Annealing furnace rear traction mechanism for polyimide film production
By setting a traction mechanism with traction rollers and guide rollers after the annealing furnace, and using a torque motor and reducer in conjunction with a backstop component, the problems of slack and entanglement during film cutting are solved, automatic traction is achieved, production efficiency is improved and waste is reduced.
Patent Information
- Application Number
- CN202423317352.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the production of polyimide film, changing the roll when cutting the film can cause problems such as film loosening and tangling, increasing workload and causing film waste.
Design a traction mechanism for the back of an annealing furnace, including a traction roller and a guide roller. Power is provided by a torque motor and a reducer. Combined with a backstop component and an elastic mechanism, the film traction force is automatically adjusted to prevent the film from being pulled back into the annealing furnace.
It enables automatic traction of the film during cutting, avoiding film slack and tangling, reducing manual intervention, improving production efficiency and reducing film waste.
Smart Images
Figure CN223560932U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of polyimide film production, in particular to a post-annealing furnace traction mechanism for polyimide film production. BACKGROUND
[0002] At present, the general process of preparing polyimide film by using a thermal imine method is as follows: after defoaming, the polyamide acid solution is pressed into the die head storage tank of the front box body from the stainless steel solution storage tank through the pipeline, the steel belt is installed on the large drum of the front and rear box bodies and is operated in a certain direction, the solution in the storage tank is uniformly covered on the surface of the steel belt under the action of the die head scraper, a liquid film with uniform thickness is formed, and then the liquid film is dried in the drying channel; after one rotation, the liquid film becomes a solid film and is separated from the large drum of the front box body as the solvent evaporates; the separated film enters the stretching machine for transverse stretching and imidization stage through the guide roller. After high-temperature imidization, the film needs to be cut by the cutting mechanism to cut off the waste edges with pinholes on both sides of the film, and then the cut film needs to undergo a series of process procedures such as thickness detection, dust sticking treatment, annealing treatment and flaw detection, and finally the winding machine is used to complete the winding work.
[0003] Among them, the commonly used process for the winding machine station is double-station winding. When one station is full, manual intervention is needed to cut the film to replace the roll. At the moment of cutting the film, the film relaxation and winding problems of the front-end process occur, the film winding problem of the rubber roller occurs, the film needs to be pulled out of the annealing furnace, which not only increases the work of film threading, but also causes waste of the film. SUMMARY
[0004] To solve the above problems, the technical scheme adopted by the application is a post-annealing furnace traction mechanism for polyimide film production, which comprises a traction roller and a guide roller arranged at the outlet position of the annealing furnace, the traction roller and the guide roller are movably fixed on the same mounting plate, the traction roller and the guide roller are installed in parallel, the guide roller is provided with a non-return member, the mounting plate is fixed with an adjusting plate, the adjusting plate is fixed with a speed reducer fixing plate through a supporting column, a speed reducer is fixed through the speed reducer fixing plate, the power of the traction roller is provided by the cooperation of a torque motor and the speed reducer, and the traction roller is connected with the speed reducer through an electromagnetic clutch.
[0005] Optionally, the non-return member comprises inner shaft sections at both ends of the guide roller, a middle shaft fixed to the mounting plate and an outer shaft fixed to the mounting plate, the middle shaft is provided with a non-return tongue, an elastic mechanism is arranged between the outer wall of the non-return tongue and the inner wall of the outer shaft, the inner shaft sections are provided with non-return grooves, and the non-return tongue is matched with the non-return grooves in the relaxed state of the elastic mechanism.
[0006] Optionally, the reverse-preventing groove is provided with a blocking wall, and the reverse-preventing tongue is provided with a reverse-preventing surface, the reverse-preventing surface is matched with the blocking wall in the relaxed state of the elastic mechanism, and the reverse-preventing surface and the blocking wall are both provided with electrodes matched with each other to constitute an automatic switch of the traction motor.
