Production device of tpu color-changing film

Abstract

The application belongs to the technical field of color-changing film production, and particularly relates to a production device for TPU color-changing film, which comprises a base, two driving rollers arranged in the base and rotating synchronously, two driven rollers rotating in cooperation with the driving rollers, and two tension adjusting rollers arranged on the base and capable of extruding the TPU color-changing film at two ends of the TPU color-changing film. The driving rollers and the driven rollers are arranged to clamp and convey the TPU color-changing film. The two groups of driving rollers rotate synchronously to stabilize the tightness of the conveyed TPU color-changing film. In the process of edge cutting, the two tension adjusting rollers arranged on the base can extrude the TPU color-changing film at two ends, so as to adjust the tightness of the TPU color-changing film. The pressing roller and the shearing seat are arranged to extrude the cutting position edge of the TPU color-changing film, so as to extrude and protect the cutting position, avoid the tensile force generated in the cutting process from causing the TPU color-changing film to stretch, and facilitate the control of the tightness of the TPU color-changing film in the conveying and edge cutting process, thereby improving the quality of the edge cutting of the TPU color-changing film.

Description

Technical Field

[0001] This invention belongs to the field of color-changing film production technology, specifically a production device for TPU color-changing film. Background Technology

[0002] With the continuous upgrading of the automotive consumer market, consumers' demand for personalized car appearance is growing. As an important means of achieving this demand, TPU color-changing films offer superior elasticity and toughness compared to traditional PVC films. They provide strong resistance to scratches and impacts, and their weather resistance and anti-yellowing capabilities are also excellent. Even after long-term exposure to ultraviolet light, they maintain color stability, preventing premature fading or yellowing and preserving the vehicle's aesthetics. Currently, the main production process for TPU color-changing films includes a PVC & TPU lamination process. This process involves laminating a thin layer of PVC color-changing film onto a thin layer of transparent TPU, ultimately creating a TPU color-changing film. This process significantly reduces the cost of TPU color-changing films compared to pure TPU. However, after lamination, the edges of the PVC and TPU films may have burrs or other deviations, necessitating edge trimming after lamination.

[0003] A Chinese patent with publication number CN223493360U discloses a PET resin film edge cutting device. The application uses a set pressure roller assembly to dynamically clamp the resin film. During the clamping and conveying process, the conveyed resin film is cut by a cutting assembly. At the same time, the set pressure roller and cutting blade holder can slide and adjust along the axial direction to adjust the cutting position.

[0004] In existing technologies, the film needs to be clamped and conveyed during edge trimming. During clamping and conveying, tension is applied to the film itself, which causes the film to stretch and deform. After the stretched film is cut and the tension is removed, the film itself will spring back. The edges of the springbacked film will have burrs, which will affect the edge trimming quality. In particular, TPU color-changing film has good elasticity and is prone to overstretching during conveying. Overstretched TPU color-changing film will have burrs on the cut edges after shearing and springing back, which will affect the neatness of the cut edges and thus affect the production quality of TPU color-changing film.

[0005] Therefore, the present invention provides a production apparatus for TPU color-changing film. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A TPU color-changing film production device of the present invention includes a base, inside which are arranged two synchronously rotating active rollers, which are symmetrical and parallel to each other. Each of the two active rollers is provided with a rotatably cooperating driven roller. The rotatably cooperating active roller and driven roller are used to clamp and transport the TPU color-changing film. Inside the base is a liftable conveyor seat, which is located directly above the two active rollers. The TPU color-changing film is conveyed by adhering to the top of the conveyor seat. The conveyor seat is provided with two cutting wheels. Inside the conveyor seat are two shearing seats adapted to the cutting wheels. Each of the two shearing seats is provided with a pressure roller. The pressure roller cooperates with the shearing seat to squeeze the transported TPU color-changing film, and the cutting wheel is located between the two pressure rollers. Inside the base and between the active rollers and the conveyor seat are two displaceable tension adjustment rollers. The device also includes a power mechanism for driving the cutting wheels to rotate.

[0008] Preferably, a second servo motor is fixedly connected to the base, the output shaft of the second servo motor is fixedly connected to the drive roller, the drive roller is attached to the underside of the driven roller, a lifting frame is rotatably connected to the driven roller, the lifting frame is movably connected to the base, and a third hydraulic cylinder is fixedly connected to the base, the telescopic end of the third hydraulic cylinder is fixedly connected to the lifting frame.

