Efficient extension equipment for polyimide film production

Abstract

The invention relates to efficient extension equipment for polyimide film production. The efficient extension equipment comprises an air suction device, an extrusion device, an air suction machine, a cooling roller, an air injection part and the like. According to the equipment, the power of the air suction machine and the air injection machine is accurately controlled, the temperature and air flow of a film in the production process are adjusted in real time, and the temperature stability and uniformity in the film extension process are ensured. The upper portion of the air suction device is connected with an extrusion device and an air suction machine, the lower portion of the air suction device is provided with an air suction panel and a discharging port, a first cooling roller is installed below the air suction panel, and a second cooling roller is arranged on one side of the first cooling roller and provided with an air injection part to enhance the cooling effect. The control system monitors temperature data in real time and dynamically adjusts the power of each part of equipment, so that the film quality is accurately controlled, and the uniformity of the film is effectively improved.

Description

Technical Field

[0001] The present invention relates to an efficient stretching device for the production of polyimide films. Background Art

[0002] Polyimide films have excellent high-temperature resistance, corrosion resistance, insulation properties and mechanical strength, and are widely used in fields such as aerospace, electronic equipment and high-performance materials. The production process of polyimide films has extremely high requirements for equipment, especially during the film stretching process. In order to achieve high-quality polyimide films, efficient stretching equipment needs to be used during the production process to ensure the uniformity, smoothness and high stability of the films.

[0003] In the prior art, this type of equipment includes a device for detecting the thickness of the stretched film for cooling to avoid waste of materials. By adjusting the speed of, for example, an extruder, such as adjusting the rotational speed of the screw of the extruder, is a method of adjusting the thickness, but the deviation of this method of control is relatively large.

[0004] Therefore, how to design an efficient stretching device that can precisely control the thickness of polyimide films is a problem that those skilled in the art need to solve. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned deficiencies of the prior art, and to provide an efficient stretching device for the production of polyimide films. By setting an air suction machine, a jet machine, a first temperature sensor and a second temperature sensor, and precisely controlling through a controller, the effect of efficiently controlling the film thickness is achieved. The purpose of the present invention is achieved as follows:

[0006] The present invention provides an efficient stretching device for the production of polyimide films, including an air suction device. An extrusion device and an air suction machine are installed on the upper part of the air suction device. An air suction panel and a discharge port are installed on the lower part of the air suction device. The air suction panel is connected to the air suction machine through a pipeline. The discharge port is connected to the extrusion device through a pipeline. A first cooling roller is installed on the lower part of the air suction panel. A first cooling device is provided on the side of the air suction device. A fixed rod is rotatably installed on the first cooling device, and the fixed rod is in close contact with the first cooling roller. A second cooling roller is provided on one side of the first cooling roller. The second cooling roller includes a first roller body, a second roller body and a jet part. The first roller body and the second roller body are connected through the jet part. The diameter of the jet part is smaller than the diameter of the first roller body. A plurality of jet holes are provided on the jet part, and the jet holes are connected and installed with a jet machine. A plurality of air guiding channels are provided on the outer side of the first roller body. The air suction machine, the jet machine, the first temperature sensor and the second temperature sensor are all electrically connected to a controller, and the controller is configured to control the power of the air suction machine and the jet machine according to the data of the first temperature sensor and the second temperature sensor.

[0007] To further increase the temperature detection range, a first temperature sensor is provided on the lower side of the suction device. The first temperature sensor is oriented towards the fixed rod and is slidably mounted on the support rail.

[0008] To further increase the temperature detection range, a second temperature sensor is provided on the left side of the suction device. The second temperature sensor is oriented towards the suction device and is slidably mounted on the support rail.

[0009] To further improve the use efficiency and control accuracy of the suction machine, the suction machine includes at least three electric motors arranged in parallel. Each electric motor is connected to a fan, and the electric motors are respectively controlled by a controller.

[0010] To further improve the control precision of the basic device, the extrusion device includes an extrusion rod and an extrusion head, and the power of the extrusion rod is controlled by a controller.

[0011] Furthermore, the first temperature sensor and the second temperature sensor are powered by a controller, and the data of the first temperature sensor and the second temperature sensor are transmitted to the controller through a data line.

[0012] To further increase the compactness of the device, the second cooling roller includes an air inlet. The air inlet penetrates the second cooling roller and is communicated with an air jet port, and the air inlet is communicated with an air jet machine.

[0013] To further improve the uniformity of the air jet, there are 8 air guiding channels, and the air guiding channels are equidistantly arranged circumferentially.