[0007] Optionally, the middle shaft and the outer shaft are designed in a split type, the middle shaft with multiple petals is connected through the fixing groove and the fixing tongue, and the outer shaft with multiple petals is connected through the fixing groove and the fixing tongue.
[0008] Optionally, the reverse-preventing tongue is provided with at least two groups.
[0009] Optionally, the annealing furnace entrance position is provided with a traction frame assembly, and the traction frame assembly is provided with a cylinder floating roller mechanism.
[0010] Optionally, the angle between the blocking wall and the radial direction of the inner shaft segment is 0-15°.
[0011] Optionally, the elastic mechanism is a spring, and the material of the spring is high fatigue grade quenched and tempered spring steel wire.
[0012] Optionally, the angle between the plane formed by the axis of the guide roller and the axis of the traction roller and the horizontal plane is 75°-90°.
[0013] The annealing furnace rear traction mechanism for polyimide film production provided in the application has the following beneficial effects:
[0014] The annealing furnace rear traction mechanism for polyimide film production provided in the application can work in two ways. One is that the torque motor and the speed reducer are turned on during the production process to continuously pull the polyimide film out of the annealing furnace. When the film is cut and the roll is replaced, the polyimide film is still pulled to prevent the film from being pulled back into the annealing furnace due to the sudden disappearance of the pulling force of the roll. The second is that the polyimide film is passively pulled by the traction roller and the guide roller during the production process. When the film is cut and the roll is replaced, the reverse-preventing mechanism of the guide roller is automatically triggered to prevent the polyimide film from being pulled back. At this time, the torque motor and the speed reducer are turned on to pull the polyimide film. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description.
[0016] Figure 1 The front view schematic diagram of the annealing furnace rear traction mechanism for polyimide film production provided in the embodiments of the application is shown in the figure.
[0017] Figure 2 The front view schematic diagram of the annealing furnace rear traction mechanism for polyimide film production provided in the embodiments of the application is shown in the figure.
[0018] Figure 3 for Figure 2 BB cross-sectional view;
[0019] Figure 4 This is a schematic diagram of the traction mechanism behind the annealing furnace for polyimide film production provided in an embodiment of this application.
[0020] Figure 5 This is a three-dimensional schematic diagram of the left side of the anti-reverse component provided in the embodiment of this application (left-side three-dimensional view);
[0021] Figure 6 This is a three-dimensional view (right-side perspective) of the disassembled anti-reverse component provided in the embodiments of this application;
[0022] Figure 7 This is a three-dimensional schematic diagram of a split-type central axis provided in an embodiment of this application.
[0023] Explanation of reference numerals in the attached drawings: 1-Traction frame assembly; 2-Annealing furnace; 3-Winder; 4-Rear traction mechanism of annealing furnace; 5-Auxiliary traction mechanism; 6-Cylinder floating roller mechanism; 7-Dust-adhesion mechanism; 8-Traction roller; 9-Guide roller; 10-Mounting plate; 11-Adjusting plate; 12-Support column; 13-Reducer fixing plate; 14-Reducer; 15-Torque motor; 16-Electromagnetic clutch; 17-Inner shaft section; 18-Central shaft; 19-Outer shaft; 20-Reverse check tongue; 21-Reverse check groove; 22-Spring; 23-Reverse check surface; 24-Blocking wall; 25-Fixing groove; 26-Fixing tongue; 27-Receiving groove. Detailed Implementation
[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0025] like Figures 1-4 As shown, a traction mechanism 4 for an annealing furnace used in polyimide film production includes a traction roller 8 and a guide roller 9 located at the outlet of the annealing furnace 2. The traction roller 8 and the guide roller 9 are movably fixed on the same mounting plate 10 and are installed in parallel. The guide roller 9 is provided with a backstop component. An adjustment plate 11 is fixed on the mounting plate 10. A reducer fixing plate 13 is fixed on the adjustment plate 11 via a support column 12. A reducer 14 is fixed on the reducer fixing plate 13. The power of the traction roller 8 is provided by a torque motor 15 and a reducer 14 working together. The traction roller 8 is connected to the reducer 14 via an electromagnetic clutch 16.