[0009] Preferably, a return frame is movably connected to the conveyor seat, and a first hydraulic cylinder is fixedly connected inside the return frame. The fixed end of the first hydraulic cylinder is fixedly connected to the conveyor seat. A first dual-axis motor is fixedly connected to the top of the return frame. Both ends of the first dual-axis motor are provided with a first lead screw. One end of each of the two first lead screws is provided with a threaded T-shaped push plate. Both T-shaped push plates are movably connected to the return frame, and two cutter wheels are rotatably connected to the two T-shaped push plates respectively.

[0010] Preferably, the power mechanism includes a first servo motor, which is fixedly connected to the return frame. The output shaft of the first servo motor is fixedly connected to a shaft rod, and two limiting sleeves are movably connected to the shaft rod. The two cutter wheels are respectively fixedly sleeved on the two limiting sleeves, and the end of the limiting sleeve away from the cutter wheel is rotatably connected to the T-shaped push plate.

[0011] Preferably, two fourth hydraulic cylinders are fixedly connected to the base, and the telescopic ends of the two fourth hydraulic cylinders are fixedly connected to the conveyor seat. Two guide rollers are rotatably connected to the conveyor seat, and the conveyor seat is movably connected to the base.

[0012] Preferably, a hanger is rotatably connected to both pressure rollers, and the hanger is movably suspended on the forming frame. A second hydraulic cylinder and a guide rod are fixedly connected to the forming frame. There are two second hydraulic cylinders. The telescopic ends of the two second hydraulic cylinders are fixedly connected to an extrusion plate. The extrusion plate is movably sleeved on the guide rod. A spring is fixedly connected to the bottom of the extrusion plate, and one end of the spring is fixedly connected to the hanger.

[0013] Preferably, the top of the shearing seat is provided with a blade groove, and the blade wheel rotates with the shearing seat through the blade groove. The shearing seat has two cooling chambers inside, and a connecting pipe is provided between the two cooling chambers. One end of the connecting pipe is used to connect to the cold air input end, and an air hole is provided between the cooling chamber and the blade groove.

[0014] Preferably, a second dual-axis motor is fixedly connected inside the conveyor seat. A second lead screw is provided at both ends of the second dual-axis motor. The two second lead screws pass through the two shear seats respectively. The second lead screws are used to drive the threaded shear seats to move. The top of the shear seats is flush with the top of the conveyor seat.

[0015] Preferably, both ends of the tension adjusting roller are rotatably connected to I-shaped slides, the base has a limit opening, the I-shaped slides are movably connected within the limit opening, a connecting frame is fixedly connected to both I-shaped slides, a third dual-axis motor is fixedly connected to the base, and a third lead screw is provided at both ends of the third dual-axis motor. The third lead screw is connected through the connecting frame, and the third lead screw is threadedly engaged with the connecting frame.

[0016] Preferably, a PLC controller is provided on one side of the base. The third dual-axis motor, the third hydraulic cylinder, the second servo motor, the fourth hydraulic cylinder, the first hydraulic cylinder, the first servo motor, the first dual-axis motor, the second hydraulic cylinder, and the second dual-axis motor are all electrically connected to the PLC controller via wires. Pressure sensors are provided on the extension and retraction ends of the third hydraulic cylinder, the fourth hydraulic cylinder, and the second hydraulic cylinder. The pressure sensors are used to detect the squeezing force.

[0017] The beneficial effects of this invention are as follows: 1. The TPU color-changing film production device of the present invention, wherein the TPU color-changing film is clamped by a set active roller and a driven roller. When the active roller rotates, it can drive the clamped TPU color-changing film to be conveyed. There are two active rollers, which are respectively set at both ends of the TPU color-changing film to rotate, so that the tightness of the TPU color-changing film conveyed between the two active rollers is stable. Then, by adjusting the rise of the conveyor seat, the conveyor seat can be attached to the bottom of the conveyed TPU color-changing film, so that the TPU color-changing film can be horizontally attached to the conveyor seat for conveying. Since the shearing seat set inside the conveyor seat is flush with the conveyor seat, the TPU color-changing film conveyed through the top of the conveyor seat can be attached to the top of the shearing seat. At this time, the drive cutter wheel is lowered to cooperate with the shearing seat, and the drive mechanism drives the cutter wheel to rotate. The cutter wheel and the shearing seat can cut the conveyed TPU color-changing film.