[0014] To further improve the uniformity of the air jet, the vertical cross-sectional diameter of the air guiding channel is 1 - 1.2 cm, and the center of the vertical cross-section of the air guiding channel is located on the circumferential surface of the cross-section of the second cooling roller.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the synergistic effect of the first cooling roller, the second cooling roller, the suction machine and the air jet machine, the cooling efficiency is effectively improved. Especially during the film extension process, the suction machine and the air jet machine can accurately adjust the cooling temperature, the cooling rate and the film thickness by using air pressure, ensuring that the film cools down quickly during the forming process without quality defects such as uneven thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural principle diagram of an efficient extension device for polyimide film production;

[0017] Figure 2 is a vertical cross-sectional view of the first cooling device of an efficient extension device for polyimide film production;

[0018] Figure 3 It is a side view schematic diagram of an efficient stretching device for polyimide film production;

[0019] Figure 4 It is a three - dimensional view schematic diagram of the second cooling roller of an efficient stretching device for polyimide film production;

[0020] Figure 5 It is a front view schematic diagram of the second cooling roller of an efficient stretching device for polyimide film production;

[0021] In the figure: 1. Extrusion device, 2. Suction panel, 3. Discharge port, 4. First cooling device, 5. Fixed rod, 6. First temperature sensor, 7. First cooling roller, 8. Second cooling roller, 9. Suction machine, 10. Second temperature sensor, 11. Air intake duct, 12. Air inlet, 13. Jet, 15. First roller body, 16. Second roller body, 17. Jet part, 18. Controller, 19. Suction device, 20. Jet port. Detailed implementation manners

[0022] To deepen the understanding of the present invention, the present invention will be further described in detail below in combination with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0023] Please refer to Figures 1-5, an embodiment of the present invention provides an efficient stretching device for polyimide film production, including an air suction device 19. An extrusion device 1 and an air suction machine 9 are installed on the upper part of the air suction device 19. An air suction panel 2 and a discharge port 3 are installed on the lower part of the air suction device 19. The air suction panel 2 is connected to the air suction machine 9 through a pipeline, and the discharge port 3 is connected to the extrusion device 1 through a pipeline. A first cooling roll 7 is installed on the lower part of the air suction panel 2. A first cooling device 4 is provided on the side of the air suction device 19. A fixed rod 5 is rotatably installed on the first cooling device 4, and the fixed rod 5 is in close contact with the first cooling roll 7. A second cooling roll 8 is provided on one side of the first cooling roll 7. The second cooling roll 8 includes a first roll body 15, a second roll body 16 and a jet part 17. The first roll body 15 and the second roll body 16 are connected through the jet part 17. The diameter of the jet part 17 is smaller than the diameter of the first roll body 15. A plurality of jet ports 20 are provided on the jet part 17, and the jet ports 20 are connected and installed with a jet machine 13. A plurality of air guiding channels 11 are provided on the outer side of the first roll body 15. The air suction machine 9, the jet machine 13, the first temperature sensor 6 and the second temperature sensor 10 are all electrically connected to a controller 18. The controller 18 is configured to control the power of the air suction machine 9 and the jet machine 13 according to the data of the first temperature sensor 6 and the second temperature sensor 10. By setting the air suction machine 9, the jet machine 13, the first temperature sensor 6 and the second temperature sensor 10, and through precise control of the controller 18, the effect of efficiently controlling the film thickness is achieved.

[0024] In a possible usage scenario, the extrusion device 1 extrudes the polyimide raw material in a high-temperature state to form a film. When the film starts to take shape after passing through the first cooling device 4, the suction device 19 is activated. The suction machine 9 sucks in air through the suction panel 2 to form a raised gap between the film and the first cooling roller 7, so as to help further extend, cool, and stretch the film. The controller 18 monitors the temperature of the film in real time according to the data of the first temperature sensor 6 and the second temperature sensor 10. When the temperature of the film exceeds the set range, the controller 18 forms a larger gap by adjusting the power of the suction machine 9 to enhance the stretching and cooling effect. During the film forming process, the first cooling roller 7 is used to contact and cool the film to ensure that the surface of the film reaches the required thickness and stability. To improve the cooling efficiency and further enhance the controllability, the second cooling roller 8 is arranged beside the first cooling roller 7 and combines with the air jet part 17 for air jet cooling. An air guide channel 11 is provided on the outer side of the second cooling roller 8, which can introduce the air flow from the air jet part 17. The air flow will evenly blow between the second cooling roller and the film. With such a design, the film is further extended, cooled, and stretched to achieve a more precise thickness. For example, when the temperature of the film is too high, the controller 18 will increase the power of the air jet machine 13 to activate the air jet part 17 for the film, to prevent warping or unevenness on the surface of the film due to uneven cooling. Among them, the first cooling device 4 corresponds to the discharge port 3, and pre-cures the melt coming out of the extrusion device 1 through the fixing rod 5. The film processed by this device can directly enter the subsequent cutting process. Additionally, there are four air jet ports 20, which are axially and equidistantly arranged on the outer side of the air jet part 17.

[0025] In an embodiment, to further increase the temperature detection range, a first temperature sensor 6 is provided on the lower side of the suction device 19. The first temperature sensor 6 is arranged facing the fixing rod 5, and the first temperature sensor 6 is slidably mounted on the support rail.

[0026] In an embodiment, to further increase the temperature detection range, a second temperature sensor 10 is provided on the left side of the suction device 19. The second temperature sensor 10 is arranged facing the suction device 19, and the first temperature sensor 6 is slidably mounted on the support rail.

