Automatic winding structure for production of release film

Abstract

The application relates to the technical field of off-type film winding, and particularly discloses an automatic winding structure for off-type film production, which comprises rotatable replaceable winding devices; the winding device comprises two rotatable winding drums, at least one winding unit is arranged on each winding drum; the winding unit comprises a rotatable mounting frame; the modular winding unit is arranged, flexible switching between a non-slitting mode and a slitting mode of the same equipment is realized, in the non-slitting mode, the equipment can be used as a common wide-width winding machine, and is suitable for wide-width parent roll storage, rewinding and other operations, in the slitting mode, the winding unit is installed, the equipment can be converted into a precision slitting winding machine, and is suitable for precision winding operation of slitting the wide-width film into multiple narrow-width films, equipment idling and waste are effectively avoided, and equipment procurement cost and space occupation of the enterprise are reduced.

Description

Technical Field

[0001] This invention relates to the field of release film winding technology, and specifically proposes an automatic winding structure for release film production. Background Technology

[0002] Release film, also known as release film or anti-stick film, is a functional film coated with a release agent (usually silicone). It is widely used in many fields such as electronics, printing, packaging, medical, and labeling. In the production and use of release film, it is often necessary to cut the wide master roll into narrow finished rolls of different widths according to the specific needs of downstream customers, so as to facilitate subsequent die-cutting, lamination and other processes.

[0003] Currently, existing release film winding equipment is usually a special-purpose machine, mainly divided into two categories: one is a general winding machine specifically for wide-width film winding, which has a simple structure, strong driving capability, and is suitable for wide-width film winding and storage operations with large roll diameter and high torque, but does not have a slitting function; the other is a slitting and winding machine specifically for slitting operations, which has a complex structure, has multi-station independent control capability, and can slit wide-width film into multiple narrow-width films and perform precision winding, but cannot be used for wide-width film winding in non-slitting state, and cannot meet diversified production needs.

[0004] Meanwhile, with the diversification of market demand, release film processing companies are facing orders characterized by "multiple varieties, small batches, and frequent changes." However, existing slitting and winding equipment is extremely cumbersome to operate when switching slitting specifications (i.e., changing the width of narrow-width film). Operators need to manually move the positions of multiple winding units on the main shaft, remeasure the spacing between each unit to ensure accurate slitting width, and perform centering and adjustment operations on each unit. With frequent production changes, a significant amount of production time is wasted on equipment adjustments, seriously affecting the effective operating time and production efficiency of the equipment. At the same time, repeated disassembly, assembly, and adjustment also increase the risk of equipment wear and human error, affecting the consistency of winding quality.

[0005] Therefore, there is an urgent need for an automatic winding structure for release film production that can accommodate both slitting and non-slitting working modes, flexibly switch according to production needs, support rapid production changeover adjustments, and improve the overall utilization rate and production efficiency of equipment. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides an automatic winding structure for release film production, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention employs the following technical solution: an automatic winding structure for release film production, used for winding operations when cutting wide release film into narrow release film, comprising a rotatable and replaceable winding device; the winding device includes two rotatable winding drums, each winding drum being provided with at least one winding unit; the winding unit includes a rotatable mounting frame, two positioning frames, and at least two rotatable winding rollers, the mounting frame being sleeved on the surface of the winding drum; the axial distance between the two positioning frames is adjustable to accommodate release films of different widths. The release film is mounted between two positioning frames to wind up the cut release film. When no cutting is being performed, the structure is in Mode 1, where the mounting frames are not mounted on the surface of the winding drums, and the two winding drums on the winding device rotate to take turns winding the release film. When a cutting operation is required, the structure is in Mode 2, where the mounting frames and positioning frames are respectively mounted to the required positions on the two winding drums, the cut release film is wound on the surface of the winding drums, and the tension is adjusted by the rotation of the mounting frames. At the same time, the positions of the winding drums can be exchanged for alternating winding.

[0008] Preferably, in Mode 1, when the winding length of one of the winding drums reaches a preset value, the winding device rotates to change the position of the winding drum for winding; in Mode 2, when the length of one of the winding rollers reaches a preset value, the mounting frame rotates to change the position of the winding roller for winding.