[0018] 2. The TPU color-changing film production device of the present invention has two tension adjustment rollers on the base that can squeeze the conveyed TPU color-changing film, thereby adjusting the tension of the TPU color-changing film conveyed between the two active rollers. When the tension adjustment rollers move closer to the conveying seat, the conveyed TPU color-changing film is stretched more tightly, and vice versa. This allows for timely adjustment of the tension according to the elasticity of the TPU color-changing film, avoiding excessive stretching of the TPU color-changing film and affecting the cutting quality. The two pressure rollers, together with the shearing seat, can squeeze the edge of the TPU color-changing film at the shearing position, and the squeezing force can counteract the local tension generated by the rotation of the cutter wheel on the TPU color-changing film. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the connection between the driving roller and the driven roller in this invention; Figure 3 This is a schematic diagram showing the connection between the tension adjustment roller and the base in this invention; Figure 4 This is a schematic diagram showing the connection between the conveyor seat and the cutter wheel in this invention; Figure 5 This is a schematic diagram showing the connection between the base and the conveyor seat in this invention; Figure 6 This is a schematic diagram of the connection between the cutter wheel and the pressure roller in this invention; Figure 7 In this invention Figure 4 A sectional view; Figure 8 This is a schematic diagram of the shear seat in this invention; Figure 9 This is a schematic diagram of the TPU color-changing film delivery process in this invention.

[0021] In the diagram: 1. Base; 11. Limiting port; 12. Third dual-axis motor; 121. Third lead screw; 13. Third hydraulic cylinder; 14. Second servo motor; 15. Fourth hydraulic cylinder; 2. Driving roller; 21. Driven roller; 22. Lifting frame; 3. Tension adjusting roller; 31. I-shaped slide; 32. Connecting frame; 4. Conveyor seat; 41. Guide roller; 42. First hydraulic cylinder; 43. Return frame; 44. First servo motor ; 441, Shaft; 442, Limiting sleeve; 45, First dual-axis motor; 451, First lead screw; 452, T-shaped push plate; 46, Second hydraulic cylinder; 461, Extrusion plate; 462, Spring; 47, Guide rod; 48, Second dual-axis motor; 481, Second lead screw; 5, Cutting wheel; 6, Shearing seat; 61, Cutting groove; 62, Cooling chamber; 63, Connecting pipe; 7, Pressure roller; 71, Hanger; 8, PLC controller. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 9 As shown, an embodiment of the present invention provides a TPU color-changing film production device, comprising a base 1, inside which are arranged two synchronously rotating active rollers 2, which are symmetrical and parallel to each other, and each of the two active rollers 2 is provided with a rotatably engaged driven roller 21, which is used to clamp and transport the TPU color-changing film. Inside the base 1 is a liftable conveyor seat 4, which is located directly above the two active rollers 2. The TPU color-changing film is conveyed by adhering to the top of the conveyor seat 4. The conveyor seat 4 is provided with two cutting wheels 5, and inside the conveyor seat 4 are two shearing seats 6 adapted to the cutting wheels 5. Each of the two shearing seats 6 is provided with a pressure roller 7, which, in conjunction with the shearing seats 6, presses the transported TPU color-changing film. The cutting wheels 5 are located between the two pressure rollers 7. Inside the base 1 and between the active rollers 2 and the conveyor seat 4 are two displaceable tension adjustment rollers 3. The device also includes a power mechanism for driving the cutting wheels 5 to rotate. In operation, this application is mainly used for edge trimming of rolled TPU color-changing films. When using this device, the compressed TPU color-changing film needs to be passed through and conveyed from the inside of the base 1. Because the TPU color-changing film is elastic, and it needs to be wound and conveyed during production, the winding and conveying will apply tension to the TPU color-changing film, which will cause the TPU color-changing film to stretch during conveying and shearing. After shearing, it will spring back. However, the excessively stretched TPU color-changing film will cause burrs on the cut edge after shearing and springing back, thus affecting the neatness of the cut edge. In the process of conveying and trimming the TPU color-changing film, the active roller 2 and the driven roller 21 can first clamp the TPU color-changing film. When the active roller 2 rotates, it can drive the clamped TPU color-changing film to... The conveying mechanism consists of two active rollers 2. Since both active rollers 2 provide power to the conveyed TPU color-changing film, the tension of the TPU color-changing film in the area between the two active rollers 2 remains stable during the conveying process. Then, by adjusting the conveyor seat 4 to rise, the conveyor seat 4 can fit against the bottom of the conveyed TPU color-changing film. The conveyor seat 4 is located directly above the area between the two active rollers 2, so that the TPU color-changing film can be conveyed horizontally on the conveyor seat 4. Since the shear seat 6 inside the conveyor seat 4 is flush with the conveyor seat 4, the TPU color-changing film conveyed through the top of the conveyor seat 4 can fit against the top of the shear seat 6. At this time, the drive blade wheel 5 is lowered to cooperate with the shear seat 6. Then, the drive blade wheel 5 is driven to rotate by the power mechanism. The blade wheel 5 and the shear seat 6 can cut the conveyed TPU color-changing film. During the edge cutting process, the two tension adjustment rollers 3 on the base 1 can squeeze the conveyed TPU color change film, thereby adjusting the tension of the TPU color change film conveyed between the two active rollers 2. When the tension adjustment rollers 3 move closer to the conveying seat 4, the conveyed TPU color change film is stretched more tightly, and vice versa. This allows for timely adjustment of the tension according to the elasticity of the TPU color change film, avoiding excessive stretching of the TPU color change film and affecting the cutting quality. The two pressure rollers 7, together with the shearing seat 6, can squeeze the edge of the TPU color change film at the cutting position. The squeezing force can offset the local tension generated by the rotation of the cutter wheel 5 on the TPU color change film. In summary, this application uses an active roller 2 in conjunction with a driven roller 21 to clamp and convey the TPU color-changing film. The synchronous rotation of the two sets of active rollers 2 ensures stable tension of the conveyed TPU color-changing film. During the edge-cutting process, the two tension adjustment rollers 3 on the base 1 can squeeze both ends of the TPU color-changing film to adjust its tension. The pressure roller 7, in conjunction with the shearing seat 6, can press against the cutting edge of the TPU color-changing film to protect the cutting edge and prevent the tension generated during cutting from stretching the TPU color-changing film. This facilitates control of the tension of the TPU color-changing film during edge-cutting and improves the quality of the TPU color-changing film edge-cutting.

