A low and medium speed multi-spindle vertical vortex-free steady flow accelerated spinning forming method

Abstract

The application relates to the field of placement engineering technology, and discloses a middle-low-speed multi-spindle vertical vortex-free steady-flow accelerating spinning forming method, which comprises a spherical surface and a conical surface sealing adjusting device, the angle of the sealing adjusting device is adjusted, the sealing performance is ensured to be good, the angle adjustment range is 45 DEG, a level meter is used for horizontal calibration, the levelness error of a spinning cap is 0.05 mm, a liquid inlet pipe is opened, the flow is controlled, the coagulation liquid flows into a spinning forming device, the opening of a hole type distribution uniform flow plate is adjusted, the coagulation liquid is uniformly distributed, the liquid level is controlled to be 100 mm through a flow regulating valve, the height of a conical channel is adjusted to be 200 mm according to the characteristics of a filament bundle and process requirements, the taper ratio is 1:6, a resistance plate and a resistance groove are installed, the generation of liquid vortexes is effectively prevented, and the gap adjusting range is determined according to the air coagulation time requirement of the filament bundle. Through the technical scheme, the problems of uneven filament bundle forming and poor coagulation effect in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of textile engineering technology, specifically to a method for medium- and low-speed multi-spindle vertical vortex-free steady-flow accelerated spinning and forming. Background Technology

[0002] In the chemical fiber industry, the spinning process has a crucial impact on the quality of the filament bundle. Currently, horizontal spinning is a mainstream form of wet spinning. However, the contradiction between the solidification length and the operating space often leads to the filament bundle quality not reaching the ideal state. To overcome this problem, this invention proposes a medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning process. This process effectively avoids the operating space limitations in horizontal spinning through the vertical solidification structure, while providing a vortex-free solidification environment, which helps to improve the quality of the filament bundle. In addition, this process can be freely combined with horizontal tubular solidification or U-shaped tube solidification to meet the solidification and forming requirements of different fiber varieties.

[0003] Currently, vertical spinning equipment used in dry-jet wet spinning, although equipped with accelerators with lifting functions and complex vortex-overcoming structures, has limited its application in the field of medium and low-speed spinning due to its complex structural design and high cost. When used in medium and low-speed dry-jet wet spinning, this type of equipment is prone to problems such as yarn breakage and fuzzing. In addition, it occupies a large area, is cumbersome to operate, and is not conducive to improving production efficiency. With the rapid development of my country's chemical fiber industry and the continuous development of new yarn varieties, traditional spinning equipment can no longer meet the diverse process requirements. Therefore, developing a vortex-free accelerated spinning forming process that is simple in structure, low in cost, and suitable for medium and low-speed spinning has become an urgent need in the industry. Summary of the Invention

[0004] This invention proposes a medium-to-low speed multi-spindle vertical vortex-free steady flow accelerated spinning method, which solves the problems of uneven fiber bundle formation and poor coagulation effect in related technologies.

[0005] The technical solution of the present invention is as follows: A method for accelerating spinning in a low-to-medium speed, multi-spindle vertical direction without vortexes and with stable flow includes the following steps: Step S1: Before starting the spinning process, first install and set the spherical and conical sealing adjustment devices to ensure good sealing performance of the devices. Then, initially adjust the spinneret to a horizontal position. Step S2: Introduce the coagulated liquid into the spinning forming device through the inlet pipe, distribute the coagulated liquid evenly using the perforated distribution uniform plate, and precisely control the liquid level to a suitable position through the flow regulating valve to ensure the uniform distribution and stable liquid level of the coagulated liquid in the device. Step S3: After the filament bundle is ejected from the spinneret, it enters the conical channel to form a stable flow solidification zone. According to the characteristics of the filament bundle and the process requirements, the height and taper ratio of the conical channel are adjusted to form a stable flow solidification zone. Structures such as flow baffles and flow troughs are used to overcome possible liquid vortices. Step S4: Based on the required air solidification time of the filament bundle, finely adjust the gap between the spinneret and the steady flow solidification zone using the gap adjusting screw. Step S5: Inside the conical channel, install structures such as vortex flow-blocking spiral plates and internal vortex flow-blocking screws to enhance the anti-vortex effect and ensure the vertical downward flow of the filament bundle. Step S6: After passing through the steady flow solidification zone, the filament bundle enters the vertical channel for free fall acceleration. Utilizing the principle of free fall motion, the stretching process of the filament bundle is appropriately accelerated. Step S7: According to process requirements, the filament bundle can enter the horizontal or U-shaped solidification zone for subsequent solidification and shaping treatment. Then, according to the characteristics of the filament bundle, select appropriate solidification conditions and shaping methods to obtain ideal filament bundle quality and performance. Step S8: After the multi-spindle wire raising is stabilized, the liquid level of each forming device is precisely adjusted using a liquid level regulator to ensure that the liquid level of each device is at the same level.

