A curved screen laminating process

Abstract

The present invention discloses a curved screen coating process, wherein the curved screen is concave at both ends and has at least one arc, and the coating process includes a film peeling step, a film transfer step, and a film pasting step. When the present invention is peeling off the film, based on the inclined film peeling station design in the feeding path, and adopting the tearing angle and height coordination of the floating negative pressure adsorption head, the screen protector film is gradually peeled off the release material layer in dynamic balance, and at the same time, the release material layer can be recovered and the screen protector film can be continuously supplied, thereby reducing the peeling difficulty and maintaining high-quality film tearing; when pasting the film, based on the horizontal forward movement of the product to be coated, the negative pressure adsorption head successively releases pressure to form a screen protector film that remains flat and separated from the adsorption surface, and the screen protector film keeps synchronous movement and fits with the arc surface of the screen, and the coating roller is adaptively attached with the change of the angle of the negative pressure adsorption head, and the surface of the screen protector film is rolled to meet the coating needs of various screens, especially for curved coating, to increase the practicality of coating.

Description

Technical Field

[0001] The invention belongs to the technical field of coating, and in particular relates to a coating process for a curved screen. Background Art

[0002] At present, in the production of electronic screens, lamination is an indispensable process, and the lamination process includes peeling off and sticking. Peeling off refers to peeling off the screen protector from the release material layer, and sticking refers to sticking the peeled screen protector on 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 it is necessary to peel off the film, first unroll it and then peel it off. Finally, the peeled screen protector is moved to the film sticking station for sticking.

[0003] However, with the development of electronic screens, curved screens are also widely used in life. Therefore, the current coating has the following technical defects:

[0004] 1) Regardless of whether it is a straight screen or a curved screen, during the 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 screen due to external force; if the screen protector is peeled off simultaneously, the screen protector is easy to bring up the release material layer during 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 another 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 a decrease in the quality of the subsequent film application (such as hollowing, bubbles, etc.);

[0005] 2) In most cases of film pasting, the screen is kept stationary, and the screen saver is attached to the screen surface while the film pasting mechanism is moving. This implementation method is generally suitable for film pasting of flat products. Once the screen is curved (curved screen), the film pasting angle needs to be changed in real time. Therefore, the formed film pasting cannot meet the attachment needs, resulting in insufficient practicality of the film pasting. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved curved screen coating process.

[0007] To achieve the above object, the present invention adopts the following scheme:

[0008] A curved screen coating process, wherein the curved screen is concave at both ends and has at least one arc, and the coating process includes a film peeling step, a film transfer step, and a film sticking step, in particular,

[0009] The film peeling step includes: 1) film layer transmission path planning, which adopts the method of automatic unwinding, transfer, and rewinding to form the path setting of the release material layer, and the path is transmitted and 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 inclined forward and downward; 2) sequential feeding of the screen protector film, which unfolds the screen protector film along 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 remains close to the release material layer. Synchronously tilt and pass through the film peeling station upward; 3) The screen protector film is peeled off. After entering the film peeling station, the screen protector film stops transmitting 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 tilt angle of the film peeling station, and then adhered to the surface of the screen protector film by negative pressure adsorption, and then the release material layer is transmitted forward. At the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the peeling power part moving up and down 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;

[0010] The film transfer step includes: 1) transferring the product to be coated to the laminating station; 2) transferring the peeled screen protector to the top of the laminating station to align the screen protector with the product to be coated;

[0011] The film-sticking steps include: 1) lowering the negative pressure adsorption head, and pressing down from the front end of the negative pressure adsorption head to align and stick to the front edge of the screen, wherein the screen protector film remains in a horizontal state, and the front edge corresponds to the high end of the curved screen; 2) while the product to be coated moves horizontally forward, the film is coated in sequence from the high end to the low end, and the negative pressure adsorption head is depressurized successively, and the screen protector film is gradually separated from the bottom surface of the negative pressure adsorption head by sticking to it, and 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 sticking the screen protector film to the screen surface along the curved trajectory, and at the same time, the film 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.

[0012] According to a specific implementation and preferred aspect of the present invention, when peeling off the screen protector, the upward tilting angle is equal to the tilting angle of the film peeling station, so that the direction of the combined force is along the horizontal direction, thereby facilitating the peeling off of the screen protector.

[0013] 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°~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 of the screen protector or damage to the flatness, thereby improving the lamination quality.