[0009] Preferably, the surfaces of the two positioning frames are equipped with detachable drive motors, which can work independently or in concert. The surface of the take-up drum is equipped with a tension motor for driving the mounting frame to rotate and adjust the tension of the take-up roller.

[0010] Preferably, the winding drum has a tubular structure, and its interior can be cooled by introducing a heat dissipation medium to cool the release film during the winding process.

[0011] Preferably, the winding device further includes two turntables, and the winding drum is installed between the two turntables.

[0012] Preferably, the positioning frame includes two semi-rings, each semi-ring having a limiting plate integrally formed on its surface, and the semi-rings being mounted on the surface of the mounting frame.

[0013] Preferably, the surface of the mounting bracket is provided with a mounting groove, the interior of the half-ring is provided with an integrally formed mounting block, the mounting block is locked inside the mounting groove, and a distance fixing device is provided between the two positioning brackets.

[0014] Preferably, the distance fixing device includes two locking plates, which are respectively locked onto the surface of the positioning frame, and each locking plate is correspondingly locked onto the surface of the two limiting plates.

[0015] Preferably, a threaded rod is threaded between the two snap-fit ​​plates, one end of which is fixed to the surface of one of the snap-fit ​​plates by a bearing, and the other end of which is threaded onto the surface of the other snap-fit ​​plate.

[0016] Preferably, a self-rotating sleeve one is fixedly mounted on the surface of the mounting bracket by a locking block, and a sleeve two for rotating connection of the threaded rod is fixedly mounted on the surface of the sleeve one.

[0017] The above technical solution has the following advantages or beneficial effects: 1. The present invention provides an automatic winding structure for release film production. By setting up modular winding units, the same equipment can be flexibly switched between non-slitting mode and slitting mode. In non-slitting mode, the equipment can be used as a general wide-width winding machine, which is suitable for the storage, rewinding and other operations of wide-width master rolls. In slitting mode, by installing winding units, the equipment can be converted into a precision slitting and winding machine, which is suitable for the precision winding operation of cutting wide-width films into multiple narrow-width films. This effectively avoids equipment idleness and waste, and reduces the equipment procurement cost and space occupation of enterprises.

[0018] 2. This invention provides an automatic winding structure for release film production. Through a rotatable and replaceable winding drum and winding roller, roll changing is achieved without stopping the machine. In mode one, the winding drum is rotated and replaced by a turntable. In mode two, the winding roller is rotated and its position is exchanged by a mounting frame. In both modes, the winding drum can automatically switch to the standby roll position when the winding length reaches the preset value and continue the winding operation, which can effectively improve the winding efficiency.

[0019] 3. This invention provides an automatic winding structure for release film production. Through the design of an adjustable axial distance positioning frame, combined with a precise distance fixing device, the winding width can be quickly and accurately adjusted. The operator only needs to rotate the threaded rod to simultaneously adjust the distance between the two positioning frames. Combined with the scale markings, the width adjustment of a winding unit can be completed within 2-3 minutes. For a complete machine with multiple winding units, the changeover time is shortened from several hours in the traditional way to 15-20 minutes, which greatly improves the effective operating time and production efficiency of the equipment. It is particularly suitable for the current market demand for multi-variety, small-batch, and frequent changeover production. Attached Figure Description

[0020] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0021] Figure 1 This is a three-dimensional structural diagram of the automatic winding structure for release film production provided by the present invention, under the slitting mode.

[0022] Figure 2 This is a three-dimensional structural diagram of the winding device.

[0023] Figure 3 This is a three-dimensional structural diagram of an automatic winding structure for release film production provided by the present invention in the non-slitting mode.

[0024] Figure 4 This is a three-dimensional structural diagram of the winding unit.

[0025] Figure 5 This is a three-dimensional structural diagram of the positioning frame.

[0026] Figure 6 This is a schematic diagram of the installation structure of the mounting bracket and sleeve one.

[0027] In the diagram: 1. Drive motor; 2. Winding device; 21. Winding drum; 22. Winding unit; 221. Mounting frame; 222. Positioning frame; 223. Winding roller; 23. Turntable; 3. Half ring; 4. Limiting plate; 5. Mounting groove; 6. Mounting block; 7. Distance setting device; 71. Clip plate; 72. Threaded rod; 8. Clip block; 9. Sleeve one; 10. Sleeve two. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This invention provides an automatic winding structure for release film production, used for winding wide release films into narrow release films. The structure adopts a modular, dual-mode design to solve the technical problems of existing equipment having single functions, poor adaptability, cumbersome production changeover adjustments, and low efficiency.

