Automatic winding device for release film

Abstract

The present invention relates to the technical field of release film, and specifically discloses an automatic winding device for release film, comprising: a fixing frame; further comprising: a tensioning roller, which is arranged at the front end of the fixing frame, and is used to adjust the winding tension of the release film; a flip plate, which is arranged at one side of the fixing frame, and is used to automatically flip according to the winding progress of the release film; after the device is started, the fixing component will immediately press the release film, so that one end of the release film is fixed to the winding roller, and at the same time, an air pump absorbs the release film to prevent the release film from being demolded, and at the same time, according to the different left and right tensions of the release film sensed by multiple pressure sensors, the corresponding air nozzle will further tighten the absorbed release film under the action of the air pump to balance the tension of the release film, thereby avoiding large-area scratches on the surface of the release film during the replacement process, and the situation that the surface of the release film is wrinkled due to unequal left and right pressures when pressing the film when replacing a new winding roller.

Description

Technical Field

[0001] The invention relates to the technical field of release films, in particular to an automatic winding device for release films. Background Art

[0002] Release film refers to a film with distinguishable surface. When the release film comes into contact with a specific material under limited conditions, it is non-sticky or slightly sticky. After production, the release film will be pulled into the reel and the reel structure will reel the release film for storage.

[0003] However, the surface of the release film is smooth and the material is thin. When the new axis is replaced during the film rolling process, due to the different left and right pressures of the clamping mold, it is very likely that the surface of the pressed release film will wrinkle, affecting the subsequent film rolling. For this reason, we propose an automatic film rolling device. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic release film winding device to solve the problem mentioned in the background technology that due to the different left and right pressures of the clamping die, the surface of the pressed release film is likely to wrinkle, thus affecting the subsequent film winding.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic winding device for a release film, comprising: a fixing frame;

[0006] Also includes:

[0007] A tensioning roller, which is arranged at the front end of the fixed frame and is used to adjust the winding tension of the release film;

[0008] A turning plate, which is arranged on one side of the fixing frame and is used to automatically turn over according to the winding progress of the release film, and a first motor is installed at the rear end of the turning plate;

[0009] Winding roller, two winding rollers are provided, a second motor is installed at the rear end of the winding roller, the two winding rollers are arranged on one side of the flip plate, the winding roller is used to wind up the release film, a pressure groove is opened on the outer wall of the winding roller, a pressure roller is arranged inside the pressure groove, a gap is arranged between the pressure roller and the pressure groove, the cross-sectional shape of the pressure roller is set to be arc-shaped, a plurality of pressure sensors are arranged at equal intervals on one side of the pressure groove, a plurality of air nozzles are arranged at equal intervals on the other side of the pressure groove, the positions of the plurality of pressure sensors correspond to the positions of the air nozzles, and an air pump is installed between the plurality of air nozzles;

[0010] A fixing component, which is arranged at one end of the winding roller and can be used to fix the release film;

[0011] There are two friction rollers, which are respectively arranged on one side of the two winding rollers. The friction rollers can accurately adjust the tension of the release film and evenly wind it up.

[0012] Among them, two clamping rollers are arranged at the front end of the fixed frame, a gap is arranged between the two clamping rollers, and connecting gears are fixedly connected at both ends of the two clamping rollers, and the two connecting gears are meshedly connected.

[0013] Wherein, sliders are arranged at both ends of the tensioning roller, the shape of the sliders is set to be "T" shape, the sliders are slidably connected to the fixing frame, and tensioning springs are arranged at the top ends of the two sliders.

[0014] Among them, the flip plate is fixedly connected to the winding roller, the rear end of the flip plate is fixedly connected to the first motor, the upper and lower sides of the flip plate are provided with fixed rollers, the outer wall of the fixed roller is provided with a groove, and the inside of the groove is provided with an electric fusion tube.

[0015] Among them, the left and right ends of the electric fusion pipe are fixedly connected with connecting blocks, the bottom ends of the connecting blocks are fixedly connected with toothed belts, the internal transmission of the toothed belts is connected with two transmission gears, the end of one of the transmission gears is fixedly connected with a transmission rod, and one end of the transmission rod is fixedly connected with a stepping motor.

