Rail-mounted wire drawing system and wire drawing method

By setting up a rail-type wire pulling system in the box of the chemical fiber production equipment, and using the drive unit to drive the traction device to drive the fibers to travel along the track, the problems of frequent manual operations and interruption in the prior art are solved, and the effect of reducing manual risks and improving production efficiency is achieved.

CN119824559APending Publication Date: 2025-04-15CHINESE TEXTILE ACAD
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Patent Information

Application Number
CN202311327151.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-10-13
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

During the production process of chemical fibers, there are still a large number of manual operation links during use of existing equipment, and once problems such as wire breakage occur, the wire needs to be re-pulled, resulting in interruption of production, increasing the risk of manual operation and low production efficiency.

Method used

A rail-type wire drawing system is designed. By setting a track in the box, the driving part drives the traction device to drive the fibers to travel from the inlet to the outlet along the preset path of the track, avoiding direct contact between the operator and the internal environment of the spinning system, reducing manual operation risks and improving production efficiency.

Benefits of technology

Without destroying the internal temperature, pressure, component composition and concentration of the box of the spinning equipment, it can effectively transport fibers to a designated position, reduce manual operation risks and improve production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a rail-mounted wire drawing system and method, the rail-mounted wire drawing system is arranged in a box body of spinning equipment, the box body is provided with an inlet and an outlet, the rail-mounted wire drawing system comprises a rail, a tractor and a driving part, the rail is arranged in the box body and is provided with a preset path; the tractor is arranged on the track in a sliding manner and is used for dragging fibers to advance from the inlet to the outlet along a preset path of the track; and the driving part is used for providing acting force for the tractor to slide along a preset path of the track. The rail type yarn drawing system is arranged in the box body of the spinning equipment, the rail is arranged in the box body, the driving part drives the drawing device to drive the fibers to advance from the inlet to the outlet along the preset path of the rail, and the fibers can be drawn out under the condition that the temperature, pressure, component composition, concentration and other conditions in the box body of the spinning equipment are not damaged. Fibers can be conveyed to designated positions in box bodies with different sizes, the operation difficulty is reduced, and the production efficiency is improved.
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Description

Technical Field

[0001] The invention belongs to the technical field of chemical fiber machinery manufacturing, and in particular relates to a track-type wire drawing system and a wire drawing method. Background Art

[0002] In the process of chemical fiber production and manufacturing, there is usually a high temperature, high humidity and even toxic and harmful environment, and the filaments need to be heated and stretched. However, the coagulation bath, stretching hot box and other equipment currently used still have a lot of manual operation links during use. In addition, once the problem of broken filaments occurs during the production process, the filaments have to be re-stretched. Once the chemical fiber production process is interrupted, the spinning system needs to be opened, and the high temperature, high humidity and even toxic and harmful environment inside it poses a threat to the human body. In addition, with the development of the modern chemical fiber industry, there are more and more equipment in the production line. In order to improve the spinning efficiency and reduce the hidden dangers of spinning, the effective size of each equipment is required to be the same, which increases the design and investment cost of the equipment.

[0003] Chinese patent application number 201810218571.0 discloses a steam bath hot stretching system and a hot stretching method. The steam bath hot stretching device includes a hot stretching wheel, a wire guide wheel, a hot bath heating box and a steam tank. The hot stretching wheel and the wire guide wheel are respectively installed and fixed at the two ends of the hot bath heating box through a base; the steam tank is connected to the hot bath heating box through an air inlet pipe; the wire strip is drawn into the hot bath heating box through the wire guide wheel, and then discharged through the hot stretching wheel; the hot bath heating box directly heats the wire strip passing through it through hot steam.

[0004] In the above technical solution, a large number of manual operation links are reduced by setting up a steam bath hot stretching device. In addition, if the wire breaks during the production process, the steam supply needs to be stopped to reduce the operating risks of the workers. This will also cause changes in the spinning environment parameters and reduce production efficiency.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. On the one hand, a track-type silk drawing system is provided, which is arranged in a box. By arranging a track on the inner wall of the box, a driving unit drives a traction device to drive the fiber to move from the entrance to the exit along a preset path of the track. The fiber can be transported to a designated position without destroying the temperature, pressure, component composition and concentration conditions inside the box of the spinning equipment, thereby avoiding direct contact between the operator and the internal environment of the spinning system, reducing manual risks and improving production efficiency.

