peeled off the release material layer while maintaining dynamic balance, so as to avoid displacement or damage to the flatness of the screen protector and improve the quality of the coating.

[0017] Ideally, during the peeling process, the vertical components of the suction force exerted by the negative pressure head on the screen protector and the peeling force exerted by the forward movement of the release material layer on the screen protector are in equilibrium. This balance of forces is adjusted synchronously with the angle, allowing the screen protector to be gradually peeled off the release material layer while maintaining dynamic equilibrium. This prevents the screen protector from shifting or damaging its flatness, thereby improving lamination quality.

[0018] According to another specific embodiment and preferred aspect of the present invention, the negative pressure adsorption head comprises a head adsorption chamber and a main body adsorption chamber, wherein the adsorption force generated by the head adsorption chamber is greater than that generated by the main body adsorption chamber. The head forms a tear-off gap after the head is peeled off, and then, during movement, the screen protector gradually separates from the release material layer while maintaining a flat and adherent fit. Furthermore, the greater adsorption force generated by the head facilitates not only the tear-off operation but also the subsequent attachment operation.

[0019] Preferably, the negative pressure adsorption head includes an adsorption head mold and a plate-type adsorption mold aligned with the adsorption head mold. The adsorption cavities of the adsorption head mold and the plate-type adsorption mold are not connected to each other, and are arranged correspondingly to the head adsorption area and the main body adsorption area. Because the adsorption cavities are not connected, pressure relief can be performed sequentially. Especially during the film lamination process, a sequential pressure relief method can be used to maintain a smoother adhesion to the screen surface.

[0020] In some specific embodiments, the adsorption holes in the head adsorption area are elongated holes extending in the front-to-back direction, with multiple elongated holes arranged side by side in the left-to-right direction; the adsorption holes in the body adsorption area are circular holes arranged in an array; furthermore, the area of ​​the elongated holes is larger than that of the circular holes, and the area of ​​the elongated holes is at least 5 to 10 times that of the circular holes. During the peeling and attaching process, the different sizes of the holes generate different forces, and the sequential action occurs, thereby optimizing the lamination process.

[0021] According to another specific implementation and preferred aspect of the present invention, the power output directions of the peeling power member and the angle adjustment member are the same. Based on the same power direction, the lifting process is prevented from causing motion interference due to the tilt of the angle power direction. Preferably, the angle adjustment member includes a pivot portion located at the rear end of the negative pressure adsorption head and capable of being rotatably connected to the peeling seat, and an adjustment portion for rotating the front end of the negative pressure adsorption head with the peeling seat and slidingly connected along the front-to-back direction, wherein the front and rear ends of the negative pressure adsorption head are synchronously rotated around the horizontal direction, and the front end of the negative pressure adsorption head slides in the front-to-back direction. In short, based on the cooperation of the sliding and rotation of the front end, the above-mentioned same power direction is achieved, and it is kept distributed in a triangular shape during the downward pressing or lifting action to improve the sensitivity and stability of the angle adjustment.

[0022] In some specific embodiments, the adjustment portion includes a mounting base fixed to the negative pressure adsorption head, a sliding base with its lower end slidably mounted on the mounting base in a front-to-rear direction, and a power rod mounted on the peeling base for vertical telescopic movement, wherein the lower end of the power rod is rotatably connected to the upper end of the sliding base. Furthermore, the sliding base includes a base body and a seat frame rod fixedly mounted to the base body, wherein the upper end of the seat frame rod and the lower end of the power rod are rotatably connected via a rotating shaft. In other words, through the combination of sliding and rotation, angular adjustment is achieved around the rear end in the vertical direction of the applied force.

[0023] Preferably, the pivotal connection comprises a lug mounted on the negative pressure suction head, a hanging edge mounted on the peeling seat and positioned between the two lugs, and a pivot mounted on the hanging edge and rotatably connected to each lug via a bearing. The pivot design facilitates rotational adjustment and installation. In this example, the pivot is located at the bottom of the hanging edge, which is perpendicular to the bottom surface of the peeling seat. The peeling power element is a power device consisting of a telescopic rod or a power screw.

