A corrugation elimination device for thermoplastic polyurethane film

Abstract

The present invention relates to the technical field of forming and winding of polyurethane films, and specifically to a ripple elimination device for thermoplastic polyurethane films. A fixed frame is provided with three groups of linearly distributed rotatably installed adjustment arc plates on one side close to a fixed bar. The adjustment arc plates slide in contact with the arc-shaped inner wall of an arc groove, and the adjustment arc plates slide through the fixed bar. The three groups of adjustment arc plates are respectively located at the two ends and the middle position of the fixed frame. The fixed bar is provided with an adjustment component that drives the adjustment arc plates to slide along the arc-shaped inner wall of the arc groove. The beneficial effect is that the end of the polyurethane film is fixedly wound and installed by arranging the cooperation of the rotating fixed frame and the fixed roller. When corrugations appear after installation, the angles of the fixed frames on both sides are adjusted to achieve the purpose of eliminating the corrugations. After elimination, the corrugations are straightened by the middle adjustment arc plate, and then the film is wound and wound to ensure that the wound polyurethane film is flat and smooth.

Description

Technical Field

[0001] The invention relates to the technical field of forming and winding polyurethane films, in particular to a ripple elimination device for thermoplastic polyurethane films. Background Art

[0002] PU film is an environmentally friendly material with excellent elasticity and lightness. Despite its extremely thin thickness (0.012-0.035mm), it possesses unparalleled physical properties in terms of waterproofness (withstanding water pressures exceeding 10,000mm). By utilizing advanced technology to introduce a hydrophilic agent into the material, the film not only possesses high waterproof properties but also excellent moisture permeability.

[0003] Thermoplastic polyurethane film is formed by extrusion of molten raw materials. After forming, the thermoplastic polyurethane film gradually forms a stable film through temperature control, and then the film is rolled up to obtain a finished polyurethane film roll.

[0004] In the prior art, stability is usually controlled to eliminate the ripples generated during the polyurethane film forming process. This can only eliminate the ripples in the production process, but ripples will also be generated during the winding process, affecting subsequent use. Since the polyurethane film has a small thickness, high adhesion, and a certain elasticity, it is difficult to achieve accurate fixation of the polyurethane film on the winding roller during the winding process. During the installation process, the polyurethane film is pulled so that the starting end is fixed on the winding roller, and then the film is rotated and wound. However, due to the pulling of the polyurethane film during the installation process, the different traction forces cause the polyurethane film to elastically expand and contract. Once the end of the polyurethane film is fixed on the winding roller and the traction on one side is too large, it will cause tilting and forming wrinkles and ripples. The pulling and straightening cannot eliminate the ripples on the polyurethane film that has been fixed to the winding roller. Winding without eliminating wrinkles and ripples will cause the polyurethane film to fold on each other after winding, forming a folded adhesion layer. Summary of the Invention

[0005] The object of the present invention is to provide a ripple eliminating device for thermoplastic polyurethane film to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A ripple elimination device for thermoplastic polyurethane film, comprising a winding shaft, a winding roller fixedly sleeved on the winding shaft, the winding shaft being driven by a motor, an arcuate groove provided on the arcuate outer wall of the winding roller, an elimination component fitted to the winding roller mounted on the arcuate groove, and a protective cover covering the arcuate groove mounted on the winding roller, the outer diameter of the protective cover being equal to the outer diameter of the winding roller;

[0008] The elimination component includes a fixing frame and a fixing bar, the fixing bar is fixed on the arc-shaped inner wall of the arc-shaped groove, the fixing frame is provided with a rotatably mounted fixing roller for fixing the end of the thermoplastic polyurethane film, and the fixing frame is provided with three groups of linearly distributed rotatably mounted adjustment arc plates on one side close to the fixing bar. The adjustment arc plates slide in accordance with the arc-shaped inner wall of the arc-shaped groove, and the adjustment arc plates slide through the fixing bar. The three groups of adjustment arc plates are respectively located at both ends and the middle position of the fixing frame, and the fixing bar is provided with an adjustment component for driving the adjustment arc plates to slide along the arc-shaped inner wall of the arc-shaped groove.