[0014] Preferably, during the peeling process, the components of 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 moving forward to the screen protector film in the up and down directions 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 film is gradually peeled off the release material layer while maintaining dynamic balance, so as to avoid displacement of the screen protector film or damage to its flatness, and improve the lamination quality.

[0015] According to another specific implementation and preferred aspect of the present invention, the negative pressure adsorption head has a head adsorption cavity and a body adsorption cavity, wherein the adsorption force formed by the head adsorption cavity is greater than the adsorption force formed by the body adsorption cavity. Based on the formation of the head, a tearing gap is formed after the head is torn off, and then, the screen protector is gradually separated from the release material layer in a manner of keeping it flat and in contact with the screen protector during movement; at the same time, based on the fact that the adsorption force formed by the head is greater than that of other parts, it is not only convenient for the tearing operation, but also for the subsequent attachment operation.

[0016] Preferably, the negative pressure adsorption head includes an adsorption head mold and a plate-type adsorption mold aligned with the adsorption head mold, wherein the adsorption cavities of the adsorption head mold and the plate-type adsorption mold are not connected to each other, and are arranged in correspondence with the head adsorption area and the body adsorption area. Since the adsorption cavities are not connected, the pressure relief can be performed sequentially, especially during the film coating process, the film coating can be performed by sequential pressure relief to maintain a flatter adhesion to the screen surface.

[0017] In some specific embodiments, 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; the adsorption holes in the body adsorption area are round holes and arranged in an array; further, the area of ​​the long holes is larger than the area of ​​the round holes, and the area of ​​the long holes is at least 5 to 10 times the area of ​​the round holes. During the tearing and attaching process, the forces formed by the different sizes are different, and there is a sequential action, so as to better assist the lamination work.

[0018] Preferably, during film application, the pressure relief of the head adsorption area is first performed, and then the pressure relief of the body adsorption area is performed, so that the screen protector film is gradually separated from the bottom surface of the negative pressure adsorption head for film application. The method of sequential pressure relief is adopted mainly to consider sequential attachment. At the same time, during the process of subsequent film application, the screen protector film is still attached to the bottom surface of the negative pressure adsorption head by unloading the small pressure, thereby achieving the desired smooth film application effect in a more optimized manner.

[0019] 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, motion interference caused by the tilt of the angle power direction during the lifting process is avoided.

[0020] Preferably, the angle adjustment component includes a pivoting 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 and the peeling seat and slidingly connecting them 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 rotating of the front end, the above-mentioned power direction 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.

[0021] In some specific embodiments, the adjustment part includes a mounting seat fixed on the negative pressure adsorption head, a slide seat with a lower end slidably mounted on the mounting seat along the front-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 is rotatably connected to the upper end of the slide seat. Further, the slide seat includes a seat body, 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 rotatably connected via a rotating shaft. That is, by sliding and rotating, the angle adjustment is implemented around the rear end in the vertical direction of the force.

[0022] Preferably, the pivoting part includes a lifting lug mounted on the negative pressure adsorption head, a hanging edge mounted on the peeling seat and located between the two lifting lugs, and a pivot mounted on the hanging edge and rotatably connected to the lifting lugs through bearings. Based on the design of the pivot, in order to facilitate the implementation of rotation adjustment and installation, in this example, the pivot is located at the bottom of the hanging edge, and the hanging edge is vertically arranged with the bottom surface of the peeling seat. At the same time, the peeling power member is a power device composed of a telescopic rod or a power screw.

[0023] According to another specific implementation and preferred aspect of the present invention, a fixed seat is provided at the front end of the negative pressure adsorption head, and the coating roller is rotatably mounted on the fixed seat, and the bottom surface of the coating roller is flush with the bottom surface of the negative pressure adsorption head. This allows the film to be applied and rolled at the same angle. Preferably, during the film application process, the downward pressure provided by the negative pressure adsorption head on the screen and the force formed by the force provided 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 as driven by the traction force.

[0024] In some specific embodiments, the rolling contact part of the laminating roller forms a line contact, and the front contact part of the negative pressure adsorption head is kept in the same plane for rolling. In this way, the laminating is kept on the same surface and arranged front and back, which not only improves the flatness of the laminating, but also allows the two to adapt to different curved surface changes and perform curved surface laminating with the best attachment effect.

[0025] In addition, during the film application process, 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, so as to avoid the screen protector being pulled (deformed) by the up and down forces, and improve the quality of film application.