[0024] Furthermore, the feed path has a first and second segment with a height difference. A static eliminator is installed at the height difference, and the second segment forms the film peeling station. The static eliminator eliminates static electricity from the film along the feed path to prevent deformation during film peeling and application, or disruption of dynamic balance due to static electricity, thereby achieving high-quality film lamination (smooth and bubble-free) on the screen. Specifically, the static eliminator is an anti-static bar.

[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 lead to a high probability that the screen protector will be peeled off the screen due to external force; if the screen protector is peeled off synchronously, the screen protector is likely 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 (such as: release film); 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 implementation methods have flatness defects), because once it is offset, it will directly lead to the deterioration of the quality of the subsequent film application (such as hollowing, bubbles, etc.) and other shortcomings. The present invention comprehensively designs the screen protector film peeling process, cleverly solving the shortcomings of the existing technology, and after adopting the screen protector film peeling process, first, the peeling is based on the release material layer winding and unwinding unit to form the unwinding and winding movement of the release material layer, and secondly, the screen protector is fed into The film peeling station, based on the negative pressure adsorption head, tilts downward and fully adheres to the surface of the screen protector film under angle adjustment. Finally, under the forward drive of the release material layer, the front end of the negative pressure adsorption head is lifted and the peeling power part drives the negative pressure adsorption head to lift 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 is based on the design of an inclined film peeling station in the feeding path, and adopts the tearing angle and height coordination of the floating negative pressure adsorption head, so that the screen protector film is gradually peeled off the release material layer in dynamic balance, and at the same time, it can also recycle the release material layer and continuously supply the screen protector film, reducing the difficulty of peeling and maintaining high-quality film tearing; on the other hand, based on the same power output direction of the peeling power part and the angle adjustment part, the lifting process is prevented from causing motion interference due to the tilt of the angle power direction. At the same time, based on the cooperation of the sliding and rotation of the front end, a triangular distribution is maintained during the downward pressing or lifting action to improve the sensitivity and stability of the angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the screen protector film laminating device of this embodiment;

[0028] Figure 2 for Figure 1 The main schematic diagram of

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

[0030] Figure 4 for Figure 1 Schematic diagram of the structure of the middle film peeling device;

[0031] Figure 5 for Figure 4 The main schematic diagram of

[0032] Figure 6 for Figure 5Schematic top view of

[0033] Figure 7 for Figure 4 Schematic diagram of the structure of the middle release material layer winding and unwinding unit;

[0034] Figure 8 for Figure 7 The main schematic diagram of

[0035] Figure 9 for Figure 8 Schematic top view of

[0036] Figure 10 for Figure 4 Schematic diagram of the structure of the middle screen protection film peeling unit;

[0037] Figure 11 for Figure 10 The main view diagram in ;

[0038] Figure 12 for Figure 11 A magnified schematic diagram of the structure of the medium negative pressure adsorption head;

[0039] Figure 13 for Figure 11 Schematic diagram from above;

[0040] Figure 14 for Figure 1 Schematic diagram of the structure of the film coating device;

[0041] Figure 15 for Figure 14 The main schematic diagram of

[0042] Figure 16 for Figure 15 Schematic top view of ;

[0043] Wherein: J, film peeling device; 1, release material layer unwinding and rewinding unit; 10, unwinder; 11, rewinder; 12, transfer conveyor; 120, transmission roller; 121, transfer head; 122, transfer roller; 123, transfer frame; 13, static eliminator; s, transmission layer; s1, feeding section; s11, first segment; s12, second segment; s2, return section; 2, screen protector film peeling unit; 20, peeling seat; 21, negative pressure adsorption head; 210, adsorption head mold; 211, plate adsorption mold; k1, k2, adsorption hole; 22, angle adjustment component; 220, pivot part; 221, adjustment part; a, mounting seat; b, sliding seat; b1, seat body; b2, seat frame rod; c, power rod; d, lifting ear; e, hanging edge; f, pivot; 23, peeling power part;

[0044] F. Laminating device; 3. Transmission line; 30. Transmission rail; 31. Transfer trolley; 32. Carrier; 4. Shift unit; 40. Track; 41. Shift seat; 42. Shift power unit; 5. Laminating roller; 6. Fixed seat;

[0045] m, screen protector film; n, release material layer; E, car screen. DETAILED DESCRIPTION

[0046] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0049] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0050] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0051] like Figures 1 to 3 As shown, the laminating equipment used in the curved screen laminating process of this embodiment includes a film peeling device J and a laminating device F. After the film is peeled off by the film peeling device J, the film is applied by the laminating device F. The curved screen is a car-mounted screen E.

