Ripple eliminating device for polyurethane film

Abstract

The utility model discloses a corrugation eliminating device for a polyurethane film, which relates to the technical field of polyurethane films and comprises a shell and a drying unit. Three drying grooves are evenly formed in the shell, a shell plate is hinged to the top ends of the front side faces of the drying grooves, an observation window is installed on the surface of the shell plate, conveying grooves are formed in the left side face and the right side face of the shell in a penetrating mode, and adjusting units are arranged in the drying grooves. The drying unit comprises a heating pipe, two grillages and a temperature controller, the two grillages are correspondingly arranged in the drying grooves up and down, and the corrugation eliminating device for the polyurethane film performs segmented drying treatment on the polyurethane film by changing the internal temperature of the three drying grooves; in this way, ripples generated by too large temperature change in the whole drying process can be solved, and meanwhile tension adjustment is conducted on the polyurethane film in the drying process so as to offset the relaxation phenomenon caused by shrinkage of the polyurethane film.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane film technology, specifically to a ripple elimination device for polyurethane films. Background Technology

[0002] Medical-grade high-toughness waterproof and breathable polyurethane film is a new type of material widely used in the medical field. It features waterproofness, breathability, and high toughness. Medical-grade high-toughness waterproof and breathable polyurethane film is mainly made of thermoplastic polyurethane (TPU). TPU is a polymer material synthesized by reacting diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), macromolecular polyols, and chain extenders.

[0003] In the production process of polyurethane film, it is necessary to use equipment to eliminate the ripples on its surface. Most traditional elimination equipment dries the whole film. Although this drying method is efficient, it is prone to ripples due to rapid temperature changes.

[0004] This method of eliminating ripples causes the polyurethane film to dry rapidly, resulting in uneven internal stress and thus ripples that affect product quality. In addition, there is a lack of tension adjustment during the drying process. Therefore, we propose a ripple elimination device for polyurethane films. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a ripple elimination device for polyurethane film. By changing the internal temperature of three drying tanks, the polyurethane film is dried in sections. This can solve the ripples caused by excessive temperature changes during the overall drying process. At the same time, the tension is adjusted during the drying process to counteract the relaxation caused by the shrinkage of the polyurethane film. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrugation elimination device for polyurethane film, comprising a housing and a drying unit;

[0007] Shell: Three drying troughs are evenly distributed inside. A shell plate is hinged to the top of the front side of the drying trough. An observation window is installed on the surface of the shell plate. Conveying troughs are opened through the left and right sides of the shell. An adjustment unit is provided inside the drying trough.

[0008] Drying unit: includes heating tubes, racks and temperature controller. The rack has two drying chambers arranged vertically and vertically. Heating tubes are installed on the surface of the rack. The temperature controller is installed at the bottom of the front side of the shell.

[0009] The device also includes a controller, which is located on the left side of the housing. The input end of the heating element is electrically connected to the output end of the thermostat, the input end of the thermostat is electrically connected to the output end of the controller, and the input end of the controller is electrically connected to the output end of an external power source.

[0010] The temperature controller, in conjunction with the heating element, is activated to regulate the temperature inside the three drying chambers, allowing the polyurethane film to be dried and shaped at different temperatures, thereby reducing shrinkage ripples caused by localized overheating of the polyurethane film.

[0011] Furthermore, the drying unit also includes a mesh frame, a dust filter, ventilation holes, a fan frame, a fan, and a porous flow equalization plate. Four fan frames are fixed in pairs to the upper and lower sides of the drying chamber. A fan is placed inside each fan frame. The porous flow equalization plate is inserted into the frame. The ventilation holes are located on the surface of the housing and communicate with the interior of the drying chamber. The mesh frame is evenly fixed to the surface of the housing. A dust filter is inserted inside the mesh frame. The input of the fan is electrically connected to the output of the controller. Activating the fan, in conjunction with the porous flow equalization plate, evenly delivers hot air to the surface of the polyurethane film. The dust filter inside the mesh frame filters dust, preventing it from entering and affecting the processing of the polyurethane film.