[0026] Preferably, 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 a film peeling station. The static eliminator is used on the feeding path to eliminate film static electricity, so as to avoid film deformation during film peeling and film application due to static electricity or damage to dynamic balance due to force, so as to achieve high-quality film coating (flatness and no bubbles) on the screen. Specifically, the static eliminator is an static rod.

[0027] Due to the application of the above-mentioned technology and equipment solutions, the present invention has the following advantages compared with the prior art:

[0028] In the existing lamination process, whether it is a straight screen or a curved screen, during the 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 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 (such as: release film); In addition, there is another 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 the deviation is caused, it will directly lead to a decrease in the quality of the subsequent film application (such as: hollowing, bubbles, etc.); In addition, In most cases of film laminating, the screen is kept stationary, and the screen protector is attached to the screen surface while the film laminating mechanism is moving. This implementation method is generally suitable for film laminating of flat products. Once the screen is curved (curved screen), since the film laminating angle needs to be changed in real time, the formed film cannot meet the attachment needs, resulting in insufficient practicality of film laminating. The present invention designs the curved screen laminating process as a whole, cleverly solving the shortcomings of the prior art, and after adopting the curved screen laminating process, firstly, the film peeling adopted forms the unwinding and winding movement of the release material layer based on the release material layer unwinding unit, and the screen protector is sent to the film peeling station one by one, and at the same time, based on the negative pressure adsorption head under angle adjustment, it tilts downward and fully adheres to the surface of the screen protector, and then, the release material layer drives forward. The front end of the negative pressure adsorption head is lifted up and the peeling power piece drives the negative pressure adsorption head to be lifted upward synchronously so that the screen protector film is gradually peeled off the release material layer in dynamic balance; secondly, the peeled film is laterally moved to the laminating station based on the shift unit; finally, the product to be coated is transferred to the laminating station based on the transmission line, and is pressed down from the front end of the negative pressure adsorption head to align and fit on the front edge of the screen, and then, it is transmitted forward by the transmission line, and under the pressure reduction or pressure release of the negative pressure adsorption head, the angle adjustment component and the peeling power piece synchronously drive the negative pressure adsorption head to move so that the screen protector film keeps synchronous movement and fit with the changes of the screen surface, and the laminating roller is adaptively attached with the change of the angle of the negative pressure adsorption head, and the surface of the screen protector film is rolled to complete the lamination of the screen protector film. Therefore, when tearing off 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 at the same time, the release material layer can be recovered and the screen protector film can be continuously supplied, thereby reducing the difficulty of peeling off and maintaining high-quality film tearing; when applying the film, based on the horizontal forward movement of the product to be coated, the negative pressure adsorption head successively releases pressure to form a screen protector film that remains flat and detaches from the adsorption surface, and the screen protector film keeps synchronous movement and adhesion with the change of 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 film after adhesion, so as to meet the coating needs of various screens, especially for curved surface coating, and increase the practicality of coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the film laminating device of the screen saver film of this embodiment;

[0030] Figure 2 for Figure 1 A schematic diagram of the main view;

[0031] Figure 3 for Figure 2 Schematic diagram of top view;

[0032] Figure 4 for Figure 1 A schematic diagram of the structure of the middle film peeling device;

[0033] Figure 5 for Figure 4 A schematic diagram of the main view;

[0034] Figure 6 for Figure 5 Schematic diagram of top view;

[0035] Figure 7 for Figure 4 A schematic diagram of the structure of the middle release material layer reeling and unreeling unit;

[0036] Figure 8 for Figure 7 A schematic diagram of the main view;

[0037] Fig. 9 for Figure 8 Schematic diagram of top view;

[0038] Fig.10 for Figure 4 A schematic diagram of the structure of the middle screen protection film peeling unit;

[0039] Fig.11 for Fig.10 The main view diagram in FIG.

[0040] Fig.12 for Fig.11 A schematic diagram of the structure of a medium negative pressure adsorption head;

[0041] Fig.13 for Fig.11 Schematic diagram from top view;

[0042] Fig.14 for Figure 1 A schematic diagram of the structure of the film coating device;

[0043] Fig.15 for Fig.14 A schematic diagram of the main view;

[0044] Fig.16 for Fig.15 Schematic diagram of a top view;

[0045] Wherein: J, film peeling device; 1, release material layer winding and unwinding unit; 10, unwinder; 11, winder; 12, transfer transmission; 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 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;

[0046] F, laminating device; 3, transmission line; 30, transmission rail; 31, transfer trolley; 32, carrier; 4, shifting unit; 40, track; 41, shifting seat; 42, shifting power device; 5, laminating roller; 6, fixed seat;

[0047] m, screen protector film; n, release material layer; E, car screen. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of 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 violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0049] 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 referred device or element 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.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central 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 a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0053] 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, wherein after the film is peeled off by the film peeling device J, the laminating device F performs film application, wherein the curved screen is a vehicle-mounted screen E.

