TPU plastic film conveying control tension device

Abstract

The invention relates to a TPU plastic film conveying tension control device, and relates to the technical field of film conveying, comprising a frame, an input system, a coding sensing system, an output roller and a reeling system, wherein the input system is rotatably mounted on the frame, the output roller is rotatably mounted on the frame, the coding sensing system comprises a flip sensing device, a sensing push cylinder, a resistance device and a coding device, the flip sensing device is mounted on the frame, the motion trajectory of the flip sensing device passes between the input system and the output roller, the coding device is mounted on the frame, the coding device is transmission-connected to the flip sensing device, the coding device is electrically connected to the reeling system, the resistance device is mounted on the flip sensing device, the resistance device rubs against the input system after following the flip sensing device to rotate, the sensing push cylinder is hingedly mounted on the frame, the sensing push cylinder is transmission-connected to the flip sensing device, and tension stability can be ensured in time.

Description

Technical Field

[0001] The invention relates to the technical field of film conveying, in particular to a TPU plastic film conveying tension control device. Background Art

[0002] ‌Tension control in TPU film transportation‌ refers to the use of a series of technical means to ensure that the TPU film maintains a constant tension during transportation, thereby ensuring the quality and stability of the film, preventing the material from sliding, slipping or deforming during transportation, and ensuring dimensional accuracy and good material rolling‌.

[0003] The tension control in TPU film conveying is mainly achieved in the following ways: ‌ First, manual control‌: Control the tension by manually adjusting the excitation current of the clutch and brake. The cost is low, but the control accuracy is limited. ‌ Second, semi-automatic control‌: Control the torque of winding and unwinding by detecting the roll diameter. It is suitable for relatively stable control, but requires mechanical loss. ‌ Third, fully automatic control‌: Use a tension detection device to measure the material tension, and control the motor through a feedback system to achieve closed-loop control. The cost is high, and the adjustment of the motor speed is hindered by the rotational inertia of the conveying roller, and the adjustment speed is slow.

[0004] The TPU film conveying device usually includes the following modules: a feeding module to feed the film material evenly; a tension control module to monitor the tension state of the film in real time; a driving module to provide power to ensure that the conveying speed remains in the optimal range; a guiding module to ensure the accuracy of the film conveying path; a detection module to adjust the operation at any time to cope with changes in the external environment; a deviation correction module and a tensioning module to quickly correct any deviations and ensure that the position and state of the film remain stable throughout the entire conveying process; and a receiving module to output the finished product stably.

[0005] Existing tension control devices are difficult to achieve low-cost and high-precision control of the tension of plastic films. Summary of the invention

[0006] In order to overcome the technical defects of the prior art, the present invention provides a TPU plastic film conveying and tension control device, which can timely ensure the stability of tension at a low cost.

[0007] The technical solution adopted by the present invention is: A device for controlling the tension of a TPU plastic film conveying includes a frame, an input system, a coding sensing system, an output roller and a reeling system. The input system is rotatably mounted on the frame, and the output roller is rotatably mounted on the frame. The coding sensing system includes a flipping sensing device, a sensing push cylinder, a resistance device and a coding device. The flipping sensing device is mounted on the frame, and the motion trajectory of the flipping sensing device passes between the input system and the output roller. The coding device is mounted on the frame, and the coding device is transmission-connected to the flipping sensing device. The coding device is electrically connected to the reeling system. The resistance device is mounted on the flipping sensing device, and the resistance device rubs against the input system after following the rotation of the flipping sensing device. The sensing push cylinder is hingedly mounted on the frame, and the sensing push cylinder is transmission-connected to the flipping sensing device.

[0008] Preferably, the input system includes an input upper roller device and a lower passive roller device, the input upper roller device is installed on the frame in a liftable manner, the lower passive roller device is installed on the frame in a rotatable manner, the input upper roller device and the lower passive roller device roll in close contact with each other, and the lower passive roller device rubs against the resistance device.

