Winding device for functional polymeric membrane material production

By designing a variety of components and power devices, the wrinkle problem of traditional winding machines when winding polymer film materials is solved, the film surface is flat and gas removal is achieved, and the winding quality is improved.

CN119218790APending Publication Date: 2024-12-31TIANJIN FULONG METAL PRODUCTS CO LTD
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Patent Information

Application Number
CN202411071254.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-06
Publication Date
2024-12-31

AI Technical Summary

Technical Problem

Traditional winders tend to produce slight wrinkles when winding polymer film materials, making it difficult to completely flatten the molecular film.

Method used

A coiling device for the production of functional polymer membrane materials is designed, including base plate, working frame, triangle plate, correction component, fixing component, tension component and posting component, through rotating shaft, rotating wheel, compression bladder, arc plate, and grabbing block , wedge plates and circular plates, combined with the power device to drive the rotating shaft, rotor and push plate, to realize the laying, extrusion of the molecular film and the push-pull and pulling leveling of wrinkles, and remove gas and dust.

Benefits of technology

It effectively avoids wrinkles during the winding process of the molecular film, ensures that the film surface is flat, removes gas and dust inside the winding, and improves the winding quality.

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Abstract

The invention relates to the technical field of molecular film winding, and discloses a functional polymeric film material production winding device which comprises a bottom plate, a working frame fixedly connected to the top of the bottom plate, triangular plates fixedly connected to the top of the working frame and arranged at the two ends of the top of the working frame, and further comprises a fixing component and a winding component, comprising a wheel pipe fixedly connected with the surface of a triangular plate, the wheel pipe is arranged at the bottom of a rotating rod, the bottom of the inner wall of the wheel pipe is rotationally connected with a rotating shaft, a wedge-shaped groove is formed in the surface of the rotating shaft, the surface of the rotating shaft is fixedly connected with a lower pressing plate, and the inner wall of the lower pressing plate is fixedly connected with a sliding ring. By arranging the fixing part, the power device is started to drive the rotating shaft to rotate on the inner wall of the wheel pipe, the molecular film is laid on the surface of the lower pressing plate along the rotating shaft after rotating for a circle on the surface of the rotating shaft, and during laying, the arc plate rotates on the inner wall of the lower pressing plate through the sliding block to move to the surface of the molecular film; and gas between the molecular films is discharged outwards by scraping the surfaces of the molecular films through the arc plates.
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Description

Technical Field

[0001] The invention relates to the technical field of molecular film winding, in particular to a winding device for producing functional polymer film materials. Background Art

[0002] Winders are widely used in paper rolls, cloth rolls, plastic rolls, and metal coil processing production lines. They are designed in a variety of ways according to actual process requirements. Common ones include simple winders and hydraulic winders. Winders generally have strict requirements on the inner diameter, outer diameter, thickness, and width of the roll. The patent application with patent number 202221800477.4 discloses a winding device for polymer film material production, which relates to the technical field of winding machines, including a No. 1 motor, a guide plate is arranged on one side of the No. 1 motor, a square cabinet is arranged on one end of the guide plate, a clamping assembly is movably arranged on one side of the square cabinet, and one end of the clamping assembly is slidably arranged inside the vertical groove. The present invention solves the problem that the traditional winding machine is not convenient to lay the winding target flat when winding; However, the patent also has the following shortcomings, that is, after the functional polymer film material is rolled up, the molecular film will produce slight wrinkles on the surface of the winder. In view of this situation, a winding device for the production of functional polymer film materials is specially proposed. Summary of the invention