[0026] Figure 1The middle arrow direction is the forward direction of the polyimide film production, the position before the annealing furnace 2 is the position before the annealing furnace 2, and the position after the annealing furnace 2 is the position after the annealing furnace 2. During the production of the polyimide film, the traction of the winding machine 3 and the traction frame assembly 1 before the annealing furnace 2 form a tension balance for the polyimide film, so that the polyimide film can be produced and wound at a constant speed. When cutting the film and replacing the roll, the traction of the winding machine 3 suddenly disappears, which on the one hand causes the tension balance to be unbalanced, causing the polyimide film to be pulled back to the annealing furnace 2 by the tension, and on the other hand, the friction of the traction frame assembly 1 itself will also pull the polyimide film to the position before the annealing furnace 2, causing the film to be wound on the rubber roller and the polyimide film to be pulled back.
[0027] In actual use, the annealing furnace rear traction mechanism 4 for polyimide film production provided by the application can provide two working modes:
[0028] One is to start the torque motor 15 and the speed reducer 14 during production to continuously pull the polyimide film out of the annealing furnace 2. When cutting the film and replacing the roll, the polyimide film is still pulled, preventing the film from being pulled back into the annealing furnace 2 due to the sudden disappearance of the roll traction. The advantage of this is that the polyimide film can be automatically pulled without manual intervention.
[0029] The second is to passively pull the polyimide film by the traction roller 8 and the guide roller 9 during production. When cutting the film and replacing the roll, the non-return mechanism of the guide roller 9 is automatically triggered to prevent the polyimide film from being pulled back. At this time, the torque motor 15 and the speed reducer 14 are started to pull the polyimide film. The advantage of this is that during normal production, the traction speed of the traction roller 8 does not need to match the front and rear stations (winding machine 3, annealing furnace 2 and traction frame assembly 1), reducing the complexity of the process. Due to equipment errors, the more active traction rollers there are, the more difficult it is to adjust and match the speed error between devices, affecting the adjustment of the polyimide film tension.
[0030] As Figures 4-6As shown, in another embodiment of this application, the anti-reverse component includes inner shaft sections 17 at both ends of the guide roller 9, a central shaft 18 fixed to the mounting plate 10, and an outer shaft 19 fixed to the mounting plate 10. The central shaft 18 is provided with an anti-reverse tongue 20, and an elastic mechanism is provided between the outer wall of the anti-reverse tongue 20 and the inner wall of the outer shaft 19. In this embodiment, a receiving groove 27 is provided on the inner side of the outer shaft. The receiving groove 27 is used to accommodate the compressed elastic mechanism when the anti-reverse tongue is fully retracted to the central shaft 18. The inner shaft section 17 is provided with an anti-reverse groove 21. The anti-reverse tongue 20 cooperates with the anti-reverse groove 21 when the elastic mechanism is extended. The outer shaft 19 and the central shaft 18 are fixed, and the inner shaft section 17 rotates. When the anti-reverse groove 21 rotates to the position of the anti-reverse tongue 20, the anti-reverse tongue 20 has sufficient space, the elastic mechanism extends, and the anti-reverse tongue 20 enters the anti-reverse groove 21. As the inner shaft section 17 continues to rotate, the anti-reverse tongue 20 retracts.
[0031] When the inner shaft section 17 reverses, the anti-reverse tongue 20 enters the anti-reverse groove 21 and gets stuck, preventing the inner shaft section 17 from continuing to rotate, thus achieving anti-reverse rotation.