[0006] As a preferred embodiment of the present invention, in step S1, before starting the spinning process, the spherical and conical sealing adjustment devices are first installed and set to ensure good sealing performance of the devices. Subsequently, the specific steps for initially adjusting the spinneret to a horizontal state are as follows: (1) Install spherical and conical sealing adjustment devices. By adjusting the angle of the sealing adjustment device, ensure good sealing performance. The angle adjustment range is 45°~60°. (2) Use a level to perform horizontal calibration so that the horizontal error of the spinneret is within 0.05mm~0.1mm.

[0007] As a preferred embodiment of the present invention, in step S2, the coagulation liquid is introduced into the spinning forming device through the inlet pipe, the coagulation liquid is evenly distributed using a perforated distribution and equalization plate, and the liquid level is precisely controlled to a suitable position by a flow regulating valve to ensure the uniform distribution and stable liquid level of the coagulation liquid in the device. The specific steps are as follows: (1) Open the inlet pipe and control the flow rate so that the coagulated liquid flows into the spinning forming device; (2) By adjusting the opening of the orifice distribution plate, the condensate is evenly distributed, and the liquid level is controlled at 100mm~150mm by the flow regulating valve.

[0008] In a preferred embodiment of the present invention, in step S3, after the filament bundle is ejected from the spinneret, it enters the conical channel to form a stable flow solidification zone. The height and taper ratio of the conical channel are adjusted according to the characteristics of the filament bundle and process requirements to form the stable flow solidification zone. The specific steps for overcoming possible liquid vortices using structures such as baffles and baffle grooves are as follows: (1) Adjust the height of the tapered channel to 200mm~300mm and the taper ratio to 1:6~1:8 according to the characteristics of the filament bundle and the process requirements; (2) Install baffles and baffles to effectively prevent the generation of liquid vortices.

[0009] As a preferred embodiment of the present invention, the specific steps in step S4, which involve finely adjusting the gap between the spinneret and the steady-flow solidification zone using a gap adjusting screw according to the required air solidification time of the filament bundle, are as follows: (1) Determine the gap adjustment range based on the required air solidification time of the filament bundle; (2) Use the gap adjusting screw to finely adjust the gap between the spinneret and the steady flow solidification zone. The gap should be between 1mm and 2mm.

[0010] As a preferred embodiment of the present invention, in step S5, the specific steps for installing vortex-blocking spiral plates and internal vortex-blocking screws inside the conical channel to enhance the anti-vortex effect and ensure the vertical downward flow of the filament bundle are as follows: (1) Select appropriate size vortex flow-blocking spiral plates and internal vortex flow-blocking screws according to the size and structure of the conical channel; (2) Installing vortex flow-blocking spiral plates and internal vortex flow-blocking screws can effectively prevent the generation of liquid vortices.

[0011] In a preferred embodiment of the present invention, in step S6, after the filament bundle passes through the steady-flow solidification zone, it enters the vertical channel for free-fall acceleration. The specific steps for appropriately accelerating the drawing process of the filament bundle using the principle of free-fall motion are as follows: (1) Ensure that the vertical channel is unobstructed to provide sufficient space for the free fall of the silk bundle; (2) By adjusting the length of the vertical channel to 1m~2m, the filament bundle can obtain appropriate free fall acceleration, thereby accelerating the stretching process.

[0012] As a preferred embodiment of the present invention, in step S7, depending on process requirements, the filament bundle can enter a horizontal or U-shaped solidification zone for subsequent solidification and shaping. The specific steps for selecting appropriate solidification conditions and shaping methods based on the characteristics of the filament bundle to obtain ideal filament bundle quality and performance are as follows: (1) Based on the characteristics of the filament bundle and the process requirements, the solidification temperature is set at 50~150°C, the humidity is set at 40~80%RH, the forming speed is set at 5~30m / min, and the forming pressure is set at 0.1~10MPa. (2) Introduce the filament bundle into the horizontal or U-shaped solidification zone for subsequent solidification and shaping treatment to ensure that the filament bundle is solidified and shaped under appropriate conditions in order to obtain ideal filament bundle quality and performance.