[0016] Among them, the fixing component includes a limiting tube, the end of the limiting tube is connected to the flip plate through a bearing, the internal rotation of the limiting tube is connected to an adjustment plate, the outer wall of the adjustment plate is provided with an adjustment groove, the adjustment groove is inclined, the internal sliding connection of the adjustment groove is connected to an adjustment block, the top of the adjustment block is connected to a positioning plate, the outer wall of the adjustment plate is fixedly connected to a limiting gear ring, the side of the limiting gear ring is meshingly connected to a limiting gear, and a servo motor is installed at the end of the limiting gear.

[0017] The positioning plate passes through the pressing roller, the shape of the pressing roller matches the shape of the pressing groove, a positioning screw passes through the top of the pressing roller, and the positioning screw is threadedly connected with the positioning plate.

[0018] Among them, L-shaped connecting plates are arranged at both ends of the friction roller, the L-shaped connecting plates are movably connected to the friction roller, the friction roller is attached to the winding roller, the rear end of the L-shaped connecting plates is fixedly connected to the fixing plates, and the rear end of the fixing plates is provided with a positioning component.

[0019] Among them, the positioning assembly includes a positioning plate, an outer wall of the positioning plate is provided with a movable groove, the internal size of the movable groove is consistent with the external size of the fixed plate, the internal rotation connection of the positioning plate is connected with the movable plate, the movable plate is fixedly connected with the fixed plate, the rear end of the movable plate is fixedly connected with a movable rod, the end of the movable rod is movably connected with a telescopic rod, a positioning tube passes through the rear end of the telescopic rod, the telescopic rod is slidably connected with the positioning tube, a buffer spring is arranged inside the positioning tube, and the positioning tube is movably connected with the positioning plate.

[0020] The sum of the lengths of the positioning disc and the fixing plate is equal to the distance between the positioning disc and the winding roller, and a laser sensor is arranged on the rear side of the fixing plate.

[0021] The present invention has at least the following beneficial effects:

[0022] After the device is started, the fixing component will immediately press the release film to fix one end of the release film to the winding roller, and the air pump will absorb the release film to prevent the release film from being demolded. At the same time, the left and right tensions of the release film can be sensed by multiple pressure sensors. When the tensions are different, the corresponding air nozzle will further tighten the absorbed release film under the action of the air pump to balance the tension of the release film, thereby avoiding large-area scratches on the surface of the release film during the replacement process, and wrinkles on the surface of the release film due to unequal left and right pressures when pressing the film when replacing a new winding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a front view structural schematic diagram of the present invention;

[0025] Figure 3 It is a side view structural schematic diagram of the present invention;

[0026] Figure 4 It is a schematic diagram of the tension roller structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the connection structure between the toothed belt and the transmission gear of the present invention;

[0028] Figure 6 It is a schematic diagram of the connection structure between the transmission gear and the transmission rod of the present invention;

[0029] Figure 7 This is a schematic diagram of the fixed roller structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the cutaway structure of the limit tube of the present invention;

[0031] Fig. 9 This is a schematic diagram of the structure of the adjustment plate of the present invention;

[0032] Fig.10 This is a schematic diagram of the positioning screw structure of the present invention;

[0033] Fig.11 This is a schematic diagram of the cross-section structure of the winding roller of the present invention;

[0034] Fig.12 This is a schematic diagram of the structure of the positioning component of the present invention;

[0035] Fig.13 It is a schematic diagram of the connection structure between the movable disk and the movable rod of the present invention.