[0031] like Figure 1 and Figure 2As shown, the automatic winding structure includes: a rotatable and replaceable winding device 2; the winding device 2 includes two rotatable winding drums 21, each winding drum 21 being provided with at least one winding unit 22; the winding unit 22 includes a rotatable mounting frame 221, the mounting frame 221 being sleeved and mounted on the surface of the winding drum 21; two positioning frames 222, the axial distance of which is adjustable to accommodate release films cut to different widths; and at least two rotatable winding rollers 223, installed between the two positioning frames 222, for winding the cut release film.

[0032] This enables two working modes for the above structure: Mode 1 (non-slitting mode) and Mode 2 (slitting mode). The two modes can be flexibly switched according to production needs, greatly improving the adaptability and utilization of the equipment.

[0033] like Figure 2 and Figure 3 As shown, the winding device 2 includes two oppositely arranged turntables 23, and two winding drums 21 are installed in parallel between the two turntables 23. The two winding drums 21 can exchange positions as the turntables 23 rotate. It should be noted that the turntables 23 are disc-shaped structures with a rotating shaft (not shown in the figure) at their center. The turntables 23 are driven to rotate around their central axis by a drive mechanism (such as a motor). The ends of the two winding drums 21 are fixedly installed at corresponding positions on the two turntables 23, and the two winding drums 21 are symmetrically arranged with respect to the central axis of the turntables 23. When the turntables 23 rotate 180°, the positions of the two winding drums 21 are interchanged, thereby realizing the switching of the winding station.

[0034] The take-up drum 21 is a cylindrical long shaft structure made of high-strength metal material. Its surface is precision machined to ensure its roundness and straightness. Both ends of the take-up drum 21 are mounted on the turntable 23 through bearing seats (not shown in the figure), so that the take-up drum 21 can rotate freely relative to the turntable 23. Each take-up drum 21 is driven by an independent motor (not shown in the figure), which can realize independent rotation and tension control.

[0035] like Figure 2 and Figures 4-6 As shown, the winding unit 22 includes a mounting frame 221, a positioning frame 222, and a winding roller 223. The mounting frame 221 is a cylindrical structure with an inner diameter slightly larger than the outer diameter of the winding drum 21, so that the mounting frame 221 can be sleeved on the surface of the winding drum 21 and can slide axially and rotate around the axis on the winding drum 21. The mounting frame 221 is made of lightweight and high-strength materials (such as aluminum alloy or engineering plastics) to reduce the overall weight and facilitate disassembly and assembly by operators.

[0036] The surface of the mounting bracket 221 has multiple mounting grooves 5, which extend axially and are used to cooperate with the positioning bracket 222 for installation. The mounting grooves 5 are equipped with locking blocks 8 inside, which are used to fix the sleeve 9 on the surface of the mounting bracket 221. The mounting bracket 221 is provided with a limit ring (not shown in the figure) inside to ensure that the mounting bracket 221 rotates along the surface of the winding drum 21 and the position of the mounting bracket 221 is fixed by the locking blocks 8.

[0037] The positioning frame 222 includes two semi-circular rings 3. The semi-circular rings 3 are semi-circular in shape, and when closed together, they form a complete ring that fits onto the surface of the mounting frame 221. The semi-circular rings 3 are made of cast or machined metal, possessing high strength and rigidity. An integrally formed mounting block 6 is provided on the inner wall of each semi-circular ring 3. The shape of the mounting block 6 matches the mounting groove 5 on the surface of the mounting frame 221. The mounting block 6 can be inserted into the mounting groove 5, achieving circumferential fixation and axial guidance between the positioning frame 222 and the mounting frame 221. When the mounting block 6 is inserted into the mounting groove 5, the positioning frame 222 can slide axially along the mounting frame 221, but cannot rotate relative to it.