[0052] Specifically, the screen saver film m is pasted on the release material layer n at intervals and is wound into a roll along with the release material layer n. The peeling device J is used to peel off the screen saver film m from the unwound release material layer n, and the laminating device F is used to attach the screen saver film m to the screen.

[0053] Combine Figures 4 to 6 As shown, the film peeling device J mainly includes a release material layer winding and unwinding unit 1 and a screen protection film peeling unit 2.

[0054] Specifically, the screen protection film m is laminated on the release material layer n at intervals and is wound around the release material layer n to form a roll, wherein the release material layer n is a thin film layer.

[0055] In some specific embodiments, the release material layer unwinding unit 1 includes an unwinder 10 , a rewinder 11 , and a transfer conveyor 12 . The unwound release material layer n passes through the transfer conveyor 12 and is then rewound by the rewinder 11 .

[0056] Combine Figures 7 to 10As shown, the unwinder 10 and the rewinder 11 are mounted on the same frame. The film unwound from the unwinder 10 is transported forward and, under the transfer of the intermediate conveyor 12, the transport path forms a transport layer s. That is, the transport layer s includes a feed section s1 located on the upper layer and a return section s2 located on the lower layer. The feed section s1 is connected to the unwinder 10, and the return section s2 is connected to the rewinder 11. Based on the arrangement of the feed section and the return section, the cycle of unwinding, peeling, and rewinding of the release material layer can be achieved.

[0057] In some specific embodiments, the unwinder 10 is a commonly used winding shaft structure, which mainly implements unwinding by the reverse rotation of the winding disk; the transfer conveyor 12 includes a plurality of transmission rollers 120 located between the unwinder 10 and the winder 11, wherein the plurality of transmission rollers 120 are arranged in the up and down and front and back directions to form a transmission layer s.

[0058] In this example, the feed section s1 consists of a first segment s11 and a second segment s12, separated by a height difference created by a static eliminator 13. The second segment s12 forms the film removal station. The static eliminator eliminates static electricity from the screen protector, further improving the quality of the film. This height difference design not only facilitates static removal but also facilitates the placement of inclined film removal stations within long transmission lines. Furthermore, the static eliminator is an anti-static bar.

[0059] The transfer conveyor 12 also includes a transfer head 121 and a transfer roller 122, which are arranged at the static eliminator 13. Two transfer rollers 120 are arranged in a vertically aligned arrangement at the front end of the second segment s12. The transfer roller 122 and the transfer roller 120 above the second segment s12 are relatively tensioned and suspended in an inclined film peeling station by the transfer head 121 and the transfer roller 120 below the second segment s12. With the help of the height difference, and in combination with the transfer head 121, the transfer roller 122, and the transfer roller 120, a relatively tensioned, suspended, inclined film peeling station is formed. That is, a film peeling station is formed in the transfer path, tilted from top to bottom along the forward transmission direction. The screen protector film m maintains a synchronous tilt with the release material layer n and passes upward through the film peeling station. In this example, the transfer roller 120, the transfer head 121, and the transfer roller 122 are all assembled using a transfer frame 123.

[0060] In some specific embodiments, the angle formed by the release material layer n and the screen protector film m in the film removal station with the horizontal plane is α, and α is ≤ 15°. Preferably, 1° ≤ α ≤ 8°. Generally, 1° to 5° is optimal. At this angle, the screen protector film is removed smoothly and without deviation while maintaining dynamic balance.

[0061] Combine Figures 11 to 13As shown, the screen saver film peeling unit 2 includes a peeling seat 20 located above the 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 the horizontal direction, and a peeling power member 23 that drives the peeling seat 20 to move up and down. After each screen saver film m is moved to the peeling station, the negative pressure adsorption head 21 fully fits 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 member 23 to lift the negative pressure adsorption head 21 upward so that the screen saver film m is peeled off from the release material layer n in dynamic balance.