[0036] In the figure: 001, fixed frame; 002, tension roller; 003, turning plate; 004, winding roller; 005, fixing assembly; 006, friction roller; 007, positioning assembly; 110, tightening roller; 120, connecting gear; 210, slider; 220, tension spring; 310, first motor; 320, fixed roller; 330, groove; 340, electric melting pipe; 341, connecting block; 342, toothed belt; 343, transmission gear; 344, transmission rod; 345, stepping motor; 410, second motor; 420, pressing groove; 430 , pressure roller; 440, pressure sensor; 450, air nozzle; 460, air pump; 470, positioning screw; 501, limiting tube; 502, adjusting plate; 503, adjusting slot; 504, adjusting block; 505, positioning plate; 506, limiting gear ring; 507, limiting gear; 508, servo motor; 610, L-shaped connecting plate; 620, fixing plate; 701, positioning plate; 702, movable slot; 703, movable plate; 704, movable rod; 705, telescopic rod; 706, positioning tube; 707, buffer spring; 710, laser sensor. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figures 1 to 13 , the present invention provides the following technical solutions:

[0039] Embodiment 1: A release film automatic winding device, comprising: a fixing frame 001; and further comprising:

[0040] A tensioning roller 002, which is disposed at the front end of the fixed frame 001 and is used to adjust the winding tension of the release film;

[0041] The flip plate 003 is arranged on one side of the fixed frame 001. The flip plate 003 is used to automatically flip according to the winding progress of the release film. The rear end of the flip plate 003 is installed with a first motor 310;

[0042] Winding roller 004, two winding rollers 004 are provided, a second motor 410 is installed at the rear end of the winding roller 004, the two winding rollers 004 are arranged on one side of the flip plate 003, the winding roller 004 is used to wind up the release film, a pressing groove 420 is opened on the outer wall of the winding roller 004, a pressing roller 430 is arranged inside the pressing groove 420, a gap is arranged between the pressing roller 430 and the pressing groove 420, the cross-sectional shape of the pressing roller 430 is arranged in an arc shape, a plurality of pressure sensors 440 are arranged at equal intervals on one side of the pressing groove 420, a plurality of air nozzles 450 are arranged at equal intervals on the other side of the pressing groove 420, the positions of the plurality of pressure sensors 440 correspond to the positions of the air nozzles 450, and an air pump 460 is installed between the plurality of air nozzles 450;

[0043] A fixing component 005, which is disposed at one end of the winding roller 004 and can be used to fix the release film;

[0044] Friction roller 006: two friction rollers 006 are provided, and the two friction rollers 006 are respectively provided on one side of the two winding rollers 004. The friction roller 006 can accurately adjust the tension of the release film and evenly wind it.

[0045] Among them, the staff passes the release film around the tensioning roller 002 and the winding roller 004 on the front side of the flip plate 003, and places the release film on the winding roller 004 on the rear side of the flip plate 003. After starting the device, the pressure roller 430 presses one end of the release film, and the air pump 460 sucks the release film and pulls the release film to prevent the release film from being demolded and to avoid wrinkles when pressing the release film. At the same time, according to the different pressures of the release film sensed by multiple pressure sensors 440, the corresponding air nozzle 450 will further tighten the sucked release film under the action of the air pump 460 to balance the tension of the release film.

[0046] At the same time, two clamping rollers 110 are arranged at the front end of the fixed frame 001, a gap is arranged between the two clamping rollers 110, and connecting gears 120 are fixedly connected to both ends of the two clamping rollers 110, and the two connecting gears 120 are meshedly connected.

[0047] The two meshing connecting gears 120 cause the two clamping rollers 110 to rotate synchronously in opposite directions, and the release film passes between the two clamping rollers 110 to tighten the release film, so that the release mold can move forward at a uniform speed.

[0048] Slide blocks 210 are provided at both ends of the tensioning roller 002 . The shape of the slide blocks 210 is set to be “T”-shaped. The slide blocks 210 are slidably connected to the fixing frame 001 . Tension springs 220 are provided at the top ends of the two slide blocks 210 .

[0049] Among them, the setting of the tensioning roller 002 can keep the release film in an appropriate tension state. The appropriate tension state can improve the transmission efficiency and reduce energy loss. At the same time, it can ensure that the release film is flatly and tightly wound on the winding roller 004 to avoid problems such as wrinkles, misalignment or axial slippage.

[0050] The flip plate 003 is fixedly connected to the winding roller 004, and the rear end of the flip plate 003 is fixedly connected to the first motor 310. Fixed rollers 320 are arranged on the upper and lower sides of the flip plate 003. The outer wall of the fixed roller 320 is provided with a groove 330, and an electric fusion tube 340 is arranged inside the groove 330.