[0038] The outer surface of the half ring 3 is integrally formed with a limiting plate 4. The limiting plate 4 is a plate-shaped structure that extends radially and is used to limit the edge of the release film during the winding process to prevent deviation. The surface of the limiting plate 4 is smooth to avoid scratching the release film. Each half ring 3 is provided with two limiting plates 4, which are located on both sides of the half ring 3 respectively. After the two half rings 3 are closed, the four limiting plates 4 are opposite each other in pairs to form a double limiting of the edge of the release film.

[0039] Two positioning frames 222 are arranged opposite to each other and together clamp and install a take-up roller 223. The axial distance between the two positioning frames 222 can be precisely adjusted by a spacer 7 set between the positioning frames 222 to accommodate release films of different widths.

[0040] The take-up roller 223 has a slender cylindrical structure, with its two ends mounted on two positioning frames 222 respectively, and can rotate freely relative to the positioning frames 222. The take-up roller 223 is made of lightweight and high-strength materials, such as aluminum alloy or carbon fiber composite materials, and its surface is hardened to improve wear resistance. The surface of the take-up roller 223 is smooth to avoid scratching the release film. Each take-up unit 22 is provided with two take-up rollers 223, which are located on both sides between the two positioning frames 222 respectively. When one take-up roller 223 is performing a take-up operation, the other take-up roller 223 is in a standby state. After the film roll on the take-up roller 223 reaches the preset length, the positions of the two take-up rollers 223 are exchanged by rotating the mounting frame 221 to achieve roll changing without stopping the machine.

[0041] Two positioning frames 222 are equipped with detachable drive motors 1, which can work independently or in conjunction. The drive motors 1 are miniature servo motors, which are fixedly mounted on the positioning frames 222 via motor mounts (not shown in the figure). The output shaft of the drive motor 1 is connected to the end of the take-up roller 223, which can directly drive the take-up roller 223 to rotate, thereby achieving precise control of the take-up speed and tension.

[0042] A tensioning motor (not shown in the figure) is mounted on the surface of the take-up drum 21. The tensioning motor is a micro stepper motor, which is connected to the mounting frame 221 through a reduction mechanism. It is used to drive the mounting frame 221 to rotate relative to the take-up drum 21, thereby adjusting the angle of the take-up roller 223 relative to the film strip path and realizing fine adjustment of the tension. The rotation angle of the tensioning motor is small (usually within ±10°), which can achieve precise adjustment.

[0043] The distance fixing device 7 includes two snap-fit ​​plates 71. The snap-fit ​​plates 71 are plate-shaped structures with snap-fit ​​grooves on their inner sides. The shape of the snap-fit ​​grooves matches the shape of the upper limit plate 4 of the positioning frame 222. The snap-fit ​​plates 71 are snapped onto the surface of the positioning frame 222 through the snap-fit ​​grooves, and each snap-fit ​​plate 71 is snapped onto the surface of the two limit plates 4 to ensure the stability and reliability of the connection.

[0044] A threaded rod 72 is threaded between the two snap-fit ​​plates 71. Specifically, one end of the threaded rod 72 is fixed to the surface of one of the snap-fit ​​plates 71 by a bearing, so that the threaded rod 72 can rotate freely relative to the snap-fit ​​plate 71 but cannot move axially. The other end of the threaded rod 72 is provided with an external thread and is threadedly installed in the threaded hole of the other snap-fit ​​plate 71. When the threaded rod 72 is rotated, since one end of the threaded rod 72 is axially fixed and the other end is threadedly connected to the snap-fit ​​plate 71, the distance between the two snap-fit ​​plates 71 will change with the rotation of the threaded rod 72, thereby driving the two positioning frames 222 to move synchronously and achieve precise adjustment of the winding width.

[0045] A self-rotating sleeve 9 is fixedly mounted on the surface of the mounting bracket 221 via a locking block 8. Specifically, the locking block 8 is a ring structure and is fixedly mounted on the end of the mounting bracket 221. The sleeve 9 is rotatably mounted inside the locking block 8, allowing the sleeve 9 to rotate freely relative to the mounting bracket 221. A second sleeve 10 is fixedly mounted on the surface of the sleeve 9. The second sleeve 10 is a tubular structure with an inner diameter slightly larger than the outer diameter of the threaded rod 72. The threaded rod 72 passes through the interior of the second sleeve 10 and is used to rotatably connect the threaded rod 72. When the mounting bracket 221 rotates, the threaded rod 72 can rotate freely inside the second sleeve 10, ensuring the stability and reliability of the distance fixing device 7 during the rotation of the mounting bracket 221.