[0012] Furthermore, the adjustment unit includes a guide roller, a bidirectional lead screw, a fixed base, adjustment blocks, a motor, and a tension roller. There are two guide rollers, rotatably mounted on the rear side of the drying tank, corresponding to each other. The fixed base is mounted at the bottom of the rear side of the drying tank, and a motor is fixed to the side of the fixed base. The output shaft of the motor is connected to the end of the bidirectional lead screw rotatably mounted inside the fixed base. The threads at both ends of the bidirectional lead screw are opposite. There are two adjustment blocks, each slidably mounted inside the fixed base. The screw holes in the middle of the two adjustment blocks are threaded to both ends of the bidirectional lead screw. A tension roller is rotatably mounted on the front side of the adjustment block. The input end of the motor is electrically connected to the output end of the controller. Starting the motor drives the bidirectional lead screw to rotate, thereby adjusting the position of the tension roller. This, combined with the guide roller, allows for tension adjustment according to different drying temperatures, preventing uneven tension that could cause localized shrinkage and thus form ripples or wrinkles.

[0013] Furthermore, the drying unit also includes a temperature sensor, which is uniformly fixed on the top surface of the housing. The output of the temperature sensor is electrically connected to the input of the controller. The temperature sensor can monitor the temperature inside the drying tank in real time, thereby facilitating timely adjustment.

[0014] Furthermore, the adjustment unit also includes a tension sensor, which is fixed inside a groove on the rear side of the housing. The output shaft of the tension sensor is connected to the rear end of the guide roller, and the output end of the tension sensor is electrically connected to the input end of the controller. The tension sensor can detect the tension of the polyurethane film to facilitate automatic adjustment.

[0015] Furthermore, it also includes a base and a detection camera. The base is fixed inside the right side of the drying tank, and the detection camera is snapped into the inside of the base. The input end of the detection camera is electrically connected to the output end of the controller. The detection camera inside the base can detect the surface of the polyurethane film, so that when ripples appear on the surface of the polyurethane film, personnel can be notified in time to check.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This polyurethane film corrugation elimination device has the following advantages:

[0017] 1. The temperature inside the three drying chambers is adjusted by starting the thermostat and heating tubes, so that the polyurethane film is dried and shaped at different temperatures. The fan is started and the porous flow equalization plate is used to deliver hot air evenly into the surface of the polyurethane film to reduce shrinkage ripples caused by local overheating of the polyurethane film.

[0018] 2. The position of the tension roller is adjusted by starting the motor to drive the bidirectional lead screw to rotate. This, together with the guide roller, can adjust the tension according to different drying temperatures, thereby preventing uneven tension that causes local shrinkage and thus forms ripples or wrinkles. The tension sensor can detect the tension of the polyurethane film for easy automatic adjustment.

[0019] 3. The temperature sensor can monitor the temperature inside the drying tank in real time, allowing for convenient and timely adjustments. The detection camera inside the machine base can detect the surface of the polyurethane film, so that personnel can be notified in time when ripples appear on the surface of the polyurethane film. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;

[0022] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0023] In the diagram: 1. Shell, 2. Drying unit, 21. Heating tube, 22. Plate frame, 23. Temperature controller, 24. Mesh frame, 25. Dust filter, 26. Ventilation hole, 27. Fan frame, 28. Fan, 29. Perforated flow equalization plate, 210. Temperature sensor, 3. Adjustment unit, 31. Guide roller, 32. Bidirectional lead screw, 33. Fixing base, 34. Adjustment block, 35. Motor, 36. Tension roller, 37. Tension sensor, 4. Drying tank, 5. Shell plate, 6. Observation window, 7. Conveying trough, 8. Machine base, 9. Detection camera, 10. Controller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-3 This embodiment provides a technical solution: a ripple elimination device for polyurethane film, comprising a housing 1 and a drying unit 2;

[0026] Shell 1: Three drying troughs 4 are evenly distributed inside. A shell plate 5 is hinged to the top of the front side of the drying trough 4. An observation window 6 is installed on the surface of the shell plate 5. Conveying grooves 7 are opened through the left and right sides of the shell 1. An adjustment unit 3 is provided inside the drying trough 4. The adjustment unit 3 includes a guide roller 31, a bidirectional lead screw 32, a fixed seat 33, an adjustment block 34, a motor 35, and a tension roller 36. There are two guide rollers 31, which are rotatably installed on the rear side inside the drying trough 4. The fixed seat 33 is installed at the bottom of the rear side inside the drying trough 4. The motor 35 is fixed on the side of the fixed seat 33. The output shaft of the motor 35 is connected to the end of the bidirectional lead screw 32, which is rotatably installed inside the fixed seat 33. The threads at both ends of the bidirectional lead screw 32 are opposite. There are two adjustment blocks 34, which are slidably installed inside the fixed seat 33. The screw holes in the middle of block 34 are threaded to both ends of the bidirectional lead screw 32. The tension roller 36 is rotatably mounted on the front side of the adjusting block 34. The input end of the motor 35 is electrically connected to the output end of the controller 10. The motor 35 is started to drive the bidirectional lead screw 32 to rotate to adjust the position of the tension roller 36. In this way, the tension of the guide roller 31 can be adjusted according to the different drying temperatures, thereby preventing uneven tension from causing local shrinkage and forming ripples or wrinkles. The adjusting unit 3 also includes a tension sensor 37. The tension sensor 37 is fixed inside the groove on the rear side of the housing 1. The output shaft of the tension sensor 37 is connected to the rear end of the guide roller 31. The output end of the tension sensor 37 is electrically connected to the input end of the controller 10. The tension sensor 37 can detect the tension of the polyurethane film to facilitate automatic adjustment.