[0009] Preferably, the winding roller is located on the discharge side of the forming machine, and a lightweight guide roller is vertically installed between the forming machine and the winding roller, which is pressed downward. An extension arm extending toward the winding roller is provided on the outer wall of the forming machine. The lightweight guide roller is rotatably installed on the lifting frame, and the upper end of the lifting frame slides through and is plugged into the extension arm. A spring is pressed between the lifting frame and the extension arm, and the lightweight guide roller is located below the winding roller.

[0010] Preferably, the protective cover is installed in contact with the inner wall of the arc groove, and both ends of the protective cover are provided with end plates for sealing the ports at both ends of the arc groove. The length of the protective cover is smaller than the length of the winding roller, and the end plates are set to be semicircular.

[0011] Preferably, the end plate is provided with multiple groups of mounting holes distributed in a circular array, and the arc-shaped groove is provided with fixed ear seats at both ends of the winding roller. The fixed ear seats are provided with screw holes corresponding to the mounting holes, and the protective cover and the fixed ear seats are fixed by bolts passing through the screw holes and the mounting holes.

[0012] Preferably, an open long groove is provided at the position where the protective cover fits with the end face of the arc groove, and the open long groove connects the inner cavity surrounded by the arc groove and the protective cover. The length of the open long groove is greater than the length of the fixed roller, and the gap width of the open long groove is greater than the thickness of the thermoplastic polyurethane film.

[0013] Preferably, both ends of the fixed roller are rotatably mounted on a fixed frame via bearings, a circular groove is provided on one side of the fixed frame, and a driving component extending through the center of the circular groove is provided at one end of the fixed roller, and the driving component drives the fixed roller to rotate.

[0014] Preferably, the driving component is configured as a turning handle, one end of the turning handle is fixed on a fixed roller, and the other end of the turning handle extends to the front end of the annular groove, and the annular groove is provided with a plurality of groups of positioning holes distributed in a circular array, and a telescopic rod is slidably inserted on the turning handle, and the telescopic rod corresponds to the plurality of groups of positioning holes distributed in a circular array.

[0015] Preferably, a raised layer is provided on the arc outer wall of the fixed roller, the raised layer extends along the length direction of the fixed roller, and a plurality of densely distributed groups of conical protrusions are provided in the raised layer, and the depth of the conical protrusions is greater than the thickness of the thermoplastic polyurethane film.

[0016] Preferably, three groups of rotating seats are provided on the side of the fixing frame close to the fixing bar, one end of the adjusting arc plate is rotatably installed on the rotating seat, a through groove is provided on the fixing bar, the middle section of the adjusting arc plate slides and extends along the through groove, and a detachable limiting end block is provided at the end of the adjusting arc plate, and the thickness of the limiting end block is greater than the height of the through groove.

[0017] Preferably, an arc-shaped tooth plate is provided on the arc-shaped outer wall of the middle section of the adjustment arc plate, and the arc-shaped tooth plate slides through the through groove, and a plurality of adjustment components corresponding to the adjustment arc plates are provided on the fixed bar, and the adjustment components include an adjustment block and an adjustment shaft, and a gear meshing with the arc-shaped tooth plate is provided in the inner cavity of the adjustment block, and an adjustment shaft for driving the gear to rotate is provided on one side of the adjustment block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention realizes fixed winding installation of the end portion of the polyurethane film by arranging the cooperation of a rotating fixing frame and a fixing roller. When corrugations and wrinkles appear after installation, the angles of the fixing frames are adjusted on both sides to eliminate the corrugations. After elimination, the film is straightened by the adjusting arc plate in the middle, and then rolled up and wound, thereby ensuring that the rolled polyurethane film is flat and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the winding structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the elimination component of the present invention;

[0022] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the elimination component of the present invention installed on the fixing bar;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the elimination component of the present invention;

[0025] Figure 6 It is a schematic diagram of the protective cover wrapping the elimination component of the present invention;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the elimination component of the present invention installed on the winding roller;

[0027] Figure 8 This is a schematic diagram of the structure of the elimination component of the present invention being installed on the winding roller.