[0046] The take-up drum 21 is a tubular structure with an internal cavity that extends through the entire drum along its axial direction. Both ends of the take-up drum 21 are provided with an inlet and an outlet (not shown in the figure). The inlet and outlet are connected to an external cooling circulation system via rotary joints. During cooling, a heat dissipation medium (such as cooling water, cooling oil, or compressed air) can be introduced into the take-up drum 21 through the inlet. The heat dissipation medium flows inside the take-up drum 21, carrying away the heat generated during the winding process, and then flows out from the outlet, achieving circulating cooling. This effectively removes the heat accumulated during high-speed winding, preventing changes in the release agent's performance or film adhesion problems caused by temperature rise.

[0047] When no cutting operation is performed, the structure is in the non-cutting state of Mode 1. At this time, components such as the mounting frame 221, positioning frame 222, and take-up roller 223 are not installed on the surface of the take-up drum 21. The two take-up drums 21 of the take-up device 2 are used directly as take-up shafts. Both take-up drums 21 are empty. One take-up drum 21 is located at the take-up station (i.e., facing the direction of the incoming film), and the other take-up drum 21 is located at the preparatory station. The wide-width release film is directly wound onto the surface of the take-up drum 21 located at the take-up station. The take-up drum 21 is... The motor drives the rotation for winding operations. The tension during winding is controlled by the motor of the winding drum 21, which is existing technology and will not be described in detail. During winding, the winding length is detected in real time by an encoder or laser rangefinder. When the film roll length on the winding drum 21 reaches the preset value, the system issues a roll change command. The turntable 23 drive mechanism starts, driving the turntable 23 to rotate 180°, switching another empty winding drum 21 located in the preparatory position to the winding position, and simultaneously switching the full winding drum 21 to the preparatory position. During the switching process, the film is cut by a cutting mechanism such as a flying knife or a swing arm knife, and the film head is attached to the new winding drum 21 by means of pressure rollers or vacuum adsorption, realizing roll change without stopping the machine. The full winding drum 21 located in the preparatory position stops rotating, and the operator or automatic unloading mechanism unloads it and installs a new empty paper tube, ready for the next roll change.

[0048] When cutting is required, the structure is in the cutting mode of mode two. At this time, the operator installs the mounting frame 221, positioning frame 222 and take-up roller 223 and other components to the required positions of the two take-up drums 21. Multiple mounting frames 221 are sequentially sleeved on the surface of the two take-up drums 21. The number and position of the mounting frames 221 are determined according to the required number of narrow film. Two positioning frames 222 are installed on each mounting frame 221. The mounting block 6 of the half ring 3 is aligned with the mounting groove 5 of the mounting frame 221. Then the two half rings 3 are closed. The axial distance between the two positioning frames 222 is adjusted according to the required width of the narrow film. The threaded rod 72 is rotated so that the two snap-fit ​​plates 71 drive the two positioning frames 222 to move synchronously until the distance reaches the set value. The drive motor 1 is installed on each positioning frame 222 and the take-up roller 223 is installed between the two positioning frames 222. The snap-fit ​​plate 71 of the distance fixing device 7 is snapped onto the limiting plate 4 of the positioning frame 222 to complete the installation of the distance fixing device 7.

