TPU film sampling device and method

Abstract

The invention discloses a TPU film sampling device and method, and belongs to the technical field of film sampling, the TPU film sampling device comprises a rack, an unwinding roller and a sampling roller, the unwinding roller and the sampling roller are both arranged on a clamping mechanism, a guide frame is arranged on the top surface of the rack, a first guide roller and a second guide roller are arranged on the guide frame, a first sliding groove is formed in the top surface of the rack, and a second sliding groove is formed in the top surface of the rack; a first sliding groove is formed in the top face of the rack, a first sliding block is arranged in the first sliding groove, a second sliding groove is formed in the top face of the rack, a first guide rod is arranged in the second sliding groove, a second sliding block is arranged on the first guide rod, a guide frame is arranged between the first sliding block and the second sliding block, a film cutting frame is arranged on one side of the top face of the rack, and a film cutting mechanism is arranged on the film cutting frame. According to the TPU film sampling device and method, the buffer spring and the sliding block are matched to enable the first guide roller to provide stable tensioning force in a self-adaptive mode, and in combination with limiting of the guide frame and the guide frame, it is guaranteed that film conveying is stable and free of wrinkles and deviation.

Description

Technical Field

[0001] This invention relates to the field of thin film sampling technology, and in particular to a TPU thin film sampling device and method. Background Technology

[0002] With the rapid development of science and technology and the continuous growth of the social economy, TPU (thermoplastic polyurethane) film, as a new type of material, is being used more and more widely in various fields such as electronics, energy, and transportation. Due to its excellent physical and chemical properties, such as high elasticity, abrasion resistance, oil resistance, and low-temperature resistance, TPU film has become the preferred material for many high-end products. Especially in the fields of smartphones, automotive parts, industrial control equipment, and cable conduits, the application of TPU film is indispensable. Summary of the Invention

[0003] The purpose of this invention is to provide a TPU film sampling device and method. Through a bidirectional screw-driven clamping rod combined with a locking structure of a limiting block and a limiting groove, precise and stable clamping of the unwinding roller and the sampling roller is achieved. This method is adaptable to rollers of different lengths, and the front and rear clamping mechanisms are independently locked to ensure roller coaxiality. The cooperation of a buffer spring and a slider enables the first guide roller to adaptively provide stable tension. Combined with the limiting of the guide frame and guide box, this ensures smooth, wrinkle-free, and non-deviation-free film transmission. The film cutting mechanism adopts a "press-before-cut" design, and with the precise control of the cutting blade position and roller rotation parameters by a second servo motor, precise control of the sampling width and length is achieved, resulting in excellent cutting quality.

[0004] To achieve the above objectives, the present invention provides a TPU film sampling device, including a frame, an unwinding roller, and a sampling roller. Clamping mechanisms are provided at both ends of the frame, and the unwinding roller and sampling roller are both mounted on the clamping mechanisms. Guide frames are provided on both sides of the top surface of the frame. A first guide roller is provided at the top of the guide frame, and a second guide roller is provided at the bottom of the guide frame. A first groove is formed at one end of the top surface of the frame, and a first slider is provided inside the first groove. The first slider is connected to the clamping mechanism. A second groove is formed at the other end of the top surface of the frame, and a first guide rod is provided inside the second groove. A second slider is mounted on the first guide rod, and a guide frame is provided between the first slider and the second slider. A film cutting frame is provided on one side of the top surface of the frame, and a film cutting mechanism is mounted on the film cutting frame.

[0005] Preferably, the guide frame has a third slide groove, a second guide rod is provided inside the third slide groove, a third slider is provided on the second guide rod, a first guide roller is provided between the two third sliders, and a buffer spring is provided at the bottom end of the third slider, with the bottom end of the buffer spring contacting the inner wall of the third slide groove.

[0006] Preferably, the clamping mechanism includes a clamping rod and a clamping frame. A fourth sliding groove is provided on the side wall of the frame, and a bidirectional lead screw is provided inside the fourth sliding groove. One end of the clamping rod is provided on the bidirectional lead screw. The first slider is connected to the front clamping rod. A rotating shaft is provided on the side wall of the clamping frame. The rotating shaft is inserted into the other end of the clamping rod. Insert blocks are provided on the side walls of the unwinding roller and the sampling roller. The insert blocks are inserted into the clamping frame.

[0007] Preferably, a limiting block is provided inside the clamping frame, and a limiting groove is opened on the side wall of the insertion block, so that the limiting block is inserted into the limiting groove.

