A protective film sticking and tearing device

Abstract

The present invention discloses a protective film sticking and tearing device, comprising: a first feeding assembly, a first transfer assembly, a second feeding assembly, a second transfer assembly, a visual unit and a control box, wherein the first feeding assembly comprises a first material belt unwinding roller and a first conveying channel connecting the first material belt unwinding roller and the first transfer assembly for the first material belt to pass through, the second feeding assembly comprises a second conveying channel for conveying the second material belt, the second conveying channel is located on one side of the first conveying channel, the second transfer assembly is arranged between the first material belt unwinding roller and the first transfer assembly and is erected above the first conveying channel for sticking the sucked protective film on the film product, and the visual unit is used to detect the front end and side of the color strip for positioning the film product. The present invention has at least the following advantages: improving the efficiency of film sticking and packaging the film product and being able to effectively avoid the influence of dust such as fingerprints on the quality of the film product.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic products, and more specifically to a protective film sticking and tearing device. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] The computer screen protector is a rectangular transparent medium, currently mainly made of PET material, which protects the computer screen from scratches, cuts and stains. The computer screen protector is rectangular. At present, during processing, the protective film is generally attached to the base film, and then the material strip is manually pulled out from the unwinding roller and the protective sticker is attached to the protective film on the material strip. Then the protective film on the material strip is manually torn off for stacking. Manual film sticking and tearing is time-consuming, labor-intensive, and inefficient. In addition, manual operation affects the quality of the protective film because human hands have fingerprints and are prone to carry dust.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for applying and tearing off a protective film.

[0006] In order to solve the above technical problems, the present invention provides a protective film sticking and tearing device, which is used to absorb the protective film on the second material belt and stick it to the film product of the first material belt, and then peel off the film product and the first base film, and each film product is provided with longitudinally extending color strips on both sides, including: a first feeding component, a first transfer component, a second feeding component, a second transfer component, a visual unit and a control box installed or supported on a workbench, and the first feeding component, the first transfer component, the second feeding component, the second transfer component and the visual unit are respectively connected to the control box through a signal The first feeding assembly comprises a first material tape unwinding roller and a first conveying channel connecting the first material tape unwinding roller and the first transfer assembly for allowing the first material tape to pass through; the second feeding assembly comprises a second conveying channel for conveying the second material tape, the second conveying channel is located on one side of the first conveying channel shown; the second transfer assembly is arranged between the first material tape unwinding roller and the first transfer assembly and is mounted above the first conveying channel for attaching the absorbed protective film to the film product; the visual unit is used to detect the front end and side edge of the color strip for positioning the film product.

[0007] Furthermore, a membrane product picking station is provided at one end of the first conveying channel close to the first transferring assembly, and the first transferring assembly includes a picking plate which can absorb membrane products at the membrane product picking station and place the absorbed membrane products on a membrane product collecting fixture on one side of the first conveying channel. The first conveying channel is composed of a plurality of relatively arranged limiting plates, and grooves are provided at the lower ends of the relatively side surfaces of each group of limiting plates, and the grooves of the relatively limiting plates surround the first conveying channel.

[0008] Furthermore, the first feeding assembly includes: a first material strip unwinding roller and a first material strip straightening roller installed on the upper side of the workbench, and a first bottom film reversing roller, a first bottom film tensioning roller and a first bottom film receiving roller installed on the lower side of the workbench. The first material strip straightening roller is installed at the entrance of the first conveying channel to straighten the first material strip. A clearance gap for the first bottom film to pass through is provided on the workbench relative to the first bottom film reversing roller.

[0009] Furthermore, it also includes a frame, on which is installed a first driving component for driving the first bottom film receiving roller to rotate, and the first driving component includes a first motor installed on the frame, and a pulley component with one end connected to the output shaft of the first motor and the other end connected to the first bottom film receiving roller.