[0051] The left and right ends of the electric fusion tube 340 are fixedly connected with connecting blocks 341, the bottom ends of the connecting blocks 341 are fixedly connected with toothed belts 342, the internal transmission of the toothed belts 342 is connected with two transmission gears 343, the end of one of the transmission gears 343 is fixedly connected with a transmission rod 344, and one end of the transmission rod 344 is fixedly connected with a stepping motor 345.

[0052] Among them, the stepper motor 345 drives the transmission gear 343 on its bottom side to rotate. When the transmission gear 343 rotates, it can drive the toothed belt 342 to rotate synchronously. At the same time, the connecting block 341 connects the toothed belt 342 and the electric melting tube 340, so that the toothed belt 342 can send the electric melting tube 340 out of the fixed roller 320 during operation. When the electric melting tube 340 starts, the electric melting tube 340 releases heat, and the connection between the electric melting tube 340 and the release mold can be quickly disconnected, so that the release film can be cleanly disconnected. After the release mold is disconnected, the stepper motor 345 drives the electric melting tube 340 to descend, so that the electric melting tube 340 is retracted into the fixed roller 320 to prevent the electric melting tube 340 from affecting the intact release film.

[0053] The fixing component 005 includes a limiting tube 501, the end of the limiting tube 501 is connected to the flip plate 003 through a bearing, the internal rotation of the limiting tube 501 is connected to an adjusting plate 502, the outer wall of the adjusting plate 502 is provided with an adjusting groove 503, the adjusting groove 503 is inclined, the internal sliding connection of the adjusting groove 503 is connected to an adjusting block 504, the top of the adjusting block 504 is connected to a positioning plate 505, the outer wall of the adjusting plate 502 is fixedly connected to a limiting gear ring 506, the side of the limiting gear ring 506 is meshingly connected to a limiting gear 507, and a servo motor 508 is installed at the end of the limiting gear 507.

[0054] Among them, the servo motor 508 drives the limit gear 507 to rotate, and the limit gear 507 is meshed and connected with the limit gear ring 506. The limit gear ring 506 rotates under the transmission of the limit gear 507. When the limit gear ring 506 rotates, the adjustment groove 503 rotates following the rotation direction. When the adjustment groove 503 moves, the adjustment block 504 slidingly connected to the adjustment groove 503 gradually rises along the adjustment groove 503, so that the adjustment block 504 can be synchronously lifted and lowered with the pressure roller 430 connected thereto, so as to facilitate the reel changing and rewinding according to the rewinding device, and to press or release the release film.

[0055] The positioning plate 505 passes through the pressing roller 430 . The shape of the pressing roller 430 matches the shape of the pressing groove 420 . A positioning screw 470 passes through the top of the pressing roller 430 . The positioning screw 470 is threadedly connected to the positioning plate 505 .

[0056] When the staff replaces the new winding roller 004, the threaded connection between the positioning screw 470 and the pressure roller 430 and the positioning plate 505 can be cancelled, so that the release film passes through between the pressure roller 430 and the winding roller 004, so that when the new winding roller 004 is replaced, the pressure roller 430 can immediately press the release film to achieve winding.

[0057] L-shaped connecting plates 610 are provided at both ends of the friction roller 006. The L-shaped connecting plates 610 are movably connected to the friction roller 006. The friction roller 006 is attached to the winding roller 004. The rear end of the L-shaped connecting plate 610 is fixedly connected to a fixing plate 620. The rear end of the fixing plate 620 is provided with a positioning component 007.

[0058] Embodiment 2: In this embodiment 2, other structures remain unchanged. The difference from embodiment 1 is that the positioning assembly 007 includes a positioning plate 701. The outer wall of the positioning plate 701 is provided with a movable groove 702. The internal dimensions of the movable groove 702 coincide with the external dimensions of the fixed plate 620. The interior of the positioning plate 701 is rotatably connected with a movable plate 703. The movable plate 703 is fixedly connected to the fixed plate 620. The rear end of the movable plate 703 is fixedly connected with a movable rod 704. The end of the movable rod 704 is movably connected with a telescopic rod 705. A positioning tube 706 runs through the rear end of the telescopic rod 705. The telescopic rod 705 is slidably connected to the positioning tube 706. A buffer spring 707 is provided inside the positioning tube 706. The positioning tube 706 is movably connected to the positioning plate 701.