[0024] like Figure 2 As shown, a second servo motor 14 is fixedly connected to the base 1. The output shaft of the second servo motor 14 is fixedly connected to the active roller 2. The active roller 2 is attached to the bottom of the driven roller 21. A lifting frame 22 is rotatably connected to the driven roller 21. The lifting frame 22 is movably connected to the base 1. A third hydraulic cylinder 13 is fixedly connected to the base 1. The telescopic end of the third hydraulic cylinder 13 is fixedly connected to the lifting frame 22. During operation, the TPU color-changing film conveyed on the base 1 can pass between the active roller 2 and the driven roller 21. The active roller 2 and the driven roller 21 clamp the TPU color-changing film on the upper and lower sides. By turning on the second servo motor 14, the connected active roller 2 is driven to rotate. The active roller 2 and the driven roller 21 can drive the clamped TPU color-changing film to be conveyed. Since the third hydraulic cylinder 13 can push the lifting frame 22 to rise and fall, the lifting frame 22 can drive the rotating driven roller 21 to rise and fall. The driven roller 21 and the active roller 2 can squeeze the TPU color-changing film conveyed in the middle, thereby adjusting the clamping force of the active roller 2 and the driven roller 21 on the TPU color-changing film, which facilitates the conveying of the clamped TPU color-changing film.

[0025] like Figure 6 and Figure 7 As shown, a return frame 43 is movably connected to the above-mentioned conveyor seat 4. A first hydraulic cylinder 42 is fixedly connected inside the return frame 43. The fixed end of the first hydraulic cylinder 42 is fixedly connected to the conveyor seat 4. A first dual-axis motor 45 is fixedly connected to the top of the return frame 43. A first lead screw 451 is provided at both ends of the first dual-axis motor 45. A threaded T-shaped push plate 452 is provided at one end of each of the two first lead screws 451. The two T-shaped push plates 452 are movably connected to the return frame 43. The two cutter wheels 5 are rotatably connected to the two T-shaped push plates 452 respectively. During operation, the retractable frame 43 on the conveyor seat 4 can drive the connected cutter wheel 5 to rise and fall. When the TPU color-changing film passes between the conveyor seat 4 and the cutter wheel 5, the first hydraulic cylinder 42 is opened, which drives the retractable frame 43 to rise and fall. The retractable frame 43 can drive the connected cutter wheel 5 to rise and fall, thereby adjusting the cutter wheel 5 to fit on the TPU color-changing film for cutting. Before the cutter wheel 5 descends for cutting, the distance between the two cutter wheels 5 can be adjusted, thereby adjusting the width of the cut edge. That is, by opening the first dual-axis motor 45, the two first lead screws 451 can be driven to rotate. The two first lead screws 451 respectively drive the two threaded T-shaped push plates 452 to move on the retractable frame 43. The T-shaped push plates 452 can drive the rotating cutter wheel 5 to move, thereby adjusting the distance between the two cutter wheels 5 to adjust the width of the cut edge.