[0008] Preferably, the side wall of the frame is provided with a tube, which is connected to the inside of the fourth slide groove. One end of the bidirectional lead screw passes through the tube and is connected to a handle. A positioning pin is inserted on the tube, and the positioning pin passes through the tube and the bidirectional lead screw in sequence.

[0009] Preferably, a mounting frame is provided on the side wall of a clamping rod, and a rotating rod is provided inside the mounting frame. One end of the rotating rod passes through the inside of the clamping rod and is connected to the rotating shaft. A first bevel gear is connected to the rotating rod, and a second bevel gear meshes with one side of the first bevel gear. A first servo motor is provided at the top of the mounting frame, and the output shaft of the first servo motor passes through the inside of the mounting frame and is connected to the second bevel gear.

[0010] Preferably, the first slider sidewall is provided with a connecting rod, the first slide groove is connected to the front fourth slide groove, and the other end of the connecting rod is connected to the sidewall of the clamping rod.

[0011] Preferably, the film cutting mechanism includes a cross frame and a film cutting blade. A fifth sliding groove is provided on the side wall of the film cutting frame, and a fourth sliding block is provided inside the fifth sliding groove. The cross frame is disposed between the fourth sliding blocks. A contact pressure strip is provided on the bottom surface of the cross frame. A sixth sliding groove is provided inside the cross frame, and a one-way screw is provided inside the sixth sliding groove. A fifth sliding block is provided on the one-way screw, and the film cutting blade is disposed at the bottom end of the fifth sliding block. A groove is provided inside the fourth sliding block, and a second servo motor is disposed inside the groove. The output shaft of the second servo motor passes through the sixth sliding groove and is connected to the one-way screw.

[0012] Preferably, a telescopic rod is provided on the top surface of the film cutting frame, and the output end of the telescopic rod passes through the top surface of the film cutting frame and is connected to the horizontal frame.

[0013] A method of using a TPU film sampling device, characterized by comprising the following steps: S1: Pull out the positioning pin on the insert, turn the handle to drive the double-acting screw to rotate, the double-acting screw drives the clamping rods on both sides to move back and forth along the fourth slide groove, and at the same time the clamping rod at the front end of the frame drives the first slider to slide synchronously in the first slide groove through the connecting rod, thereby driving the guide frame to move horizontally, and the second slider moves synchronously with the guide frame along the first guide rod in the second slide groove until the distance between the clamping frames on both sides is greater than the unwinding roller and sampling roller to be installed. S2: Insert the insert block at one end of the unwinding roller containing the TPU film to be sampled into the clamping frame of the clamping rod on the front side. Rotate the handle to drive the bidirectional screw to rotate. The bidirectional screw drives the clamping rods on both sides to move towards each other along the fourth slide groove. At the same time, the clamping rod at the front of the frame drives the first slider to slide synchronously in the first slide groove through the connecting rod, thereby driving the guide frame to move horizontally. The second slider moves synchronously with the guide frame along the first guide rod in the second slide groove. Insert the insert block at the other end of the unwinding roller into the clamping frame of the clamping rod on the other side of the front side. The positioning is completed by inserting the limiting block inside the clamping frame into the limiting groove on the side wall of the insert block. Insert the positioning pin to lock and fix the bidirectional screw at the front. S3: Insert the insert block at one end of the empty sampling roller into the clamping frame of the clamping rod on the rear side, rotate the handle to drive the bidirectional screw to rotate, and the bidirectional screw drives the clamping rods on both sides to move towards each other along the fourth slide groove. Insert the insert block at the other end of the sampling roller into the clamping frame of the clamping rod on the rear side. The positioning is completed by inserting the limiting block inside the clamping frame into the limiting groove on the side wall of the insert block. Insert the positioning pin to lock and fix the bidirectional screw at the rear. S4: Pull the free end of the TPU film on the unwinding roller, first pass it around the first and second guide rollers of the front guide frame in sequence, then pass it through the guide frame, then through the film cutting frame, and finally pass it around the second and first guide rollers of the rear guide frame in sequence, and finally fix it on the side wall of the sampling roller. S5: During the film threading process, the third sliders on both sides of the first guide roller adapt to the displacement of the second guide rod in the third groove under the elastic action of the buffer spring, so that the first guide roller fits against the film surface and provides stable tension, ensuring that no wrinkles or excessive stretching occur during film transmission. S6: According to the preset sampling width, start the second servo motor inside the fourth slider, drive the one-way screw in the sixth slide to rotate, drive the fifth slider and the bottom cutting blade to move along the one-way screw, adjust the initial cutting position of the cutting blade, and set the rotation parameters of the first servo motor and the action interval of the cutting mechanism according to the sampling length requirements to complete the parameter preset before sampling. S7: Start the first servo motor at both ends. The output shaft of the first servo motor drives the second bevel gear to rotate. Through the meshing transmission between the first bevel gear and the second bevel gear, the rotating rod is driven to rotate. The rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, which in turn drives the unwinding roller and the sampling roller to rotate synchronously in the same direction, so as to realize the stable transmission of TPU film. S8: When the film transmission length reaches the preset sampling length, stop the first servo motor, start the telescopic rod on the top surface of the film cutting frame, and push the horizontal frame and the contact strip on the bottom surface downward until the contact strip presses the film surface. Start the second servo motor, drive the unidirectional screw to move the film cutting knife along the sixth slide groove at a uniform speed, and perform transverse cutting on the pressed TPU film. After the cutting is completed, the telescopic rod drives the horizontal frame and the film cutting knife to reset, and the film cutting knife returns to the initial cutting position. S9: Start the first servo motor at the front end. The first servo motor reverses its output shaft to drive the second bevel gear to rotate. Through the meshing transmission between the first and second bevel gears, the rotating rod is driven to rotate. The rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, thereby driving the unwinding roller to wind up the TPU film that has not been sampled. Start the first servo motor at the rear end. The first servo motor rotates its output shaft to drive the second bevel gear to rotate. Through the meshing transmission between the first and second bevel gears, the rotating rod is driven to rotate. The rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, thereby driving the sampling roller to wind up the sampled TPU film. S10: Turn off the first servo motor, stop the rotation of the unwinding roller and the sampling roller, pull out the positioning pin at the rear end, rotate the handle to make the clamping rods move in opposite directions, release the clamping limit on the sampling roller, take out the sampling roller with the sampled TPU film on it, and complete the sampling operation. S11: If continuous sampling is required, repeat S1-S9 until all sampling operations are completed. Then, reset each slider, guide roller and film cutting mechanism to its initial position, insert the positioning pin to fix the bidirectional lead screw, and turn off the power to the device.