[0027] Drying unit 2 includes heating tubes 21, a frame 22, and a temperature controller 23. The frame 22 has two drying chambers 4 arranged vertically and vertically. Heating tubes 21 are installed on the surface of the frame 22. The temperature controller 23 is installed at the bottom of the front side of the shell 5. Drying unit 2 also includes a mesh frame 24, a dust filter 25, ventilation holes 26, a fan frame 27, a fan 28, and a perforated flow equalization plate 29. There are four fan frames 27, which are fixed in pairs on the upper and lower sides of the drying chambers 4. The fan 28 is placed inside the fan frame 27. The perforated flow equalization plate 29 is inserted into the frame 22. Vents 26 are opened on the surface of the shell 1 and communicate with the inside of the drying chambers 4. The mesh frame 24 is evenly fixed on the shell 5. On the surface of body 1, a dust filter 25 is inserted inside the mesh frame 24. The input end of the fan 28 is electrically connected to the output end of the controller 10. When the fan 28 is started, it works with the porous flow equalization plate 29 to evenly deliver hot air into the surface of the polyurethane film. The dust filter 25 inside the mesh frame 24 can filter dust to prevent dust from entering and affecting the processing of the polyurethane film. The drying unit 2 also includes a temperature sensor 210. The temperature sensor 210 is evenly fixed on the top surface of the housing 1. The output end of the temperature sensor 210 is electrically connected to the input end of the controller 10. The temperature sensor 210 can monitor the temperature inside the drying tank 4 in real time, so as to facilitate timely adjustment.

[0028] The system also includes a controller 10, located on the left side of the housing 1. The input end of the heating tube 21 is electrically connected to the output end of the temperature controller 23, which in turn is electrically connected to the output end of the controller 10. The input end of the controller 10 is electrically connected to the output end of an external power supply. The temperature controller 23, in conjunction with the heating tube 21, adjusts the temperature inside the three drying chambers 4 to dry and shape the polyurethane film at different temperatures, thereby reducing shrinkage ripples caused by localized overheating of the polyurethane film. The system also includes a base 8 and a detection camera 9. The base 8 is fixed to the right side inside the drying chamber 4, and the detection camera 9 is snapped into the inside of the base 8. The input end of the detection camera 9 is electrically connected to the output end of the controller 10. The detection camera 9 inside the base 8 can detect the surface of the polyurethane film, so that personnel can be notified in time when ripples appear on the surface of the polyurethane film.

[0029] The working principle of the polyurethane film corrugation elimination device provided by this utility model is as follows: First, the polyurethane film enters the housing 1. The temperature controller 23, in conjunction with the heating tube 21, adjusts the temperature inside the three drying chambers 4. The fan 28, in conjunction with the porous flow equalization plate 29, evenly delivers hot air to the surface of the polyurethane film. The dust filter 25 inside the mesh frame 24 filters dust to prevent it from affecting the processing of the polyurethane film. This allows the polyurethane film to be dried and shaped at different temperatures, reducing shrinkage corrugations caused by localized overheating of the polyurethane film. A temperature sensor is also included. 210 can monitor the temperature inside the drying tank 4 in real time, so as to facilitate timely adjustment. At the same time, the motor 35 is started to drive the bidirectional lead screw 32 to rotate to adjust the position of the tension roller 36. In this way, the guide roller 31 can adjust the tension according to different drying temperatures, thereby preventing uneven tension from causing local shrinkage, which in turn forms ripples or wrinkles. The tension sensor 37 can detect the tension of the polyurethane film for automatic adjustment. Finally, the detection camera 9 inside the machine base 8 can detect the surface of the polyurethane film, so that when ripples appear on the surface of the polyurethane film, personnel can be notified in time to check.

