A cooling device for an imination furnace chain

Abstract

The utility model discloses a kind of cooling devices for imidization furnace chain, it is related to polyimide film processing technical field, including gas supply equipment, further including cooling structure, cooling structure is located in chain one side, and the air outlet of cooling structure is obliquely upwards towards the chain clamp on chain, control valve is located between gas supply equipment and cooling structure;Cooling structure includes fixed block, fixed block is located in chain one side, gas supply cavity is located on fixed block, and is communicated with control valve, multiple cooling components are evenly located on fixed block, and are all communicated with gas supply cavity;This kind of cooling device for imidization furnace chain can be cooled to chain clamp quickly, when new polyamide acid plastic film is clamped in the next cycle by chain clamp, make chain clamp temperature control in suitable range, avoid scalding polyamide acid plastic film, to ensure the quality of polyimide film;Simultaneously, residual film scrap on chain clamp can also be blown off, prevent scrap stagnation and affect subsequent clamping effect.

Description

Technical Field

[0001] This utility model relates to the field of polyimide film processing technology, specifically a cooling device for an imidization furnace chain. Background Technology

[0002] Polyimide film is a high-performance organic polymer film, ranking at the top of the engineering materials pyramid. It is produced by polymerizing pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (ODA) in the polar solvent dimethylacetamide (DMAC), followed by defoaming, casting, and imidization. Polyimide films are widely used in aerospace, rail transportation, electronics, and other related industries.

[0003] In existing technologies for producing biaxially oriented polyimide films, pin-plate clamps and chain clamps are commonly used to fix the polyamic acid film for high-temperature imidization. Pin-plate clamps are suitable for producing relatively thin polyimide films below 62.5µm, as they do not suffer from significant heat accumulation at high temperatures. For producing polyimide films with a thickness greater than 62.5µm, chain clamps are typically used for fixation.

[0004] However, steel chain clamps are bulky and accumulate significant heat after high-temperature treatment in the imidization furnace. This results in slow convective heat transfer after exiting the furnace, leading to high clamp temperatures. When the high-temperature chain clamp enters the next cycle to hold a new polyamic acid film, the high temperature can easily burn the portion of the film it holds. This causes the polyamic acid film to become unstable during imidization, resulting in an insufficiently wide, unevenly thick, and poorly mechanical polyimide film.

[0005] Therefore, it is necessary to develop a component for cooling the chain clamps of the imidization furnace to solve the problem of heat storage in the chain clamps damaging the film, thereby producing high-performance biaxially oriented polyimide films. Utility Model Content

[0006] The purpose of this invention is to provide a cooling device for an imidization furnace chain. This cooling device can rapidly cool the chain clamps, keeping the chain clamp temperature within a suitable range when the chain clamps enter the next cycle to hold a new polyamic acid film, thus preventing the polyamic acid film from being damaged by heat and ensuring the quality of the polyimide film.

[0007] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a cooling device for an imidization furnace chain, including a gas supply device and a cooling structure, wherein the cooling structure is disposed on one side of the chain and the air outlet of the cooling structure is obliquely upward toward the chain clamp on the chain. A control valve is provided between the air supply equipment and the cooling structure; The cooling structure includes a fixing block, which is disposed on one side of the chain; An air supply chamber is located on the fixed block and is connected to the control valve. Multiple cooling components are evenly distributed on the fixed block and are all connected to the air supply chamber. Multiple fixing screw holes are equally spaced on the fixing block near the chain and communicate with the air supply chamber. The cooling component is coaxially and detachably mounted on the fixing screw holes. The cooling assembly includes a threaded cylinder, which is coaxially disposed in the fixed screw hole and screwed into the fixed screw hole. An air supply column is coaxially mounted on the threaded cylinder; An air delivery groove is coaxially disposed inside the air delivery column, and one end of the air delivery groove passes through the threaded cylinder. Multiple air inlets are arranged in a ring on the side of the air delivery column away from the threaded cylinder and are all connected to the other end of the air delivery groove. All the air inlets face the chain clamp.