[0014] Therefore, the present invention employs the aforementioned TPU film sampling device and method, which uses a bidirectional screw-driven clamping rod in conjunction with a locking structure of a limiting block and a limiting groove to achieve precise and stable clamping of the unwinding roller and the sampling roller. This method can adapt to rollers of different lengths, and the front and rear clamping mechanisms are independently locked to ensure the coaxiality of the rollers. The first guide roller adaptively provides stable tension force through the cooperation of a buffer spring and a slider. Combined with the limiting of the guide frame and guide box, this ensures smooth, wrinkle-free, and non-deviation-free film transmission. The film cutting mechanism adopts a "press-then-cut" design, and with the second servo motor, it precisely controls the position of the cutting blade and the rotation parameters of the roller, achieving precise control of the sampling width and length, and excellent cutting quality.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the TPU film sampling device in this invention; Figure 2 This is a schematic diagram of the specific structure of the guide frame and guide frame in this invention; Figure 3This is a schematic diagram of the specific structure of the clamping mechanism in this invention; Figure 4 This is a schematic diagram of the specific structure of the film cutting mechanism in this invention.

[0017] Figure Labels 1. Frame; 2. Unwinding roller; 3. Sampling roller; 4. Guide frame; 5. First guide roller; 6. Second guide roller; 7. First chute; 8. First slider; 9. Second chute; 10. First guide rod; 11. Second slider; 12. Guide frame; 13. Cutting frame; 14. Third chute; 15. Second guide rod; 16. Third slider; 17. Buffer spring; 18. Clamping rod; 19. Clamping frame; 20. Fourth chute; 21. Bidirectional lead screw; 22. Rotating shaft; 23. Insertion block; 24. 25. Limiting block; 26. Limiting groove; 27. Insert cylinder; 28. Rotating handle; 29. ​​Positioning pin; 30. Mounting frame; 31. Rotating rod; 32. First bevel gear; 33. Second bevel gear; 34. First servo motor; 35. Connecting rod; 36. Horizontal frame; 37. Cutting knife; 38. Fifth slide groove; 39. Fourth slider; 40. Contact pressure strip; 41. Sixth slide groove; 42. One-way lead screw; 43. Fifth slider; 44. Groove; 45. Second servo motor; 46. Telescopic rod. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1-4As shown, a TPU film sampling device is provided. Clamping mechanisms are installed at both the front and rear ends of the frame 1. The unwinding roller 2 is installed on the clamping mechanism at the front end of the frame 1, and the sampling roller 3 is installed on the clamping mechanism at the rear end of the frame 1. Guide frames 4 are installed on both the front and rear sides of the top of the frame 1. A first guide roller 5 is provided at the top of the guide frame 4, and a second guide roller 6 is inserted at the bottom of the guide frame 4. The second guide roller 6 is rotatably connected to the guide frame 4. A controller (not shown in the figure) is provided on the frame 1, and the entire device is connected to an external power supply.