[0003] The object of the present invention is to provide a winding device for producing functional polymer film materials to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A winding device for producing functional polymer film materials, comprising a bottom plate, a working frame is fixedly connected to the top of the bottom plate, a triangular plate is fixedly connected to the top of the working frame, and the triangular plate is arranged at both ends of the top of the working frame, and further comprising: The correction component includes a rotating rod rotatably connected to the surface of the triangular plate, a rotating wheel fixedly connected to the surface of the rotating rod, a connecting plate fixedly connected to the surface of the rotating wheel, a compression tube fixedly connected to the inner wall of the connecting plate, a compression bag fixedly connected to the bottom of the inner wall of the compression tube, and the compression bag is squeezed during the squeezing process; The fixing component includes a wheel tube fixedly connected to the surface of the triangular plate, the wheel tube is arranged at the bottom of the rotating rod, the bottom of the inner wall of the wheel tube is rotatably connected with a rotating shaft, the surface of the rotating shaft is provided with a wedge-shaped groove, the surface of the rotating shaft is fixedly connected with a lower pressure plate, the inner wall of the lower pressure plate is fixedly connected with a slip ring, the surface of the wheel tube is provided with a tension component, and posting components are arranged on both sides of the inner wall of the working frame. After the compression bag is squeezed, the air pressure discharged outward drives the blowing block to protrude forward into the wedge-shaped groove.

[0005] According to the above technical solution, the tension component includes a shrinkage plate, which is fixedly connected to the surface of the wheel tube, a movable plate is fixedly connected to the left side of the shrinkage plate, connecting blocks are slidably connected to both sides of the inner wall of the movable plate, a compression ring is fixedly connected to the bottom of the connecting block, and the end of the compression ring away from the connecting block is fixedly connected to a table plate, which pushes the connecting block to move the table plate by sliding on the inner wall of the movable plate.

[0006] According to the above technical solution, the posting component includes a wedge plate, including a wedge plate fixedly connected to both sides of the inner wall of the working frame, the bottom of the inner wall of the wedge plate is slidably connected with a sliding plate, the top of the sliding plate is fixedly connected with a shift plate, the inner wall of the shift plate is rotatably connected with a hinge ring, the surface of the hinge ring is provided with a blowing hole, the surface of the shift plate is rotatably connected with a connecting rod, the connecting rod passes through the surface of the shift plate, the surface of the connecting rod is fixedly connected with a push plate, the end of the push plate away from the connecting rod is fixedly connected with a push ring, the surface of the push ring is fixedly connected with a push pad, and the push pad is squeezed when the rotating shaft rotates.

[0007] According to the above technical solution, the correction component also includes a pressure plate, which is fixedly connected to the top of the connecting plate. A blowing block is fixedly connected to the top of the connecting plate. The blowing block is arranged in the middle of the pressure plate. After contact, the pressure plate squeezes the molecular film.

[0008] According to the above technical solution, the fixed component also includes a sliding block, which is rotatably connected to the inner wall of the lower pressure plate. The end of the sliding block away from the lower pressure plate is fixedly connected to an arc plate. During laying, the arc plate rotates and moves on the inner wall of the lower pressure plate to the surface of the molecular membrane through the sliding block.

[0009] According to the above technical solution, the tension component also includes a junction plate, which is fixedly connected to the surface of the rotating shaft, and a sliding hole is opened on the surface of the junction plate. The table plate is slidably connected to the inner wall of the sliding hole, and a grab block is fixedly connected to the bottom of the table plate. The inner walls of the movable plate are fixedly connected with limiting blocks on both sides, and the wrinkles on the surface of the molecular membrane are pushed, pulled and flattened by the grab block at the bottom of the table plate.

[0010] According to the above technical solution, the posting component also includes a circular plate, which is fixedly connected to the surface of the connecting rod, and an annular hole is opened on the surface of the circular plate, and an air pressure pad is fixedly connected to the bottom of the inner wall of the annular hole, and an elastic plate is fixedly connected to the surface of the air pressure pad, and a compressed air cavity is fixedly connected to the bottom of the inner wall of the circular plate, and a jet plate is fixedly connected to the top of the compressed air cavity, and the jet plate contacts the hinge ring to squeeze the elastic plate.

[0011] According to the above technical solution, the number of the lower pressing plates is set to two, and the two lower pressing plates are symmetrically installed on the surface of the rotating shaft with the center line of the rotating shaft as the symmetry axis, and the molecular film is laid on the surface of the lower pressing plate along the rotating shaft.

