A polyimide film temperature control device

Abstract

The application discloses a kind of polyimide film temperature control device, including temperature control box, several temperature control rollers are arranged in the temperature control box, the temperature control roller includes inner roller body and outer roller body, a circle of protruding mounting block is arranged at the middle position of the inner roller body, the outer roller body is set as barrel structure, and the outer roller body is composed of two half-cylinders of upper and lower, two half-cylinders are sleeved on the outside of outer roller body, and are fixed on mounting block by fixing member, so that outer roller body is detachably sleeved on the outside of inner roller body, and there is annular installation gap between outer roller body and inner roller body, and installation gap is located on both sides of mounting block.In the application, the outer roller body on the outside can be directly disassembled, after disassembly, the position of the heating rod on the inside circle is exposed, which facilitates maintenance and replacement of heating rod.

Description

Technical Field

[0001] This invention belongs to the field of polyimide film production technology, and specifically relates to a polyimide film temperature control device. Background Technology

[0002] In the existing polyimide film manufacturing process, most polyimide materials are cast onto a conveyor belt using a casting machine. The conveyor belt then passes through a drying and curing device to dry and harden the liquid material into a film, forming a polyimide film. During this process, the drying equipment usually needs to be equipped with a temperature control device to control the internal temperature changes in order to better dry the film.

[0003] In existing technologies, heating mechanisms are often installed directly inside the temperature control box to heat the air inside the entire box. This method results in an excessively large heating range and wastes too much energy.

[0004] Some equipment is equipped with a hot air blowing device that blows air onto the film. This heating method can only heat from the outside in, and the bottom of the film is not easily heated and hardened. The film is easy to stick to the conveyor belt, causing adhesion. Moreover, the heating range is uneven, and there are easy dead corners.

[0005] In existing technologies, there are also methods that directly set heating mechanisms on the drive rollers. Usually, the drive rollers are heated by circulating hot oil or circulating hot water. This method can directly heat the film through the drive rollers, and the film is heated directly from the bottom layer. The film dries and hardens well, and it is also very easy to detach from the conveyor belt without sticking.

[0006] However, the disadvantages of the above structure are that, on the one hand, the structure is relatively complex, requiring mechanical oil seals and sealed bearings to be installed inside the roller shaft, and disassembly and maintenance are inconvenient when damaged, and a separate hot oil or hot water circulation system is required; on the other hand, when the temperature needs to be adjusted, the temperature of the circulating hot oil or circulating hot water needs to be adjusted first, and then the transmission roller is heated by oil or water, which is not timely and the temperature control is inaccurate and untimely.

[0007] Therefore, in order to solve the above-mentioned technical problems, it is necessary to develop a polyimide film temperature control device that can control temperature in a timely and accurate manner and make reasonable use of heat sources. Summary of the Invention

[0008] Technical Problem: In view of the above-mentioned problems existing in the prior art, the technical problem to be solved by the present invention is to provide a polyimide film temperature control device.

[0009] Technical Solution: To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] A polyimide film temperature control device includes a temperature control box containing several temperature control rollers. Each temperature control roller includes an inner roller body and an outer roller body. A raised mounting block is provided at the middle position of the inner roller body. The outer roller body is a cylindrical structure composed of two semi-cylindrical bodies, one above the other. The two semi-cylindrical bodies are fitted onto the outside of the outer roller body and fixed to the mounting block by fasteners, allowing the outer roller body to be detachably fitted onto the outside of the inner roller body. A circumferential mounting gap is provided between the outer roller body and the inner roller body, with the mounting gap located on both sides of the mounting block.

[0011] Each temperature control roller is equipped with a mounting base on both sides, which is supported and fixed by a support rod. A drive device is installed in the mounting base on both sides. The drive rod of the drive device is connected to the inner roller body in the middle, which can drive the inner roller body and the outer roller body to rotate together. A heating rod is installed in the mounting base on both sides. The heating rod is arranged horizontally and its position corresponds to the position of the installation gap between the inner roller body and the outer roller body in a circumferential direction. The heating rod extends into the installation gap and is suspended in the air.