[0021] A first sliding groove 7 is provided at the front end of the top surface of the frame 1. A first slider 8 is inserted inside the first sliding groove 7 and slides horizontally along the first sliding groove 7. The first slider 8 is connected to the clamping mechanism at the front end. A second sliding groove 9 is provided at the rear end of the top surface of the frame 1. A first guide rod 10 is welded inside the second sliding groove 9. A through hole is provided at the center of the second slider 11. The second slider 11 is sleeved on the first guide rod 10 through the through hole and slides horizontally along the second sliding groove 9. A guide frame 12 is welded to the top of the first slider 8 and the second slider 11. A film cutting frame 13 is installed at the rear end of the top surface of the frame 1. A film cutting mechanism is installed on the film cutting frame 13.

[0022] The guide frame 4 has a third slide groove 14 on its side wall. A second guide rod 15 is welded inside the third slide groove 14. A through hole is opened at the center of the third slider 16. The third slider 16 is sleeved on the second guide rod 15 through the through hole and slides vertically along the third slide groove 14. A first guide roller 5 is inserted between the two third sliders 16. The first guide roller 5 is rotatably connected to the third slider 16. A buffer spring 17 is welded to the bottom end of the third slider 16. The bottom end of the buffer spring 17 is in contact with the bottom surface of the inner wall of the third slide groove 14.

[0023] The front and rear side walls of the frame 1 are each provided with a fourth sliding groove 20. A double-acting lead screw 21 is inserted into the fourth sliding groove 20 and is rotatably connected to the frame 1. One end of the clamping rod 18 is provided with a threaded hole that matches the double-acting lead screw 21. The clamping rod 18 is sleeved on the double-acting lead screw 21 through the threaded hole, and the clamping rod 18 slides horizontally along the fourth sliding groove 20 in cooperation with the double-acting lead screw 21 through the threaded hole. The two clamping rods 18 can move towards or away from each other. The slider 8 is connected to the clamping rod 18 at the front end of the frame 1. A rotating shaft 22 is welded to the side wall of the clamping frame 19. The rotating shaft 22 is inserted into the side wall of the clamping rod 18 away from the fourth slide groove 20. The rotating shaft 22 is rotatably connected to the clamping rod 18. Insert blocks 23 are welded to the side walls of both ends of the unwinding roller 2 and the sampling roller 3. The unwinding roller 2 is inserted between the clamping frames 19 at the front end of the frame 1 through the insert blocks 23. The sampling roller 3 is inserted between the clamping frames 19 at the rear end of the frame 1 through the insert blocks 23.

[0024] A limiting block 24 is welded inside the clamping frame 19, and a limiting groove 25 is opened on the side wall of the insert block 23, and the limiting block 24 is inserted into the limiting groove 25.

[0025] A sleeve 26 is welded to the right side wall of the frame 1. The sleeve 26 is connected to the interior of the fourth slide groove 20. One end of the bidirectional lead screw 21 passes through the sleeve 26 and is welded with a handle 27. Insertion holes are opened on the upper and lower side walls of the sleeve 26. The part of the bidirectional lead screw 21 located inside the sleeve 26 has six insertion holes with the bidirectional lead screw 21 as the axis. The positioning pin 28 passes through the insertion holes on the upper side wall of the sleeve 26, the insertion holes on the bidirectional lead screw 21, and the insertion holes on the lower side wall of the sleeve 26 in sequence to fix the position of the bidirectional lead screw 21 and the sleeve 26, thereby fixing the position between the two clamping rods 18.