[0013] As a preferred embodiment of the present invention, in step S8, after the multi-spindle wire raising is stabilized, the liquid level of each forming device is precisely adjusted using a liquid level regulator to ensure that the liquid level of each device is at the same level. The specific steps are as follows: (1) After the multi-spindle wire raising is stable, start the liquid level regulator to perform preliminary detection and adjustment of the liquid level of each forming device so that the liquid level of each device is roughly at the same level. (2) Use a high-precision liquid level gauge to monitor the liquid level of each forming device in real time, and use a fine-tuning liquid level regulator to ensure that the liquid level of each device is accurately aligned and maintains a stable horizontal position.

[0014] The working principle and beneficial effects of this invention are as follows: 1. This invention employs a vortex-free vertical solidification structure, combined with spherical and conical sealing adjustment devices to ensure a horizontal spinning surface, enabling the filament bundle to be stably ejected vertically downwards. Simultaneously, the height and taper ratio of the conical channel create a stable solidification zone, allowing the filament bundle to achieve a certain strength and speed during the forming process. Furthermore, this invention effectively prevents the generation of liquid vortices by installing flow-blocking plates and flow-blocking grooves, thereby significantly improving the forming quality of the filament bundle. The implementation of these technical solutions not only reduces the occurrence of defects such as filament bundling, fuzzy filaments, and broken filaments, but also ensures the strength and quality of the filament bundle, achieving a significant improvement in the forming quality of the filament bundle.

[0015] This invention improves production efficiency by appropriately accelerating the fiber tow stretching process during spinning by utilizing the principle of free fall motion. Simultaneously, it adjusts the liquid level of multiple spindles using a coupling principle to ensure that the liquid levels of each device are at the same horizontal level, guaranteeing the consistency of fiber tow formation. This precise control of liquid level and flow rate allows the fiber tow to maintain a stable flow state during the forming process, thereby further improving the quality and performance of the fiber tow. Furthermore, the invention provides diverse solidification and forming conditions for the fiber tow through the setting of horizontal or U-shaped solidification zones, meeting the solidification and forming requirements of different fiber varieties. The implementation of these technical solutions not only improves production efficiency and fiber tow quality but also reduces production costs and failure rates, achieving optimization and upgrading of the spinning forming process. Detailed Implementation

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

[0017] Example 1 This embodiment proposes a method for accelerating and forming medium-to-low speed multi-spindle vertical vortex-free steady-flow spinning, including the installation of spherical and conical sealing adjustment devices. By adjusting the angle of the sealing adjustment devices, good sealing performance is ensured; the angle adjustment range is 45°. A level is used for horizontal calibration, ensuring the spinneret's horizontal error is within 0.05mm. The inlet pipe is opened, and the flow rate is controlled to allow the coagulated liquid to flow into the spinning forming device. The opening of the orifice-type distribution uniform plate is adjusted to ensure uniform distribution of the coagulated liquid, and the liquid level is controlled at 100mm using a flow regulating valve. Based on the fiber characteristics and process requirements, the height of the conical channel is adjusted to 200mm, and the taper ratio is 1:6. A flow-blocking plate and flow-blocking groove are installed to effectively prevent the generation of liquid vortices. The gap adjustment range is determined based on the required air coagulation time of the fiber bundle. The gap between the spinneret and the steady-flow coagulation zone is finely adjusted using a gap adjusting screw, with a gap of 1mm. Based on the size and structure of the conical channel, a vortex-blocking spiral plate and an internal vortex-blocking screw of appropriate size are selected and installed. The vortex flow-blocking spiral plate and internal vortex flow-blocking screw effectively prevent the generation of liquid vortices, ensuring unobstructed vertical channels and providing sufficient space for the free fall of the filament bundle. By adjusting the length of the vertical channel to 1m, the filament bundle obtains appropriate free fall acceleration, thereby accelerating the drawing process. Based on the filament bundle characteristics and process requirements, the solidification temperature is set at 50°C, the humidity at 40%RH, the forming speed at 5m / min, and the forming pressure at approximately 0.1MPa. The filament bundle is introduced into a horizontal or U-shaped solidification zone for subsequent solidification and forming treatment, ensuring that the filament bundle solidifies and forms under appropriate conditions to obtain ideal filament bundle quality and properties. After the multi-spindle fiber raising stabilizes, the liquid level regulator is activated to perform preliminary detection and adjustment of the liquid level in each forming device, ensuring that the liquid level in each device is approximately at the same horizontal level. A high-precision liquid level gauge is used to monitor the liquid level in each forming device in real time. By fine-tuning the liquid level regulator, it is ensured that the liquid level in each device is precisely aligned and maintains a stable horizontal position.

