Ripple eliminating device for thermoplastic polyurethane film

Abstract

The invention relates to the technical field of forming and rolling of polyurethane films, in particular to a ripple eliminating device for a thermoplastic polyurethane film, and is characterized in that three groups of adjusting arc plates which are linearly distributed and rotationally mounted are arranged on one side, close to a fixing strip, of a fixing frame, the adjusting arc plates slide in a manner of being attached to the arc-shaped inner wall of an arc-shaped groove, and the adjusting arc plates slidably penetrate through the fixing strip; and the three sets of adjusting arc plates are located at the two ends and the middle position of the fixing frame correspondingly, and adjusting assemblies for driving the adjusting arc plates to slide along the arc-shaped inner walls of the arc-shaped grooves are arranged on the fixing strips. When corrugations and wrinkles appear after installation, the purpose of eliminating the corrugations is achieved by adjusting the angles of the fixing frames on the two sides, after the corrugations are eliminated, straightening is achieved through the adjusting arc plate in the middle, then rolling and winding are conducted, and it is guaranteed that the rolled polyurethane film is flat and smooth.

Description

Technical Field

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

[0002] PU film is an environmentally friendly material. It has good elasticity and high lightness. Although it is extremely thin (0.012-0.035mm) in waterproofness, it has physical properties that other materials cannot match (it can withstand water pressure above 10000mm water column). High-tech technology is used to introduce hydrophilic agents into the material, so that the film has not only high waterproof performance but also excellent moisture permeability.

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

[0004] In the prior art, the ripples generated during the forming process of the polyurethane film are usually controlled to be stable so as to eliminate the ripples. This can only eliminate the ripples in the production, but ripples will also be generated during the winding process, affecting the 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, during the installation process, the pulling of the polyurethane film causes different traction forces, causing the polyurethane film to elastically expand and contract. Once the end of the polyurethane film is fixed on the winding roller and causes one side to be pulled too much, it will cause inclination to form wrinkled 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 elimination 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: A corrugation elimination device for thermoplastic polyurethane film, comprising a winding shaft, a winding roller is fixedly sleeved on the winding shaft, the winding shaft is driven by a motor, an arc groove is arranged on the arc outer wall of the winding roller, an elimination component fitting the winding roller is installed on the arc groove, a protective cover covering the arc groove is installed on the winding roller, and the outer diameter of the protective cover is equal to the outer diameter of the winding roller; 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 adjusting arc plates on one side close to the fixing bar, the adjusting arc plates slide in contact with the arc-shaped inner wall of the arc-shaped groove, and the adjusting arc plates slide through the fixing bar, the three groups of adjusting arc plates are respectively located at the two ends and the middle position of the fixing frame, and the fixing bar is provided with an adjusting component for driving the adjusting arc plates to slide along the arc-shaped inner wall of the arc-shaped groove.

[0007] Preferably, the winding roller is located on the discharge side of the forming machine, and a lightweight guide roller pressed downward is vertically installed between the forming machine and the winding roller. 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 inserted 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.

[0008] 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 plate is set in a semicircular ring shape.

[0009] Preferably, the end plate is provided with a plurality of mounting holes distributed in a circular array, and fixed ear seats are provided at both ends of the arc groove at the winding roller, and screw holes corresponding to the mounting holes are provided on the fixed ear seats, and the protective cover is fixed to the fixed ear seat by bolts passing through the screw holes and the mounting holes.

[0010] Preferably, an open long groove is provided at the position where the protective cover fits with the end surface of the arc groove, 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.

[0011] 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.

[0012] Preferably, the driving assembly is configured as a turning handle, one end of which is fixed on a fixed roller, and the other end of which 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.

[0013] Preferably, a protrusion layer is provided on the arc outer wall of the fixed roller, the protrusion layer extends along the length direction of the fixed roller, and a plurality of densely distributed groups of conical protrusions are provided in the protrusion layer, and the depth of the conical protrusions is greater than the thickness of the thermoplastic polyurethane film.

[0014] Preferably, three groups of rotating seats are provided on one side of the fixing frame close to the fixing bar, one end of the adjusting arc plate is rotatably mounted 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.