[0028] In the figure: 1. Forming machine; 2. Winding shaft; 3. Winding roller; 4. Extension arm; 5. Lifting frame; 6. Spring; 7. Light guide roller; 8. Protective cover; 9. Fixed ear seat; 10. Arc groove; 11. Fixed frame; 12. Adjusting arc plate; 13. Arc tooth plate; 14. Fixed bar; 15. Adjusting shaft; 16. Adjusting block; 17. Limiting end block; 18. Fixed roller; 19. Drive assembly; 20. Turning handle; 21. Telescopic rod; 22. Positioning hole; 23. Rotating seat; 24. Raised layer; 25. Through groove; 26. Circular groove; 27. Open long groove; 28. End plate; 29. ​​Mounting hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 8 , the present invention provides a technical solution:

[0031] Example 1: A ripple elimination device for thermoplastic polyurethane film, comprising a winding shaft 2, on which a winding roller 3 is fixedly sleeved, the winding shaft 2 is driven by a motor, the winding roller 3 is located on the discharge side of the forming machine 1, a lightweight guide roller 7 is vertically installed between the forming machine 1 and the winding roller 3 and pressed downward, an extension arm 4 extending toward the winding roller 3 is provided on the outer wall of the forming machine 1, the lightweight guide roller 7 is rotatably installed on the lifting frame 5, the upper end of the lifting frame 5 is slidably inserted into the extension arm 4, a spring 6 is pressed between the lifting frame 5 and the extension arm 4, and the lightweight guide roller 7 is located below the winding roller 3.

[0032] The raw material is extruded into a film by the forming machine 1, and then the film is squeezed downward by the cooperation of the spring 6, the lifting frame 5 and the lightweight guide roller 7 to keep the film taut, and then the film is wound on the winding roller 3.

[0033] An arc groove 10 is provided on the arc outer wall of the winding roller 3, and an elimination component that fits the winding roller 3 is installed on the arc groove 10. A protective cover 8 that wraps the arc groove 10 is installed on the winding roller 3, and the outer diameter of the protective cover 8 is equal to the outer diameter of the winding roller 3. The elimination component includes a fixed frame 11 and a fixed bar 14. The fixed bar 14 is fixed on the arc inner wall of the arc groove 10, and a fixed roller 18 that is rotatably mounted for fixing the end of the thermoplastic polyurethane film is provided on the fixed frame 11. Three groups of rotatably mounted adjustment arc plates 12 are linearly distributed on one side of the fixed frame 11 close to the fixed bar 14. The adjustment arc plates 12 slide in line with the arc inner wall of the arc groove 10, and the adjustment arc plates 12 slide through the fixed bar 14. The three groups of adjustment arc plates 12 are respectively located at both ends and the middle position of the fixed frame 11, and the fixed bar 14 is provided with an adjustment component that drives the adjustment arc plate 12 to slide along the arc inner wall of the arc groove 10.

[0034] Before winding, the end of the thermoplastic polyurethane film needs to be fixed on the winding roller 3, and it is necessary to ensure that the thermoplastic polyurethane film remains flat and smooth after being fixed on the winding roller 3.

[0035] The fixed roller 18 is provided to achieve fixed winding of the end of the thermoplastic polyurethane film. When corrugations appear, the adjusting arc plates 12 on both sides are driven to slide by the adjusting component, thereby adjusting the inclination angles of the two ends of the fixing frame 11 to achieve the purpose of further pulling the thermoplastic polyurethane film, thereby eliminating the corrugations. Then, the middle position adjusting arc plate 12 and the adjusting arc plates 12 on both sides are controlled to move together to achieve the purpose of straightening.