[0032] like Figures 4-6 As shown, in another embodiment of this application, the anti-reverse groove 21 is provided with a blocking wall 24, and the anti-reverse tongue 20 is provided with an anti-reverse surface 23. When the elastic mechanism is extended, the anti-reverse surface 23 cooperates with the blocking wall 24. Both the anti-reverse surface 23 and the blocking wall 24 are provided with mutually cooperating electrodes to form an automatic switch for the traction motor. As a feasible working mode, when the mutually cooperating electrodes provided on the anti-reverse surface 23 and the blocking wall 24 are in contact for more than 0.5 seconds, an electrical signal is provided to start the torque motor 15 and the reducer 14, and to begin traction of the polyimide film. This realizes that the torque motor 15 and the reducer 14 are turned off during the production process and automatically turned on when changing the roll, reducing the amount of manual labor. The specific electrical signal provision system is determined by the actual situation. Under different stretching speeds, the instantaneous reverse traction speed of the polyimide film after cutting is different.
[0033] like Figure 6 and Figure 7 As shown, in another embodiment of this application, the central shaft 18 and the outer shaft 19 are designed as separate units. The multi-lobed central shaft 18 is connected to each other by a fixing groove 25 and a fixing tongue 26, and the multi-lobed outer shaft 19 is connected to each other by a fixing groove 25 and a fixing tongue 26. The figure shows the separate design of the central shaft 18, while the outer shaft 19 can adopt a consistent design. The separate design of the central shaft 18 and the outer shaft 19 facilitates the disassembly and replacement of structures such as elastic mechanisms and automatic switches for traction motors.
[0034] like Figure 1 , Figure 4 and Figure 7As shown, in another embodiment of this application, at least two sets of anti-reverse tongues 20 are provided. Having multiple sets of anti-reverse tongues 20 can more quickly prevent the guide roller 9 from reversing when the traction force of the winding machine 3 disappears. The longest reversal distance prevented by a single anti-reverse tongue 20 is one full rotation of the guide roller 9. Multiple sets of anti-reverse tongues 20 can shorten this reversal distance. When two sets of anti-reverse tongues 20 are symmetrically provided, the longest reversal distance is half a full rotation of the guide roller 9. Providing more anti-reverse tongues 20 can further shorten this reversal distance. However, the more anti-reverse tongues 20 are provided, the lower the structural strength of the central shaft 18. Therefore, in actual use, the number of anti-reverse tongues 20 and the central shaft 18 should be determined according to the dimensions of the anti-reverse tongues 20 and the actual usage requirements.
[0035] like Figures 1-4 As shown in another embodiment of this application, a traction frame assembly 1 is provided at the inlet of the annealing furnace 2, and the traction frame assembly 1 is provided with a cylinder floating roller mechanism 6. The traction frame assembly is also provided with an auxiliary traction mechanism 5 and a dust-adhesive mechanism 7. The auxiliary traction mechanism 5 is used to stretch the polyimide film that has passed through the stretching machine and trimming to the front of the annealing furnace, and the dust-adhesive mechanism 7 is used to remove dust, impurities and other particulate matter carried on the upper and lower surfaces of the polyimide film, thereby purifying the surface of the polyimide film. When the production mode of continuously turning on the torque motor 15 and the reducer 14 to pull the polyimide film is in the production process of polyimide film, the cylinder floating roller mechanism 6 can effectively adjust the film tension; when the production mode of turning on the torque motor 15 and the reducer 14 only when the polyimide film is pulled in the opposite direction is in the production mode, the cylinder floating roller mechanism 6 can flexibly adjust the polyimide film tension during the process of cutting the film until the torque motor 15 and the reducer 14 are turned on, providing operating margin and reserving time for motor start-up.
[0036] like Figure 5 and Figure 6 As shown, in another embodiment of this application, the angle between the blocking wall 24 and the radial direction of the inner shaft segment 17 is 0-15°. The radial direction of the inner shaft segment 17 refers to the direction from the outer wall of the inner shaft segment 17 to the axis of the inner shaft segment 17. The blocking wall 24 forms an angle of 0-15° with this direction, which can effectively play a role in preventing backflow. As a necessary setting for the cooperation between the blocking wall 24 and the backflow prevention surface 23 of the backflow prevention tongue 20, the backflow prevention surface 23 and the radial direction of the inner shaft segment 17 are also set at the same angle as the blocking wall 24.