[0049] Multiple winding units 22 are installed on both winding drums 21. Each winding unit 22 has two winding rollers 223, one of which is located at the winding station and the other at the preparatory station. The wide release film is cut into multiple narrow films by an upstream slitting device (not shown in the figure). Each narrow film corresponds to a winding unit 22 and is conveyed to the winding station of the winding unit 22. Each narrow film is wound onto the surface of the winding roller 223 located at the winding station of the corresponding winding unit 22. The take-up roller 223 is driven to rotate by its corresponding drive motor 1 to perform the take-up operation. The tension during the take-up process is independently controlled by the drive motor 1 and can be precisely adjusted according to the actual needs of each narrow film. If the tension of a narrow film fluctuates during the take-up process, the mounting frame 221 can be slightly rotated (usually within ±10° range) by the corresponding tension motor to change the angle of the take-up roller 223 relative to the film strip path, thereby fine-tuning the take-up tension and ensuring stable tension. Each take-up unit 22 independently detects the take-up length on its take-up roller 223. When the film roll length on a take-up roller 223 is detected to reach the preset value, the take-up unit 22 issues a roll change command. The mounting frame 221 of the take-up unit 22 is driven to rotate 180° by its tension motor, switching another empty take-up roller 223 in the preparatory position of the take-up unit 22 to the take-up position, and at the same time switching the fully wound take-up roller 223 to the preparatory position. During the switching process, the film is cut by the cutting mechanism and the film head is attached to the new take-up roller 223 by means of pressure roller or vacuum adsorption, so as to achieve roll change without stopping the machine. The fully wound take-up roller 223 located in the preparatory position stops rotating. The operator removes the clamping block 8 and rotates the sleeve 9 so that the clamping plate 71 is away from one of the pair of limiting plates 4. At this time, by moving the position of the limiting plate 4, the fully wound take-up roller 223 can be removed and replaced with a new take-up roller 223, without affecting the take-up roller 223 that is currently being wound.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An automatic winding structure for release film production, used for the winding operation when cutting wide release film into narrow release film, characterized in that, include: Rotatable and replaceable winding device; The winding device includes two rotatable winding drums, each of which is provided with at least one winding unit; The winding unit includes: A rotatable mounting bracket, which is sleeved and mounted on the surface of the take-up drum; Two positioning frames with adjustable axial distance to accommodate release films cut to different widths; At least two rotatable take-up rollers are mounted between two positioning frames for winding up the cut release film; The positioning frame includes two semi-rings, and a limiting plate is integrally formed on the surface of each semi-ring. The semi-rings are mounted on the surface of the mounting frame. The surface of the mounting bracket is provided with a mounting groove, and the interior of the half-ring is provided with an integrally formed mounting block. The mounting block is locked inside the mounting groove, and a distance fixing device is provided between the two positioning brackets. The distance fixing device includes two snap-fit ​​plates, which are snapped onto the surface of the positioning frame, and each snap-fit ​​plate is snapped onto the surface of two limiting plates. When no cutting operation is being performed, the structure is in Mode 1, with the mounting frame not installed on the surface of the take-up drum. The two take-up drums on the take-up device rotate and take turns winding the release film. When a cutting operation is required, the structure is in Mode 2, with the mounting frame and positioning frame installed at the required positions on the two take-up drums. The release film to be cut is wound on the surface of the take-up drums, and the tension is adjusted by the rotation of the mounting frame. At the same time, the positions of the take-up drums can be exchanged for alternating winding.

2. The automatic winding structure for release film production according to claim 1, characterized in that: In Mode 1, when the winding length of one of the winding drums reaches a preset value, the winding device rotates to change the position of the winding drum for winding; in Mode 2, when the length of one of the winding rollers reaches a preset value, the mounting frame rotates to change the position of the winding roller for winding.

3. The automatic winding structure for release film production according to claim 1, characterized in that: The surfaces of the two positioning frames are equipped with detachable drive motors, which can work independently or in concert. The surface of the take-up drum is equipped with a tension motor, which drives the mounting frame to rotate and adjust the tension of the take-up roller.

4. The automatic winding structure for release film production according to claim 1, characterized in that: The winding drum has a tubular structure, and its interior can be cooled by introducing a heat dissipation medium to cool the release film during the winding process.

5. The automatic winding structure for release film production according to claim 1, characterized in that: The winding device also includes two turntables, with the winding drum installed between the two turntables.

6. The automatic winding structure for release film production according to claim 1, characterized in that: A threaded rod is threaded between the two snap-fit ​​plates. One end of the threaded rod is fixed to the surface of one of the snap-fit ​​plates by a bearing, and the other end of the threaded rod is threaded onto the surface of the other snap-fit ​​plate.

7. The automatic winding structure for release film production according to claim 6, characterized in that: The surface of the mounting bracket is fixedly mounted with a self-rotating sleeve one by means of a locking block, and the surface of the sleeve one is fixedly mounted with a sleeve two for rotating connection of the threaded rod.

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