[0012] Compared with the prior art, the present invention provides a winding device for producing functional polymer film materials, which has the following beneficial effects: 1. The present invention is provided with a fixing component, and the molecular film material is placed in the working frame. The power device is started to drive the rotating shaft to rotate on the inner wall of the wheel tube. After the molecular film rotates one circle on the surface of the rotating shaft, the molecular film is laid on the surface of the lower pressure plate along the rotating shaft. During the laying, the arc plate is rotated and moved on the inner wall of the lower pressure plate to the surface of the molecular film through the sliding block, and the arc plate scrapes the surface of the molecular film to discharge the gas between the molecular films to the outside.

[0013] 2. The present invention is provided with a correction component and a fixing component, and a power device is started to drive the wheel on the surface of the rotating rod to rotate. During rotation, the connecting plate contacts the molecular membrane on the surface of the rotating shaft. After contact, the pressure plate squeezes the molecular membrane to discharge the gas in the molecular membrane from the inside. During the squeezing process, the compression bag is squeezed, and the compression bag is expelled outwardly after being squeezed. The air pressure drives the blowing block to protrude forward into the wedge-shaped groove. By setting this component, the gas in the wound molecular membrane can be discharged outward.

[0014] 3. The present invention is provided with a tension component. After the molecular membrane is wound, its two ends are fixed on the inner wall of the junction plate. After winding, there will be slight wrinkles on the two ends of the molecular membrane. At this time, the connection block is pushed to move the table by sliding on the inner wall of the movable plate, and the wrinkles on the surface of the molecular membrane are pushed and pulled to be flattened by the grab block at the bottom of the table. When the connection block is compressed and bent by the compression ring and moved to the inner wall of the contraction plate, the grab block completely flattens the surface of the molecular membrane.

[0015] 4. The present invention is provided with a posting component. When the rotating shaft rotates, the push pad is squeezed and the push plate is driven to rotate on the surface of the connecting rod. The push plate drives the circular plate to rotate. The jet plate contacts the hinge ring to squeeze the elastic plate. During the squeezing process, the air pressure pad is contacted, and the gas inside the air pressure pad is ejected from the jet plate to the outside. Finally, the gas is ejected outward from the blowing hole to clean the dust on the surface of the molecular membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross-sectional structural diagram of a runner of the present invention; Figure 3 yes Figure 2 A magnified schematic diagram of part A; Figure 4 It is a schematic cross-sectional structural diagram of the rotating shaft of the present invention; Figure 5 It is a schematic diagram of the structure of the branch board of the present invention; Figure 6 yes Figure 5 A magnified schematic diagram of part B; Figure 7 is a schematic cross-sectional structural diagram of a wedge-shaped plate of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the circular plate of the present invention.

[0017] In the figure: 1, bottom plate; 2, working frame; 3, triangle plate; 4, correction component; 401, rotating rod; 402, rotating wheel; 403, connecting plate; 404, compression capsule; 405, compression tube; 406, pressing plate; 407, blowing block; 5, fixed component; 501, wheel tube; 502, rotating shaft; 503, wedge groove; 504, lower pressing plate; 505, slip ring; 506, sliding block; 507, arc plate; 6, tension component; 601, contraction plate; 602, movable plate; 603, connecting block; 604, compression bag; 605, compression tube; 606, pressing plate; 607, blowing block; 608, tension component; 609, tension component; 610, tension component; 611, tension component; 612, tension component; 613, tension component; 614, tension component; 615, tension component; 616, tension component; 617, tension component; 618, tension component; 619, tension component; 620, tension component; 621, tension component; 622, tension component; 623, tension component; 624, tension component; 625, tension component; 626, tension component; 627, tension component; 628, tension component; 629, tension component; 630, tension component; 631, tension component; 632, tension component; 633, tension component; 634, tension component; 635, tension component; 636, tension component; 637, tension component; 638, tension component; 639, tension component; 640, tension component; 641, tension component; 642, tension component; 643, tension component; 644, tension component; 645 04, limit block; 605, compression ring; 606, tapping plate; 607, sliding hole; 608, table; 609, grab block; 7, posting component; 701, wedge plate; 702, sliding plate; 703, shift plate; 704, connecting rod; 705, blowing hole; 706, hinged ring; 707, push plate; 708, push ring; 709, push pad; 710, circular plate; 711, annular hole; 712, air pressure pad; 713, compression air cavity; 714, jet plate; 715, elastic plate. DETAILED DESCRIPTION

[0018] 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.