[0012] When the heating rod is powered on, it can heat the outer roller body. The outer roller body is detachable and can be installed separately. When the inner roller body and the outer roller body rotate under the drive of the drive device, the heating rod inside will not affect the rotation of the overall temperature control roller. The film to be dried is pressed on the outer roller body outside the temperature control roller and is conveyed through the outer roller body.

[0013] Preferably, the outer roller body is also provided with evenly spaced exhaust holes, which extend inward and are connected to the installation gap, allowing the hot air generated in the installation gap to escape outward from the exhaust holes.

[0014] Preferably, each temperature control roller is also provided with a diversion tube on its outer side. The diversion tube is fitted onto the outer side of the temperature control roller, and a diversion gap is left between the diversion tube and the temperature control roller. The diversion tube is also provided with a diversion notch. The position and size of the diversion notch correspond to the position of the film conveyed on the temperature control roller and the size of the area it occupies. The hot air in the installation gap is discharged from the exhaust hole into the outer diversion tube, and then introduced into the film position on the temperature control roller for heating under the action of the diversion tube.

[0015] Preferably, the length of the diversion tube is greater than that of the temperature control roller.

[0016] Preferably, the direction of the diversion tube is different depending on the position of the film on each temperature control roller. The diversion tube is installed on the bottom or top side of the temperature control box by means of a tripod. The size of the diversion notch on the diversion tube is determined according to the actual installation position of the temperature control roller.

[0017] Preferably, a monitoring gap is left between the mounting bases on both sides and the side walls of the temperature control roller, and a temperature sensor is installed in the monitoring gap to monitor the temperature data in real time.

[0018] Preferably, the device also includes a power supply module and a temperature control module. The temperature control module is connected to a temperature sensor and can control the heating power of the heating rod accordingly.

[0019] Preferably, the fixing component is a screw, and corresponding screw holes are provided at the middle position of the outer roller body and on the mounting block. The outer roller body is fixed to the mounting block by the screw, and the screws are evenly spaced.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0021] 1) The temperature control roller of the present invention is heated by directly heating the roller body, but its specific structure is different from that of traditional hot oil circulation heating. The temperature control roller of the present invention is set with an inner and an outer roller body. The outer roller body is installed in correspondence with the inner roller body through a ring of mounting blocks raised on the inner roller body. In this way, there is an installation gap between the inner and outer roller bodies, and the heating rod can be placed in the installation gap. The outer roller body is set as two semi-circular cylindrical structures. After this setting, the outer roller body can be directly disassembled. After disassembly, the position of the heating rod on the inner ring is exposed, which is convenient for maintenance and replacement of the heating rod.

[0022] 2) In this invention, after an installation gap is formed between the inner and outer rollers, a driving mechanism is provided on the mounting seats on both sides. The driving mechanism is connected to the inner roller from both sides, and a heating rod is provided on the mounting seat. The heating rod extends laterally into the installation gap in a smooth manner. The installation gap is circumferentially set, and the heating rod is arranged in a circumferential manner. After this setting, the internal heating rod does not move and will not affect the rotation of the temperature control roller. Moreover, the heat generated by the heating rod can directly heat the temperature control roller. Compared with the traditional circulating oil seal structure, the structure is much simpler and very ingenious and reasonable.

[0023] 3) In this device, the temperature control roller is directly heated by heating rods, so the entire film can be heated directly from the bottom, resulting in higher film curing quality; moreover, the heating rods are set on both sides of the device, extending inward from both sides, so the temperature control roller is heated as a whole, resulting in uniform temperature and no dead corners. The film on the temperature control roller is also heated evenly, resulting in better drying quality.

[0024] 4) In this invention, uniform vent holes are also provided on the outer roller body. The hot air generated by the heating rod in the installation gap can be discharged through the vent holes when the temperature control roller rotates, thereby heating the film. The structure of the vent holes can increase the heating effect on the temperature control roller. During the process of venting, the outer roller body is uniformly heated. On the other hand, the gas outflow can also prevent the accumulation of hot air, and the discharged gas can heat the film, achieving two goals at once.