[0054] Specifically, the screen saver film m is pasted on the release material layer n at intervals and is rolled up with the release material layer n. The film peeling device J is used to peel off the screen saver film m from the unrolled release material layer n, and the laminating device F is used to attach the screen saver film m to the screen.

[0055] Combination Figures 4 to 6As 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.

[0056] Specifically, the screen protection film m is attached to the release material layer n at intervals and is wound with the release material layer n to form a roll, wherein the release material layer n is a thin film layer.

[0057] 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 rewinded by the rewinder 11 .

[0058] Combination Figures 7 to 10 As shown, the unwinder 10 and the rewinder 11 are installed on the same frame, and the film unwinded from the unwinder 10 is transported forward, and the transport path forms a transport layer s under the transfer of the transfer conveyor 12, that is, the transport layer s includes a feed section s1 located at the upper layer and a return section s2 located at the lower layer, wherein 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 realized.

[0059] 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 reel 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.

[0060] In this example, the feeding section s1 includes a first section s11 and a second section s12 with a height difference formed by a static eliminator 13, wherein the second section s12 constitutes a film peeling station. Here, the static electricity of the screen saver film is eliminated based on the static eliminator, and the quality of the film is further improved; the design based on the height difference. It is not only convenient for the implementation of static electricity removal, but also more conducive to the layout of inclined film peeling stations in long transmission lines. Further, the static eliminator is an electrostatic rod.

[0061] The transfer conveyor 12 also includes a transfer head 121 and a transfer roller 122 disposed at the static eliminator 13. Two transfer rollers 120 are arranged in an aligned manner at the front end of the second segment s12, wherein 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 aid of the height difference, a relatively tensioned suspended inclined film peeling station is formed in combination with the transfer head 121, the transfer roller 122 and the transfer roller 120. That is, a film peeling station that is inclined from top to bottom along the forward transmission direction is formed in the transfer path, and the screen protector film m is kept tilted synchronously with the release material layer n and passes through the film peeling station upward. In this example, the transfer roller 120, the transfer head 121 and the transfer roller 122 are all assembled using a transfer frame 123.

[0062] 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°~5° is the best. At this angle, the screen protector is peeled off smoothly and without deviation while maintaining dynamic balance.

[0063] Combination Figures 11 to 13 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.

[0064] 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 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.

[0065] 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 movement interference caused by the tilt of the angle power direction during the lifting process is avoided. 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.

[0066] In some specific embodiments, the pivoting portion 220 includes a lifting lug d mounted on the negative pressure adsorption head 21, a hanging edge e mounted on the peeling seat 20 and between the two lifting lugs d, and a pivot f mounted on the hanging edge e and rotatably connected to the lifting lugs through bearings. Based on the design of the pivot, in order to facilitate the implementation of 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 sliding seat 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 telescopically moving up and down, wherein 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, a seat frame rod b2 fixedly mounted on the seat body b1, wherein 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 sliding and rotating cooperation, the angle adjustment is implemented around the rear end in the up and down directions of the force.

[0067] In some specific implementations, 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 a cylinder.

[0068] Combination Figures 14 to 16 As shown, the laminating device F includes a transmission line 3 located at the opposite side of the film peeling station and corresponding to the laminating station, a shift unit 4 driving 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 on 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 member 23 synchronously drive the negative pressure adsorption head 21 to move so that the screen saver film m keeps synchronous movement and fit with the changes in the screen surface, and the laminating roller 5 adaptively follows the angle change of the negative pressure adsorption head 21 to roll the surface of the screen saver film after attachment.

[0069] In this example, a fixing seat 6 is provided at the front end of the negative pressure adsorption head 21, and the film coating roller 5 is rotatably mounted on the fixing seat 6, and the bottom surface of the film coating roller 5 is flush with the bottom surface of the negative pressure adsorption head 21. This allows the film to be applied and rolled at the same angle. During the film application process, the downward pressure provided by the negative pressure adsorption head 21 on the screen and the force formed by the force provided by the transmission line 3 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 force.