[0018] In this embodiment, during the spinning process, the sealing adjustment device is a key component ensuring the stable and leak-free flow of coagulation liquid into the spinning device. Through installation and calibration, the angle formed by the spherical and conical surfaces is adjusted to optimize the sealing performance between the spinneret and the coagulation liquid channel, thereby ensuring the stability of the spinning process and product quality. Installation and calibration are required during the preparation stage. The sealing adjustment device, composed of spherical and conical surfaces, is installed to ensure that the coagulation liquid does not leak during spinning. During installation, the angle of the sealing adjustment device is adjusted to maintain it within a preset range of 52.5°. This angle adjustment improves the sealing performance between the spinneret and the coagulation liquid channel, effectively preventing leakage during the spinning process. Next, a level is used to calibrate the spinneret horizontally. By fine-tuning the position and angle of the spinneret, its levelness error is ensured. By controlling the deviation within 0.075mm through the above steps, the deviation of the filament bundle during the forming process can be reduced and the vertical fall of the filament bundle can be ensured. Subsequently, the liquid adjustment and coagulation liquid uniform distribution stage is entered. The liquid inlet pipe is opened and the coagulation liquid is smoothly flowed into the spinning forming device through flow control. The distribution of the coagulation liquid is adjusted by using a perforated distribution uniform plate. By changing the opening of the uniform plate, the coagulation liquid is ensured to be evenly distributed in the device. At the same time, the liquid level is controlled by the flow regulating valve and maintained at a height of 125mm to ensure that the filament bundle can obtain stable coagulation conditions during the forming process. In order to cope with different filament bundle characteristics and process requirements, the height of the conical channel is adjusted to 250mm and the taper ratio is set to 1:7, which can form a stable coagulation zone, so that the filament bundle can obtain good shape and strength during the forming process. To prevent liquid vortices from affecting the quality of the filament forming, baffle plates and baffle grooves are installed. These effectively prevent the liquid from forming vortices in the channel, ensuring the stability of the filament during the solidification process. Next, according to the air solidification time requirements of the filament, the gap between the spinneret and the steady-flow solidification zone is adjusted using a gap adjusting screw. By fine-tuning the gap adjusting screw, the gap is kept at 1.5mm to meet the air solidification time requirements of the filament during the solidification process. To further enhance the anti-vortex effect, appropriate vortex baffle spiral plates and internal vortex baffle screws are selected and installed according to the size and structure of the conical channel. This effectively prevents the generation of liquid vortices and ensures that the filament achieves better forming quality during the solidification process. Finally, the vertical channel is adjusted and the solidification conditions are set. By adjusting the length of the vertical channel to 1.5m, a suitable free-fall space is provided for the filament bundle to accelerate the drawing process. At the same time, the solidification temperature is set to 100°C, the humidity to 60%RH, the forming speed to 17.5m / min, and the forming pressure to 5.05MPa. Precise control of these parameters ensures that the filament bundle solidifies and forms under suitable conditions, obtaining ideal filament bundle properties. During operation, the liquid level regulator is activated to initially detect and adjust the liquid level of each forming device, so that the liquid level of each device is approximately at the same level. Then, a high-precision liquid level gauge is used to monitor the liquid level of each forming device in real time, and the liquid level regulator is finely adjusted to ensure that the liquid level of each device is precisely aligned and maintains a stable horizontal position. This step ensures that the filament bundle obtains consistency and high quality during the forming process.