[0062] In some specific embodiments, adsorption holes are formed on the bottom surface of the negative pressure adsorption head 21 and an adsorption cavity is formed inside; here, the adsorption, transfer and attachment of the soft layer screen protector m are implemented 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 multiple 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 holes is larger than the area of ​​the circular holes, wherein the area of ​​the elongated holes is at least 5 to 10 times the area of ​​the circular holes. Here, different adsorption forces are provided based on the elongated holes and circular holes formed on the head, which not only facilitates the tearing operation, but also facilitates the subsequent attachment operation.

[0063] In this example, the power output directions of the peeling power member 23 and the angle adjustment member 22 are the same. Based on the same power direction, the lifting process can avoid motion interference caused by the tilt of the angle power direction. The angle adjustment member 22 includes a pivot portion 220 located at the rear end of the negative pressure adsorption head 21 and capable of being rotatably connected to the peeling seat 20, and an adjustment portion 221 for rotating the front end of the negative pressure adsorption head 21 with the peeling seat 20 and slidingly connected along the front-to-back direction, wherein the front and rear ends of the negative pressure adsorption head 21 are synchronously rotated around the horizontal direction, and the front end of the negative pressure adsorption head 21 slides in the front-to-back direction. In short, based on the cooperation of the sliding and rotation of the front end, the above-mentioned same power direction is achieved, and it is kept in a triangular distribution during the downward pressing or lifting action to improve the sensitivity and stability of the angle adjustment.

[0064] In some specific embodiments, the pivotal portion 220 includes a lug d mounted on the negative pressure adsorption head 21, a hanging edge e mounted on the peeling seat 20 and located between the two lugs d, and a pivot f mounted on the hanging edge e and rotatably connected to the lugs via bearings. Based on the design of the pivot, in order to facilitate rotation adjustment and installation, in this example, the pivot is located at the bottom of the hanging edge, and the hanging edge is arranged perpendicular to the bottom surface of the peeling seat. The adjustment portion 221 includes a mounting seat a fixed on the negative pressure adsorption head 21, a slide b whose lower end is slidably mounted on the mounting seat a along the front-to-back direction, and a power rod c mounted on the peeling seat 20 and capable of telescopic movement up and down, wherein the lower end of the power rod c is rotatably connected to the upper end of the slide b. Furthermore, the slide b includes a seat body b1, a seat frame rod b2 fixedly mounted on the seat body b1, wherein the upper end of the seat frame rod b2 is rotatably connected to the lower end of the power rod c via a rotating shaft. That is, through sliding and rotating cooperation, angle adjustment is implemented around the rear end in the vertical direction of the applied force.

[0065] In some specific embodiments, the peeling power member 23 is a power device composed of a telescopic rod or a power screw. In this example, the peeling power member 23 and the power rod c are both telescopically driven by cylinders.

[0066] Combine Figures 14 to 16 As shown, the laminating device F includes a transmission line 3 located on the opposite side of the film peeling station and corresponding to the laminating station, a shift unit 4 that drives the screen saver film m peeling unit to move horizontally left and right, and a laminating roller 5 installed at the front end of the negative pressure adsorption head 21 and capable of self-rotation. When laminating, the screen saver film peeling unit 2 is located above the laminating station, and is pressed down from the front end of the negative pressure adsorption head 21 to align and fit the front edge of the screen. During the forward transmission of the transmission line 3, and under the decompression or pressure release of the negative pressure adsorption head 21, the angle adjustment component 22 and the peeling power component 23 synchronously drive the negative pressure adsorption head 21 to move so that the screen saver film m maintains synchronous movement and fit with the changes in the screen surface, and the laminating roller 5 adaptively rolls the surface of the screen saver after attachment as the angle of the negative pressure adsorption head 21 changes.

[0067] In this example, a fixed base 6 is installed at the front end of the negative pressure suction head 21. The laminating roller 5 is rotatably mounted on the fixed base 6, with the bottom surface of the laminating roller 5 flush with the bottom surface of the negative pressure suction head 21. This allows the film to be applied and rolled at the same angle. During the laminating process, the downward pressure exerted by the negative pressure suction head 21 on the screen and the upward and downward forces exerted by the transmission line 3 on the screen are in a state of balance. In this way, the film is gradually attached to the screen as the traction force is applied.