[0008] Preferably, the cooling assembly further includes a limiting ring, which is coaxially disposed on the air delivery column, and the diameter of the limiting ring is larger than the inner diameter of the fixing screw hole.

[0009] Preferably, the limiting ring is a hexagonal boss.

[0010] Preferably, the cooling structure further includes multiple sealing ring grooves, the fixing screw holes are coaxially provided in the sealing ring grooves, and sealing rings are provided in the sealing ring grooves.

[0011] Preferably, the cross-section of the fixing block is triangular, and its inclined surface faces the chain clamp.

[0012] Preferably, the air supply equipment is a high-pressure centrifugal fan or an air compressor.

[0013] In summary, this utility model has the following beneficial effects: This invention utilizes multiple cooling components on a fixed block to cool the chain clamp, keeping its temperature within a suitable range and preventing the polyamic acid film from burning, thus ensuring the quality of the polyimide film. Simultaneously, the use of multiple annularly distributed air nozzles ensures that airflow is evenly distributed across all parts of the chain clamp, preventing localized overheating and improving the consistency of cooling. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure of this utility model; Figure 2This is a schematic diagram of the cooling component of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional schematic diagram of the cooling structure of this utility model; Figure 5 This utility model Figure 4 Enlarged view of point B in the middle.

[0015] In the diagram: 1. Air supply equipment; 2. Cooling structure; 21. Fixing block; 22. Air supply chamber; 23. Fixing screw hole; 24. Threaded cylinder; 25. Air delivery column; 26. Air delivery groove; 27. Air blowing port; 28. Limiting ring; 29. ​​Sealing ring groove; 3. Control valve; 4. Chain clamp. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] refer to Figure 1-5 A cooling device for an imidization furnace chain includes an air supply device 1, a cooling structure 2, and a control valve 3. The cooling structure 2 is located on one side of the chain, and the air outlet of the cooling structure 2 is angled upward toward the chain clamp 4 on the chain, which allows the high-pressure airflow to directly impact the high-temperature clamping part of the chain clamp 4, achieving efficient forced convection cooling. The control valve 3 is located on the connecting pipe between the air supply device 1 and the cooling structure 2. The control valve 3 can be a manual valve or a solenoid valve, which can adjust the flow rate of high-pressure air entering the cooling structure 2, thereby controlling the cooling speed of the chain clamp 4 and adapting to the production needs of polyimide films of different thicknesses. The cooling structure 2 includes a fixing block 21, an air supply chamber 22, and multiple cooling components. The fixing block 21 is located on the outside of the chain and serves as the main support component of the cooling structure 2, providing a stable mounting base for the air supply chamber 22 and the cooling components. The length of the fixing block 21 can be 0.8~1.5m, and it can be fixed to the fixing frame on the side of the chain with bolts. The air supply chamber 22 is located inside the fixing block 21, extends along the length of the fixing block 21, and is connected to the control valve 3 through a pipe. There can be multiple connection points between the air supply chamber 22 and the control valve 3, which can evenly distribute the high-pressure air from the air supply device 1 to each cooling component, avoiding the problem of uneven cooling effect of different cooling components on the chain clamp 4. Multiple cooling components are evenly located on the side of the fixing block 21 near the chain and are all connected to the air supply chamber 22. They can convert the high-pressure air in the air supply chamber 22 into multiple high-speed airflows, which are blown onto the different chain clamps 4 that are running continuously, achieving uninterrupted cooling of the chain clamps 4.

[0018] Preferably, the cooling structure 2 further includes multiple fixing screw holes 23. The diameter of the fixing screw holes 23 can be 10~14mm, and the center distance between two adjacent fixing screw holes 23 is 80~100mm. The multiple fixing screw holes 23 are equally spaced on the side of the fixing block 21 near the chain and are connected to the air supply chamber 22. Cooling components are coaxially and detachably mounted on the fixing screw holes 23. This facilitates the individual replacement and maintenance of the cooling components. When a cooling component is blocked or damaged, it is not necessary to disassemble the entire cooling structure 2. Only the corresponding cooling component needs to be unscrewed for replacement, thereby shortening the downtime of equipment maintenance and reducing losses caused by production interruption.

