Polyimide fiber large tow dry spinning channel head device
By using an annular spinning area of 2000-5000 spinneret holes and cooling water jacket in the polyimide fiber large tow dry spinning device, the problem of low output and high energy consumption in the prior art is solved, and efficient production of large tow spinning is achieved.
Patent Information
- Application Number
- CN202421844788.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In the existing polyimide fiber dry spinning technology, a single channel can only spin up at most 500 fibers, with low yield and high energy consumption.
A polyimide fiber large tow dry spinning device is designed, using an annular spinning area of 2000-5000 spinning holes, and a cooling water jacket and an annular hot air duct are installed on the outer wall of the stock liquid storage tank, so that the fiber curing is achieved through cooling of the cooling water jacket and hot air evaporation solvent.
Large tow spinning has been achieved, which has increased production capacity and reduced energy consumption.
Smart Images
Figure CN223061145U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spinning equipment, in particular to a dry spinning nozzle device for large tow polyimide fibers. Background Art
[0002] The spinning nozzle is an important device in the polyimide spinning device and also an important link to ensure the spinning quality. The polyimide stock solution is extruded from the spinneret orifice and enters the spinning nozzle. The existing dry spinning technology for polyimide fibers uses a small spinneret combination for spinning. At most 500 fibers can be spun at each nozzle position, resulting in low output and high energy consumption. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a dry spinning nozzle device for large tow polyimide fibers in view of the above deficiencies of the prior art.
[0004] A dry spinning nozzle device for large tow polyimide fibers of the utility model includes a nozzle and a spinning head. The spinning head is installed above the nozzle. The spinning head includes a stock solution storage tank. The bottom end of the stock solution storage tank is provided with an annular spinning area. 2000 - 5000 spinning holes are evenly arranged in the annular spinning area. The outer wall of the stock solution storage tank is provided with a cooling component for cooling the stock solution. An annular hot air duct is also provided above the nozzle. The stock solution storage tank is located inside the ring of the annular hot air duct. One side of the annular hot air duct close to the nozzle is open, and a filter screen is provided at the open end.
[0005] Further, the cooling component includes a cooling water jacket sleeved on the outer wall of the stock solution storage tank.
[0006] Further, the water inlet and outlet of the cooling water jacket are connected to a water cooling circulation system.
[0007] Further, the water cooling circulation system includes a water tank and a cooling element arranged in the water tank. The water tank is connected to the water inlet and outlet through pipelines, and pumps are arranged on the pipelines.
[0008] Further, the filter screen is 200 mesh.
[0009] Further, the annular hot air duct is externally connected to a hot air system.
[0010] Further, the stock solution storage tank is supported above the nozzle through an annular wall.
[0011] Further, the nozzle is circular.
[0012] Further, the top of the stock solution storage tank is provided with an inlet.
[0013] The stock solution in the stock solution storage tank enters the micropores in the spinning area, and is extruded through them to form a liquid thin stream, which enters the duct. After being dried and solidified by the high-temperature hot air in the duct, it becomes fibers.
[0014] Since the high temperature of 300 °C in the duct will affect the extrusion of the micropore thin stream in the spinning area, a cooling water jacket is designed to cool the temperature of the spinneret; hot air is blown into the duct through the annular hot air duct to evaporate the solvent of the liquid filament bundle, and then the fiber is dried and solidified into shape.
[0015] In the present utility model, 2000 - 5000 spinning holes are arranged at the bottom end of the stock solution storage tank, and a temperature reduction component is arranged in the stock solution storage tank to cool the stock solution and the annular spinning area, avoiding deterioration due to the high temperature in the duct. Therefore, the spinning of large filament bundles can be realized, the production capacity can be improved, and the energy consumption can be reduced. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of a dry spinning duct head device for large filament bundles of polyimide fibers of the present utility model.
[0017] 1. Duct; 2. Spinning head; 21. Stock solution storage tank; 211. Inlet; 22. Annular spinning area; 3. Temperature reduction component; 31. Cooling water jacket; 32. Water cooling circulation system; 321. Water tank; 322. Cooling element; 323. Pipeline; 324. Pump; 4. Annular hot air duct; 5. Filter screen; 6. Hot air system; 7. Annular wall. Detailed Embodiment
[0018] The following are specific embodiments of the present utility model in combination with the drawings, and the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.
[0019] As Figure 1 shown, a dry spinning duct head device for large filament bundles of polyimide fibers of the present utility model includes a duct 1 and a spinning head 2. The spinning head 2 is installed above the duct 1. The spinning head 2 includes a stock solution storage tank 21. The bottom end of the stock solution storage tank 21 is provided with an annular spinning area 22. 2000 - 5000 spinning holes are evenly arranged in the annular spinning area 22. The outer wall of the stock solution storage tank 21 is provided with a temperature reduction component 3 for cooling the stock solution. An annular hot air duct 4 is also arranged above the duct 1. The stock solution storage tank 21 is located inside the ring of the annular hot air duct 4. One side of the annular hot air duct 4 close to the duct 1 is open, and a filter screen 5 is provided at the open end. Hot air enters the duct 1 through the filter screen 5. The filter screen 5 can be 200 meshes. The annular hot air duct 4 is externally connected with a hot air system 6, and the hot air system 6 continuously supplies hot air to the annular hot air duct 4.