[0027] Specifically, the support rail enables the temperature sensor to move along the width direction of the film, ensuring that the temperature of each section of the film can be accurately monitored. As the film advances in the device, the temperature sensor will feedback data in real time, and the controller 18 dynamically adjusts the working states of various parts of the device based on these data. For example, when the temperature of a certain section of the film rises or the cooling is insufficient, the controller 18 will adjust the power of the suction machine 9 or the air jet machine 13 to ensure that the temperature of the film is uniform throughout the extension process.

[0028] In one embodiment, in order to further improve the usage efficiency and control accuracy of the air suction machine 9, the air suction machine 9 includes at least three electric motors arranged in parallel, each electric motor is connected with a fan, and the electric motors are respectively controlled by a controller 18. With such a design, when the temperature of a certain section of the thin film rises or the cooling is insufficient, the power of a specific fan can be specifically controlled, reducing the probability of uneven thickness at some positions in the thin film. Specifically, between the air suction machine 9 and the air outlet of the air suction panel 2, there are at least three pipes for air outlet to correspond to the electric motors arranged in parallel.

[0029] In one embodiment, in order to further improve the control accuracy of the basic device, the extrusion device 1 includes an extrusion rod and an extrusion head, and the power of the extrusion rod is controlled by a controller 18.

[0030] In one embodiment, the first temperature sensor 6 and the second temperature sensor 10 are powered by a controller 18, and the data of the first temperature sensor 6 and the second temperature sensor 10 are transmitted to the controller 18 through a data line.

[0031] In one embodiment, in order to further increase the compactness of the device, the second cooling roll 8 includes an air inlet 12, the air inlet 12 penetrates through the second cooling roll 8 and is communicated with an air jet port 20, and the air inlet 12 is communicated with an air jet machine 13.

[0032] In one embodiment, in order to further improve the uniformity of air jet, there are 8 air guiding channels 11, and the air guiding channels 11 are arranged at equal circumferential intervals.

[0033] In one embodiment, in order to further improve the uniformity of air jet, the vertical section diameter of the air guiding channel 11 is 1 - 1.2 cm, and the center of the vertical section of the air guiding channel 11 is located on the circumferential of the section of the second cooling roll 8.

[0034] 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 the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An efficient stretching device for the production of polyimide films, characterized in that, It includes an air suction device, on the upper part of which an extrusion device and an air suction machine are installed. On the lower part of the air suction device, an air suction panel and a discharge port are installed. The air suction panel is connected to the air suction machine through a pipeline, and the discharge port is connected to the extrusion device through a pipeline. A first cooling roller is installed on the lower part of the air suction panel. A first cooling device is provided on the side of the air suction device. The fixed rod is rotatably installed on the first cooling device and is in close contact with the first cooling roller. A second cooling roller is provided on one side of the first cooling roller. The second cooling roller includes a first roller body, a second roller body, and a jetting part. The first roller body and the second roller body are connected by the jetting part. The diameter of the jetting part is smaller than that of the first roller body. A plurality of jetting ports are provided on the jetting part, and the jetting ports are connected and installed to a jetting machine. A plurality of air guiding channels are provided on the outer side of the first roller body. The air suction machine, the jetting machine, the first temperature sensor, and the second temperature sensor are all electrically connected to a controller. The controller is configured to control the power of the air suction machine and the jetting machine according to the data of the first temperature sensor and the second temperature sensor.

2. The high-efficiency stretching device for polyimide film production according to claim 1, wherein, A first temperature sensor is provided on the lower side of the air suction device. The first temperature sensor is oriented towards the fixed rod and is slidably installed on a support track.

3. The high-efficiency stretching device for polyimide film production according to claim 2, characterized in that, A second temperature sensor is provided on the left side of the air suction device. The second temperature sensor is oriented towards the air suction device and is slidably installed on a support track.

4. The highly efficient stretching device for polyimide film production according to claim 1, wherein, The air suction machine includes at least three electric motors arranged in parallel. Each electric motor is connected to a fan, and the electric motors are respectively controlled by a controller.

5. The high-efficiency stretching device for polyimide film production according to claim 1, characterized in that, The extrusion device includes an extrusion rod and an extrusion head, and the power of the extrusion rod is controlled by a controller.

6. The high-efficiency stretching device for polyimide film production according to claim 1, characterized in that, The first temperature sensor and the second temperature sensor are powered by a controller, and the data of the first temperature sensor and the second temperature sensor are transmitted to the controller through a data line.

7. An efficient stretching device for polyimide film production according to claim 1, characterized in that, The second cooling roller includes an air inlet, which penetrates the second cooling roller and is connected to the jetting port, and the air inlet is connected to the jetting machine.

8. An efficient stretching device for the production of polyimide films according to claim 1, characterized in that, There are 8 air guiding channels, and the air guiding channels are circumferentially equidistantly arranged.

9. The highly efficient stretching device for polyimide film production according to claim 8, characterized in that, The vertical cross-sectional diameter of the air guiding channel is 1 - 1.2 cm, and the center of the vertical cross-section of the air guiding channel is located on the circumferential surface of the cross-section of the second cooling roller.

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