[0037] like Figure 6 and Figure 7 As shown, in another embodiment of this application, the elastic mechanism is a spring 22, and the material of the spring 22 is high fatigue grade quenched-tempered spring steel wire. The material of the spring 22 needs to meet the requirements of GB / T18983-2017 "Quenched-Tempered Spring Steel Wire" for high fatigue grade steel wire, so as to meet the working environment of long-term compression-extension cycle.
[0038] likeFigure 4 As shown in another embodiment of the present application, the angle between the plane formed by the axis of the guide roller 9 and the axis of the traction roller 8 and the horizontal plane is 75°-90°. In order to ensure that there is enough polyimide film wrap angle and effective friction with the traction roller 8 and the guide roller 9, the angle between the plane formed by the axis of the guide roller 9 and the axis of the traction roller 8 and the horizontal plane is required to be 75°-90°.
[0039] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.
Claims
1. A traction mechanism after an annealing furnace for polyimide film production, characterized in that: The device includes a traction roller and a guide roller located at the outlet of the annealing furnace. The traction roller and the guide roller are movably fixed on the same mounting plate and are installed in parallel. The guide roller is equipped with a backstop component. An adjustment plate is fixed to the mounting plate. A reducer fixing plate is fixed to the adjustment plate via a support column. The reducer is fixed to the reducer via the reducer fixing plate. The power of the traction roller is provided by a torque motor and the reducer. The traction roller is connected to the reducer via an electromagnetic clutch.
2. The traction mechanism after the annealing furnace for polyimide film production as described in claim 1, characterized in that: The anti-reverse component includes inner shaft sections at both ends of the guide roller, a central shaft fixed to the mounting plate, and an outer shaft fixed to the mounting plate. The central shaft is provided with an anti-reverse tongue, and an elastic mechanism is provided between the outer wall of the anti-reverse tongue and the inner wall of the outer shaft. The inner shaft section is provided with an anti-reverse groove, and the anti-reverse tongue cooperates with the anti-reverse groove when the elastic mechanism is extended.
3. The traction mechanism after the annealing furnace for polyimide film production as described in claim 2, characterized in that: The anti-reverse groove is provided with a blocking wall, and the anti-reverse tongue is provided with an anti-reverse surface. When the elastic mechanism is extended, the anti-reverse surface cooperates with the blocking wall. Both the anti-reverse surface and the blocking wall are provided with mutually cooperating electrodes to form an automatic switch for the traction motor.
4. The traction mechanism after the annealing furnace for polyimide film production as described in claim 2, characterized in that: The central shaft and outer shaft are designed as separate units. The central shaft with multiple lobes is connected by a fixing groove and a fixing tongue, and the outer shaft with multiple lobes is connected by a fixing groove and a fixing tongue.
5. The traction mechanism after the annealing furnace for polyimide film production as described in claim 4, characterized in that: The anti-reverse tongue is provided in at least two sets.
6. The traction mechanism after the annealing furnace for polyimide film production as described in claim 3, characterized in that: A traction frame assembly is provided at the inlet of the annealing furnace, and the traction frame assembly is provided with a cylinder floating roller mechanism.
7. The traction mechanism after the annealing furnace for polyimide film production as described in claim 6, characterized in that: The angle between the barrier wall and the radial direction of the inner shaft segment is 0-15°.
8. The traction mechanism after the annealing furnace for polyimide film production as described in claim 2, characterized in that: The elastic mechanism is a spring, and the spring is made of high fatigue grade quenched and tempered spring steel wire.
9. The traction mechanism after the annealing furnace for polyimide film production as described in claim 7, characterized in that: The angle between the plane connecting the axis of the guide roller and the axis of the traction roller and the horizontal plane is 75°-90°.