[0026] like Figure 6 and Figure 7As shown, the above-mentioned power mechanism includes a first servo motor 44, which is fixedly connected to the return frame 43. The output shaft of the first servo motor 44 is fixedly connected to a shaft 441. Two limiting sleeves 442 are movably connected to the shaft 441. Two cutting wheels 5 are respectively fixedly sleeved on the two limiting sleeves 442. The end of the limiting sleeve 442 away from the cutting wheel 5 is rotatably connected to the T-shaped push plate 452. During operation, the power mechanism can drive the cutter wheel 5 to rotate. That is, turning on the first servo motor 44 can drive the shaft 441 to rotate on the return frame 43. The shaft 441 is provided with a limit strip. The limit sleeve 442 slides with the limit strip through a groove, so that the limit sleeve 442 can slide at the upper limit on the shaft 441. It should be noted that since the limit sleeve 442 is rotatably connected to the T-shaped push plate 452, during the process of the limit sleeve 442 sliding on the shaft 441, the shaft 441 can always drive the limit sleeve 442 to rotate, that is, drive the cutter wheel 5 to rotate, so that the two cutter wheels 5 can continue to rotate and cut after adjusting the distance.

[0027] like Figure 5 As shown, two fourth hydraulic cylinders 15 are fixedly connected to the base 1. The telescopic ends of the two fourth hydraulic cylinders 15 are fixedly connected to the conveyor seat 4. Two guide rollers 41 are rotatably connected to the conveyor seat 4. The conveyor seat 4 is movably connected to the base 1. During operation, the two fourth hydraulic cylinders 15 can push the connected conveyor seat 4 to rise and fall on the base 1. When the TPU color-changing film passes over the conveyor seat 4, opening the fourth hydraulic cylinder 15 can push the conveyor seat 4 to adhere to the bottom of the TPU color-changing film, thereby adjusting the conveyed TPU color-changing film to adhere to the top of the conveyor seat 4 for horizontal conveying.

[0028] like Figure 7 and Figure 8 As shown, the two pressure rollers 7 are rotatably connected to a hanger 71. The hanger 71 is movably suspended on the return frame 43. The return frame 43 is fixedly connected to a second hydraulic cylinder 46 and a guide rod 47. There are two second hydraulic cylinders 46. The telescopic ends of the two second hydraulic cylinders 46 are fixedly connected to a pressing plate 461. The pressing plate 461 is movably sleeved on the guide rod 47. A spring 462 is fixedly connected to the bottom of the pressing plate 461. One end of the spring 462 is fixedly connected to the hanger 71. During operation, when the pressure roller 7, in conjunction with the shear seat 6, presses against the conveyed TPU color-changing film, the pressing force of the pressure roller 7 can counteract the tension generated by the shearing on the TPU color-changing film. The pressure of the pressure roller 7 can be adjusted by the second hydraulic cylinder 46, so as to adjust the pressing force of the pressure roller 7. The pressing force of the pressure roller 7 can be adjusted according to the magnitude of the tension generated by the shearing. That is, when the TPU color-changing film is conveyed and sheared, the pressing force of the pressure roller 7 is adjusted until the TPU color-changing film around the shearing position can remain flat. During the adjustment process, opening the two second hydraulic cylinders 46 can drive the extrusion plate 461 to descend. The extrusion plate 461 can compress the spring 462 sleeved on the guide rod 47, and the spring 462 can squeeze the hanger 71. The hanger 71 drives the rotating pressure roller 7 to press against the shear seat 6. That is, the pressing force of the pressure roller 7 is adjusted by adjusting the compression force of the spring 462.

[0029] like Figure 7 and Figure 8 As shown, the top of the shear seat 6 is provided with a blade groove 61, and the blade wheel 5 rotates with the shear seat 6 through the blade groove 61. The shear seat 6 has two cooling chambers 62 inside, and a connecting pipe 63 is provided between the two cooling chambers 62. One end of the connecting pipe 63 is used to connect to the cold air input end, and an air hole is provided between the cooling chamber 62 and the blade groove 61. During operation, the shearing seat 6 engages with the cutting wheel 5 through the cutter groove 61, thereby supporting and shearing the conveyed TPU color-changing film. This protects the cut area of ​​the TPU color-changing film. Simultaneously, the cold air inlet delivers cold air to the cooling chamber 62 through a hose. The cold air cools the shearing seat 6, and the cooled shearing seat 6 cools the conveyed TPU color-changing film. After heat exchange, the cold air is then introduced into the cutter groove 61 through the air hole. The gas entering the cutter groove 61 disperses the hot air around the cutting wheel 5, thus allowing the cutting wheel 5 to dissipate heat from both the cut area of ​​the TPU color-changing film and the cutting wheel 5 during the cutting process. This prevents high temperatures from affecting the tensile strength of the TPU color-changing film.