[0019] Example 2 Based on the same concept as Embodiment 1 above, this embodiment also proposes the following: installing spherical and conical sealing adjustment devices; ensuring good sealing performance by adjusting the angle of the sealing adjustment devices, with an angle adjustment range of 52.5°; using a level for horizontal calibration to ensure the spinneret's horizontal error is within 0.075mm; opening the inlet pipe and controlling the flow rate to allow the coagulated liquid to flow into the spinning forming device; adjusting the opening of the orifice-type distribution uniform plate to ensure uniform distribution of the coagulated liquid; and controlling the liquid level at 125mm using a flow regulating valve; adjusting the height of the conical channel to 250mm and the taper ratio to 1:7 according to the fiber characteristics and process requirements; installing a flow baffle plate and flow baffle groove to effectively prevent the generation of liquid vortices; determining the gap adjustment range based on the required air coagulation time of the fiber; and finely adjusting the gap between the spinneret and the stable flow coagulation zone using a gap adjusting screw to a gap of 1.5mm; and selecting a suitable vortex flow baffle spiral plate and internal vortex flow baffle screw based on the size and structure of the conical channel, and installing the vortex flow baffle screw. The rotating plate and internal vortex flow-blocking screw effectively prevent the generation of liquid vortices, ensuring unobstructed vertical channels and providing sufficient space for the free fall of the filament. By adjusting the length of the vertical channel to 1.5m, the filament obtains appropriate free fall acceleration, thereby accelerating the drawing process. Based on the filament characteristics and process requirements, the solidification temperature is set at 100°C, the humidity at 60%RH, the forming speed at 17.5m / min, and the forming pressure at a typical 5.05MPa. The filament is introduced into a horizontal or U-shaped solidification zone for subsequent solidification and forming treatment, ensuring that the filament solidifies and forms under appropriate conditions to obtain ideal filament quality and properties. After the multi-spindle filament raising stabilizes, the liquid level regulator is activated to initially detect and adjust the liquid level of each forming device, ensuring that the liquid level of each device is approximately at the same horizontal level. A high-precision liquid level gauge is used to monitor the liquid level of each forming device in real time. By fine-tuning the liquid level regulator, the liquid level of each device is ensured to be precisely aligned and maintain a stable horizontal position.

[0020] In this embodiment, the sealing adjustment device is a key component in ensuring the stable and leak-free flow of coagulation liquid into the spinning forming device during the spinning process. Through installation and calibration, the angle formed by the spherical and conical surfaces is adjusted to precisely control the angle within a range of 52.5°, ensuring leak-free flow of coagulation liquid during spinning. First, a level is used to calibrate the spinneret to ensure the levelness error does not exceed 0.075mm. This is a crucial step in ensuring the vertical descent of the filament and the forming quality. Next, the inlet pipe is opened and the flow rate is precisely controlled to ensure the coagulation liquid flows smoothly into the spinning forming device. By adjusting the opening of the orifice-type distribution plate, the coagulation liquid is evenly distributed within the device. Simultaneously, the flow regulating valve precisely controls the liquid level, maintaining it at 125mm to ensure the filament is formed at a constant liquid level. To meet different filament characteristics and process requirements, the height of the conical channel is adjusted to 250mm, and the taper ratio is set to 1:7. This design helps to form a stable coagulation zone, providing an ideal forming environment for the filament. To prevent liquid vortices from adversely affecting the filament forming process, this embodiment also installs a flow-blocking plate and a flow-blocking groove, effectively preventing the generation of liquid vortices. Simultaneously, based on the required air solidification time of the filament, a gap adjustment screw is used to finely adjust the gap between the spinneret and the stable flow solidification zone, ensuring the gap remains at 1.5mm to meet the specific forming requirements of the filament. To further enhance the anti-vortex effect, this embodiment also selects and installs appropriately sized vortex-blocking spiral plates and internal vortex-blocking screws based on the size and structure of the conical channel. These devices further prevent the generation of liquid vortices, ensuring better quality of the filament during the forming process. Regarding the vertical channel, this embodiment adjusts the channel length to 1.5m, providing sufficient free-fall space for the filament, which is beneficial for accelerating the drawing process. Furthermore, based on the filament characteristics and process requirements, the solidification temperature is set to 100°C, the humidity to 60%RH, the forming speed to 17.5m / min, and the forming pressure to 5.05MPa. The precise control of these parameters provides ideal solidification and forming conditions for the filament. Finally, once the multi-spindle spinning has stabilized, the liquid level regulator is activated to perform preliminary detection and adjustment of the liquid level in each forming device. A high-precision liquid level gauge is used to monitor the liquid level in each device in real time, and fine adjustments are made to ensure that the liquid levels in each device are precisely aligned and maintain a stable horizontal position. This step ensures the stability of the spinning forming system and the forming quality of the filament bundle.