[0019] For example, see Figure 1-Figure 4 The present invention provides a technical solution: a winding device for producing functional polymer film materials, comprising a bottom plate 1, a working frame 2 is fixedly connected to the top of the bottom plate 1, a triangular plate 3 is fixedly connected to the top of the working frame 2, and the triangular plate 3 is arranged at both ends of the top of the working frame 2, and also includes: The correction component 4 includes a rotating rod 401 rotatably connected to the surface of the triangular plate 3, a rotating wheel 402 is fixedly connected to the surface of the rotating rod 401, a connecting plate 403 is fixedly connected to the surface of the rotating wheel 402, a compression tube 405 is fixedly connected to the inner wall of the connecting plate 403, a compression capsule 404 is fixedly connected to the bottom of the inner wall of the compression tube 405, and the correction component 4 also includes a pressing plate 406, the pressing plate 406 is fixedly connected to the top of the connecting plate 403, a blowing block 407 is fixedly connected to the top of the connecting plate 403, and the blowing block 407 is arranged in the middle of the pressing plate 406; The fixing component 5 includes a wheel tube 501 fixedly connected to the surface of the triangular plate 3, the wheel tube 501 is arranged at the bottom of the rotating rod 401, the bottom of the inner wall of the wheel tube 501 is rotatably connected to a rotating shaft 502, the surface of the rotating shaft 502 is provided with a wedge-shaped groove 503, the surface of the rotating shaft 502 is fixedly connected to a lower pressure plate 504, the inner wall of the lower pressure plate 504 is fixedly connected to a slip ring 505, the number of the lower pressure plates 504 is set to two, the two lower pressure plates 504 are symmetrically installed on the surface of the rotating shaft 502 with the center line of the rotating shaft 502 as the symmetry axis, the surface of the wheel tube 501 is provided with a tension component 6, and the inner walls of the working frame 2 are provided with posting components 7, the fixing component 5 also includes a sliding block 506, the sliding block 506 is rotatably connected to the inner wall of the lower pressure plate 504, and the end of the sliding block 506 away from the lower pressure plate 504 is fixedly connected to an arc plate 507, the molecular membrane material is placed in the working frame 2, The power device is started to drive the rotating shaft 502 to rotate on the inner wall of the wheel tube 501. After the molecular film rotates one circle on the surface of the rotating shaft 502, the molecular film is laid on the surface of the lower pressure plate 504 along the rotating shaft 502. During laying, the arc plate 507 rotates and moves to the surface of the molecular film on the inner wall of the lower pressure plate 504 through the sliding block 506. The arc plate 507 scrapes the surface of the molecular film to discharge the gas between the molecular films outwardly. The power device is started to drive the rotating wheel 402 on the surface of the rotating rod 401 to rotate. During rotation, the connecting plate 403 contacts the molecular film on the surface of the rotating shaft 502. After contact, the pressure plate 406 squeezes the molecular film to discharge the gas in the molecular film from the inside. During the squeezing process, the compression capsule 404 is squeezed. After the compression capsule 404 is squeezed, the air pressure discharges outward and drives the blowing block 407 to protrude forward into the wedge-shaped groove 503, so that the gas in the wrapped molecular film can be discharged outwardly.