[0020] The stock solution in the stock solution storage tank 21 enters the micropores of the annular spinning area 22, is extruded through them to form a liquid thin stream, enters the duct 1, and is dried and solidified into fibers by the high-temperature hot air in the duct 1.
[0021] Since the high temperature of 300 °C in the duct 1 will affect the extrusion of the micropore thin stream in the annular spinning area 22, a cooling water jacket 31 is designed to cool the temperature of the spinneret plate. The hot air inlet blows into the duct 1 through the annular hot air duct 4 by an external hot water system to evaporate the solvent of the liquid filament bundle, and then the fibers are dried and solidified into shape.
[0022] In the present utility model, 2000 - 5000 spinning holes are arranged at the bottom end of the stock solution storage tank 21, and a temperature reduction component 3 is arranged in the stock solution storage tank 21 to cool the stock solution and the annular spinning area 22, avoiding deterioration due to the high temperature in the duct 1, so that the spinning of large filament bundles can be realized, the production capacity can be improved, and the energy consumption can be reduced.
[0023] The structure of the temperature reduction component 3 has various forms. In this embodiment, the temperature reduction component 3 may include a cooling water jacket 31 sleeved on the outer wall of the stock solution storage tank 21, and the stock solution storage tank 21 is cooled by continuously introducing cold water into the cooling water jacket 31. The water inlet and outlet of the cooling water jacket 31 can be connected to a water cooling circulation system 32, and cold water is continuously provided to the cooling water jacket 31 through the water cooling circulation system 32.
[0024] The structure of the water cooling circulation system 32 has various forms. For example: the water cooling circulation system 32 may include a water tank 321 and a cooling member 322 arranged in the water tank 321. The water tank 321 is connected to the water inlet and outlet through a pipeline 323, and pumps 324 are provided on the pipeline 323.
[0025] The stock solution storage tank 21 can be erected above the duct 1 through an annular wall 7. The duct 1 can be circular.
[0026] An inlet 211 may be provided at the top of the stock solution storage tank 21. The stock solution is transported to the inlet 211 through a delivery pump 324 and enters the stock solution storage tank 21, then enters the micropores of the annular spinning area 22, is extruded through them to form a liquid thin stream, enters the duct 1, and is dried and solidified into fibers by the high-temperature hot air in the circular duct 1.
[0027] Since the high temperature of 300 °C in the duct 1 will affect the extrusion of the micropore thin stream in the annular spinning area 22, a cooling water jacket 31 is designed to cool the temperature of the annular spinning area 22. The hot air inlet blows into the duct 1 through the annular hot air duct 4 by an external hot air system 6 to evaporate the solvent of the liquid filament bundle, and then the fibers are dried and solidified into shape.
[0028] For those not covered above, the prior art applies.
[0029] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways of substitution, but will not deviate from the direction of the present utility model or exceed the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present utility model should all be included within the protection scope of the present utility model.
Claims
1. A dry spinning duct head device for large tow polyimide fibers, comprising a duct (1) and a spinning head (2), wherein the spinning head (2) is installed above the duct (1), and is characterized in that: The spinning head (2) includes a stock solution storage tank (21). The bottom end of the stock solution storage tank (21) is provided with an annular spinning area (22). 2000 - 5000 spinning holes are evenly arranged in the annular spinning area (22). The outer wall of the stock solution storage tank (21) is provided with a cooling component (3) for cooling the stock solution. An annular hot air duct (4) is further provided above the channel (1). The stock solution storage tank (21) is located inside the ring of the annular hot air duct (4). One side of the annular hot air duct (4) close to the channel (1) is open, and a filter screen (5) is provided at the open end.
2. The dry spinning channel head device for large tow polyimide fibers according to claim 1, characterized in that: The cooling component (3) includes a cooling water jacket (31) sleeved on the outer wall of the stock solution storage tank (21).
3. The dry spinning duct head device for large tow polyimide fiber according to claim 2, characterized in that: The water inlet and outlet of the cooling water jacket (31) are communicated with a water cooling circulation system (32).
4. The dry spinning nozzle head device for large tow polyimide fibers according to claim 3, characterized in that: The water cooling circulation system (32) includes a water tank (321) and a cooling element (322) arranged in the water tank (321). The water tank (321) is communicated with the water inlet and outlet through a pipeline (323), and pumps (324) are provided on the pipeline (323).
5. A dry spinning nozzle head device for large tow polyimide fibers according to claim 1, characterized in that: The filter screen (5) is 200 - mesh.
6. The dry spinning channel head device for large tow of polyimide fiber according to claim 1, characterized in that: The annular hot air duct (4) is externally connected to a hot air system (6).
7. The dry spinning channel head device for large tow polyimide fibers according to claim 1, characterized in that: The stock solution storage tank (21) is erected above the channel (1) through an annular wall (7).
8. The dry spinning channel head device for large tow polyimide fibers according to claim 1, characterized in that: The channel (1) is circular.
9. The dry spinning channel head device for large tow polyimide fibers according to claim 1, characterized in that: The top of the stock solution storage tank (21) is provided with an inlet (211).