[0015] Preferably, an arc-shaped tooth plate is provided on the arc-shaped outer wall of the middle section of the adjusting arc plate, and the arc-shaped tooth plate slides through the through groove, and a plurality of adjustment components corresponding to the adjusting 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes fixed winding installation of the end of the polyurethane film by arranging the cooperation of the rotating fixed frame and the fixed roller. When corrugations and wrinkles appear after installation, the angles of the fixed frames are adjusted on both sides to achieve the purpose of eliminating the corrugations. After elimination, the film is straightened by the middle adjusting arc plate, and then rolled and wound to ensure that the rolled polyurethane film is flat and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the winding structure of the present invention; Figure 2 It is a schematic diagram of the structure of the elimination component of the present invention; Figure 3 for Figure 2 A magnified view of the structure at center; Figure 4 It is a schematic diagram of a three-dimensional structure in which the elimination component of the present invention is installed on a fixing bar; Figure 5 It is a schematic diagram of the three-dimensional structure of the elimination component of the present invention; Figure 6 It is a schematic diagram of the wrapping structure of the protective cover of the present invention to the elimination component; Figure 7 It is a schematic diagram of a three-dimensional structure in which the elimination component of the present invention is installed on a winding roller; Figure 8 This is a schematic diagram of the structure of installing the elimination component of the present invention on the winding roller.

[0018] 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. adjustment arc plate; 13. arc tooth plate; 14. fixed bar; 15. adjustment shaft; 16. adjustment block; 17. limit end block; 18. fixed roller; 19. driving assembly; 20. turning handle; 21. telescopic plug 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

[0019] 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.

[0020] See also Figures 1 to 8 , the present invention provides a technical solution: Embodiment 1: A ripple elimination device for a 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 molding machine 1, a lightweight guide roller 7 is vertically installed between the molding 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 molding machine 1, the lightweight guide roller 7 is rotatably installed on a 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.

[0021] The raw material is extruded into a film by the forming machine 1 , and then the film is extruded downward by the cooperation of the spring 6 , the lifting frame 5 and the light guide roller 7 , the film is kept taut, and then the film is wound on the winding roller 3 .

[0022] 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. A fixed roller 18 that is rotatably installed for fixing the end of the thermoplastic polyurethane film is provided on the fixed frame 11. Three groups of rotatably installed 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 contact 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. 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.

[0023] 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 after the thermoplastic polyurethane film is fixed on the winding roller 3, the thermoplastic polyurethane film remains flat and smooth.

[0024] The fixed roller 18 is provided to realize the 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, so as to adjust the inclination angles at both ends of the fixing frame 11, so as to achieve the purpose of further pulling the thermoplastic polyurethane film, thereby eliminating the corrugations, and then the adjusting arc plate 12 in the middle position is controlled to move together with the adjusting arc plates 12 on both sides to achieve the purpose of straightening.

[0025] Working principle: Before the thermoplastic polyurethane film is wound and rolled, it is necessary to manually pull the end of the thermoplastic polyurethane film and fix the 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, it is difficult to ensure the flatness and smoothness of the thermoplastic polyurethane film due to the different traction forces. Then, by driving the adjusting 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 adjusting arc plate 12 in the middle position and the adjusting 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 by winding the winding roller 3.

[0026] 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.

[0027] The arc groove 10 is filled by providing the protective cover 8 to ensure the consistency of the winding radius.

[0028] 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 is fixed to the fixed ear seats 9 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 surface 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.

[0029] 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 fixed ear seat 9 .

[0030] Embodiment 3: On the basis of Embodiment 2, in order to realize the control of the angle of the fixed roller 18 after winding, and to 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, and 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, and 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, and the annular groove 26 is provided with a plurality of positioning holes 22 distributed in a circular array. A telescopic plug 21 is slidably inserted into the rotating handle 20, and the telescopic plug 21 corresponds to the plurality of positioning holes 22 distributed in the circular array. A protrusion layer 24 is provided on the arc outer wall of the fixed roller 18, and the protrusion layer 24 extends along the length direction of the fixed roller 18, and a plurality of densely distributed conical protrusions are provided in the protrusion layer 24, and the depth of the conical protrusion is greater than the thickness of the thermoplastic polyurethane film.

[0031] 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 wound 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, thereby achieving the end fixation of the thermoplastic polyurethane film.

[0032] Embodiment 4: Based on Embodiment 3, three groups of rotating seats 23 are provided on one 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, 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.

[0033] The rotating seat 23 is provided to realize the rotation connection between the adjusting arc plate 12 and the fixing frame 11 , and the position of one end of the adjusting arc plate 12 is limited by the limiting end block 17 to avoid separation from the fixing bar 14 .

[0034] An arc-shaped tooth plate 13 is arranged 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 adjusting arc plate 12 are arranged 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 arranged in the inner cavity of the adjustment block 16, and an adjustment shaft 15 for driving the gear to rotate is arranged on one side of the adjustment block 16.