[0070] In some specific embodiments, the transmission line 3 includes a transmission rail 30 extending horizontally along the front-back direction, a transfer trolley 31 running on the transmission rail 30, and a carrier 32 mounted on the transfer trolley 31, wherein the product is mounted on the carrier 32 with the screen facing upward. In short, based on the movement of the product and combined with the adaptation angle and pressure adjustment of the screen protector film, the film is applied and rolled step by step and synchronously adapted to the changes of the screen, so as to achieve high-quality film coating (flat, without bubbles) on the screen.

[0071] 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.

[0072] In summary, the implementation process of this embodiment is as follows:

[0073] S1. Peel off the film

[0074] ①. Film layer transmission path planning, which adopts automatic unwinding, transfer and rewinding to form the path setting of the release material layer, and the path is transmitted and layered, the upper layer is the feeding path, the lower layer is the return path, wherein at least a part of the feeding path forms a film peeling station that tilts forward and downward; ②. Sequential feeding of screen protector film, which unfolds the screen protector film along with the release material layer one by one through the transmission path, and in the unwinding and rewinding movement of the release material layer, the screen protector film keeps tilting synchronously with the release material layer and passes through the film peeling station upward; ③. The peeling of the screen protector film, after entering the film peeling station, the screen protector film stops transmitting forward, 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 screen protector film is attached to the surface through negative pressure adsorption, and then the angle of upward tilt is equal to the tilt angle of the film peeling station, and then the release material layer is transmitted forward, and at the same time, the front end of the negative pressure adsorption head continues to tilt and is 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 the release material layer in dynamic balance (the adsorption force provided by the negative pressure adsorption head on the screen protector film and the peeling force provided by the forward movement of the release material layer on the screen protector film are in a balanced state in the up-and-down directions);

[0075] S2. Transfer

[0076] ①. The transfer trolley moves the carrier to the laminating station; ②. The shift unit moves the peeled screen protector to the top of the laminating station to align the screen protector with the product screen to be laminated;

[0077] S3, film

[0078] 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 film remains horizontal, and the front edge corresponds to the high end of the curved screen; ②. When the product to be coated moves forward horizontally, the film is coated from the high end to the low end in sequence, and the pressure is released in the head adsorption area first, and then in the body adsorption area, so that the screen protector film 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 film 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.

[0079] In summary, after adopting the curved screen laminating process, firstly, the film peeling adopted forms the unwinding and winding movement of the release material layer based on the release material layer rewinding and unwinding unit, and the screen protector film is sent to the film peeling station one by one. At the same time, based on the negative pressure adsorption head under the 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 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; secondly, based on the shifting 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 be coated. The front end is pressed down to align and fit to 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 adaptively follows the angle change 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 inclined film peeling station design 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 material layer can also be recovered at the same time. The screen protector film is continuously supplied to reduce the difficulty of peeling off and maintain high-quality film tearing; when the film is applied, 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 film that remains flat and detaches from the adsorption surface, and the screen protector film keeps synchronous movement and adhesion 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 film after attachment to meet the coating needs of various screens, especially for curved surface coating, to increase the practicality of coating; the third aspect is based on the decomposition of the force formed by the inclined film peeling station, and the upward angle is equal to the tilt angle of the film peeling station, so that the direction of the combined 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 the deformation rate of the screen protector or the release material layer is reduced, thereby reducing the difficulty of peeling off; fourthly, during the peeling process, the components of force formed 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 in the upper and lower directions 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 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, thereby improving 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 film is peeled off smoothly and without deviation while maintaining dynamic balance. Generally, 1°~5° is optimal. On the sixth aspect, the transfer conveyor includes a plurality of conveying rollers between the unwinder and the reel, wherein the plurality of conveying rollers are arranged in the up-down and front-to-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. On the seventh aspect, the static electricity of the screen protector film is eliminated by the static eliminator to further improve the quality of the coating. The design based on the height difference is not only convenient for the implementation of static electricity removal, but also more conducive to the layout of inclined peeling in a long transmission line. The film peeling station, with the assistance of the height difference, combines 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 directions of the peeling power member and the angle adjustment member are the same. Based on the same power direction, the movement interference caused by the tilt of the angle power direction during the lifting process is avoided. 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 upward and downward directions of the force through sliding and rotating coordination; 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 elongated holes extending in the front-to-back direction, and a plurality of elongated holes being arranged side by side in 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 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, and here, based on the elongated holes and circular holes formed on the head providing different adsorption forces, it is not only convenient for tearing operations, but also for subsequent attachment operations; the eleventh aspect, the shifting unit adopts conventional tracks, shifting seats and shifting power devices, wherein the shifting seats are laterally shifted along the tracks under the push of the shifting power devices, therefore, the base In order to deliver the peeled screen protector to the film laminating station, high-quality film laminating is implemented in a flat and non-deflected mode; in the twelfth aspect, based on the follow-up rolling of the laminating roller, the film is 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 driven by the traction force. 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 and synchronously adapted to the changes in the screen. The gradual film lamination and rolling are carried out to achieve high-quality screen lamination (flat and bubble-free).