[0020] Embodiment 2: The difference from embodiment 1 is as follows: Figure 5-Figure 6The tension component 6 includes a contraction plate 601, which is fixedly connected to the surface of the wheel tube 501. A movable plate 602 is fixedly connected to the left side of the contraction plate 601. Connecting blocks 603 are slidably connected to the inner walls of the movable plate 602. A compression ring 605 is fixedly connected to the bottom of the connecting block 603. The end of the compression ring 605 away from the connecting block 603 is fixedly connected to a table 608. The tension component 6 also includes a junction plate 606, which is fixedly connected to the surface of the rotating shaft 502. A sliding hole 607 is opened on the surface of the junction plate 606. The inner wall of the table 608 and the sliding hole 607 are fixedly connected to each other. Sliding connection, a grab block 609 is fixedly connected to the bottom of the table 608, and the limiting blocks 604 are fixedly connected to the inner walls of the movable plate 602 on both sides. After the molecular membrane is wound, its two ends are fixed on the inner walls of the junction plate 606. After winding, there will be slight wrinkles on both ends of the molecular membrane. At this time, the connection block 603 is pushed to move the table 608 by sliding on the inner wall of the movable plate 602, and the wrinkles on the surface of the molecular membrane are pushed and pulled flat by the grab block 609 at the bottom of the table 608. When the connection block 603 is compressed and bent by the compression ring 605 and moved to the inner wall of the contraction plate 601, the grab block 609 completely flattens the surface of the molecular membrane.

[0021] Embodiment 3: The difference from Embodiment 1 is as follows: Figure 7-Figure 8 The posting component 7 includes a wedge plate 701, including a wedge plate 701 fixedly connected to both sides of the inner wall of the working frame 2, a sliding plate 702 is slidably connected to the bottom of the inner wall of the wedge plate 701, a shift plate 703 is fixedly connected to the top of the slide plate 702, the inner wall of the shift plate 703 is rotatably connected to a hinge ring 706, and a blowing hole 705 is opened on the surface of the hinge ring 706. The surface of the shift plate 703 is rotatably connected to a connecting rod 704, and the connecting rod 704 penetrates the surface of the shift plate 703. The surface of the connecting rod 704 is fixedly connected to a push plate 707, and the end of the push plate 707 away from the connecting rod 704 is fixedly connected to a push ring 708, and the surface of the push ring 708 is fixedly connected to a push pad 709. The posting component 7 also includes a circular plate 710, which is fixedly connected to the surface of the connecting rod 704. An annular hole 711 is provided on the surface of 710, and an air pressure pad 712 is fixedly connected to the bottom of the inner wall of the annular hole 711, and an elastic plate 715 is fixedly connected to the surface of the air pressure pad 712. A compressed air cavity 713 is fixedly connected to the bottom of the inner wall of the circular plate 710, and a jet plate 714 is fixedly connected to the top of the compressed air cavity 713. When the rotating shaft 502 rotates, the push pad 709 is squeezed, and the push plate 707 is driven to rotate on the surface of the connecting rod 704. The push plate 707 drives the circular plate 710 to rotate, and the jet plate 714 contacts the hinge ring 706 to squeeze the elastic plate 715. During the squeezing process, the air pressure pad 712 is contacted, and the gas inside the air pressure pad 712 is ejected from the jet plate 714 to the outside, and finally the gas is ejected outward from the blowing hole 705 to clean the dust on the surface of the molecular membrane.

[0022] 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.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A winding device for producing functional polymer film materials, comprising a bottom plate (1), a working frame (2) being fixedly connected to the top of the bottom plate (1), a triangular plate (3) being fixedly connected to the top of the working frame (2), and the triangular plate (3) being arranged at both ends of the top of the working frame (2), characterized in that: Also includes: The correction component (4) comprises a rotating rod (401) rotatably connected to the surface of the triangular plate (3), a rotating wheel (402) being fixedly connected to the surface of the rotating rod (401), a connecting plate (403) being fixedly connected to the surface of the rotating wheel (402), a compression tube (405) being fixedly connected to the inner wall of the connecting plate (403), and a compression bag (404) being fixedly connected to the bottom of the inner wall of the compression tube (405); The fixing component (5) comprises a wheel tube (501) fixedly connected to the surface of the triangular plate (3), the wheel tube (501) being arranged at the bottom of the rotating rod (401), a rotating shaft (502) being rotatably connected to the bottom of the inner wall of the wheel tube (501), a wedge-shaped groove (503) being provided on the surface of the rotating shaft (502), a lower pressure plate (504) being fixedly connected to the surface of the rotating shaft (502), a slip ring (505) being fixedly connected to the inner wall of the lower pressure plate (504), a tension component (6) being arranged on the surface of the wheel tube (501), and posting components (7) being arranged on both sides of the inner wall of the working frame (2).