[0009] Preferably, the input upper roller device comprises an upper input roller and an upper input slider, the upper input slider rises and slides along the frame, and the upper input roller is rotatably mounted on the upper input slider.

[0010] Preferably, the lower passive roller device comprises a lower passive roller and a deceleration friction plate ring mounted on the lower passive roller, the lower passive roller is rotatably mounted on the frame, and each of the deceleration friction plate rings rubs against the resistance device.

[0011] Preferably, the encoding device comprises a sensing gear, an encoder and an encoding gear, the encoding gear is mounted on the encoder, the encoding gear and the sensing gear are meshed with each other, and the sensing gear is mounted on the flip sensing device.

[0012] Preferably, the unwinding system comprises an unwinding motor and an unwinding roller, the unwinding roller is rotatably mounted on a frame, the unwinding motor is mounted on the frame, and the unwinding motor is electrically connected to the encoding device.

[0013] Preferably, the flipping sensing device includes a sensing flipping frame and a sensing roller, the sensing roller is rotatably mounted on the sensing flipping frame, the sensing flipping frame is rotatably mounted on a frame, the sensing push cylinder pushes the sensing flipping frame to rotate, and the motion trajectory of the sensing roller passes between the input system and the output roller.

[0014] Preferably, the resistance device comprises a resistance spring sheet, the resistance spring sheet is mounted on the rollover sensing device, and a friction plate for rubbing against the input system is provided on the resistance spring sheet.

[0015] The beneficial effects of the present invention are: The input system is rotatably mounted on the frame, and the input system is used to pull the film released by the unwinding system to the direction of the coding sensing system. The output roller is rotatably mounted on the frame, and the film is output from the output roller. The purpose of the TPU plastic film conveying control tension device is to accurately control the tension of the film output from the output roller. The coding sensing system includes a flip sensing device, a sensing push cylinder, a resistance device and an encoding device. The flip sensing device is mounted on the frame, and the motion trajectory of the flip sensing device passes between the input system and the output roller. The flip sensing device acts according to the tension of the film between the input system and the output roller. The air pressure entering the sensing push cylinder is constant, so that the thrust of the sensing push cylinder pushing the flip sensing device is constant. Since the tension of the film released by the unwinding system is different from the tension of the film output from the output roller, the tension of the film between the input system and the output roller will fluctuate as the unwinding proceeds, so that the film between the input system and the output roller will overcome the thrust of the sensing push cylinder, so that the flip sensing device swings on the frame, and the encoding device controls the unwinding speed of the unwinding system according to the rotation angle of the flip sensing device.

[0016] Specifically, when the tension between the input system and the output roller decreases, the flipping angle of the flipping sensing device increases. When the tension between the input system and the output roller is high, the flipping angle of the flipping sensing device decreases. The encoding device is installed on the frame, and the encoding device is connected to the flipping sensing device in a transmission manner. The encoding device senses the change in the rotation angle of the flipping sensing device. The encoding device is electrically connected to the unwinding system. The encoding device controls the unwinding system to decelerate when the rotation angle of the flipping sensing device is large. The encoding device controls the unwinding system to accelerate when the rotation angle of the flipping sensing device is small. The closer the rotation angle of the flipping sensing device is to the film between the input system and the output roller, the larger it is defined to be. The resistance device is installed on the flipping sensing device. After following the rotation of the flipping sensing device, the resistance device rubs against the input system, thereby immediately increasing the resistance to the rotation of the input system and increasing the tension in time. The sensing push cylinder is hingedly installed on the frame, and the sensing push cylinder is connected to the flipping sensing device in a transmission manner to promote the flipping sensing device to rotate, which can achieve timely guarantee of tension stability at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0019] Figure 3 It is a schematic diagram of the deceleration friction plate ring structure.

[0020] Figure 4 Schematic diagram of the coding perception system structure.

[0021] Figure 5 This is a schematic diagram of the structure of the coding sensing system after the resistance spring is deformed.

[0022] Figure 6 It is a schematic diagram of the structure of the lower passive roller.