[0030] like Figure 7 As shown, a second dual-axis motor 48 is fixedly connected inside the above-mentioned conveying seat 4. A second lead screw 481 is provided at both ends of the second dual-axis motor 48. The two second lead screws 481 pass through the two shear seats 6 respectively. The second lead screws 481 are used to drive the shear seats 6 with threaded engagement to move. The shear seats 6 are flush with the top of the conveying seat 4. During operation, the second dual-axis motor 48 drives the second lead screw 481 to rotate, and the second lead screw 481 drives the threaded shear seat 6 to move on the conveyor seat 4. The displacement distance of the shear seat 6 is synchronized with the displacement distance of the cutter wheel 5, and the top of the shear seat 6 is flush with the top of the conveyor seat 4, so that the TPU color-changing film conveyed on the conveyor seat 4 can adhere to the shear seat 6. The shear seat 6 and the cutter wheel 5 cooperate to cut the conveyed TPU color-changing film.

[0031] like Figure 3 and Figure 9 As shown, both ends of the tension adjustment roller 3 are rotatably connected to I-shaped slides 31. A limit opening 11 is provided on the base 1. The I-shaped slides 31 are movably connected in the limit opening 11. A connecting frame 32 is fixedly connected to both I-shaped slides 31. A third dual-axis motor 12 is fixedly connected to the base 1. A third lead screw 121 is provided at both ends of the third dual-axis motor 12. The third lead screw 121 is connected through the connecting frame 32 and the third lead screw 121 is threadedly engaged with the connecting frame 32. During operation, the tension adjustment roller 3 can press and guide the TPU color-changing film. When the tension adjustment roller 3 guides the TPU color-changing film, it can rotate on the base 1 through two I-shaped slides 31. The I-shaped slides 31 can slide within the limit port 11. The two I-shaped slides 31 are connected by a connecting frame 32. When the third dual-axis motor 12 is turned on, it can drive the third lead screw 121 to rotate. The third lead screw 121 is threadedly engaged with the connecting frame 32, thereby causing the third lead screw 121 to drive the connecting frame 32 to move. The connecting frame 32 drives the tension adjustment roller 3 between the two I-shaped slides 31 to move. The moved tension adjustment roller 3 can adjust the pressure on the TPU color-changing film, thereby adjusting the tension of the TPU color-changing film being conveyed.

[0032] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, a PLC controller 8 is provided on one side of the base 1. The third dual-axis motor 12, the third hydraulic cylinder 13, the second servo motor 14, the fourth hydraulic cylinder 15, the first hydraulic cylinder 42, the first servo motor 44, the first dual-axis motor 45, the second hydraulic cylinder 46, and the second dual-axis motor 48 are all electrically connected to the PLC controller 8 via wires. Pressure sensors are provided on the extension and retraction ends of the third hydraulic cylinder 13, the fourth hydraulic cylinder 15, and the second hydraulic cylinder 46. The pressure sensors are used to detect the squeezing force. During operation, the PLC controller 8 can control the operation of the third dual-axis motor 12, the third hydraulic cylinder 13, the second servo motor 14, the fourth hydraulic cylinder 15, the first hydraulic cylinder 42, the first servo motor 44, the first dual-axis motor 45, the second hydraulic cylinder 46, and the second dual-axis motor 48 respectively. At the same time, the pressure sensor on the third hydraulic cylinder 13 can detect the clamping force of the active roller 2 and the driven roller 21 on the TPU color-changing film. The pressure sensor on the fourth hydraulic cylinder 15 can detect the squeezing force of the TPU color-changing film on the conveyor seat 4 during conveying. The pressure sensor on the second hydraulic cylinder 46 can detect the squeezing force between the pressure roller 7 and the shearing seat 6. Since the TPU color-changing film is conveyed between the pressure roller 7 and the shearing seat 6 during shearing, the magnitude of the squeezing force on the TPU color-changing film conveyed by the shearing seat 6 is detected.

