TPU film trimming machine
By designing a TPU film edge-cutting machine with flattening and cutting components, the problems of wrinkles and irregular serrations in the film during the cutting process are solved, ensuring the flatness of the film and the quality of the finished product.
Patent Information
- Application Number
- CN202521378018.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-02
AI Technical Summary
Traditional TPU film cutting devices cannot effectively flatten the film edges when cutting them, resulting in wrinkles and irregular jagged edges on the film during transport, which affects the quality of the finished product.
A TPU film edge trimming machine was designed, comprising a flattening component and a cutting component. The film is flattened using pressure rollers and a conveyor belt, and the film edge is trimmed by the cooperation of a cutter and a support plate, ensuring that the film remains flat during the trimming process.
This method achieves flatness of the film during the cutting process, improves the quality of the finished film, and avoids the occurrence of wrinkles and irregular jagged edges.
Smart Images
Figure CN224675018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of TPU film edge cutting, specifically a TPU film edge cutting machine. Background Technology
[0002] TPU film is a film made from TPU granules through special processes such as calendering, casting, blown film, and coating. During the extrusion process, the molten TPU material may cause thickening, burrs, or wavy deformation at the film edge due to differences in flow rate or cooling shrinkage at the mold exit (known as "ear flow"). Edge trimming can remove these irregular parts and ensure that the overall thickness of the film is uniform. However, because traditional film trimming devices do not have corresponding flattening treatment when cutting the film edge, wrinkles may appear in the film during the conveying process. If the trimming device cuts off the wrinkled areas, the film edge will appear irregularly serrated, affecting the final product quality of the film. Utility Model Content
[0003] The purpose of this invention is to provide a TPU film edge cutting machine to overcome the above-mentioned defects in the prior art.
[0004] A TPU film edge-cutting machine according to the present invention includes: The base has two upright plates symmetrically arranged front and back fixed to its upper surface. The flattening assembly has two components arranged symmetrically vertically. The flattening assembly is located on the upper side of the base and between two upright plates. The flattening assembly includes two connecting plates arranged symmetrically front and rear. Two pressure rollers are rotatably connected between the two connecting plates. A first conveyor belt is poweredly connected between the two pressure rollers. Second conveyor belts are arranged on both the front and rear sides of the first conveyor belt. The second conveyor belts are poweredly connected between the two pressure rollers. The second conveyor belts and the first conveyor belts are spaced apart. The TPU film is flattened by the first conveyor belts on the upper and lower sides and the second conveyor belts on the upper and lower sides. The cutting assembly has two components, each located within a flattening assembly. Each cutting assembly includes two sliding seats slidably connected to connecting plates on corresponding sides. A drive shaft is rotatably connected between the two sliding seats. Two symmetrically arranged cutters are fixed on the outer periphery of the upper drive shaft, and two symmetrically arranged support discs are fixed on the outer periphery of the lower drive shaft. The outer periphery of the cutters abuts against the outer periphery of the support discs. The outer periphery of the cutters and the support discs are embedded in the gap between the second conveyor belt and the first conveyor belt. By abutting against the outer periphery of the support discs, the edge of the film passing between the cutters and the support discs is cut off.
[0005] Preferably, two symmetrical retaining rings are fixed on the outer periphery of the pressure roller. The retaining rings are used to separate the limiting ring and the first conveyor belt, so that the gap between the limiting ring and the first conveyor belt remains unchanged.
[0006] Preferably, two symmetrically positioned retaining rings are fixed on the outer periphery of the pressure roller, with the two retaining rings located between the two retaining rings, and the second conveyor belt located between the retaining rings and the adjacent retaining rings.
[0007] Preferably, two symmetrical threaded blocks are fixed on the side of the connecting plate away from the pressure roller. A fixing plate is fixed at the upper end of the upright plate. The fixing plate is located between the upper and lower threaded blocks. A screw rod is rotatably connected inside the fixing plate, passing through the upper and lower threaded blocks respectively. The screw rod is threadedly connected to the threaded blocks. The threads of the upper and lower threaded blocks rotate in opposite directions.