[0036] Working principle: Before the thermoplastic polyurethane film is wound and rolled up, it is necessary to manually pull the end of the thermoplastic polyurethane film and fix its end on the outer wall of the fixed roller 18. The end is wound and fixed by the rotation of the fixed roller 18. At this time, due to the different traction forces, it is difficult to ensure the flatness and smoothness of the thermoplastic polyurethane film. Then, by driving the adjustment arc plates 12 on both sides, the fixed frame 11 is rotated and deflected along the middle position, thereby adjusting the traction force to eliminate wrinkles and ripples in the thermoplastic polyurethane film. Then, the middle position adjustment arc plate 12 and the adjustment arc plates 12 on both sides are controlled to move together to achieve the purpose of straightening. Finally, the protective cover 8 is installed, and the thermoplastic polyurethane film is wound and rolled up by the winding roller 3.

[0037] Example 2: On the basis of Example 1, in order to protect the arc groove 10 and ensure the stability of winding, the protective cover 8 is installed in contact with the inner wall of the arc groove 10, and both ends of the protective cover 8 are provided with end plates 28 for sealing the ports at both ends of the arc groove 10. The length of the protective cover 8 is less than the length of the winding roller 3, and the end plate 28 is set to a semicircular ring shape.

[0038] The arc groove 10 is filled by providing the protective cover 8 to ensure the consistency of the winding radius.

[0039] The end plate 28 is provided with a plurality of mounting holes 29 distributed in a circumferential array. Fixed ear seats 9 are provided at both ends of the arc groove 10 located at the winding roller 3. The fixed ear seats 9 are provided with screw holes corresponding to the mounting holes 29. The protective cover 8 and the fixed ear seats 9 are fixed by bolts passing through the screw holes and the mounting holes 29. An open long groove 27 is provided at the position where the protective cover 8 and the end face of the arc groove 10 are in contact. The open long groove 27 connects the inner cavity surrounded by the arc groove 10 and the protective cover 8. The length of the open long groove 27 is greater than the length of the fixed roller 18, and the gap width of the open long groove 27 is greater than the thickness of the thermoplastic polyurethane film.

[0040] The thermoplastic polyurethane film is extended to the inner cavity of the arc groove 10 by providing the open long groove 27 , and the protective cover 8 is fixedly installed on the winding roller 3 by using the fixing ear seat 9 .

[0041] Example 3: Based on Example 2, in order to control the angle of the fixed roller 18 after winding and avoid the reversal and release of the end fixation caused by the traction of the thermoplastic polyurethane film, the two ends of the fixed roller 18 are rotatably mounted on the fixed frame 11 through bearings. A circular groove 26 is provided on one side of the fixed frame 11. A driving component 19 extending through the center of the circular groove 26 is provided at one end of the fixed roller 18. The driving component 19 drives the fixed roller 18 to rotate. The driving component 19 is set as a rotating handle 20. One end of the rotating handle 20 is fixed to the fixed frame 11. On the fixed roller 18, the other end of the rotating handle 20 extends to the front end of the annular groove 26. The annular groove 26 is provided with a plurality of positioning holes 22 distributed in a circumferential array. A telescopic plug-in rod 21 is slidably inserted into the rotating handle 20. The telescopic plug-in rod 21 corresponds to the plurality of positioning holes 22 distributed in a circumferential array. A raised layer 24 is provided on the arc outer wall of the fixed roller 18. The raised layer 24 extends along the length direction of the fixed roller 18, and a plurality of densely distributed conical protrusions are provided in the raised layer 24. The depth of the conical protrusion is greater than the thickness of the thermoplastic polyurethane film.

[0042] By providing the raised layer 24, when manually installing the end of the thermoplastic polyurethane film on the fixed roller 18, the end of the thermoplastic polyurethane film is first pressed against the raised layer 24 to form an initial fixation of the puncture, and then the fixed roller 18 is rotated by the turning handle 20, so that the film is wrapped around the fixed roller 18 to achieve winding fixation, and then the telescopic insertion rod 21 is inserted into the positioning hole 22 to limit the further rotation of the fixed roller 18, thereby preventing it from rotating in the opposite direction, and achieving the fixation of the end of the thermoplastic polyurethane film.