[0025] 5) In this invention, since the outer roller body has a uniform ring of exhaust holes, hot air may be wasted. However, this invention also includes a ring of guide tubes on the outer side of the outer roller body. These guide tubes are installed at the upper or lower end of the temperature control box, and each guide tube has a guide notch. The position of the guide notch corresponds to the position on the film. Figure 1 and Figure 3 As shown, if the film is located on the lower end face of the temperature control roller, then the guide cylinder is set above the temperature control roller, and the guide notch is opened below. With this setting, the hot air discharged from the exhaust hole will still be guided to the position of the film under the action of the guide cylinder to heat the film. This not only reduces heat damage, but also makes the film drying and heating effect better.

[0026] 6) In this invention, a monitoring gap is left between the mounting base and the two side walls of the temperature control roller. A temperature sensor is installed in the monitoring gap. In addition, this invention also provides a power module and a temperature control module. The temperature control module is connected to the temperature sensor and the heating rod. The heating power of the heating rod can be adjusted through the data feedback of the temperature sensor. This invention is a direct adjustment, which is more timely and accurate. Moreover, the temperature sensor is set in the monitoring gap, so the temperature data is more accurate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a structural diagram of the temperature control roller in this invention;

[0029] Figure 3 yes Figure 2 Sectional view of AA. Detailed Implementation

[0030] The present invention will be further illustrated below with reference to specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, a polyimide film temperature control device includes a temperature control box 1, which contains several temperature control rollers 2. Each temperature control roller 2 includes an inner roller body 21 and an outer roller body 22. A raised mounting block 23 is provided at the middle position of the inner roller body 21. The outer roller body 22 is a cylindrical structure and is composed of two semi-cylindrical bodies, one above the other. The two semi-cylindrical bodies are fitted onto the outside of the outer roller body 22 and fixed to the mounting block 23 by fasteners 3, so that the outer roller body 22 can be detachably fitted onto the outside of the inner roller body 21. A circumferential mounting gap 4 is left between the outer roller body 22 and the inner roller body 21, and the mounting gap 4 is located on both sides of the mounting block 23.

[0032] Each temperature control roller 2 is provided with a mounting base 5 on both sides. The mounting base 5 is supported and fixed by a support rod 6. A drive device 7 is provided in the mounting base 5 on both sides. The drive rod of the drive device 7 is connected to the inner roller body 21 in the middle, which can drive the inner roller body 21 and the outer roller body 22 to rotate together. A heating rod 8 is provided in the mounting base 5 on both sides. The heating rod 8 is arranged horizontally and its arrangement corresponds to the position of the mounting gap 4 between the inner roller body 21 and the outer roller body 22 in a circumferential direction. The heating rod 8 extends into the mounting gap 4 and is suspended in the air.

[0033] When the heating rod 8 is powered on, it can heat the outer roller body 22. The outer roller body 22 can be detached and installed. When the inner roller body 21 and the outer roller body 22 rotate under the drive of the drive device 7, the heating rod 8 inside will not affect the rotation of the overall temperature control roller 2. The film 13 to be dried is pressed on the outer roller body 22 outside the temperature control roller 2 and is conveyed through the outer roller body 22.

[0034] The outer roller body 22 is also provided with evenly spaced exhaust holes 9. The exhaust holes 9 extend inward and are connected to the installation gap 4. The hot air generated in the installation gap 4 can escape outward from the exhaust holes 9.

[0035] Each temperature control roller 2 is also provided with a diversion tube 10 on its outer side. The diversion tube 10 is fitted on the outer side of the temperature control roller 2, and a diversion gap 11 is left between the diversion tube 10 and the temperature control roller 2. The diversion tube 10 is also provided with a diversion notch 12. The position and size of the diversion notch 12 correspond to the position and size of the film 13 conveyed on the temperature control roller 2. The hot air in the installation gap 4 is discharged from the exhaust hole 9 into the outer diversion tube 10, and then introduced into the position of the film 13 on the temperature control roller 2 for heating under the action of the diversion tube 10.

[0036] The length of the diversion tube 10 is greater than that of the temperature control roller 2.