[0008] Preferably, the connecting plate has a guide block corresponding to the sliding seat fixed on the side near the pressure roller. The sliding seat has a guide groove that runs through it from front to back. The guide block passes through the guide groove and is slidably connected to it. A second spring seat is fixed on the guide block. An annular connecting seat is fixed on the sliding seat. The annular connecting seat is located between the upper and lower second spring seats. The two ends of the drive shaft are rotatably connected to the annular connecting seats on the front and back sides, respectively. A first spring seat is fixed on the sliding seat. The second spring seat is located between the upper and lower first spring seats. A compression spring is fixed between the first spring seat and the second spring seat.
[0009] Preferably, two symmetrical bushings are fitted on the outer periphery of the drive shaft. The bushings are threaded with fastening bolts perpendicular to the axis of the drive shaft. The fastening bolts abut against the outer periphery of the drive shaft, so that the bushings are fixed on the outer periphery of the drive shaft. The cutter is fixed on the outer periphery of the upper bushing, and the support plate is fixed on the outer periphery of the lower bushing.
[0010] The beneficial effects of this utility model are: by rotating the pressure roller, the first conveyor belt and the second conveyor belt are driven to rotate, thereby realizing the conveying and flattening of the film at the same time. The cutter and the support plate are set in the interval between the first conveyor belt and the second conveyor belt. The cutter abuts against the outer periphery of the support plate, thereby cutting off the edge of the film passing between the cutter and the support plate. The flattening component ensures that the film can remain flat during the cutting process, ensuring the quality of the final film product. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a utility model Figure 2A cross-sectional view along the AA direction; Figure 4 This is a utility model Figure 3 Enlarged view of point D; Figure 5 This is a utility model Figure 2 Cross-sectional view along the BB direction; Figure 6 This is a utility model Figure 2 A cross-sectional view along the CC direction; Figure 7 This is a utility model Figure 6 Enlarged diagram of point E in the middle.
[0012] In the picture: 10. Base; 11. Vertical plate; 12. Fixed plate; 20. Connecting plate; 21. Threaded block; 22. Screw; 23. Handle; 30. Pressure roller; 31. Limiting ring; 32. Retaining ring; 40. First conveyor belt; 41. Second conveyor belt; 50. Drive shaft; 51. Cutter; 52. Bushing; 53. Support plate; 54. Fastening bolt; 60. Sliding seat; 61. Annular connecting seat; 62. Guide block; 63. Guide groove; 64. First spring seat; 65. Compression spring; 66. Second spring seat. Detailed Implementation
[0013] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are merely simplified descriptions for the convenience of describing this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. As used herein, terms before and after are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors. The specific features of this TPU film edge-cutting machine are described in detail below: One embodiment of this utility model: Reference Figures 1-7 This utility model provides a TPU film edge cutting machine, including a base 10, a flattening component and a cutting component; Two upright plates 11 are fixed to the upper surface of the base 10, arranged symmetrically front to back; Two flattening components are provided and arranged symmetrically from top to bottom. The flattening components are located on the upper side of the base 10 and between the two upright plates 11. The flattening components include two connecting plates 20 arranged symmetrically from front to back. Two symmetrical 33s are rotatably connected between the two connecting plates 20. Pressure rollers 30 are fixed on the outer periphery of the 33. A motor is fixed on one of the connecting plates 20, and the corresponding 33 is fixedly connected to the output shaft of the motor. A first conveyor belt 40 is poweredly connected between the two pressure rollers 30. A second conveyor belt 41 is provided on both the front and rear sides of the first conveyor belt 40. The second conveyor belt 41 is poweredly connected between the two pressure rollers 30 and forms a gap between the second conveyor belt 41 and the first conveyor belt 40. The TPU film is flattened by the first conveyor belt 40 on the upper and lower sides and the second conveyor belt 41 on the upper and lower sides. Two cutting components are provided and located within two flattening components respectively. The cutting components include two sliding seats 60, which are slidably connected to the connecting plates 20 on the corresponding sides. A drive shaft 50 is rotatably connected between the two sliding seats 60. Two symmetrical cutters 51 are fixed on the outer periphery of the upper drive shaft 50, and two symmetrically arranged support disks 53 are fixed on the outer periphery of the lower drive shaft 50. The outer periphery of the cutter 51 abuts against the outer periphery of the support disk 53. The outer periphery of the cutter 51 and the outer periphery of the support disk 53 are embedded in the gap between the second conveyor belt 41 and the first conveyor belt 40. By the cutter 51 abutting against the outer periphery of the support disk 53, the edge of the film passing between the cutter 51 and the support disk 53 is cut off.