[0023] Description of reference numerals: 1. Frame; 2. Input system; 21. Input upper roller device; 22. Lower passive roller device; 221. Lower passive roller; 222. Speed ​​reduction friction plate ring; 2221. Curved friction plate; 22211. Positioning edge; 3. Encoding sensing system; 31. Turnover sensing device; 311. Sensing turning frame; 312. Sensing roller; 32. Sensing push cylinder; 33. Resistance device; 331. Positioning slot; 34. Encoding device; 341. Sensing gear; 342. Encoder; 343. Encoding gear; 4. Output roller; 5. Unwinding system. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 — Figure 6 As shown, this embodiment provides a TPU plastic film conveying tension control device, including a frame 1, an input system 2, a coding sensing system 3, an output roller 4 and a reeling system 5, the input system 2 is rotatably installed on the frame 1, the input system 2 is used to pull the film released by the reeling system 5 to the direction of the coding sensing system 3, the output roller 4 is rotatably installed on the frame 1, and the film is output from the output roller 4. The purpose of this TPU plastic film conveying tension control device is to accurately control the tension of the film output from the output roller 4, the coding sensing system 3 includes a flip sensing device 31, a sensing push cylinder 32, a resistance device 33 and an encoding device 34, the flip sensing device 31 is installed on the frame 1, and the movement trajectory of the flip sensing device 31 passes through the input system 2 and the output roller 4. The flip sensing device 31 operates according to the tension of the film between the input system 2 and the output roller 4. Specifically, the air pressure entering the sensing push cylinder 32 is constant, so that the thrust of the sensing push cylinder 32 pushing the flip sensing device 31 is constant. Since the tension of the film released by the unwinding system 5 is different from the tension of the film output from the output roller 4, the tension of the film between the input system 2 and the output roller 4 fluctuates as the unwinding proceeds. The main purpose of the present application is essentially to overcome the above-mentioned toggling. This tension fluctuation causes the film between the input system 2 and the output roller 4 to overcome the thrust of the sensing push cylinder 32, causing the flip sensing device 31 to swing on the frame 1, and the encoding device 34 controls the unwinding speed of the unwinding system 5 according to the rotation angle of the flip sensing device 31.

[0025] Specifically, when the tension between the input system 2 and the output roller 4 decreases, the flip angle of the flip sensing device 31 increases. When the tension between the input system 2 and the output roller 4 is high, the flip angle of the flip sensing device 31 decreases. The encoding device 34 is installed on the frame 1. The encoding device 34 is transmission-connected with the flip sensing device 31. The encoding device 34 senses the change in the rotation angle of the flip sensing device 31. The encoding device 34 is electrically connected to the unwinding system 5. The encoding device 34 controls the unwinding system 5 to decelerate when the rotation angle of the flip sensing device 31 is large. The encoding device 34 controls the unwinding system 5 to The rotation angle of the rotation sensing device 31 is small and the acceleration is large. The closer the rotation angle of the flip sensing device 31 is to the film definition between the input system 2 and the output roller 4, the larger the resistance device 33 is installed on the flip sensing device 31. After following the rotation of the flip sensing device 31, the resistance device 33 rubs against the input system 2, thereby immediately increasing the resistance to the rotation of the input system 2 and increasing the tension in time. The sensing push cylinder 32 is hingedly installed on the frame 1. The sensing push cylinder 32 is connected to the flip sensing device 31 in transmission and then pushes the flip sensing device 31 to rotate, which can achieve timely guarantee of tension stability at low cost.

[0026] Please note the tension control logic of the TPU plastic film conveying control tension device. After following the rotation of the flip sensing device 31, the resistance device 33 rubs against the input system 2 to directly control the rotation speed of the input system 2. The higher the rotation degree of the flip sensing device 31, the greater the mutual friction between the resistance device 33 and the input system 2, thereby directly controlling the tension of the film output from the output roller 4. The encoding device 34 controls the unwinding speed of the unwinding system 5 according to the rotation angle of the flip sensing device 31, so that the film is released from the unwinding system 5 at the correct speed during the entire film unwinding process. Please note that the unwinding system 5 does not directly affect the tension of the film output from the output roller 4. The mutual friction between the resistance device 33 and the input system 2 is used to directly control the tension and respond quickly.