[0068] In some specific embodiments, the conveyor line 3 includes a conveyor rail 30 extending horizontally in a front-to-back direction, a transfer trolley 31 traveling on the conveyor rail 30, and a carrier 32 mounted on the transfer trolley 31. Products are mounted on the carrier 32 with the screen facing upward. In short, based on the movement of the product and combined with the adjustment of the screen protector's adaptability angle and pressure, the screen protector is applied and rolled gradually and synchronously with the changes in the screen, achieving high-quality screen coating (flatness and bubble-free).

[0069] The shift unit 4 includes a track 40 horizontally arranged between the film peeling station and the laminating station, a shift seat 41 slidably arranged on the track 40, and a shift power device 42, wherein the screen saver film peeling unit 2 is installed on the shift seat 41, and the shift power device 42 drives the shift seat 41 to move horizontally along the track 40 to realize the position switching of the screen saver film peeling unit 2 between the film peeling station and the laminating station.

[0070] In summary, the implementation process of this embodiment is as follows:

[0071] S1. Peel off the film

[0072] ①. Film layer transmission path planning, which adopts the automatic unwinding, transfer and rewinding method to form the path setting of the release material layer, and the transmission path is layered, the upper layer is the feeding path, and the lower layer is the return path, wherein at least a part of the feeding path forms a film peeling station that is forward and downwardly inclined; ②. Sequential feeding of the screen protector film, which unfolds the screen protector film together with the release material layer one by one along the transmission path, and in the unwinding and rewinding movement of the release material layer, the screen protector film keeps synchronous inclination with the release material layer and passes through the film peeling station upward; ③. Screen protector film peeling, after entering the film peeling station, the screen protector film stops forward transmission, Then, the front end of the negative pressure suction 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 it is attached to the surface of the screen protector through negative pressure suction, and then it is tilted upward at an angle equal to the tilt angle of the film peeling station. Then, the release material layer is transmitted forward, and at the same time, the front end of the negative pressure suction head continues to tilt and is synchronously driven upward by the peeling power member moving up and down to gradually peel off the release material layer in dynamic balance (the adsorption force provided by the negative pressure suction head on the screen protector and the peeling force provided by the forward movement of the release material layer on the screen protector are in a balanced state in the upper and lower directions).

[0073] S2. Transfer

[0074] ①. The transfer trolley moves the carrier to the laminating station; ②. The shift unit moves the peeled screen protector film to the top of the laminating station to align the screen protector film with the product screen to be laminated;

[0075] S3, film

[0076] ①. Lower the negative pressure adsorption head, and press down from the front end of the negative pressure adsorption head to align and fit it to the front edge of the screen, wherein the screen protector remains horizontal, and the front edge corresponds to the high end of the curved screen; ②. As the product to be coated moves forward horizontally, the film is coated from the high end to the low end, and the pressure in the head adsorption area is released first, and then the pressure in the body adsorption area is released so that the screen protector gradually separates from the bottom surface of the negative pressure adsorption head. At the same time, the flipping of the angle adjustment component and the lifting and lowering of the peeling power part synchronously drive the negative pressure adsorption head to move, so as to keep the negative pressure adsorption head adaptively attaching the screen protector to the screen surface along the curved trajectory (that is, the downward pressure provided by the negative pressure adsorption head on the screen and the force provided by the transmission line on the screen in the up and down directions are in a balanced state), and at the same time, the coating roller installed on the negative pressure adsorption head maintains a rolling curved surface with the same angle and height change as the negative pressure adsorption head.