[0059] The sum of the lengths of the positioning plate 701 and the fixing plate 620 is equal to the distance between the positioning plate 701 and the winding roller 004 . A laser sensor 710 is disposed at the rear side of the fixing plate 620 .

[0060] Among them, the second motor 410 drives the winding roller 004 to rotate, and the winding roller 004 is wound when it rotates. At the same time, the friction roller 006 is in contact with the release film to ensure that the release film is closely fitted during the winding process, reduce looseness and sliding, reduce material waste, and improve product quality. During the winding process, the release film wound by the winding roller 004 is in a cylindrical shape, and the diameter is constantly getting longer. With the increasing diameter of the release film, the friction roller 006 that is in contact with the release film is also constantly moving backwards, so that the telescopic rod 705 will slide inside the positioning tube 706, and The buffer spring 707 continuously applies a downward force to the telescopic rod 705 until it reaches the critical point of the buffer spring 707, and the buffer spring 707 drives the positioning tube 706 to rotate in the direction of the new winding roller 004 that is not being wound. Since the telescopic rod 705 and the movable rod 704 inside the positioning tube 706 are movably connected to each other, the movable rod 704, the positioning plate 701 and the fixed plate 620 can quickly rotate in the direction of the new winding roller 004 under the potential energy of the buffer spring 707, and the friction roller 006 also comes close to the new winding roller 004.

[0061] At the same time, when the fixed plate 620 rotates in the direction of the new winding roller 004, the laser sensor 710 will sense the movement of the fixed plate 620, indicating that the winding roller 004 that is in the process of winding has completed winding, so that the laser sensor 710 will immediately cut off the power of the second motor 410 at the end of the winding roller 004 that has completed winding, and the first motor 310 and the servo motor 508 are energized. The first motor 310 drives the winding roller 004 that has completed winding to flip 180°, so that the winding roller 004 that has completed winding is in the front, and the servo motor 508 drives the pressure roller 430 to immediately press the release film between the pressure roller 430 and the winding roller 004, and the hot melt tube at the bottom is started to disconnect the release mold, and the new winding roller 004 is at the rear, and the friction roller 006 is close to the new winding roller 004 to start the winding work. At this time, the staff can remove the release film rolled into a tube and replace it with a new winding roller 004.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic winding device for a release film, comprising: Fixing bracket (001); It is characterized by: also including: A tensioning roller (002), the tensioning roller (002) being arranged at the front end of the fixing frame (001), and the tensioning roller (002) being used to adjust the winding tension of the release film; A flip plate (003), the flip plate (003) being arranged on one side of the fixing frame (001), the flip plate (003) being used to automatically flip according to the winding progress of the release film, and a first motor (310) being installed at the rear end of the flip plate (003); A winding roller (004), wherein two winding rollers (004) are provided, and a second motor (410) is installed at the rear end of the winding roller (004). The two winding rollers (004) are arranged on one side of the flip plate (003), and the winding roller (004) is used to wind up the release film. The outer wall of the winding roller (004) is provided with a pressing groove (420), and a pressing roller (430) is arranged inside the pressing groove (420). A gap is provided between the pressing roller (430) and the pressing groove (420), and the cross-sectional shape of the pressing roller (430) is arranged in an arc shape. A plurality of pressure sensors (440) are arranged at equal intervals on one side of the pressing groove (420), and a plurality of air nozzles (450) are arranged at equal intervals on the other side of the pressing groove (420), and the positions of the plurality of pressure sensors (440) correspond to the positions of the air nozzles (450), and an air pump (460) is installed between the plurality of air nozzles (450); A fixing component (005), wherein the fixing component (005) is arranged at one end of the winding roller (004), and the fixing component (005) can be used to fix the release film; A friction roller (006), wherein two friction rollers (006) are provided, and the two friction rollers (006) are respectively provided on one side of two winding rollers (004), and the friction roller (006) can accurately adjust the tension of the release film and evenly wind up the release film; Both ends of the friction roller (006) are provided with L-shaped connecting plates (610), the L-shaped connecting plates (610) are movably connected to the friction roller (006), the friction roller (006) is in contact with the winding roller (004), the rear end of the L-shaped connecting plates (610) is fixedly connected to a fixing plate (620), and the rear end of the fixing plate (620) is provided with a positioning assembly (007); The positioning assembly (007) comprises a positioning plate (701), an outer wall of the positioning plate (701) is provided with a movable groove (702), the inner dimensions of the movable groove (702) match the outer dimensions of the fixed plate (620), the inner part of the positioning plate (701) is rotatably connected with a movable plate (703), the movable plate (703) is fixedly connected with the fixed plate (620), the rear end of the movable plate (703) is fixedly connected with a movable rod (704), the end of the movable rod (704) is movably connected with a telescopic rod (705), the rear end of the telescopic rod (705) passes through a positioning tube (706), the telescopic rod (705) is slidably connected with the positioning tube (706), a buffer spring (707) is arranged inside the positioning tube (706), and the positioning tube (706) is movably connected with the positioning plate (701).