[0010] Furthermore, the first transfer assembly includes a first mounting frame installed above the first conveying channel, a first hollow housing block installed horizontally on the first mounting frame, a first stepper motor installed at one end of the first hollow housing block, and a first belt transmission assembly driven by the first stepper motor, a first moving block is locked and installed on the first belt transmission assembly, the material picking tray is installed on the first moving block through a first lifting cylinder, a first mounting block is installed on the lifting plate of the first lifting cylinder, the material picking tray is installed on the first mounting block, and a plurality of suction cups for sucking film products are evenly installed on the material picking tray.

[0011] Furthermore, a column is installed on the frame, and the first material belt unloading roller is installed on the column. A driving motor is also provided on the column, and the output shaft of the driving motor is connected to the first material belt unloading roller to drive the first material belt unloading roller to rotate.

[0012] Furthermore, two sides of the first conveying channel are provided with relatively arranged material picking positions and attachment positions, and the second transfer assembly includes a second mounting frame mounted above the first conveying channel, a second hollow accommodating block horizontally mounted on the mounting frame, a second stepping motor mounted at one end of the second hollow accommodating block, and a second belt transmission assembly driven by the second stepping motor to reciprocate, a second moving block is locked and installed on the belt of the second belt transmission assembly, a second lifting cylinder is installed on the second moving block, and a second mounting block is installed on the lifting plate of the second lifting cylinder, and a suction block for sucking the protective sticker at the material picking position and being transferred by the second transfer assembly to the top of the attachment position to stick the sucked protective sticker is installed on the second mounting block. The material picking position is also provided with a U-shaped limit block arranged opposite to the conveying channel for limiting the protective sticker, the material picking position is an area surrounded by the U-shaped limit block, and the suction nozzle size of the suction block is adapted to the area surrounded by the U-shaped limit block.

[0013] Furthermore, the second conveying channel is surrounded by two limiting bars arranged opposite to each other, and slots are provided at the lower ends of the opposite sides of the two limiting bars, and the two slots form a second conveying channel for the second material belt to pass through.

[0014] Furthermore, the second feeding assembly includes a second base film receiving roller, a second material strip unwinding roller and a second base film reversing roller installed on the lower side of the workbench and a second material strip sorting roller located above the workbench, the second material strip sorting roller is installed at the entrance of the conveying channel to sort the second material strip entering the conveying channel, the workbench is provided with a first support block and a second support block, the first support block and two limit bars form the conveying channel, the material taking position is set on the second support block, the second base film reversing roller is arranged between the first support block and the second support block, and there is a gap between the first support block and the second support block for the second base film to pass through.

[0015] Furthermore, the visual unit includes a first visual sensor, a second visual sensor and a third visual sensor. The first visual sensor is arranged on one side of the film product feeding station and is used to detect the front end of each color strip. The second visual sensor is used to detect the first material strip at the first material strip unwinding roller. The third visual sensor is installed on one side of the feeding station to detect the side line of the color strip.

[0016] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] The protective film sticking and tearing device of the present invention can replace the manual packaging of film products. The film products are stacked in a film product collecting fixture by a material picking tray and then packed uniformly, thereby avoiding manual touching of the film products one by one, improving the efficiency of film product packaging and effectively avoiding the influence of dust such as fingerprints on the quality of the film products. By arranging a second transfer component above the film product and arranging a second feeding component to realize the transmission of the second material belt and the peeling of the protective sticker on the second material belt, it can replace the manual application of the protective sticker, greatly improve the work efficiency of applying the protective sticker, and improve the quality of the film product attached with the protective sticker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 The present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0020] Figure 3 The present invention Figure 1 Schematic diagram from another perspective;

[0021] Figure 4 The present invention Figure 3 The enlarged schematic diagram of point B in FIG.

[0022] Figure 5 The present invention Figure 3 Schematic diagram from another perspective;

[0023] Figure 6 is a schematic diagram of a first material strip of the present invention;

[0024] Figure 7 is a schematic diagram of a second material strip of the present invention;

[0025] Figure 8 The present invention Figure 3 Schematic diagram from another perspective.