[0077] In summary, after adopting the curved screen laminating process, first, the peeling device used forms the unwinding and winding movement of the release material layer based on the release material layer rewinding and unwinding unit, and sends the screen protector film to the peeling station one by one. At the same time, based on the negative pressure adsorption head under angle adjustment, it tilts downward and fully fits the surface of the screen protector film. Then, driven forward by the release material layer, the front end of the negative pressure adsorption head is lifted 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; secondly, based on the shift unit, the peeled film is horizontally moved to the laminating station; finally, based on the transmission line, the product to be coated is transferred to the laminating station, and the negative pressure adsorption head is driven to move the product to the laminating station. The front end is pressed down to align and fit the front edge of the screen, and then it is transmitted forward by the transmission line. Under the decompression or pressure release of the negative pressure adsorption head, the angle adjustment component and the peeling power component synchronously drive the negative pressure adsorption head to move so that the screen protector film keeps synchronous movement and fits with the changes in the screen surface, and the coating roller adapts to the change of the angle of the negative pressure adsorption head to roll the surface of the screen protector film after attachment to complete the coating of the screen protector film. Therefore, when tearing the film, the present invention is based on the design of the inclined film peeling station in the feeding path and adopts the tearing angle and height coordination of the floating negative pressure adsorption head, so that the screen protector film is gradually peeled off the release material layer in dynamic balance, and the release material layer and the holding layer can also be recovered. Continuously supply screen protectors, reduce the difficulty of peeling off, and maintain high-quality tearing film; when applying the film, based on the horizontal forward movement of the product to be coated, the negative pressure adsorption head releases pressure in succession to form a screen protector that remains flat and separates from the adsorption surface, and the screen protector keeps synchronous movement and fits with the curved surface of the screen, and the coating roller adapts to the change of the angle of the negative pressure adsorption head to roll the surface of the screen protector after attachment to meet the coating needs of various screens, especially for curved surface coating, to increase the practicality of coating; thirdly, based on the decomposition of the force formed by the inclined peeling station, and the upward angle is equal to the tilt angle of the peeling station, so that the direction of the resultant force moves along the horizontal direction, and then It is easy to peel off the screen protector without causing the end to curl up, and also reduces the deformation rate of the screen protector or the release material layer, thereby reducing the difficulty of peeling off; fourthly, 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 upper and lower 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; fifthly, the angle formed by the release material layer and the screen protector in the peeling station and the horizontal plane is α, and α≤15°.At this angle, the screen protector is peeled off smoothly and without deviation while maintaining dynamic balance. Generally, 1° to 5° is optimal. The sixth aspect is that the transfer conveyor includes a plurality of conveying rollers located between the unwinder and the reeler, wherein the plurality of conveying rollers are arranged in the up-down and front-back directions to form a conveying layer. The conveying layer includes a feeding section located on the upper layer and a return section located on the lower layer. Based on the arrangement of the feeding section and the return section, the cycle of unwinding, peeling and rewinding of the release material layer can be realized. The seventh aspect is based on the static eliminator to eliminate the static electricity of the screen protector, thereby further improving the quality of the coating. The design based on the height difference is not only convenient for the implementation of static removal, but also more conducive to the layout of inclined peeling in long transmission lines. Film station, at the same time, with the assistance of the height difference, and combined with the transfer head, transfer roller and transmission roller to form a relatively tensioned suspended inclined film peeling station; the eighth aspect is that the power output direction of the peeling power part and the angle adjustment part is the same, based on the same power direction, to avoid the lifting process due to the tilt of the angle power direction causing movement interference, at the same time based on the cooperation of the sliding and rotation of the front end, the above-mentioned power direction is achieved, and it is kept in a triangular distribution during the downward or upward movement to improve the sensitivity and stability of the angle adjustment; the ninth aspect is to implement angle adjustment around the rear end in the up and down directions of the force through the cooperation of sliding and rotation; based on the design of the pivot, so that For implementing rotation adjustment and installation; the tenth aspect is based on the adsorption holes on the bottom surface of the adsorption head mold being long holes extending along the front-to-back direction, and multiple long holes are arranged side by side along the left-to-right direction; the adsorption holes on the bottom surface of the plate-type adsorption mold are in the shape of circular holes and arranged in an array, and at the same time, the area of ​​the long holes is larger than the area of ​​the circular holes, wherein the area of ​​the long holes is at least 5 to 10 times the area of ​​the circular holes. Here, the long holes and circular holes formed on the head provide different adsorption forces, which is not only convenient for tearing operations, but also for subsequent attachment operations; the eleventh aspect is that the shifting unit adopts conventional rails, shifting seats and shifting power devices, wherein the shifting seat is moved laterally along the rails under the push of the shifting power device. Therefore, The peeled screen protector is sent to the film laminating station to implement high-quality film laminating in a flat and non-deflection mode; the twelfth aspect is based on the follow-up rolling of the laminating roller, so that the film can be laminating and rolling at the same angle, and in the process of laminating, the downward pressure provided by the negative pressure adsorption head on the screen and the force formed by the transmission line on the screen in the up and down directions are in a balanced state. In this way, the film is gradually attached to the screen with the driving of the traction power. At the same time, based on the movement of the product and combined with the adaptability angle and pressure adjustment of the screen protector, the film is gradually laminating and rolling in a synchronous movement that adapts to the changes in the screen to achieve high-quality screen lamination (flat and bubble-free).