[0026] A mounting frame 29 is welded to the side wall of the clamping rod 18 on the left side. A rotating rod 30 is inserted inside the mounting frame 29. One end of the rotating rod 30 passes through the inside of the clamping rod 18 and is welded to the rotating shaft 22. A first bevel gear 31 is sleeved on the rotating rod 30 and is welded to the rotating rod 30. A second bevel gear 32 meshes with one side of the first bevel gear 31. A first servo motor 33 is mounted on the top surface of the mounting frame 29. The output shaft of the first servo motor 33 passes through the inside of the mounting frame 29 and is fixed to the second bevel gear 32. The first servo motor 33 is electrically connected to the controller through a wire.

[0027] A connecting rod 34 is welded to the side wall of the first slider 8. The first slide groove 7 is connected to the fourth slide groove 20 at the front end of the frame 1. The other end of the connecting rod 34 is welded to the side wall of the clamping rod 18.

[0028] The side wall of the film cutting frame 13 is provided with a fifth sliding groove 37, and the two ends of the horizontal frame 35 are welded with a fourth slider 38. The fourth slider 38 is inserted into the fifth sliding groove 37 and slides vertically along the fifth sliding groove 37. The bottom surface of the horizontal frame 35 is provided with a contact pressure strip 39, preferably made of rubber.

[0029] The horizontal frame 35 has a sixth sliding groove 40 inside, and a one-way lead screw 41 is inserted into the sixth sliding groove 40. The one-way lead screw 41 is rotatably connected to the horizontal frame 35. The center of the fifth slider 42 has a threaded hole that matches the one-way lead screw 41. The fifth slider 42 is sleeved on the one-way lead screw 41 through the threaded hole, and the fifth slider 42 slides horizontally along the sixth sliding groove 40 in cooperation with the one-way lead screw 41 through the threaded hole. A film cutting knife 36 is installed at the bottom end of the fifth slider 42. The fourth slider 38 has a groove 43 inside, and a second servo motor 44 is installed inside the groove 43. The output shaft of the second servo motor 44 passes through the sixth sliding groove 40 and is fixed to the one-way lead screw 41. The second servo motor 44 is electrically connected to the controller through a wire.

[0030] A telescopic rod 45 is installed on the top surface of the film cutting frame 13. The output end of the telescopic rod 45 passes through the top surface of the film cutting frame 13 and is fixed to the top surface of the horizontal frame 35. The telescopic rod 45 is electrically connected to the controller through a wire.