[0026] in:

[0027] 1. Frame; 2. Workbench; 3. First material belt; 301. Film product; 302. First base film; 303. Color strip; 4. Second material belt; 401. Second base film; 402. Protective sticker; 5. Second transfer assembly; 501. Second mounting frame; 502. Second moving block; 503. Second lifting cylinder; 504. Second mounting block; 505. Second stepping motor; 506. Second hollow containing block; 507. Suction block; 6. First transfer assembly; 601. First mounting frame; 602. First moving block; 603. First lifting cylinder; 604. First mounting block; 605. First stepping motor; 606. First hollow containing block; 607. Material pick-up tray; 608. Suction cup; 7. First feeding assembly; 701. First base film receiving roller; 702. First material belt unwinding roller ;703, the first motor;704, the first bottom film reversing roller;705, the first bottom film tensioning roller;706, the first material belt straightening roller;707, the clearance gap;708, the film product taking station;709, the film product collecting fixture;710, the first conveying channel;711, the limiting plate;8, the second feeding assembly;801, the second bottom film receiving roller;802, the second material belt unwinding roller;803, the second motor;804, the second bottom film reversing roller;805, the second bottom film tensioning roller;806, the second material belt straightening roller;807, the first support block;808, the second support block;809, the limiting strip;810, the second conveying channel;811, the U-shaped limiting block;812, the clearance strip hole;9, the first visual sensor;10, the second visual sensor;11, the third visual sensor;. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] See attached Figure 1-8, a protective film sticking and tearing device described in a preferred embodiment of the present invention specifically includes a first material strip 3 and a second material strip 4, the first material strip 3 includes a first base film 302 and a plurality of rectangular film products 301 evenly attached to the first base film 302, and color strips 303 for cooperating with sensors for positioning are also arranged on both sides of each film product 301, the second material strip 4 includes a second base film 401 and a plurality of protective stickers 402 evenly attached to the second base film, the protective film sticking and tearing device of the present application is used to peel off the film product 301 to which the protective sticker 402 has been attached from the first base film and stack it in a film product collection fixture 709 for batch packaging processing. Specifically: it includes a frame 1 and a workbench 22 arranged on the frame 1, and the film sticking and tearing device of the protective film includes: a first feeding component 7, a first transfer component, a second feeding component, a second transfer component, a visual unit and a control box installed or supported on the workbench 22, the first feeding component, the first transfer component, the second feeding component, the second transfer component and the visual unit are respectively connected to the control box through a signal line, the first feeding component 7 includes a first material belt unwinding roller 702 and a connection between the first material belt unwinding roller 702 and the first transfer component The first conveying channel 710 of the component 6 is used to convey the first material belt, the second feeding component 8 includes a second conveying channel 810 for conveying the second material belt 4, the second conveying channel 810 is located on one side of the first conveying channel 710 shown, the second transfer component 5 is arranged between the first material belt unwinding roller 702 and the first transfer component 6 and is erected above the first conveying channel 710 for attaching the sucked protective sticker 402 to the film product 301, and the visual unit is used to detect the front end and side of the color strip for positioning the film product. The first conveying channel 710 is provided with a film product 301 material picking station at one end close to the first transfer component, and the first transfer component 6 includes a material picking tray 607 that can suck the film product 301 at the film product 301 material picking station and place the sucked film product 301 in the first conveying channel 710. The first conveying channel 710 is composed of a plurality of relatively arranged limiting strips 809, and the lower ends of the relatively opposite sides of each group of limiting strips 809 are provided with notches, and the notches of the relatively opposite limiting strips 809 surround the first conveying channel 710. The first feeding assembly 7 comprises: a first material belt unwinding roller 702 and a first material belt straightening roller 706 installed on the upper side of the workbench 2, and a first bottom film reversing roller 704, a first bottom film tensioning roller 705 and a first bottom film receiving roller 701 installed on the lower side of the workbench 2. The first material belt straightening roller 706 is installed at the entrance of the first conveying channel 710 for straightening the first material belt, and a clearance notch 707 for the first bottom film to pass through is provided on the workbench 2 at a position relative to the first bottom film reversing roller 704.A first driving assembly is installed on the frame 1 to drive the first bottom film receiving roller 701 to rotate. The first driving assembly includes a first motor 703 installed on the frame 1, and a pulley assembly with one end connected to the output shaft of the first motor 703 and the other end connected to the first bottom film receiving roller 701.