[0043] Example 4: Based on Example 3, three groups of rotating seats 23 are provided on the side of the fixing frame 11 close to the fixing bar 14, one end of the adjusting arc plate 12 is rotatably installed on the rotating seat 23, and a through groove 25 is provided on the fixing bar 14. The middle section of the adjusting arc plate 12 slides and extends along the through groove 25, and a detachable limiting end block 17 is provided at the end of the adjusting arc plate 12, and the thickness of the limiting end block 17 is greater than the height of the through groove 25.

[0044] The rotating seat 23 is provided to realize the rotation connection between the adjusting arc plate 12 and the fixing frame 11 , and the limiting end block 17 is used to limit the position of one end of the adjusting arc plate 12 to prevent it from being separated from the fixing bar 14 .

[0045] An arc-shaped tooth plate 13 is provided on the arc-shaped outer wall of the middle section of the adjustment arc plate 12, and the arc-shaped tooth plate 13 slides through the through groove 25, and a plurality of adjustment components corresponding to the adjustment arc plate 12 are provided on the fixed bar 14. The adjustment component includes an adjustment block 16 and an adjustment shaft 15. A gear meshing with the arc-shaped tooth plate 13 is provided in the inner cavity of the adjustment block 16, and an adjustment shaft 15 for driving the gear to rotate is provided on one side of the adjustment block 16.

[0046] During the adjustment process, by rotating the adjustment shaft 15, the gear inside the adjustment block 16 is driven to rotate, and the meshing transmission between the gear and the arc-shaped toothed plate 13 is utilized to drive the adjustment arc plate 12 to rotate along the inner wall of the arc-shaped groove 10, thereby achieving the purpose of pulling the fixed frame 11 at one end, causing the fixed roller 18 to be pulled and deflected to one side, thereby achieving the purpose of tightening and flattening.

[0047] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A ripple elimination device for thermoplastic polyurethane film, comprising a winding shaft (2), a winding roller (3) fixedly sleeved on the winding shaft (2), and the winding shaft (2) is driven by a motor, characterized in that: An arc-shaped groove (10) is provided on the arc outer wall of the winding roller (3), an elimination component that fits the winding roller (3) is installed on the arc-shaped groove (10), and a protective cover (8) that wraps the arc-shaped groove (10) is installed on the winding roller (3), and the outer diameter of the protective cover (8) is equal to the outer diameter of the winding roller (3); The elimination component includes a fixing frame (11) and a fixing bar (14), wherein the fixing bar (14) is fixed on the arc-shaped inner wall of the arc-shaped groove (10), and a rotatably mounted fixing roller (18) for fixing the end of the thermoplastic polyurethane film is provided on the fixing frame (11). Three groups of linearly distributed rotatably mounted adjustment arc plates (12) are provided on one side of the fixing frame (11) close to the fixing bar (14). The adjustment arc plates (12) slide along the arc-shaped inner wall of the arc-shaped groove (10), and the adjustment arc plates (12) slide through the fixing bar (14). The three groups of adjustment arc plates (12) are respectively located at both ends and the middle position of the fixing frame (11), and an adjustment component for driving the adjustment arc plates (12) to slide along the arc-shaped inner wall of the arc-shaped groove (10) is provided on the fixing bar (14); The fixing frame (11) is provided with three sets of rotating seats (23) on one side close to the fixing bar (14), one end of the adjusting arc plate (12) is rotatably mounted on the rotating seat (23), the fixing bar (14) is provided with a through slot (25), the middle section of the adjusting arc plate (12) slides and extends along the through slot (25), and the end of the adjusting arc plate (12) is provided with a detachable limiting end block (17), the thickness of the limiting end block (17) is greater than the height of the through slot (25); the adjusting arc plate ( An arc-shaped tooth plate (13) is provided on the arc-shaped outer wall of the middle section of the adjusting arc plate (12), and the arc-shaped tooth plate (13) slides through the through groove (25), and a plurality of adjustment components corresponding to the adjustment arc plates (12) are provided on the fixing bar (14), and the adjustment components include an adjustment block (16) and an adjustment shaft (15), and a gear meshing with the arc-shaped tooth plate (13) is provided in the inner cavity of the adjustment block (16), and an adjustment shaft (15) for driving the gear to rotate is provided on one side of the adjustment block (16).