[0031] A method of using a TPU film sampling device, characterized by comprising the following steps: S1: Pull out the positioning pin 28 on the insert 26, rotate the handle 27 to drive the bidirectional lead screw 21 to rotate, the bidirectional lead screw 21 drives the clamping rods 18 on both sides to move in opposite directions along the fourth slide groove 20, at the same time the clamping rod 18 at the front end of the frame 1 drives the first slider 8 to slide synchronously in the first slide groove 7 through the connecting rod 34, thereby driving the guide frame 12 to move horizontally, the second slider 11 moves synchronously with the guide frame 12 along the first guide rod 10 in the second slide groove 9 until the distance between the clamping frames 19 on both sides is greater than the unwinding roller 2 and the sampling roller 3 to be installed; S2: Insert the insert block 23 at one end of the unwinding roller 2 containing the TPU film to be sampled into the clamping frame 19 of the clamping rod 18 on the front side. Rotate the handle 27 to drive the bidirectional screw 21 to rotate. The bidirectional screw 21 drives the clamping rods 18 on both sides to move towards each other along the fourth slide groove 20. At the same time, the clamping rod 18 at the front end of the frame 1 drives the first slider 8 to slide synchronously in the first slide groove 7 through the connecting rod 34, thereby driving the guide frame 12 to move horizontally. The second slider 11 moves synchronously with the guide frame 12 along the first guide rod 10 in the second slide groove 9. Insert the insert block 23 at the other end of the unwinding roller 2 into the clamping frame 19 of the clamping rod 18 on the other side of the front end. The positioning is completed by inserting the limiting block 24 inside the clamping frame 19 into the limiting groove 25 on the side wall of the insert block 23. Insert the positioning pin 28 to lock and fix the bidirectional screw 21 at the front end. S3: Insert the insert block 23 at one end of the empty sampling roller 3 into the clamping frame 19 of the clamping rod 18 on the rear side, rotate the handle 27 to drive the bidirectional screw 21 to rotate, and the bidirectional screw 21 drives the clamping rods 18 on both sides to move towards each other along the fourth slide groove 20. Insert the insert block 23 at the other end of the sampling roller 3 into the clamping frame 19 of the clamping rod 18 on the rear side. The positioning is completed by inserting the limiting block 24 inside the clamping frame 19 into the limiting groove 25 on the side wall of the insert block 23. Insert the positioning pin 28 to lock and fix the bidirectional screw 21 at the rear. S4: Pull the free end of the TPU film on the unwinding roller 2, first pass it around the first guide roller 5 and the second guide roller 6 of the front guide frame 4 in sequence, then pass it through the guide frame 12, then pass it through the film cutting frame 13, and finally pass it around the second guide roller 6 and the first guide roller 5 of the rear guide frame 4 in sequence, and finally fix it on the side wall of the sampling roller 3. S5: During the film threading process, the third sliders 16 on both sides of the first guide roller 5 are adaptively displaced along the second guide rod 15 in the third groove 14 under the elastic action of the buffer spring 17, so that the first guide roller 5 fits against the film surface and provides stable tension, ensuring that no wrinkles or excessive stretching occur during film transmission. S6: According to the preset sampling width, start the second servo motor 44 inside the fourth slider 38, drive the one-way screw 41 in the sixth slide groove 40 to rotate, drive the fifth slider 42 and the bottom cutting blade 36 to move along the one-way screw 41, adjust the initial cutting position of the cutting blade 36, and set the rotation parameters of the first servo motor 33 and the action interval of the cutting mechanism according to the sampling length requirements to complete the parameter preset before sampling; S7: Start the first servo motor 33 at both ends. The output shaft of the first servo motor 33 drives the second bevel gear 32 to rotate. Through the meshing transmission of the first bevel gear 31 and the second bevel gear 32, the rotating rod 30 is driven to rotate. The rotating rod 30 drives the rotating shaft 22 and the clamping frame 19 to rotate synchronously, thereby driving the unwinding roller 2 and the sampling roller 3 to rotate synchronously in the same direction, so as to realize the stable transmission of TPU film. S8: When the film transmission length reaches the preset sampling length, stop the first servo motor 33, start the telescopic rod 45 on the top surface of the film cutting frame 13, and push the horizontal frame 35 and the contact pressure strip 39 on the bottom surface downward until the contact pressure strip 39 presses the film surface. Start the second servo motor 44, drive the one-way screw 41 to drive the film cutting knife 36 to move at a constant speed along the sixth slide groove 40 to perform transverse cutting on the pressed TPU film. After the cutting is completed, the telescopic rod 45 drives the horizontal frame 35 and the film cutting knife 36 to reset, and the film cutting knife 36 returns to the initial cutting position. S9: Start the first servo motor 33 at the front end. The first servo motor 33 reverses its output shaft to drive the second bevel gear 32 to rotate. Through the meshing transmission between the first bevel gear 31 and the second bevel gear 32, the rotating rod 30 is driven to rotate. The rotating rod 30 drives the rotating shaft 22 and the clamping frame 19 to rotate synchronously, thereby driving the unwinding roller 2 to wind up the TPU film that has not been sampled. Start the first servo motor 33 at the rear end. The first servo motor 33 rotates its output shaft to drive the second bevel gear 32 to rotate. Through the meshing transmission between the first bevel gear 31 and the second bevel gear 32, the rotating rod 30 is driven to rotate. The rotating rod 30 drives the rotating shaft 22 and the clamping frame 19 to rotate synchronously, thereby driving the sampling roller 3 to wind up the sampled TPU film. S10: Turn off the first servo motor 33, stop the rotation of the unwinding roller 2 and the sampling roller 3, pull out the positioning pin 28 at the rear end, rotate the handle 27 to make the clamping rod 18 move in opposite directions, release the clamping limit on the sampling roller 3, take out the sampling roller 3 with the sampled TPU film, and complete the sampling operation. S11: If continuous sampling is required, repeat S1-S9 until all sampling operations are completed. Then, reset each slider, guide roller and film cutting mechanism to its initial position, insert the positioning pin 28 to fix the bidirectional lead screw 21, and turn off the power to the device.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A TPU film sampling device, characterized by: The utility model provides a kind of film cutting device, including rack, unwinding roller and sampling roller, the rack both ends are provided with clamping mechanism, the unwinding roller and sampling roller are all arranged on the clamping mechanism, the rack top surface both sides are provided with guide frame, the guide frame top is provided with first guide roller, the guide frame bottom is provided with second guide roller, the rack top surface one end is opened with first sliding slot, the first sliding slot is provided with first sliding block inside, the first sliding block is connected with the clamping mechanism, the rack top surface other end is opened with second sliding slot, the first guide rod is provided with second sliding block on the first guide rod, the first sliding block and the second sliding block between the second sliding block are provided with guide frame, the rack top surface one side is provided with film cutting frame, the film cutting frame is provided with film cutting mechanism.