[0031] The first transfer assembly 6 includes a first mounting frame 601 mounted above the first conveying channel 710, a first hollow accommodation block 606 horizontally mounted on the first mounting frame 601, a first stepper motor 605 mounted on one end of the first hollow accommodation block 606, and a first belt transmission assembly driven by the first stepper motor 605. A first moving block 602 is fixedly mounted on the first belt transmission assembly, the material taking tray 607 is mounted on the first moving block 602 through a first lifting cylinder 603, a first mounting block 604 is mounted on the lifting plate of the first lifting cylinder 603, the material taking tray 607 is mounted on the first mounting block 604, and a plurality of suction cups 608 for sucking the film product 301 are evenly mounted on the material taking tray 607. A film product 301 collecting jig for stacking the film product 301 is provided on one side of the first conveying channel 710. A column is installed on the frame 1, and the first material belt unloading roller 702 is installed on the column. A driving motor is also provided on the column, and the output shaft of the driving motor is connected to the first material belt unloading roller 702 to drive the first material belt unloading roller 702 to rotate.

[0032] Among them, the second transfer component 5 of the present application is erected above the first conveying channel 710, and a protective sticker 402 picking position and a protective sticker 402 attachment position are also arranged on both sides of the first conveying channel 710. The second transfer component 5 is used to absorb the protective sticker 402 at the picking position and transfer it to the attachment position to attach the protective sticker 402 to the film product 301. The second transfer component 5 includes a suction block 507 for picking up and placing the protective sticker 402. The second material belt is conveyed by the second feeding component 8. The second feeding component 8 includes a second conveying channel 810 for transmitting the second material belt. The second conveying channel 810 is connected to the picking position for conveying the protective sticker 402 to the picking position through the second conveying channel 810.

[0033] Specifically, in order to make the structure more compact and convenient for installation, the second conveying channel 810 of the present application is surrounded by two limit bars 809 arranged opposite to each other, and slots are provided at the lower ends of the opposite sides of the two limit bars 809. The two slots surround the second conveying channel 810 for the second material belt to pass through.

[0034] Among them, the second feeding assembly 8 of the present application includes a second bottom film receiving roller 801, a second material belt unwinding roller 802 and a second bottom film reversing roller 804 installed on the lower side of the workbench 2 and a second material belt sorting roller 806 located above the workbench 2. The second bottom film receiving roller 801 is used to receive the second bottom film. One end of the second bottom film receiving roller 801 is equipped with a second motor 803 for driving the second bottom film receiving roller 801 to rotate. The second material belt unwinding roller 802 is used to unwind the second material belt. Specifically, the second material belt sorting roller 806 is installed at the entrance of the second conveying channel 810 to regularize the second material belt entering the second conveying channel 810. The second material belt sorting roller 806 includes two upper and lower meshing arrangements. The second material belt is regularized by the meshing of the two and the meshing of the two can further provide transmission power for the second material belt. Specifically, after the second material belt comes out from the second material belt unwinding roller 802, it passes through the second material belt sorting roller 806 and then enters the second conveying channel 810. When the second material belt is conveyed to the gap, the second bottom film extends from the gap to the bottom of the workbench 2, and successively bypasses the second bottom film reversing roller 804 and the second bottom film tensioning roller 805 arranged on the lower side of the workbench 2. Then the second bottom film is recovered by the second bottom film receiving roller 801. At the gap, the protective sticker 402 on the second bottom film is peeled off and gradually recovered by the second bottom film, so that the gradually peeled off protective sticker 402 is pushed to the material picking position to wait for the suction block 507 to come and suck the protective sticker 402.

[0035] The workbench 2 is provided with a first support block 807 and a second support block 808. The first support block 807 and two limit bars 809 form the second conveying channel 810. The material picking position is set on the second support block 808. The second bottom film reversing roller 804 is arranged between the first support block 807 and the second support block 808, and there is a gap between the first support block 807 and the second support block 808 for the second bottom film to pass through.