[0021] Example 3 Based on the same concept as Embodiment 1 above, this embodiment also proposes the following: installing spherical and conical sealing adjustment devices; ensuring good sealing performance by adjusting the angle of the sealing adjustment devices (angle adjustment range: 60°); using a level for horizontal calibration to ensure the spinneret's horizontal error is within 0.1mm; opening the inlet pipe and controlling the flow rate to allow the coagulated liquid to flow into the spinning forming device; adjusting the opening of the orifice-type distribution uniform plate to ensure uniform distribution of the coagulated liquid; controlling the liquid level at 150mm using a flow regulating valve; adjusting the height of the conical channel to 300mm and the taper ratio to 1:8 according to the fiber characteristics and process requirements; installing a flow baffle plate and flow baffle groove to effectively prevent the generation of liquid vortices; determining the gap adjustment range based on the required air coagulation time of the fiber; finely adjusting the gap between the spinneret and the stable flow coagulation zone using a gap adjusting screw to a gap of 2mm; selecting a suitable vortex flow baffle spiral plate and internal vortex flow baffle screw based on the size and structure of the conical channel; and installing the vortex flow baffle screw. The rotating plate and internal vortex flow-blocking screw effectively prevent the generation of liquid vortices, ensuring unobstructed vertical channels and providing sufficient space for the free fall of the filament. By adjusting the length of the vertical channel to 2m, the filament obtains appropriate free fall acceleration, thereby accelerating the drawing process. Based on the filament characteristics and process requirements, the solidification temperature is set at 150°C, the humidity at 80%RH, the forming speed at 30m / min, and the forming pressure at approximately 10MPa. The filament is introduced into a horizontal or U-shaped solidification zone for subsequent solidification and forming treatment, ensuring that the filament solidifies and forms under appropriate conditions to obtain ideal filament quality and properties. After the multi-spindle filament raising stabilizes, the liquid level regulator is activated to initially detect and adjust the liquid level of each forming device, ensuring that the liquid level of each device is approximately at the same horizontal level. A high-precision liquid level gauge is used to monitor the liquid level of each forming device in real time. By fine-tuning the liquid level regulator, the liquid level of each device is ensured to be precisely aligned and maintain a stable horizontal position.

[0022] In this embodiment, firstly, a sealing adjustment device composed of a spherical and a conical surface was installed, and its angle was adjusted within a range of 60° to ensure excellent sealing performance. This step is crucial to prevent leakage of coagulant during spinning. Next, the spinneret was leveled using a level to ensure that the levelness error did not exceed 0.1mm. This step is essential to ensure the vertical fall of the filament bundle and the forming quality. Subsequently, the inlet pipe was opened and the flow rate was controlled to ensure that the coagulant could flow smoothly into the spinning forming device. By adjusting the opening of the orifice-type distribution uniform plate, the uniform distribution of the coagulant in the device was achieved. At the same time, the liquid level was precisely controlled using a flow regulating valve to stabilize it at a height of 150mm. To meet the different characteristics and process requirements of filaments, the height of the conical channel was adjusted to 300mm according to actual needs, and the taper ratio was set to 1:8. This design helps to form a stable solidification zone and provides an ideal forming environment for the filaments. To prevent liquid vortices from adversely affecting the filament forming, baffle plates and baffle grooves were installed to effectively prevent the generation of liquid vortices. In addition, according to the air solidification time requirements of the filaments, the gap between the spinneret and the stable solidification zone was finely adjusted using gap adjustment screws to ensure that the gap is maintained at 2mm to meet the specific forming requirements of the filaments. To further enhance the anti-vortex effect, vortex baffle spiral plates and internal vortex baffle screws of appropriate size were selected and installed according to the size and structure of the conical channel. These devices can further prevent the generation of liquid vortices and ensure that the filaments obtain better quality during the forming process. In terms of the vertical channel, by adjusting the channel length to 2m, sufficient free fall space was provided for the filament bundle, which helped to accelerate the drawing process. At the same time, according to the characteristics of the filament bundle and process requirements, the solidification temperature was set to 150°C, the humidity to 80%RH, the forming speed to 30m / min, and the forming pressure to 10MPa. The precise control of these parameters provided ideal solidification and forming conditions for the filament bundle. Next, after the multi-spindle filament raising stabilized, the liquid level regulator was activated to conduct preliminary detection and adjustment of the liquid level of each forming device. The liquid level of each device was monitored in real time using a high-precision liquid level gauge, and fine adjustments were made to ensure that the liquid level of each device was accurately aligned and maintained in a stable horizontal position. Finally, the filament bundle was introduced into the horizontal or U-shaped solidification zone for subsequent solidification and forming treatment. This step ensured that the filament bundle solidified and formed under appropriate conditions, thereby obtaining ideal filament bundle quality and performance.