2. The TPU film sampling device of claim 1, wherein: The guide frame is opened with third sliding slot, the second guide rod is provided with third sliding block on the second guide rod, the first guide roller is arranged between the two third sliding blocks, the third sliding block bottom is provided with buffer spring, the buffer spring bottom is contacted with the third sliding slot inner wall.

3. The TPU film sampling device of claim 1, wherein: The clamping mechanism includes clamping rod and clamping frame, the rack side wall is opened with fourth sliding slot, the fourth sliding slot is provided with bidirectional screw rod inside, the clamping rod one end is arranged on the bidirectional screw rod, the first sliding block is connected with the clamping rod front end, the clamping frame side wall is provided with rotating shaft, the rotating shaft is inserted into the clamping rod other end inside, the unwinding roller and sampling roller side wall are all provided with plug-in block, the plug-in block is inserted into the clamping frame inside.

4. The TPU film sampling device of claim 3, wherein: The clamping frame inside is provided with limiting block, the plug-in block side wall is opened with limiting slot, the limiting block is inserted into the limiting slot inside.

5. The TPU film sampling device of claim 3, wherein: The rack side wall is provided with insertion cylinder, the insertion cylinder is communicated with the fourth sliding slot inside, the bidirectional screw rod one end is worn out the insertion cylinder and is connected with handle, the insertion cylinder is inserted with positioning pin, the positioning pin is sequentially penetrated the insertion cylinder and bidirectional screw rod.

6. The TPU film sampling device of claim 5, wherein: One clamping rod side wall is provided with mounting frame, the mounting frame is provided with rotating rod inside, the rotating rod one end is penetrated into the clamping rod inside and is connected with the rotating shaft, the rotating rod is connected with first bevel gear, the first bevel gear one side is engaged with second bevel gear, the mounting frame top is provided with first servo motor, the first servo motor output shaft is penetrated into the mounting frame inside and is connected with the second bevel gear.

7. The TPU film sampling device of claim 3, wherein: The first sliding block side wall is provided with connecting rod, the first sliding slot is communicated with the fourth sliding slot front end, the connecting rod other end is connected with the clamping rod side wall.

8. The TPU film sampling device of claim 1, wherein: The film cutting mechanism includes horizontal frame and film cutting knife, the film cutting frame side wall is opened with fifth sliding slot, the fifth sliding slot is provided with fourth sliding block inside, the horizontal frame is arranged between the fourth sliding block, the horizontal frame bottom is provided with contact pressure strip, the horizontal frame inside is opened with sixth sliding slot, the sixth sliding slot is provided with unidirectional screw rod inside, the unidirectional screw rod is provided with fifth sliding block, the film cutting knife is arranged at the fifth sliding block bottom, the fourth sliding block inside is opened with recess, the recess is provided with second servo motor inside, the second servo motor output shaft is penetrated into the sixth sliding slot inside and is connected with the unidirectional screw rod.

9. The TPU film sampling device of claim 1, wherein: The top surface of the cutting film frame is provided with a telescopic rod, and the output end of the telescopic rod penetrates the top surface of the cutting film frame and is connected with the horizontal frame.