[0037] The direction of the diversion tube 10 is different depending on the position of the film 13 on each temperature control roller 2. The diversion tube 10 is installed on the bottom or top side of the temperature control box 1 through the tripod 15. The size of the diversion notch 12 on the diversion tube 10 is determined according to the actual installation position of the temperature control roller 2.

[0038] A monitoring gap is left between the mounting bases 5 on both sides and the two side walls of the temperature control roller 2. A temperature sensor 14 is installed in the monitoring gap to monitor the temperature data in real time.

[0039] It also includes a power module and a temperature control module. The temperature control module is connected to the temperature sensor 14 and can control the heating power of the heating rod 8 accordingly. The fixing part 3 is a screw. The middle position of the outer roller body 22 and the mounting block 23 are provided with corresponding screw holes. The outer roller body 22 is fixed to the mounting block 23 by screws, and the screws are evenly spaced.

[0040] The temperature control roller of this invention uses direct heating of the roller body, but its specific structure is different from that of traditional hot oil circulation heating. The temperature control roller of this invention is set with an inner and an outer roller body. The outer roller body is installed in correspondence with the inner roller body through a ring of mounting blocks raised on the inner roller body. This leaves an installation gap between the inner and outer roller bodies, in which the heating rod can be placed. The outer roller body is set as two semi-circular cylindrical structures. After this setting, the outer roller body can be directly disassembled. After disassembly, the position of the heating rod on the inner ring is exposed, which is convenient for maintenance and replacement of the heating rod.

[0041] In this invention, after an installation gap is formed between the inner and outer rollers, a driving mechanism is provided on the mounting seats on both sides. The driving mechanism is connected to the inner roller from both sides, and a heating rod is provided on the mounting seat. The heating rod extends laterally into the installation gap in a smooth manner. The installation gap is circumferentially set, and the heating rod is arranged in a circumferential manner. After this setting, the internal heating rod does not move and will not affect the rotation of the temperature control roller. Moreover, the heat generated by the heating rod can directly heat the temperature control roller. Compared with the traditional circulating oil seal structure, the structure is much simpler and very ingenious and reasonable.

[0042] In this device, the temperature control roller is directly heated by heating rods, so the entire film can be heated directly from the bottom, resulting in higher film curing quality. Moreover, the heating rods are set on both sides of the device, extending inward from both sides, so the temperature control roller is heated as a whole, resulting in uniform temperature and no dead corners. The film on the temperature control roller is also heated evenly, resulting in better drying quality.

[0043] In this invention, uniform vent holes are also provided on the outer roller body. The hot air generated by the heating rod in the installation gap can be discharged through the vent holes when the temperature control roller rotates, thereby heating the film. The structure of the vent holes can increase the heating effect on the temperature control roller, and the outer roller body is uniformly heated during the process of venting. On the other hand, the gas outflow can also prevent the accumulation of hot air, and the discharged gas can also heat the film, achieving two goals at once.

[0044] In this invention, because the outer roller body has a ring of uniformly spaced vent holes, hot air might be wasted. However, this invention also includes a ring of guide tubes on the outer side of the outer roller body. These guide tubes are installed at the upper or lower end of the temperature control box, and each guide tube has a guide notch. The position of the guide notch corresponds to the position on the film. Figure 1 and Figure 3 As shown, if the film is located on the lower end face of the temperature control roller, then the guide cylinder is set above the temperature control roller, and the guide notch is opened below. With this setting, the hot air discharged from the exhaust hole will still be guided to the position of the film under the action of the guide cylinder to heat the film. This not only reduces heat damage, but also makes the film drying and heating effect better.

[0045] In this invention, a monitoring gap is left between the mounting base and the two side walls of the temperature control roller. A temperature sensor is installed in the monitoring gap. In addition, this invention also includes a power module and a temperature control module. The temperature control module is connected to the temperature sensor and the heating rod. The heating power of the heating rod can be adjusted through the data feedback from the temperature sensor. This invention provides direct adjustment, which is more timely and accurate. Moreover, the temperature sensor is located in the monitoring gap, so the temperature data is more accurate.