[0015] Two symmetrical retaining rings 32 are fixed on the outer periphery of the pressure roller 30. The retaining rings 32 are used to separate the limiting ring 31 and the first conveyor belt 40, so that the gap between the limiting ring 31 and the first conveyor belt 40 remains unchanged.
[0016] Two symmetrical limiting rings 31 are fixed on the outer periphery of the pressure roller 30, and two retaining rings 32 are located between the two limiting rings 31. The second conveyor belt 41 is located between the limiting rings 31 and the adjacent retaining rings 32.
[0017] Two symmetrical threaded blocks 21 are fixed on the side of the connecting plate 20 away from the pressure roller 30. A fixing plate 12 is fixed on the upper end of the upright plate 11. The fixing plate 12 is located between the upper and lower threaded blocks 21. A screw 22 is rotatably connected inside the fixing plate 12, which passes through the upper and lower threaded blocks 21 respectively. A handle 23 is fixed on the upper end of the screw 22. The screw 22 is threadedly connected to the threaded blocks 21. The threads of the upper and lower threaded blocks 21 rotate in opposite directions.
[0018] A guide block 62 corresponding to the sliding seat 60 is fixed on the side of the connecting plate 20 near the pressure roller 30. The sliding seat 60 has a guide groove 63 that runs through it from front to back. The guide block 62 passes through the guide groove 63 and is slidably connected to it. A second spring seat 66 is fixed on the guide block 62. An annular connecting seat 61 is fixed on the sliding seat 60. The annular connecting seat 61 is located between the upper and lower second spring seats 66. The two ends of the drive shaft 50 are rotatably connected to the annular connecting seats 61 on the front and rear sides, respectively. A first spring seat 64 is fixed on the sliding seat 60. The second spring seat 66 is located between the upper and lower first spring seats 64. A compression spring 65 is fixed between the first spring seat 64 and the second spring seat 66.
[0019] Two symmetrical bushings 52 are fitted on the outer periphery of the drive shaft 50. The bushings 52 are threaded with fastening bolts 54 perpendicular to the axis of the drive shaft 50. The bushings 52 are fixed to the outer periphery of the drive shaft 50 by the fastening bolts 54 abutting against the outer periphery of the drive shaft 50. The cutter 51 is fixed to the outer periphery of the upper bushing 52, and the support plate 53 is fixed to the outer periphery of the lower bushing 52.
[0020] When using this invention, it is installed on a TPU film production line. The film is fed in from one side of the first conveyor belt 40. The four handles 23 are rotated to adjust the spacing between the upper and lower flattening components, thereby pressing the film tightly on the upper and lower first conveyor belts 40.
[0021] At this time, the motor is started, which drives the 33 on the corresponding side to rotate, thereby causing the pressure roller 30 on the corresponding side to rotate, which in turn causes the first conveyor belt 40 to rotate, thereby inputting the film from one side of the first conveyor belt 40 and outputting it from the other side.
[0022] During this process, due to the elasticity of the compression spring 65, while adjusting the distance between the upper and lower flattening components, the cutter 51 and the support plate 53 can always remain in contact. When the film passes between the cutter 51 and the support plate 53, the cutter 51 and the support plate 53 rotate under the friction of the film, thereby cutting off the edge of the film. The flattening component presses the film tightly, ensuring that the film remains flat during the edge cutting process.
[0023] Those skilled in the art will appreciate that various modifications to the above embodiments can be made without departing from the overall spirit and concept of this utility model. All such modifications fall within the protection scope of this utility model. The protection scheme of this utility model is defined by the appended claims.