[0023] Comparative Example 1 The only difference from Example 1 is that the angle of the sealing adjustment device is adjusted from a range of 45° to a range of arbitrarily set between 30° and 60°, which is a wider range.

[0024] Comparative Example 2 The only difference from Example 1 is that the height of the tapered channel, which is 200mm and the taper ratio is 1:6, is adjusted to a height between 150mm and 250mm and a taper ratio between 1:5 and 1:7. The fiber bundle forming quality data obtained by the methods in Example 1, Example 2, Example 3 and Comparative Example 2 were analyzed to obtain a comparison of the data on fiber bundle forming quality uniformity, fiber bundle surface smoothness and stretching effect, as shown in Table 1. Table 1

[0025] illustrate: Uniformity of filament forming quality: This indicates the degree of uniformity of the filaments during the forming process; the higher the value, the more uniform the filaments. Surface smoothness of filament bundle: This indicates the smoothness of the filament bundle surface; the higher the value, the smoother the surface. Stretch effect: Based on the comprehensive evaluation of the tensile properties and appearance quality of the filament bundle, it is divided into three levels: excellent, good, and poor. Compared with Comparative Example 1, Comparative Example 1 did not have precise control over the angle adjustment of the sealing adjustment device and the horizontal calibration of the spinneret. Due to the inaccurate angle adjustment and the large error in the horizontal calibration, the sealing performance decreased, which increased the risk of coagulation leakage, affected the stability of spinning formation, and may also lead to a decrease in the quality of filament formation, such as uneven filaments and rough surfaces. Compared with Comparative Example 2, Example 1 did not precisely control the height and taper ratio of the conical channel, but instead used a wider setting range. This resulted in the filament bundle failing to achieve the desired forming effect during the forming process. Compared with Example 1, the filament bundle forming quality of Comparative Example 2 was significantly uneven, with a rough surface and poor stretching effect. This imprecise parameter setting directly affected the forming quality and performance of the filament bundle.

[0026] As can be seen from the table, in Examples 1, 2, and 3, due to the precise adjustment of the tapered channel parameters, the uniformity of the filament forming quality, the surface smoothness, and the stretching effect are all relatively high. However, in Comparative Example 2, due to the inaccuracy of the tapered channel parameters, the uniformity of the filament forming quality and the surface smoothness are significantly reduced, and the stretching effect is also poor. This reflects the importance of precisely adjusting the tapered channel parameters for improving the quality of filament forming.

[0027] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for medium-to-low speed multi-spindle vertical vortex-free steady-flow accelerated spinning and forming, characterized in that, Includes the following steps: Step S1: Before starting the spinning process, first install and set the spherical and conical sealing adjustment devices to ensure good sealing performance of the devices. Then, initially adjust the spinneret to a horizontal position. Step S2: Introduce the coagulated liquid into the spinning forming device through the inlet pipe, distribute the coagulated liquid evenly using the perforated distribution uniform plate, and precisely control the liquid level to a suitable position through the flow regulating valve to ensure the uniform distribution and stable liquid level of the coagulated liquid in the device. Step S3: After the filament bundle is ejected from the spinneret, it enters the conical channel to form a stable flow solidification zone. According to the characteristics of the filament bundle and the process requirements, the height and taper ratio of the conical channel are adjusted to form a stable flow solidification zone. The flow baffle and flow trough structure are used to overcome possible liquid vortices. Step S4: Based on the required air solidification time of the filament bundle, finely adjust the gap between the spinneret and the steady-flow solidification zone using the gap adjusting screw. Step S5: Inside the conical channel, install a vortex flow-blocking spiral plate and an internal vortex flow-blocking screw structure to enhance the anti-vortex effect and ensure the vertical downward flow of the filament bundle. Step S6: After passing through the steady flow solidification zone, the filament bundle enters the vertical channel for free fall acceleration. Utilizing the principle of free fall motion, the stretching process of the filament bundle is appropriately accelerated. Step S7: According to process requirements, the filament bundle enters the horizontal or U-shaped solidification zone for subsequent solidification and shaping treatment. Then, according to the characteristics of the filament bundle, the appropriate solidification conditions and shaping methods are selected to obtain the ideal filament bundle quality and performance. Step S8: After the multi-spindle wire raising is stabilized, the liquid level of each forming device is precisely adjusted using a liquid level regulator to ensure that the liquid level of each device is at the same level. In step S1, before starting the spinning process, the spherical and conical sealing adjustment devices are first installed and set to ensure good sealing performance. Then, the specific steps for initially adjusting the spinneret to a horizontal state are as follows: (1) Install spherical and conical sealing adjustment devices. By adjusting the angle of the sealing adjustment device, ensure good sealing performance. The angle adjustment range is 45°~60°. (2) Use a level to perform horizontal calibration so that the horizontality error of the spinneret is within 0.05mm~0.1mm; In step S3, after the filament bundle is ejected from the spinneret, it enters the conical channel to form a stable flow solidification zone. The height and taper ratio of the conical channel are adjusted according to the characteristics of the filament bundle and process requirements to form this stable flow solidification zone. The specific steps for overcoming potential liquid vortices using baffle plates and baffle groove structures are as follows: (1) Adjust the height of the tapered channel to 200mm~300mm and the taper ratio to 1:6~1:8 according to the characteristics of the filament bundle and the process requirements; (2) Install baffles and baffles to effectively prevent the generation of liquid vortices.

2. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S2, the coagulation liquid is introduced into the spinning forming device through the inlet pipe, the coagulation liquid is evenly distributed using a perforated distribution plate, and the liquid level is precisely controlled to a suitable position using a flow regulating valve to ensure the uniform distribution and stable liquid level of the coagulation liquid within the device. The specific steps are as follows: (1) Open the inlet pipe and control the flow rate so that the coagulated liquid flows into the spinning forming device; (2) By adjusting the opening of the orifice distribution plate, the condensate is evenly distributed, and the liquid level is controlled at 100mm~150mm by the flow regulating valve.

3. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S4, the specific steps for finely adjusting the gap between the spinneret and the steady-flow solidification zone using the gap adjusting screw, based on the required air solidification time of the filament bundle, are as follows: (1) Determine the gap adjustment range based on the required air solidification time of the filament bundle; (2) Use the gap adjusting screw to finely adjust the gap between the spinneret and the steady flow solidification zone. The gap should be between 1mm and 2mm.

4. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S5, the specific steps for installing a vortex-blocking spiral plate and an internal vortex-blocking screw structure inside the conical channel to enhance the anti-vortex effect and ensure the vertical downward flow of the filament bundle are as follows: (1) Select appropriate size vortex flow-blocking spiral plates and internal vortex flow-blocking screws according to the size and structure of the conical channel; (2) Installing vortex flow-blocking spiral plates and internal vortex flow-blocking screws can effectively prevent the generation of liquid vortices.

5. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S6, after the filament bundle passes through the steady-flow solidification zone, it enters the vertical channel for free-fall acceleration. The specific steps for appropriately accelerating the filament bundle drawing process using the principle of free-fall motion are as follows: (1) Ensure that the vertical channel is unobstructed to provide sufficient space for the free fall of the silk bundle; (2) By adjusting the length of the vertical channel to 1m~2m, the filament bundle can obtain appropriate free fall acceleration, thereby accelerating the stretching process.

6. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S7, according to process requirements, the filament bundle enters a horizontal or U-shaped solidification zone for subsequent solidification and shaping. The specific steps for obtaining ideal filament bundle quality and performance by selecting appropriate solidification conditions and shaping methods based on the characteristics of the filament bundle are as follows: (1) Based on the characteristics of the filament bundle and the process requirements, the solidification temperature is set at 50~150°C, the humidity is set at 40~80%RH, the forming speed is set at 5~30m / min, and the forming pressure is set at 0.1~10MPa. (2) Introduce the filament bundle into the horizontal or U-shaped solidification zone for subsequent solidification and shaping treatment to ensure that the filament bundle is solidified and shaped under appropriate conditions in order to obtain ideal filament bundle quality and performance.

7. The method for medium-low speed multi-spindle vertical vortex-free steady flow accelerated spinning forming according to claim 1, characterized in that, In step S8, after the multi-spindle wire raising is stabilized, the liquid level of each forming device is precisely adjusted using a liquid level regulator to ensure that the liquid level of each device is at the same level. The specific steps are as follows: (1) After the multi-spindle wire raising is stable, start the liquid level regulator to perform preliminary detection and adjustment of the liquid level of each forming device so that the liquid level of each device is near the same horizontal plane. (2) Use a high-precision liquid level gauge to monitor the liquid level of each forming device in real time, and use a fine-tuning liquid level regulator to ensure that the liquid level of each device is accurately aligned and maintains a stable horizontal position.

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