[0036] Furthermore, the second transfer assembly 5 includes a second mounting frame 501 mounted above the conveyor belt of the film product 301, a second hollow housing block 506 installed horizontally on the second mounting frame 501, a second stepper motor 505 installed at one end of the second hollow housing block 506, and a belt transmission assembly driven to and fro by the second stepper motor 505, the belt transmission assembly includes pulleys arranged at both ends of the second hollow housing block 506 and belts wound around the two pulleys, a second moving block 502 is locked and installed on the belt of the belt transmission assembly, the suction block 507 is installed on the second moving block 502 through a second lifting cylinder 503, a second mounting block 504 is installed on the lifting plate of the second lifting cylinder 503, and the suction block 507 is installed on the second mounting block 504.

[0037] Among them, the material picking position of the present application is also equipped with a U-shaped limit block 811 arranged opposite to the second conveying channel 810 for limiting the protective sticker 402. The material picking position is the area surrounded by the U-shaped limit block 811, and the size of the suction nozzle of the suction block 507 is adapted to the area surrounded by the U-shaped limit block 811.

[0038] In order to prevent the suction force of the suction block 507 from being too strong and causing the protective sticker 402 to be deformed by suction, it is preferred that a clearance hole 812 penetrating the second support block 808 is further provided at the material taking position.

[0039] The visual unit includes a first visual sensor 9, a second visual sensor 10 and a third visual sensor 11. The first visual sensor is arranged on one side of the film product picking station and is used to detect the front end of each color strip. The second visual sensor is used to detect the first material strip at the first material strip unwinding roller. The third visual sensor is installed on one side of the picking station and is used to detect the side line of the color strip. Specifically: when the first visual sensor 9 detects the front end of the color strip 303, it will send a signal to the control unit. The control unit calculates how far the first material strip needs to be transported in the direction of the first transplanting component to completely transport the film product 301 where the color strip 303 is located to the film product 301 picking station, and then sends the calculated distance signal to the driver of the first motor 703 that controls the rotation of the first bottom film. The second visual sensor 10 is located at the lower side of the first material belt unloading roller 702 and the feeding port of the first conveying channel 710. The first material belt unloading roller 702 will release a lot of material at a time, so that the second visual sensor 10 can detect the second material belt. When the second visual sensor 10 does not detect the second material belt, it means that there is a shortage of material. The second visual sensor 10 will transmit the shortage of material signal to the control unit. The control unit controls the controller of the driving motor of the first material belt unloading roller 702 to control the driving motor to rotate to discharge the material.

[0040] When the third visual sensor 11 detects a new film product coming over, it detects the side line of the color strip on one side of the film product, and then transmits the distance of the side line to the control unit. The control unit calculates the distance that needs to be moved after the protective sticker at the material picking position is sucked up to reach the attachment position of the film product based on the width of the film product, and then sends the distance that needs to be moved to the second stepper motor.