2. The device for eliminating ripples in thermoplastic polyurethane film according to claim 1, characterized in that: The winding roller (3) is located on the discharge side of the forming machine (1), and a light guide roller (7) is vertically installed between the forming machine (1) and the winding roller (3) and is pressed downward. An extension arm (4) extending toward the winding roller (3) is provided on the outer wall of the forming machine (1), and the light guide roller (7) is rotatably installed on the lifting frame (5). The upper end of the lifting frame (5) slides through and is inserted into the extension arm (4). A spring (6) is pressed between the lifting frame (5) and the extension arm (4), and the light guide roller (7) is located below the winding roller (3).

3. The device for eliminating ripples in thermoplastic polyurethane film according to claim 2, characterized in that: The protective cover (8) is installed in contact with the inner wall of the arc groove (10), and end plates (28) are provided at both ends of the protective cover (8) for sealing the ports at both ends of the arc groove (10). The length of the protective cover (8) is less than the length of the winding roller (3), and the end plates (28) are arranged in a semicircular ring shape.

4. The device for eliminating ripples in thermoplastic polyurethane film according to claim 3, characterized in that: The end plate (28) is provided with a plurality of mounting holes (29) distributed in a circumferential array. The arc groove (10) is provided with fixed ear seats (9) at both ends of the winding roller (3). The fixed ear seats (9) are provided with screw holes corresponding to the mounting holes (29). The protective cover (8) and the fixed ear seats (9) are fixed by bolts passing through the screw holes and the mounting holes (29).

5. The device for eliminating ripples in thermoplastic polyurethane film according to claim 4, characterized in that: An open long groove (27) is provided at a position where the protective cover (8) and the end surface of the arc groove (10) are in contact with each other. The open long groove (27) is connected to the inner cavity surrounded by the arc groove (10) and the protective cover (8). The length of the open long groove (27) is greater than the length of the fixed roller (18), and the gap width of the open long groove (27) is greater than the thickness of the thermoplastic polyurethane film.

6. The device for eliminating ripples in thermoplastic polyurethane film according to claim 2, characterized in that: Both ends of the fixed roller (18) are rotatably mounted on the fixed frame (11) via bearings. A circular groove (26) is provided on one side of the fixed frame (11). A driving component (19) extending through the center of the circular groove (26) is provided at one end of the fixed roller (18). The driving component (19) drives the fixed roller (18) to rotate.

7. The device for eliminating ripples in thermoplastic polyurethane film according to claim 6, characterized in that: The driving assembly (19) is configured as a rotating handle (20), one end of the rotating handle (20) is fixed on the fixed roller (18), and the other end of the rotating handle (20) extends to the front end of the annular groove (26), and the annular groove (26) is provided with a plurality of positioning holes (22) distributed in a circumferential array. A telescopic plug (21) is slidably plugged into the rotating handle (20), and the telescopic plug (21) corresponds to the plurality of positioning holes (22) distributed in the circumferential array.

8. The device for eliminating ripples in thermoplastic polyurethane film according to claim 7, characterized in that: A raised layer (24) is provided on the arc outer wall of the fixed roller (18), the raised layer (24) extends along the length direction of the fixed roller (18), and a plurality of densely distributed groups of conical protrusions are provided in the raised layer (24), and the depth of the conical protrusions is greater than the thickness of the thermoplastic polyurethane film.

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