[0033] Work process: First, the TPU color-changing film conveyed on the base 1 can pass between the active roller 2 and the driven roller 21. The active roller 2 and the driven roller 21 clamp the TPU color-changing film on the upper and lower sides. By turning on the second servo motor 14, the connected active roller 2 is driven to rotate. The active roller 2 and the driven roller 21 can drive the clamped TPU color-changing film to be conveyed. Since the third hydraulic cylinder 13 can push the lifting frame 22 to rise and fall, the lifting frame 22 can drive the rotating driven roller 21 to rise and fall. The driven roller 21 and the active roller 2 can squeeze the TPU color-changing film conveyed in the middle, thereby adjusting the clamping force of the active roller 2 and the driven roller 21 on the TPU color-changing film, which facilitates the conveying of the clamped TPU color-changing film. During the conveying of TPU color-changing film, the retractable frame 43 on the conveyor seat 4 can drive the connected cutter wheel 5 to rise and fall. When the TPU color-changing film passes between the conveyor seat 4 and the cutter wheel 5, the first hydraulic cylinder 42 is opened, which drives the retractable frame 43 to rise and fall. The retractable frame 43 can drive the connected cutter wheel 5 to rise and fall, thereby adjusting the cutter wheel 5 to fit on the TPU color-changing film for cutting. Before the cutter wheel 5 descends for cutting, the distance between the two cutter wheels 5 can be adjusted, thereby adjusting the width of the cut edge. That is, by opening the first dual-axis motor 45, the two first lead screws 451 can be driven to rotate. The two first lead screws 451 respectively drive the two threaded T-shaped push plates 452 to move on the retractable frame 43. The T-shaped push plates 452 can drive the rotating cutter wheel 5 to move, thereby adjusting the distance between the two cutter wheels 5 to adjust the width of the cut edge. The power mechanism can drive the cutter wheel 5 to rotate. That is, turning on the first servo motor 44 can drive the shaft 441 to rotate on the return frame 43. The shaft 441 is provided with a limit strip. The limit sleeve 442 slides with the limit strip through a groove, so that the limit sleeve 442 can slide at the upper limit on the shaft 441. It should be noted that since the limit sleeve 442 is rotatably connected to the T-shaped push plate 452, during the process of the limit sleeve 442 sliding on the shaft 441, the shaft 441 can always drive the limit sleeve 442 to rotate, that is, drive the cutter wheel 5 to rotate, so that the two cutter wheels 5 can continue to rotate and cut after adjusting the distance between them. During the conveying and cutting process, the two fourth hydraulic cylinders 15 can push the connected conveying seat 4 to rise and fall on the base 1. When the TPU color-changing film passes over the conveying seat 4, the fourth hydraulic cylinder 15 can be opened to push the conveying seat 4 to adhere to the bottom of the TPU color-changing film, thereby adjusting the conveyed TPU color-changing film to adhere to the top of the conveying seat 4 for horizontal conveying. When the pressure roller 7, in conjunction with the shear seat 6, presses against the conveyed TPU color-changing film, the pressing force of the pressure roller 7 can counteract the tension generated by the shearing on the TPU color-changing film. The pressure of the pressure roller 7 can be adjusted by the second hydraulic cylinder 46, so as to adjust the pressing force of the pressure roller 7. The pressing force of the pressure roller 7 can be adjusted according to the magnitude of the tension generated by the shearing. That is, when the TPU color-changing film is conveyed and sheared, the pressing force of the pressure roller 7 is adjusted until the TPU color-changing film around the shearing position can remain flat. During the adjustment process, opening the two second hydraulic cylinders 46 can drive the extrusion plate 461 to descend. The extrusion plate 461 can compress the spring 462 sleeved on the guide rod 47, and the spring 462 can squeeze the hanger 71. The hanger 71 drives the rotating pressure roller 7 to press against the shear seat 6. That is, the pressing force of the pressure roller 7 is adjusted by adjusting the compression force of the spring 462. The tension adjustment roller 3 is designed to press and guide the TPU color-changing film. When the tension adjustment roller 3 guides the TPU color-changing film, it can rotate on the base 1 through two I-shaped slides 31. The I-shaped slides 31 can slide within the limit port 11. The two I-shaped slides 31 are connected by a connecting frame 32. When the third dual-axis motor 12 is turned on, it can drive the third lead screw 121 to rotate. The third lead screw 121 is threadedly engaged with the connecting frame 32, thereby causing the third lead screw 121 to move the connecting frame 32. The connecting frame 32 then moves the tension adjustment roller 3 between the two I-shaped slides 31. The moved tension adjustment roller 3 can adjust the pressure on the TPU color-changing film, thereby adjusting the tension of the TPU color-changing film being conveyed.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production apparatus for TPU color-changing film, characterized in that: The device includes a base, inside which are two synchronously rotating drive rollers, symmetrical and parallel to each other. Each drive roller has a rotatably engaged driven roller, which is used to clamp and transport TPU color-changing film. The base also includes a liftable conveyor seat located directly above the two drive rollers. The TPU color-changing film is conveyed against the top of the conveyor seat. The conveyor seat has two cutting wheels, and inside it are two shearing seats adapted to the cutting wheels. Each shearing seat has a pressure roller, which, in conjunction with the shearing seats, presses the transported TPU color-changing film. The cutting wheels are located between the two pressure rollers. Inside the base, between the drive rollers and the conveyor seat, are two movable tension adjusting rollers. The device also includes a power mechanism for driving the cutting wheels to rotate.