[0030] It is worth noting that the controller 10 disclosed in the above embodiments is model KV-8000, while the temperature controller 23 can be freely configured according to the actual application scenario. It is recommended to use the model OHR-E300 temperature controller. The detection camera 9 can be model acA2000-165uc, and the tension sensor 37 can be model LSB200 tension sensor. The controller 10 controls the operation of the temperature controller 23, fan 28, temperature sensor 210, motor 35, tension sensor 37, and detection camera 9 using methods commonly used in the prior art.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A corrugation elimination device for polyurethane films, characterized in that: It includes a housing (1) and a drying unit (2); Shell (1): Three drying troughs (4) are evenly distributed inside. A shell plate (5) is hinged to the top of the front side of the drying trough (4). An observation window (6) is installed on the surface of the shell plate (5). A conveying trough (7) is provided through the left and right sides of the shell (1). An adjustment unit (3) is provided inside the drying trough (4). Drying unit (2): includes heating tube (21), plate frame (22) and temperature controller (23). The plate frame (22) has two drying tanks (4) arranged vertically and vertically. The heating tube (21) is installed on the surface of the plate frame (22). The temperature controller (23) is installed at the bottom of the front side of the shell plate (5). The device also includes a controller (10), which is located on the left side of the housing (1). The input end of the heating tube (21) is electrically connected to the output end of the thermostat (23), the input end of the thermostat (23) is electrically connected to the output end of the controller (10), and the input end of the controller (10) is electrically connected to the output end of an external power source.

2. The ripple elimination device for polyurethane films according to claim 1, characterized in that: The drying unit (2) also includes a mesh frame (24), a dust filter (25), a ventilation hole (26), a fan frame (27), a fan (28), and a porous flow equalization plate (29). There are four fan frames (27), which are fixed in pairs on the upper and lower sides inside the drying tank (4). The fan (28) is placed inside the fan frame (27). The porous flow equalization plate (29) is inserted into the plate frame (22). The ventilation hole (26) is opened on the surface of the shell (1) and communicates with the inside of the drying tank (4). The mesh frame (24) is evenly fixed on the surface of the shell (1). The dust filter (25) is inserted inside the mesh frame (24). The input end of the fan (28) is electrically connected to the output end of the controller (10).

3. The ripple elimination device for polyurethane films according to claim 1, characterized in that: The adjustment unit (3) includes a guide roller (31), a bidirectional lead screw (32), a fixed seat (33), an adjustment block (34), a motor (35), and a tension roller (36). There are two guide rollers (31) that are rotatably mounted inside the drying tank (4) in a left-right correspondence. The fixed seat (33) is mounted at the bottom of the rear side inside the drying tank (4). The motor (35) is fixed on the side of the fixed seat (33). The output shaft of the motor (35) is connected to the end of the bidirectional lead screw (32) that is rotatably mounted inside the fixed seat (33). The threads at both ends of the bidirectional lead screw (32) are opposite. There are two adjustment blocks (34) that are slidably mounted inside the fixed seat (33). The screw holes in the middle of the two adjustment blocks (34) are respectively threaded to the two ends of the bidirectional lead screw (32). The tension roller (36) is rotatably mounted on the front side of the adjustment block (34). The input end of the motor (35) is electrically connected to the output end of the controller (10).

4. The ripple elimination device for polyurethane film according to claim 1, characterized in that: The drying unit (2) also includes a temperature sensor (210), which is uniformly fixed on the top surface of the housing (1), and the output end of the temperature sensor (210) is electrically connected to the input end of the controller (10).

5. The ripple elimination device for polyurethane films according to claim 3, characterized in that: The adjustment unit (3) also includes a tension sensor (37), which is fixed inside the groove on the rear side of the housing (1). The output shaft of the tension sensor (37) is connected to the rear end of the guide roller (31), and the output end of the tension sensor (37) is electrically connected to the input end of the controller (10).

6. The ripple elimination device for polyurethane films according to claim 1, characterized in that: It also includes a base (8) and a detection camera (9). The base (8) is fixed inside the right side of the drying tank (4). The detection camera (9) is snapped into the inside of the base (8). The input end of the detection camera (9) is electrically connected to the output end of the controller (10).

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