[0019] Preferably, the cooling structure 2 further includes multiple sealing ring grooves 29. The sealing ring grooves 29 are formed on the surface of the fixing block 21 and are coaxially disposed at the opening of the fixing screw hole 23. A sealing ring is provided in the sealing ring groove 29. The sealing ring can be an O-ring fluororubber sealing ring. The sealing ring can seal the fitting gap between the cooling component and the fixing screw hole 23, prevent high-pressure air leakage, improve energy utilization, and at the same time block external dust, film debris and other impurities from entering the air supply chamber 22, avoid the air blowing port 27 of the cooling component from being blocked, and extend the service life of the device.

[0020] Preferably, the cooling assembly includes a threaded cylinder 24, an air supply column 25, an air supply groove 26, and multiple air outlets 27. The threaded cylinder 24 is coaxially disposed within a fixing screw hole 23 and is screwed into the fixing screw hole 23, enabling quick and detachable connection between the cooling assembly and the fixing block 21. The length of the threaded cylinder 24 can be 5~10mm. The air supply column 25 is coaxially disposed at the outer end of the threaded cylinder 24 to guide the airflow and form a stable air outlet channel. The air supply groove 26 is coaxially disposed within the air supply column 25, and one end of the air supply groove 26 penetrates through the threaded cylinder 24 and communicates with the inner hole of the threaded cylinder 24, enabling the supply of air... High-pressure air from cavity 22 is smoothly introduced into the air supply column 25. The side of the air supply column 25 away from the threaded cylinder 24 can be a hemispherical surface, with multiple air nozzles 27 evenly arranged in a ring on the hemispherical surface, all connected to the other end of the air supply groove 26. The diameter of the air nozzles 27 can be 1~2mm, and all the air nozzles 27 face the clamping part of the chain clamp 4. The use of multiple air nozzles 27 in a ring distribution can ensure that the airflow evenly covers all the heated surfaces of the chain clamp 4, avoiding the problem of scalding film caused by insufficient local cooling. At the same time, it can increase the airflow velocity, enhance the convective heat transfer coefficient, and improve the overall cooling efficiency. The included angle of the arc surface of the multiple air nozzles 27 on the air supply column 25 is less than 160°; this ensures that the airflow blown out by the air nozzles 27 acts on the chain clamp 4, thereby improving the utilization rate of the air source.

[0021] Preferably, the cooling assembly further includes a limiting ring 28, which is coaxially disposed at the connection between the air supply column 25 and the threaded cylinder 24, and the diameter of the limiting ring 28 is larger than the inner diameter of the fixing screw hole 23. The limiting ring 28 can precisely limit the depth of the cooling assembly screwed into the fixing screw hole 23, ensuring that the distance between the air outlet 27 of all cooling assemblies and the surface of the chain clamp 4 remains consistent, thereby ensuring that the cooling effect of all chain clamps 4 on the entire chain is uniform and consistent, and avoiding film quality fluctuations caused by uneven cooling.

[0022] Preferably, the limiting ring 28 can be a hexagonal boss, which facilitates the tightening and disassembly of the cooling components using a standard wrench without the need for special tools, further improving the convenience and efficiency of equipment maintenance.

[0023] Preferably, the cooling structure 2 further includes a plurality of sealing ring grooves 29, wherein a fixing screw hole 23 is coaxially provided in the sealing ring groove 29, and a sealing ring is provided in the sealing ring groove 29.

[0024] Preferably, the fixed block 21 has a triangular cross-section, with its inclined surface facing the chain clamp 4. The fixed block 21 can be welded from stainless steel plates, and the cooling component can be located at the bottom of the inclined surface. The triangular structure allows the cooling component installed on the inclined surface to be aligned with the clamping part of the chain clamp 4 at the optimal angle, thereby improving the effective utilization rate of airflow. At the same time, the triangular cross-section has high structural strength and rigidity, and can withstand the reaction force of high-pressure airflow, ensuring the stability and reliability of the device during long-term continuous operation.