2. The automatic release film winding device according to claim 1, characterized in that: Two clamping rollers (110) are arranged at the front end of the fixed frame (001), a gap is arranged between the two clamping rollers (110), both ends of the two clamping rollers (110) are fixedly connected with connecting gears (120), and the two connecting gears (120) are meshingly connected.

3. The automatic winding device for release film according to claim 1, characterized in that: Slide blocks (210) are provided at both ends of the tensioning roller (002), the shape of the slide blocks (210) is set to be "T"-shaped, the slide blocks (210) are slidably connected to the fixing frame (001), and the top ends of the two slide blocks (210) are provided with tensioning springs (220).

4. The automatic release film winding device according to claim 1, characterized in that: The flip plate (003) is fixedly connected to the winding roller (004); a first motor (310) is fixedly connected to the rear end of the flip plate (003); fixed rollers (320) are arranged on the upper and lower sides of the flip plate (003); a groove (330) is provided on the outer wall of the fixed roller (320); and an electric melting tube (340) is arranged inside the groove (330).

5. The automatic release film winding device according to claim 4, characterized in that: The left and right ends of the electric fusion tube (340) are fixedly connected to a connection block (341), the bottom end of the connection block (341) is fixedly connected to a toothed belt (342), the internal transmission connection of the toothed belt (342) is connected to two transmission gears (343), the end of one of the transmission gears (343) is fixedly connected to a transmission rod (344), and one end of the transmission rod (344) is fixedly connected to a stepping motor (345).

6. The automatic release film winding device according to claim 4, characterized in that: The fixing assembly (005) comprises a limit tube (501), the end of the limit tube (501) is connected to the flip plate (003) via a bearing, the inside of the limit tube (501) is rotatably connected to an adjustment plate (502), the outer wall of the adjustment plate (502) is provided with an adjustment groove (503), the adjustment groove (503) is inclined, the inside of the adjustment groove (503) is slidably connected to an adjustment block (504), the top of the adjustment block (504) is connected to a positioning plate (505), the outer wall of the adjustment plate (502) is fixedly connected to a limit gear ring (506), the side of the limit gear ring (506) is meshingly connected to a limit gear (507), and a servo motor (508) is installed at the end of the limit gear (507).

7. The automatic release film winding device according to claim 6, characterized in that: The positioning plate (505) passes through the pressure roller (430); the shape of the pressure roller (430) matches the shape of the pressure groove (420); a positioning screw (470) passes through the top of the pressure roller (430); and the positioning screw (470) is threadedly connected to the positioning plate (505).

8. The automatic winding device for release film according to claim 1, characterized in that: The sum of the lengths of the positioning disc (701) and the fixing plate (620) is equal to the distance between the positioning disc (701) and the winding roller (004), and a laser sensor (710) is provided on the rear side of the fixing plate (620).

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