2. The winding device for producing functional polymer film materials according to claim 1, characterized in that: The tension component (6) comprises a contraction plate (601), the contraction plate (601) being fixedly connected to the surface of the wheel tube (501), a movable plate (602) being fixedly connected to the left side of the contraction plate (601), connecting blocks (603) being slidably connected to the inner walls of the movable plate (602), a compression ring (605) being fixedly connected to the bottom of the connecting block (603), and a table (608) being fixedly connected to one end of the compression ring (605) away from the connecting block (603).

3. The winding device for producing functional polymer film materials according to claim 1, characterized in that: The posting component (7) comprises a wedge-shaped plate (701), comprising a wedge-shaped plate (701) fixedly connected to both sides of the inner wall of the working frame (2); the bottom of the inner wall of the wedge-shaped plate (701) is slidably connected to a sliding plate (702); the top of the sliding plate (702) is fixedly connected to a displacement plate (703); the inner wall of the displacement plate (703) is rotatably connected to a hinge ring (706); a surface of the hinge ring (706) is provided with a blowing hole (705); the surface of the displacement plate (703) is rotatably connected to a connecting rod (704); the connecting rod (704) penetrates the surface of the displacement plate (703); the surface of the connecting rod (704) is fixedly connected to a pushing plate (707); one end of the pushing plate (707) away from the connecting rod (704) is fixedly connected to a pushing ring (708); and the surface of the pushing ring (708) is fixedly connected to a pushing pad (709).

4. The winding device for producing functional polymer film materials according to claim 1, characterized in that: The correction component (4) further comprises a pressing plate (406), wherein the pressing plate (406) is fixedly connected to the top of the connecting plate (403), and a blowing block (407) is fixedly connected to the top of the connecting plate (403), wherein the blowing block (407) is arranged in the middle of the pressing plate (406).

5. The winding device for producing functional polymer film materials according to claim 1, characterized in that: The fixing component (5) further comprises a sliding block (506), wherein the sliding block (506) is rotatably connected to the inner wall of the lower pressing plate (504), and an end of the sliding block (506) away from the lower pressing plate (504) is fixedly connected to an arc plate (507).

6. The winding device for producing functional polymer film materials according to claim 2, characterized in that: The tension component (6) further comprises a junction plate (606), the junction plate (606) being fixedly connected to the surface of the rotating shaft (502), a sliding hole (607) being provided on the surface of the junction plate (606), the platform (608) being slidably connected to the inner wall of the sliding hole (607), a gripping block (609) being fixedly connected to the bottom of the platform (608), and limiting blocks (604) being fixedly connected to both sides of the inner wall of the movable plate (602).

7. The winding device for producing functional polymer film materials according to claim 3, characterized in that: The posting component (7) further comprises a circular plate (710), wherein the circular plate (710) is fixedly connected to the surface of the connecting rod (704), an annular hole (711) is provided on the surface of the circular plate (710), an air pressure pad (712) is fixedly connected to the bottom of the inner wall of the annular hole (711), an elastic plate (715) is fixedly connected to the surface of the air pressure pad (712), a compressed air cavity (713) is fixedly connected to the bottom of the inner wall of the circular plate (710), and an air jet plate (714) is fixedly connected to the top of the compressed air cavity (713).

8. The winding device for producing functional polymer film materials according to claim 1, characterized in that: The number of the lower pressing plates (504) is set to two, and the two lower pressing plates (504) are symmetrically mounted on the surface of the rotating shaft (502) with the center line of the rotating shaft (502) as the symmetry axis.