[0027] Specifically, the input system 2 includes an input upper roller device 21 and a lower passive roller device 22. The input upper roller device 21 can be raised and lowered on the frame 1, and the lower passive roller device 22 can be rotatably installed on the frame 1. The input upper roller device 21 and the lower passive roller device 22 roll in contact with each other, and the lower passive roller device 22 rubs against the resistance device 33 to prevent the film from shifting on the input upper roller device 21 and the lower passive roller device 22.

[0028] Specifically, the input upper roller device 21 includes an upper input roller and an upper input slider. The upper input slider rises and slides along the frame 1. The upper input roller is rotatably mounted on the upper input slider, so that the upper input roller is in contact with the lower passive roller device 22 and rolls.

[0029] Specifically, the lower passive roller device 22 includes a lower passive roller 221 and a deceleration friction plate ring 222 installed on the lower passive roller 221. Each deceleration friction plate ring 222 rubs against the resistance device 33. The lower passive roller 221 is rotatably installed on the frame 1. The deceleration friction plate ring 222 is used to cooperate with the resistance device 33 so that the lower passive roller device 22 obtains sufficient restraining force and timely increases the film tension. In order to increase the service life of the deceleration friction plate ring 222, a plurality of curved friction plates 2221 are installed on the surface of the deceleration friction plate ring 222 by screws, and each curved friction plate 2221 rubs against the resistance device 33.

[0030] Specifically, the encoding device 34 includes a sensing gear 341, an encoder 342 and an encoding gear 343. The encoding gear 343 is installed on the encoder 342. The encoding gear 343 and the sensing gear 341 are meshed with each other. The sensing gear 341 is installed on the flip sensing device 31. The sensing gear 341 rotates with the flip sensing device 31, thereby driving the encoding gear 343 to rotate, so that the encoder 342 senses the rotation angle of the flip sensing device 31, and then controls the unwinding system 5 to change the rotation speed.

[0031] Specifically, the unwinding system 5 includes an unwinding motor and an unwinding roller. The unwinding roller is rotatably mounted on the frame 1. The unwinding motor is mounted on the frame 1. The unwinding motor is electrically connected to the encoding device 34. The acceleration and deceleration of the unwinding system 5 are achieved by controlling the rotation speed of the unwinding roller by the unwinding motor. The unwinding motor is a servo motor. The encoder 342 controls the rotation speed of the unwinding system 5, which belongs to the prior art and will not be repeated here.

[0032] Specifically, the flip sensing device 31 includes a sensing flip frame 311 and a sensing roller 312. The sensing roller 312 is rotatably installed on the sensing flip frame 311. The sensing flip frame 311 is rotatably installed on the frame 1. The sensing push cylinder 32 pushes the sensing flip frame 311 to rotate. The movement trajectory of the sensing roller 312 passes between the input system 2 and the output roller 4, so that the sensing flip frame 311 senses the film tension between the input system 2 and the output roller 4 and rotates.