[0025] Preferably, the air supply equipment 1 is a high-pressure centrifugal fan or an air compressor; the high-pressure centrifugal fan has the characteristics of large air volume, stable operation and low energy consumption, and is suitable for the needs of large-scale continuous production; the air compressor has the characteristics of high pressure and large adjustable air volume range, and is suitable for thick film production occasions with high requirements for cooling effect. Users can flexibly select the appropriate air supply equipment according to the actual production conditions and product specifications.

[0026] The specific working principle is as follows: When the imidization furnace starts running, the air supply equipment 1 is activated. High-pressure air generated by the high-pressure centrifugal fan enters the air supply chamber 22 of the cooling structure 2 through pipes and control valve 3. The air supply chamber 22 evenly distributes the high-pressure air into the air delivery slots 26 of each cooling component, and then blows it onto the chain clamps 4 on the chain through six air blowing ports 27 arranged in a ring on the end face of the air delivery column 25.

[0027] High-pressure air undergoes forced convection heat exchange with the high-temperature chain clamp 4, carrying away its heat and lowering its temperature. The air supply flow rate can be adjusted by regulating the opening of control valve 3, thereby regulating the cooling intensity. When control valve 3 is opened to 3 / 4, the temperature of chain clamp 4 can be reduced from 160~180℃ to 110~130℃. This temperature range effectively prevents damage to the polyamic acid film while avoiding excessive cooling and energy waste. Simultaneously, the high-pressure air also blows away any residual film residue on chain clamp 4, preventing residue from affecting subsequent clamping performance.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cooling device for an imidization furnace chain, comprising a gas supply device (1), characterized in that: It also includes a cooling structure (2), which is located on one side of the chain, and the air outlet of the cooling structure (2) is angled upward toward the chain clip (4) on the chain. Control valve (3), the control valve (3) is located between the gas supply device (1) and the cooling structure (2); The cooling structure (2) includes a fixing block (21), which is located on one side of the chain; Air supply chamber (22), the air supply chamber (22) is located on the fixed block (21) and is connected to the control valve (3); Multiple cooling components are evenly disposed on the fixed block (21) and are all connected to the air supply chamber (22); Multiple fixing screw holes (23) are equally spaced on the fixing block (21) near the chain and communicate with the air supply chamber (22). The cooling component is coaxially and detachably provided on the fixing screw holes (23). The cooling assembly includes a threaded cylinder (24), which is coaxially disposed in the fixed screw hole (23) and screwed into the fixed screw hole (23); An air supply column (25) is coaxially mounted on the threaded cylinder (24); An air delivery groove (26) is coaxially disposed inside the air delivery column (25), and one end of the air delivery groove (26) passes through the threaded cylinder (24). Multiple air inlets (27) are arranged in a ring on the side of the air delivery column (25) away from the threaded cylinder (24) and are all connected to the other end of the air delivery groove (26). All multiple air inlets (27) face the chain clamp (4).

2. A cooling device for an imidization furnace chain according to claim 1, characterized in that: The cooling assembly also includes a limiting ring (28), which is coaxially disposed on the air supply column (25), and the diameter of the limiting ring (28) is larger than the inner diameter of the fixing screw hole (23).

3. A cooling device for an imidization furnace chain according to claim 2, characterized in that: The limiting ring (28) is a hexagonal boss.

4. A cooling device for an imidization furnace chain according to claim 1, characterized in that: The cooling structure (2) also includes multiple sealing ring grooves (29), the fixing screw hole (23) is coaxially provided in the sealing ring groove (29), and a sealing ring is provided in the sealing ring groove (29).

5. A cooling device for an imidization furnace chain according to claim 1, characterized in that: The cross-section of the fixing block (21) is triangular, and its inclined surface faces the chain clamp (4).

6. A cooling device for an imidization furnace chain according to claim 1, characterized in that: The gas supply equipment (1) is a high-pressure centrifugal fan or an air compressor.

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