10. A method of using a TPU film sampling device according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1: pull out the positioning pin on the plug-in cylinder, rotate the handle to drive the bidirectional screw rod to rotate, and the bidirectional screw rod drives the clamping rods on both sides to move away from each other along the fourth sliding groove, and the clamping rods at the front end of the frame drive the first sliding block to slide in the first sliding groove synchronously through the connecting rod, thereby driving the guide frame to move horizontally, and the second sliding block moves along the first guide rod in the second sliding groove synchronously with the guide frame, until the distance between the clamping frames on both sides is greater than the installation width of the unwinding roller and the sampling roller; S2: insert the plug-in block at one end of the unwinding roller with the TPU film to be sampled into the clamping frame of the clamping rod on one side at the front end, rotate the handle to drive the bidirectional screw rod to rotate, and the bidirectional screw rod drives the clamping rods on both sides to move towards each other along the fourth sliding groove, and the clamping rods at the front end of the frame drive the first sliding block to slide in the first sliding groove synchronously through the connecting rod, thereby driving the guide frame to move horizontally, and the second sliding block moves along the first guide rod in the second sliding groove synchronously with the guide frame, insert the plug-in block at the other end of the unwinding roller into the clamping frame of the clamping rod on the other side at the front end, and complete positioning by inserting the limiting block in the clamping frame into the limiting groove in the side wall of the plug-in block, and insert the positioning pin to lock and fix the bidirectional screw rod at the front end; S3: insert the plug-in block at one end of the empty sampling roller into the clamping frame of the clamping rod on one side at the rear end, rotate the handle to drive the bidirectional screw rod to rotate, and the bidirectional screw rod drives the clamping rods on both sides to move towards each other along the fourth sliding groove, and insert the plug-in block at the other end of the sampling roller into the clamping frame of the clamping rod on the other side at the rear end, and complete positioning by inserting the limiting block in the clamping frame into the limiting groove in the side wall of the plug-in block, and insert the positioning pin to lock and fix the bidirectional screw rod at the rear end; S4: pull the free end of the TPU film on the unwinding roller, first pass through the first guide roller and the second guide roller of the front end guide frame in sequence, then pass through the guide frame, then pass through the cutting film frame, and finally pass through the second guide roller and the first guide roller of the rear end guide frame in sequence, and finally fix on the side wall of the sampling roller; S5: during the film threading process, the third sliding block on both sides of the first guide roller automatically displaces along the second guide rod in the third sliding groove under the elastic action of the buffer spring, so that the first guide roller is attached to the surface of the film and provides stable tension, and ensures that the film does not wrinkle or stretch excessively during transmission; S6: according to the preset sampling width, start the second servo motor in the fourth sliding block, drive the unidirectional screw rod in the sixth sliding groove to rotate, drive the fifth sliding block and the cutting knife at the bottom to move along the unidirectional screw rod, adjust the initial cutting position of the cutting knife, set the rotation parameters of the first servo motor and the action interval of the cutting mechanism according to the sampling length requirement, and complete the parameter preset before sampling; S7: start the first servo motor at the front end and the rear end, the output shaft of the first servo motor drives the second bevel gear to rotate, drives the rotating rod to rotate through the meshing transmission of the first bevel gear and the second bevel gear, the rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, thereby driving the unwinding roller and the sampling roller to rotate synchronously and in the same direction, and realizing the stable transmission of the TPU film. S8: When the film transmission length reaches the preset sampling length, stop the first servo motor, start the telescopic rod on the top surface of the film cutting frame, the output end of the telescopic rod pushes the horizontal frame and the bottom contact pressing strip to displace downward until the contact pressing strip presses the surface of the TPU film, start the second servo motor to drive the one-way screw rod to move the film cutting knife along the sixth sliding groove at a constant speed, cut the pressed TPU film horizontally, after cutting, the telescopic rod drives the horizontal frame and the film cutting knife to reset, and the film cutting knife returns to the initial cutting position; S9: Start the first servo motor at the front end, the first servo motor reverses the output shaft to drive the second bevel gear to rotate, drive the rotating rod to rotate through the meshing transmission of the first bevel gear and the second bevel gear, the rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, and then drives the unwinding roller to wind the TPU film which is not sampled, start the first servo motor at the rear end, the first servo motor rotates the output shaft to drive the second bevel gear to rotate, drive the rotating rod to rotate through the meshing transmission of the first bevel gear and the second bevel gear, the rotating rod drives the rotating shaft and the clamping frame to rotate synchronously, and then drives the sampling roller to wind the sampled TPU film; S10: Turn off the first servo motor to stop the rotation of the unwinding roller and the sampling roller, pull out the positioning pin at the rear end, rotate the handle to move the clamping rod away from each other, release the clamping and limiting of the sampling roller, take out the sampling roller with the sampled TPU film, and complete the sampling work; S11: If continuous sampling is needed, repeat S1-S9 until the sampling work is completed, reset each sliding block, guide roller and film cutting mechanism to the initial position, insert the positioning pin to fix the bidirectional screw rod, and turn off the power supply of the device.

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