[0078] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A screen saver film peeling process, characterized in that: It includes the following steps: 1) Film transmission path planning It adopts the method of automatic unwinding, transferring and rewinding to form the path setting of the release material layer, and the transmission path is layered, the upper layer is the feeding path, and the lower layer is the return path, wherein at least a part of the feeding path forms a film peeling station that is forward and downward inclined; 2) Feeding of screen protector film in sequence The screen protector film is unrolled along with the release material layer one by one along the transmission path. As the release material layer is unwinding and rolling, the screen protector film is tilted synchronously with the release material layer and passes through the film peeling station upward. 3) Removing the screen protector After entering the film peeling station, the screen protector film stops being transported forward, and 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 inclination angle of the film peeling station, and then it is adhered to the surface of the screen protector film by negative pressure adsorption, and then the release material layer is transported forward. At the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the up and down moving peeling power part to lift the negative pressure adsorption head upward so that the screen protector film is gradually peeled off from the release material layer in dynamic balance; the power output direction of the peeling power part and the angle adjustment part are the same; the angle adjustment part includes a pivot part located at the rear end of the negative pressure adsorption head and capable of being rotatably connected to the peeling seat, and an adjustment part for rotating the front end of the negative pressure adsorption head and the peeling seat and slidingly connecting them along the front and rear directions, 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 and rear directions.

2. The screen protector film peeling process according to claim 1, characterized in that: When peeling off the screen protection film, the upward tilting angle is equal to the tilting angle of the peeling station.

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

4. The screen protector film peeling process according to claim 1, characterized in that: In step 1), the feeding path has a first segment and a second segment forming a height difference, wherein a static eliminator is provided at the height difference, and the second segment constitutes the film peeling station.

5. The screen protector film peeling process according to claim 1, characterized in that: In step 3), the components of force formed in the upper and lower directions by 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 are in a balanced state.

6. The screen protector film peeling process according to claim 1, characterized in that: In step 3), the adjustment part includes a mounting seat fixed on the negative pressure adsorption head, a slide seat whose lower end is slidably mounted on the mounting seat along the front-to-back direction, and a power rod mounted on the peeling seat and telescopically moving up and down, wherein the lower end of the power rod and the upper end of the slide seat are rotatably connected.

7. The screen protector film peeling process according to claim 1, characterized in that: In step 3), the pivotal portion includes a lifting ear mounted on the negative pressure adsorption head, a hanging edge mounted on the peeling seat and located between the two lifting ears, and a pivot mounted on the hanging edge and rotatably connected to the lifting ears via bearings.

8. The screen protector film peeling process according to claim 1, characterized in that: The negative pressure adsorption head comprises a head adsorption chamber and a body adsorption chamber, wherein the adsorption force formed by the head adsorption chamber is greater than the adsorption force formed by the body adsorption chamber.

9. The screen protector film peeling process according to claim 8, characterized in that: The bottom surface of the negative pressure adsorption head constitutes an adsorption surface, wherein a plurality of adsorption holes are distributed on the adsorption surface, and the adsorption surface is divided into a head adsorption area and a body adsorption area in the front-to-back direction, and the adsorption force of the head adsorption area is greater than that of the body adsorption area.

10. The screen protector film peeling process according to claim 9, characterized in that: The adsorption holes in the head adsorption area 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; and / or, the adsorption holes in the body adsorption area are circular holes and arranged in an array; and / or, the area of ​​the long holes is larger than that of the circular holes, and the area of ​​the long holes is at least 5 to 10 times that of the circular holes.

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