[0035] During the adjustment process, the adjusting shaft 15 is rotated to drive the gear inside the adjusting block 16 to rotate, and the meshing transmission between the gear and the arc-shaped toothed plate 13 is utilized to drive the adjusting arc plate 12 to rotate along the inner wall of the arc-shaped groove 10, so as to achieve the purpose of pulling the fixed frame 11 at one end, so that the fixed roller 18 is pulled and deflected to one side, so as to achieve the purpose of tightening and flattening.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ripple elimination device for a thermoplastic polyurethane film, comprising a winding shaft (2), a winding roller (3) being fixedly sleeved on the winding shaft (2), the winding shaft (2) being driven by a motor, and 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 comprises 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 the fixing frame (11) is provided with a fixing roller (18) which is rotatably mounted and used to fix the end of the thermoplastic polyurethane film. A side of the fixing frame (11) close to the fixing bar (14) is provided with three groups of linearly distributed rotatably mounted adjusting arc plates (12), wherein the adjusting arc plates (12) slide in contact with the arc-shaped inner wall of the arc-shaped groove (10), and the adjusting arc plates (12) slide through the fixing bar (14), and the three groups of adjusting arc plates (12) are respectively located at the two ends and the middle position of the fixing frame (11), and the fixing bar (14) is provided with an adjusting component which drives the adjusting arc plates (12) to slide along the arc-shaped inner wall of the arc-shaped groove (10).

2. The ripple elimination device for 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); a light guide roller (7) pressed downward is vertically installed between the forming machine (1) and the winding roller (3); an extension arm (4) extending toward the winding roller (3) is arranged on the outer wall of the forming machine (1); the light 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 light guide roller (7) is located below the winding roller (3).

3. The ripple elimination device for 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-shaped groove (10), and end plates (28) for sealing the ports at both ends of the arc-shaped groove (10) are provided at both ends of the protective cover (8). 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 ripple elimination device for thermoplastic polyurethane film according to claim 3, characterized in that: The end plate (28) is provided with a plurality of groups of mounting holes (29) distributed in a circumferential array, and the arc-shaped groove (10) is provided with fixing ear seats (9) at both ends of the winding roller (3), and the fixing ear seats (9) are provided with screw holes corresponding to the mounting holes (29), and the protective cover (8) and the fixing ear seats (9) are fixed by bolts penetrating the screw holes and the mounting holes (29).

5. The device for eliminating ripples of thermoplastic polyurethane film according to claim 4, characterized in that: An open long groove (27) is provided at a position where the end surfaces of the protective cover (8) and the arc-shaped groove (10) are in contact with each other. The open long groove (27) is connected to an inner cavity surrounded by the arc-shaped 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 ripple elimination device for thermoplastic polyurethane film according to claim 2, characterized in that: Both ends of the fixed roller (18) are rotatably mounted on a fixed frame (11) via bearings; a circular groove (26) is provided on one side of the fixed frame (11); and a driving component (19) extending through the center of the circular groove (26) is provided on one end of the fixed roller (18); the driving component (19) drives the fixed roller (18) to rotate.

7. The ripple elimination device for 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), the other end of the rotating handle (20) extends to the front end of the circular groove (26), the circular groove (26) is provided with a plurality of groups of positioning holes (22) distributed in a circumferential array, a telescopic plug rod (21) is slidably plugged into the rotating handle (20), and the telescopic plug rod (21) corresponds to the plurality of groups of positioning holes (22) distributed in a circumferential array.

8. The device for eliminating ripples of 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 groups of densely distributed conical protrusions are provided in the raised layer (24), the depth of the conical protrusions being greater than the thickness of the thermoplastic polyurethane film.

9. The device for eliminating ripples of thermoplastic polyurethane film according to claim 8, characterized in that: Three groups of rotating seats (23) are arranged on one side of the fixing frame (11) close to the fixing bar (14); one end of the adjusting arc plate (12) is rotatably mounted on the rotating seat (23); a through groove (25) is arranged on the fixing bar (14); a middle section of the adjusting arc plate (12) slides and extends along the through groove (25); a detachable limiting end block (17) is arranged at the end of the adjusting arc plate (12); the thickness of the limiting end block (17) is greater than the height of the through groove (25).

10. The device for eliminating ripples of thermoplastic polyurethane film according to claim 9, characterized in that: An arc-shaped tooth plate (13) is arranged 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). A plurality of adjusting components corresponding to the adjusting arc plates (12) are arranged on the fixing bar (14), and the adjusting components include an adjusting block (16) and an adjusting shaft (15). A gear meshing with the arc-shaped tooth plate (13) is arranged in the inner cavity of the adjusting block (16), and an adjusting shaft (15) for driving the gear to rotate is arranged on one side of the adjusting block (16).

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