[0046] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A polyimide film temperature control device, comprising a temperature control box (1), a plurality of temperature control rollers (2) are arranged in the temperature control box (1), the temperature control roller (2) comprises an inner roller body (21) and an outer roller body (22), a ring of protruding mounting blocks (23) is arranged at the middle position of the inner roller body (21), the outer roller body (22) is arranged in a cylindrical structure, and the outer roller body (22) is composed of two half cylinders arranged one above the other, the two half cylinders are sleeved outside the outer roller body (22), and are fixed on the mounting blocks (23) by fixing members (3), so that the outer roller body (22) is detachably sleeved outside the inner roller body (21), and an annular mounting gap (4) is left between the outer roller body (22) and the inner roller body (21), and the mounting gap (4) is located on both sides of the mounting blocks (23). Mounting seats (5) are further arranged on both sides of each temperature control roller (2), the mounting seats (5) are supported and fixed by supporting rods (6), driving devices (7) are arranged in the mounting seats (5) on both sides, driving rods of the driving devices (7) are connected with the middle inner roller body (21), so as to drive the inner roller body (21) and the outer roller body (22) to rotate together, heating rods (8) are arranged in the mounting seats (5) on both sides, the heating rods (8) are arranged transversely, and the arrangement positions correspond to the positions of the mounting gap (4) between the inner roller body (21) and the outer roller body (22), the heating rods (8) correspondingly extend into the mounting gap (4), and the heating rods (8) are arranged in suspension. The heating rods (8) can heat the outer roller body (22) on the outer side after being electrified, the outer roller body (22) is detachably mounted, the inner heating rods (8) will not affect the rotation of the whole temperature control roller (2) when the whole inner roller body (21) and the outer roller body (22) rotate under the driving of the driving device (7), the film (13) to be dried is pressed on the outer roller body (22) on the outer side of the temperature control roller (2), and is conveyed through the outer roller body (22). Uniformly spaced exhaust holes (9) are further arranged on the outer roller body (22), the exhaust holes (9) extend to the inside and communicate with the mounting gap (4), and the hot air generated in the mounting gap (4) can escape outward from the exhaust holes (9). A drainage cylinder (10) is further arranged on the outer side of each temperature control roller (2), the drainage cylinder (10) is sleeved outside the temperature control roller (2), a drainage gap (11) is left between the drainage cylinder (10) and the temperature control roller (2), and a drainage notch (12) is further arranged on the drainage cylinder (10), the arrangement position and size of the drainage notch (12) correspond to the position and size of the occupied area of the conveyed film (13) on the temperature control roller (2), the hot air in the mounting gap (4) is discharged from the exhaust holes (9) to the outside drainage cylinder (10), and is introduced to the position of the film (13) on the temperature control roller (2) for heating under the action of the drainage cylinder (10).

2. The polyimide film temperature control device according to claim 1, wherein The length of the drainage cylinder (10) is greater than that of the temperature control roller (2).

3. The polyimide film temperature control device of claim 1, wherein The direction of the drainage cylinder (10) is different according to the position of the film (13) on each temperature control roller (2), the drainage cylinder (10) is installed on the bottom side or the upper side of the temperature control box (1) through a tripod (15); the size of the drainage gap (12) on the drainage cylinder (10) is determined according to the actual installation position of the temperature control roller (2).

4. The polyimide film temperature control device of claim 1, wherein The monitoring gap is left between the two mounting seats (5) and the two side walls of the temperature control roller (2), the temperature sensor (14) is installed in the monitoring gap, and the temperature data can be monitored in real time.

5. The polyimide film temperature control device of claim 3, wherein The power supply module and the temperature control module are further included, the temperature control module is connected with the temperature sensor (14) correspondingly, and the heating power of the heating rod (8) can be controlled correspondingly.

6. The polyimide film temperature control device of claim 1, wherein The fixing member (3) is a screw, corresponding screw holes are arranged on the middle position of the outer roller body (22) and the mounting block (23), the outer roller body (22) is fixed on the mounting block (23) through the screw, and the screws are uniformly arranged at intervals.

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