[0041] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A protective film sticking and tearing device, used to suck the protective film on the second material belt and stick it to the film product of the first material belt, and then peel off the film product and the first base film, each film product is provided with longitudinally extending color strips on both sides, characterized in that: The invention comprises: a first feeding assembly, a first transfer assembly, a second feeding assembly, a second transfer assembly, a visual unit and a control box installed or supported on a workbench; the first feeding assembly, the first transfer assembly, the second feeding assembly, the second transfer assembly and the visual unit are respectively connected to the control box through a signal line; the first feeding assembly comprises a first material belt unwinding roller and a first conveying channel connecting the first material belt unwinding roller and the first transfer assembly for passing the first material belt; the second feeding assembly comprises a second conveying channel for conveying the second material belt; the second conveying channel is located at the first conveying channel shown in FIG. On one side of a conveying channel, the second transfer assembly is arranged between the first material belt unwinding roller and the first transfer assembly and is mounted above the first conveying channel for attaching the sucked protective sticker to the film product, and the visual unit is used to detect the front end and side of the color strip for positioning the film product; a film product picking station is provided at one end of the first conveying channel close to the first transfer assembly, and the first transfer assembly includes a picking tray that can suck the film product at the film product picking station and place the sucked film product on a film product collecting fixture on one side of the first conveying channel, and the first conveying channel is composed of multiple sections arranged relatively The first feeding assembly comprises: a first material belt unwinding roller and a first material belt straightening roller installed on the upper side of the workbench, and a first bottom film reversing roller, a first bottom film tensioning roller and a first bottom film receiving roller installed on the lower side of the workbench, the first material belt straightening roller is installed at the entrance of the first conveying channel for straightening the first material belt, and a clearance gap for the first bottom film to pass through is opened on the workbench relative to the first bottom film reversing roller; the first transfer roller The assembly includes a first mounting frame installed above the first conveying channel, a first hollow accommodating block installed transversely on the first mounting frame, a first stepper motor installed at one end of the first hollow accommodating block, and a first belt transmission assembly driven by the first stepper motor, a first moving block is locked and installed on the first belt transmission assembly, the material picking tray is installed on the first moving block through a first lifting cylinder, a first mounting block is installed on the lifting plate of the first lifting cylinder, the material picking tray is installed on the first mounting block, and a plurality of suction cups for sucking film products are evenly installed on the material picking tray;The two sides of the first conveying channel are provided with a material picking position and an attachment position arranged oppositely, the second transfer assembly includes a second mounting frame mounted above the first conveying channel, a second hollow accommodating block horizontally mounted on the second mounting frame, a second stepping motor mounted at one end of the second hollow accommodating block, and a second belt transmission assembly driven by the second stepping motor to reciprocate, a second moving block is locked and installed on the belt of the second belt transmission assembly, a second lifting cylinder is installed on the second moving block, a second mounting block is installed on the lifting plate of the second lifting cylinder, a suction block is installed on the second mounting block for sucking the protective sticker at the material picking position and being transferred by the second transfer assembly to the attachment position to stick the sucked protective sticker, the material picking position is also provided with a U-shaped limit block arranged opposite to the second conveying channel for limiting the protective sticker, the material picking position is the area surrounded by the U-shaped limit block, and the size of the suction nozzle of the suction block is adapted to the area surrounded by the U-shaped limit block; the second feeding assembly includes a The second bottom film receiving roller, the second material strip unwinding roller, the second bottom film reversing roller and the second material strip tidying roller located above the workbench, the second material strip tidying roller is installed at the entrance of the second conveying channel to regularize the second material strip entering the second conveying channel, the workbench is provided with a first support block and a second support block, the first support block and the two limit bars enclose the second conveying channel, the material taking position is set on the second support block, the second bottom film reversing roller is arranged between the first support block and the second support block, and there is a gap between the first support block and the second support block for the second bottom film to pass through; the visual unit includes a first visual sensor, a second visual sensor and a third visual sensor, the first visual sensor is arranged on one side of the film product taking position and is used to detect the front end of each color strip, the second visual sensor is used to detect the first material strip at the first material strip unwinding roller, and the third visual sensor is installed on one side of the taking position to detect the side line of the color strip. ; 2. The protective film sticking and tearing device according to claim 1, characterized in that: It also includes a frame, on which is installed a first driving assembly that drives the first bottom film receiving roller to rotate, and the first driving assembly includes a first motor installed on the frame, and a pulley assembly with one end connected to the output shaft of the first motor and the other end connected to the first bottom film receiving roller.

3. The protective film sticking and tearing device according to claim 2, characterized in that: A column is installed on the frame, and the first material belt unwinding roller is installed on the column. A driving motor is also provided on the column, and the output shaft of the driving motor is connected to the first material belt unwinding roller to drive the first material belt unwinding roller to rotate.

4. The protective film sticking and tearing device according to claim 1, characterized in that: The second conveying channel is surrounded by two limiting bars arranged opposite to each other, and slots are provided at the lower ends of the opposite sides of the two limiting bars, and the two slots form a second conveying channel for the second material belt to pass through.

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