[0033] Specifically, the resistance device 33 includes a resistance spring sheet, which is installed on the flip sensing device 31. The resistance spring sheet is provided with a flat friction sheet that rubs against the input system 2. The resistance spring sheet will undergo elastic deformation according to the rotation degree of the sensing flip frame 311, thereby controlling the rotation resistance of the lower passive roller 221. The greater the rotation degree of the sensing flip frame 311, the less sufficient the film tension between the input system 2 and the output roller 4, and the greater the deformation degree of the resistance spring sheet, which immediately increases the rotation resistance of the lower passive roller 221. In this way, the film tension between the input system 2 and the output roller 4 is corrected in the first time. Since the output roller 4 rotates passively, the film tension output by the output roller 4 can be controlled. In order to facilitate the disassembly of the deceleration friction plate ring 222, the deceleration friction plate ring 222 is connected to the lower passive roller 221 through the rotation axis. The hexagonal prism with the rotating axis coinciding with that of the lower passive roller 221 is installed on the lower passive roller 221, and in order to provide positioning for the deceleration friction plate ring 222, a positioning rib 22211 is provided in the middle of each curved friction plate 2221, and a positioning groove 331 adapted to the positioning rib 22211 is provided on the straight friction plate. When the deceleration friction plate ring 222 needs to be removed, it is only necessary to pry open the resistance spring sheet and pull the deceleration friction plate ring 222 out of the hexagonal prism. When the deceleration friction plate ring 222 needs to be installed, it is only necessary to pry open the resistance spring sheet and clamp the positioning rib 22211 on the positioning groove 331. The positioning rib 22211 and the positioning groove 331 not only provide axial positioning for the deceleration friction plate ring 222, but also facilitate the heat dissipation of the deceleration friction plate ring 222 and the resistance spring sheet. On the other hand, the positioning rib 22211 and the positioning groove 331 expand the contact area and increase the friction force.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. TPU plastic film conveying and tension control device, characterized in that: The invention comprises a frame, an input system, an encoding sensing system, an output roller and an unwinding system, wherein the input system is rotatably mounted on the frame, the output roller is rotatably mounted on the frame, the encoding sensing system comprises a flip sensing device, a sensing push cylinder, a resistance device and an encoding device, the flip sensing device is mounted on the frame, the motion trajectory of the flip sensing device passes between the input system and the output roller, the encoding device is mounted on the frame, the encoding device is transmission-connected to the flip sensing device, the encoding device is electrically connected to the unwinding system, the resistance device is mounted on the flip sensing device, and the resistance device moves along the flip sensing device when following the flip sensing device. After the rotation sensing device rotates, it rubs against the input system. The sensing push cylinder is hingedly installed on the frame. The sensing push cylinder is transmission-connected with the flip sensing device. The input system includes an input upper roller device and a lower passive roller device. The input upper roller device can be lifted and lowered on the frame. The lower passive roller device can be rotatably installed on the frame. The input upper roller device and the lower passive roller device roll in contact with each other. The lower passive roller device rubs against the resistance device. The resistance device includes a resistance spring sheet. The resistance spring sheet is installed on the flip sensing device. The resistance spring sheet is provided with a straight friction sheet that rubs against the input system.

2. The TPU plastic film conveying and tensioning control device according to claim 1 is characterized in that: The input upper roller device comprises an upper input roller and an upper input slider. The upper input slider is lifted and slid along the frame, and the upper input roller is rotatably mounted on the upper input slider.

3. The TPU plastic film conveying and tension control device according to claim 1 is characterized in that: The lower passive roller device comprises a lower passive roller and a deceleration friction plate ring installed on the lower passive roller. The lower passive roller is rotatably installed on the frame, and each of the deceleration friction plate rings rubs against the resistance device.

4. The TPU plastic film conveying and tension control device according to claim 1, characterized in that: The encoding device comprises a sensing gear, an encoder and an encoding gear, wherein the encoding gear is mounted on the encoder, the encoding gear and the sensing gear are meshed with each other, and the sensing gear is mounted on the flip sensing device.

5. The TPU plastic film conveying and tension control device according to claim 1, characterized in that: The unwinding system comprises an unwinding motor and an unwinding roller, wherein the unwinding roller is rotatably mounted on a frame, the unwinding motor is mounted on the frame, and the unwinding motor is electrically connected to an encoding device.

6. The TPU plastic film conveying and tension control device according to claim 1, characterized in that: The flip sensing device includes a sensing flip frame and a sensing roller, wherein the sensing roller is rotatably mounted on the sensing flip frame, and the sensing flip frame is rotatably mounted on a frame. The sensing push cylinder pushes the sensing flip frame to rotate, and the motion trajectory of the sensing roller passes between the input system and the output roller.

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