Claims
1. A TPU film edge-cutting machine, characterized in that, include: The base (10) has two upright plates (11) that are symmetrically arranged front and back on the upper surface of the base (10). The flattening assembly has two components arranged symmetrically at the top and bottom. The flattening assembly is located on the upper side of the base (10) and between two upright plates (11). The flattening assembly includes two connecting plates (20) arranged symmetrically at the front and back. Two left-right symmetrical (33) are rotatably connected between the two connecting plates (20). Pressure rollers (30) are fixed on the outer periphery of the (33). A first conveyor belt (40) is poweredly connected between the two pressure rollers (30). A second conveyor belt (41) is arranged on both the front and back sides of the first conveyor belt (40). The second conveyor belt (41) is poweredly connected between the two pressure rollers (30). A gap is formed between the second conveyor belt (41) and the first conveyor belt (40). The TPU film is flattened by the first conveyor belt (40) on the upper and lower sides and the second conveyor belts (41) on the upper and lower sides. The cutting assembly has two parts, each located within a flattening assembly. Each cutting assembly includes two sliding seats (60), which are slidably connected to the connecting plates (20) on the corresponding sides. A drive shaft (50) is rotatably connected between the two sliding seats (60). Two symmetrical cutters (51) are fixed on the outer periphery of the upper drive shaft (50), and two symmetrically arranged support discs (53) are fixed on the outer periphery of the lower drive shaft (50). The outer periphery of the cutter (51) abuts against the outer periphery of the support disc (53). The outer periphery of the cutter (51) and the support disc (53) are embedded in the gap between the second conveyor belt (41) and the first conveyor belt (40). By the cutter (51) abutting against the outer periphery of the support disc (53), the edge of the film passing between the cutter (51) and the support disc (53) is cut off.
2. The TPU film edge-cutting machine according to claim 1, characterized in that, Two symmetrical retaining rings (32) are fixed on the outer periphery of the pressure roller (30). The retaining rings (32) are used to separate the limiting ring (31) and the first conveyor belt (40), so that the gap between the limiting ring (31) and the first conveyor belt (40) remains unchanged.
3. A TPU film edge-cutting machine according to claim 2, characterized in that, Two symmetrical limiting rings (31) are fixed on the outer periphery of the pressure roller (30), and two retaining rings (32) are located between the two limiting rings (31). The second conveyor belt (41) is located between the limiting rings (31) and the adjacent retaining rings (32).
4. A TPU film edge-cutting machine according to claim 1, characterized in that, Two symmetrical threaded blocks (21) are fixed on the side of the connecting plate (20) away from the pressure roller (30). A fixing plate (12) is fixed at the upper end of the vertical plate (11). The fixing plate (12) is located between the upper and lower threaded blocks (21). A screw (22) is rotatably connected inside the fixing plate (12) and passes through the upper and lower threaded blocks (21). The screw (22) is threadedly connected to the threaded blocks (21). The threads of the upper and lower threaded blocks (21) have opposite directions of rotation.
5. A TPU film edge-cutting machine according to claim 1, characterized in that, The connecting plate (20) has a guide block (62) fixed on the side near the pressure roller (30) that corresponds to the sliding seat (60). The sliding seat (60) has a guide groove (63) that runs through the front and back. The guide block (62) passes through the guide groove (63) and is slidably connected to it. The guide block (62) has a second spring seat (66) fixed on it. The sliding seat (60) has an annular connecting seat (61) fixed on it. The annular connecting seat (61) is located between the upper and lower second spring seats (66). The two ends of the transmission shaft (50) are rotatably connected to the annular connecting seats (61) on the front and back sides respectively. The sliding seat (60) has a first spring seat (64) fixed on it. The second spring seat (66) is located between the upper and lower first spring seats (64). A compression spring (65) is fixed between the first spring seat (64) and the second spring seat (66).
6. A TPU film edge-cutting machine according to claim 5, characterized in that, Two symmetrical bushings (52) are fitted on the outer periphery of the drive shaft (50). The bushings (52) are threaded with fastening bolts (54) perpendicular to the axis of the drive shaft (50). The fastening bolts (54) abut against the outer periphery of the drive shaft (50), so that the bushings (52) are fixed on the outer periphery of the drive shaft (50). The cutter (51) is fixed on the outer periphery of the upper bushing (52), and the support plate (53) is fixed on the outer periphery of the lower bushing (52).