[0080] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A curved screen coating process, wherein the curved screen is concave at both ends and has at least one arc, and the coating process includes a film peeling step, a film transfer step, and a film sticking step, characterized in that: The film peeling step includes: 1) film layer transmission path planning, which adopts automatic unwinding, transfer, and rewinding to form a path setting for the release material layer, and the path is transmitted and 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 inclined forward and downward; 2) sequential feeding of the screen protector film, which unfolds the screen protector film along 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 synchronously tilted with the release material layer and moves upward. 3) The peeling of the screen protector film. After entering the peeling station, the screen protector film stops transmitting forward, and then the front end of the negative pressure adsorption head of the peeling station is pressed down and adjusted to be consistent with the tilt angle of the peeling station, and then adheres to the surface of the screen protector film by negative pressure adsorption, and then the release material layer is transmitted forward. At the same time, the front end of the negative pressure adsorption head is tilted and synchronously driven by the peeling power piece moving up and down 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; the power output direction of the peeling power piece and the angle adjustment component the same direction; the angle adjustment component includes a pivot part located at the rear end of the negative pressure adsorption head and capable of being rotatably connected with the peeling seat, and an adjustment part for rotating the front end of the negative pressure adsorption head with the peeling seat and slidingly connecting 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; 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-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 is rotatably connected with the upper end of the sliding seat; the pivot part 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 with the lifting ears through bearings respectively; the film transfer step includes: 1) transferring the product to be coated to the coating station; 2) transferring the peeled screen protector to the top of the coating station to realize the screen alignment of the screen protector and the product to be coated; The film-sticking step includes: 1) lowering the negative pressure adsorption head, and pressing down from the front end of the negative pressure adsorption head to align and stick to the front edge of the screen, wherein the screen protector film remains in a horizontal state, and the front edge corresponds to the high end of the curved screen; 2) while the product to be coated moves horizontally forward, coating is performed from the high end to the low end in sequence, and the negative pressure adsorption head is depressurized successively, and the screen protector film is gradually separated from the bottom surface of the negative pressure adsorption head by sticking to it, and 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 sticking the screen protector film to the screen surface along the curved trajectory, and at the same time, the film 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.

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

3. The curved screen coating 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 curved screen coating process according to claim 1, characterized in that: During the peeling process, 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.

5. The curved screen coating 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.

6. The curved screen coating process according to claim 5, 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.

7. The curved screen coating process according to claim 6, characterized in that: During film application, 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 film is gradually separated from the bottom surface of the negative pressure adsorption head for film application.

8. The curved screen coating process according to claim 7, characterized in that: The adsorption holes in the head adsorption area are long holes extending along the front-to-back direction, and a plurality of the long holes are arranged side by side along the left-to-right direction.

9. The curved screen coating process according to claim 8, characterized in that: The adsorption holes in the main adsorption area are in the shape of circular holes and arranged in an array.

10. The curved screen coating process according to claim 9, 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.

11. The curved screen coating process according to claim 1, 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.

12. The curved screen coating process according to claim 1, characterized in that: A fixing seat is provided at the front end of the negative pressure adsorption head, the coating roller is rotatably mounted on the fixing seat, and the bottom surface of the coating roller is flush with the bottom surface of the negative pressure adsorption head.

13. The curved screen coating process according to claim 1 or 12, characterized in that: The rolling contact portion of the coating roller forms a line contact and is kept in the same plane as the front end contact portion of the negative pressure adsorption head for rolling.

14. The curved screen coating process according to claim 1, characterized in that: During the film application process, the downward pressure provided by the negative pressure adsorption head on the screen and the force formed by the force provided by the transmission line on the screen in the up and down directions are in a balanced state.

15. The curved screen coating process according to claim 1, characterized in that: The feeding path has a first section and a second section forming a height difference, wherein a static eliminator is provided at the height difference, and the second section constitutes the film peeling station.

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