2. The production apparatus for TPU color-changing film according to claim 1, characterized in that: A second servo motor is fixedly connected to the base. The output shaft of the second servo motor is fixedly connected to the drive roller. The drive roller is attached to the bottom of the driven roller. A lifting frame is rotatably connected to the driven roller. The lifting frame is movably connected to the base. A third hydraulic cylinder is fixedly connected to the base. The telescopic end of the third hydraulic cylinder is fixedly connected to the lifting frame.

3. The TPU color-changing film production apparatus according to claim 2, characterized in that: A return frame is movably connected to the conveyor seat. A first hydraulic cylinder is fixedly connected inside the return frame. The fixed end of the first hydraulic cylinder is fixedly connected to the conveyor seat. A first dual-axis motor is fixedly connected to the top of the return frame. A first lead screw is provided at both ends of the first dual-axis motor. A threaded T-shaped push plate is provided at one end of each of the two first lead screws. The two T-shaped push plates are movably connected to the return frame. Two cutter wheels are rotatably connected to the two T-shaped push plates respectively.

4. The TPU color-changing film production apparatus according to claim 3, characterized in that: The power mechanism includes a first servo motor, which is fixedly connected to the return frame. The output shaft of the first servo motor is fixedly connected to a shaft rod, and two limiting sleeves are movably connected to the shaft rod. The two cutter wheels are respectively fixedly sleeved on the two limiting sleeves, and the end of the limiting sleeve away from the cutter wheel is rotatably connected to the T-shaped push plate.

5. The TPU color-changing film production apparatus according to claim 4, characterized in that: Two fourth hydraulic cylinders are fixedly connected to the base, and the telescopic ends of the two fourth hydraulic cylinders are fixedly connected to the conveyor seat. Two guide rollers are rotatably connected to the conveyor seat, and the conveyor seat is movably connected to the base.

6. The TPU color-changing film production apparatus according to claim 1, characterized in that: A hanger is rotatably connected to both pressure rollers. The hanger is movably suspended on the forming frame. A second hydraulic cylinder and a guide rod are fixedly connected to the forming frame. There are two second hydraulic cylinders. The telescopic ends of the two second hydraulic cylinders are fixedly connected to an extrusion plate. The extrusion plate is movably sleeved on the guide rod. A spring is fixedly connected to the bottom of the extrusion plate. One end of the spring is fixedly connected to the hanger.

7. The TPU color-changing film production apparatus according to claim 1, characterized in that: The top of the shearing seat is provided with a blade groove, and the blade wheel rotates and engages with the shearing seat through the blade groove. The interior of the shearing seat is provided with two cooling chambers, and a connecting pipe is provided between the two cooling chambers. One end of the connecting pipe is used to connect to the cold air input end, and an air hole is provided between the cooling chamber and the blade groove.

8. The TPU color-changing film production apparatus according to claim 7, characterized in that: The conveyor seat is internally fixedly connected to a second dual-axis motor. Both ends of the second dual-axis motor are provided with a second lead screw. The two second lead screws pass through the two shear seats respectively. The second lead screws are used to drive the threaded shear seats to move. The shear seats are flush with the top of the conveyor seat.

9. The production apparatus for TPU color-changing film according to claim 1, characterized in that: Both ends of the tension adjustment roller are rotatably connected to I-shaped slides. The base has a limit opening, and the I-shaped slides are movably connected within the limit opening. A connecting frame is fixedly connected to both I-shaped slides. A third dual-axis motor is fixedly connected to the base. Both ends of the third dual-axis motor are provided with a third lead screw. The third lead screw is connected through the connecting frame, and the third lead screw is threadedly engaged with the connecting frame.

10. The TPU color-changing film production apparatus according to claim 9, characterized in that: A PLC controller is provided on one side of the base. The third dual-axis motor, the third hydraulic cylinder, the second servo motor, the fourth hydraulic cylinder, the first hydraulic cylinder, the first servo motor, the first dual-axis motor, the second hydraulic cylinder, and the second dual-axis motor are all electrically connected to the PLC controller via wires. Pressure sensors are provided on the extension and retraction ends of the third hydraulic cylinder, the fourth hydraulic cylinder, and the second hydraulic cylinder. The pressure sensors are used to detect the squeezing force.

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