[0007] Another aspect of the present invention provides a wire drawing method applied to a track-type wire drawing system.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A track-type wire drawing system is arranged in a box of a spinning device, and the box has an inlet and an outlet, comprising:

[0010] A track is arranged in the box, and a preset path is arranged on the track;

[0011] A tractor, slidably disposed on the track, for pulling the fiber along a preset path of the track from the inlet to the outlet;

[0012] The driving part is used to provide a force for the tractor to slide along a preset path of the track.

[0013] Preferably, the track includes a first track and a second track connected to each other, the connection between the first track and the second track is a bending portion, the first track extends from the direction of the entrance to the direction opposite to the entrance, and changes direction at the bending portion to extend along the second track toward the exit, and the bending portion is arranged at the bottom of the box.

[0014] Preferably, a wire drawing roller is provided on the inner side of the bending portion and near the bending portion, for guiding the fiber to change direction from the extension direction of the first track to the extension direction of the second track.

[0015] Preferably, the track further includes a third track, and two ends of the third track are respectively connected to one end of the first track at an entrance position and one end of the second track at an exit position to form a closed track structure.

[0016] Preferably, the track-type wire pulling system further comprises a connecting device, one end of which is connected to the tractor and the other end of which is flexibly connected to the track.

[0017] Preferably, the tractor comprises a first clamping portion and a second clamping portion, and a clamping space is formed between the first clamping portion and the second clamping portion for clamping the fiber.

[0018] Preferably, the first clamping portion and / or the second clamping portion has a spring structure for deformation restoration.

[0019] Preferably, the tractor further comprises a connecting portion, and both ends of the first clamping portion and the second clamping portion are connected to the connecting portion.

[0020] Preferably, the first clamping part and the second clamping part each include a multi-layer structure connected to each other, and each layer slides and retracts along the length direction from one end to the other end of the corresponding clamping part to change the length of the tractor.

[0021] A wire drawing method, characterized in that:

[0022] Connecting the fiber to the tractor, the tractor is located at the entrance of the preset path of the track;

[0023] The traction fiber travels along a preset path of the track from the entrance to the exit;

[0024] The tractor is at the exit of the preset path of the track, and the fiber connected to the tractor is released.

[0025] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0026] The present invention arranges a track in a box body, and utilizes a driving unit to drive a traction device to drive the fiber to move along a preset path of the track from an entrance to an exit. The fiber can be transported to a designated position without destroying the temperature, pressure, component composition, concentration and other conditions inside the box body of the spinning equipment, thereby avoiding direct contact between operators and the internal environment of the spinning system, reducing manual operation risks and improving production efficiency.

[0027] The connection device of the present invention connects the tractor to the track by a flexible connection, and this connection method can be used in the boxes of most spinning equipment, and has a wide range of applications. Spinning equipment such as coagulation bath tanks, extraction tanks, pretreatment tanks, drafting hot boxes and hot bath heating boxes, due to the different box sizes of various spinning equipment, this connection method is suitable for tracks of various sizes.

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0030] Figure 1 It is a structural cross-sectional view of a track of a single chain structure of the track-type wire drawing system of the present invention installed on the inner wall of the box;

[0031] Figure 2 It is a structural cross-sectional view of a track with a double groove structure of the track type wire drawing system of the present invention installed on the inner wall of the box;

[0032] Figure 3 It is a schematic structural diagram of the first clamping part and the second clamping part of the tractor of the present invention being fitted together;

[0033] Figure 4 It is a schematic diagram of the structure of the clamping space generated between the first clamping part and the second clamping part of the tractor of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the first clamping part and the second clamping part of the tractor of the present invention after the layers slide.

[0035] In the figure: 1. box body; 11. entrance; 12. exit; 13. track; 131. first bending portion; 1311. first track; 132. bending portion; 1321. second track; 133. second bending portion; 1331. third track; 14. wire drawing roller; 15. support; 16. connecting device; 17. inner wall; 18. transmission portion; 19. driving portion; 2. tractor; 21. first clamping portion; 211. first clamping portion layer; 22. second clamping portion; 221. second clamping portion layer; 23. clamping space; 24. connecting portion.

[0036] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figure 1As shown, the present invention provides a track-type silk drawing system, which is described by taking the application in a water tank as an example. The track-type silk drawing system is arranged in a box body 1 of a spinning device, and the box body 1 is provided with an inlet 11 and an outlet 12 (the straight line with an arrow from the inlet 11 to the outlet 12 is the movement trajectory of the fiber) and includes:

[0041] A track 13 is provided in the box 1, and a preset path is set on the track 13;

[0042] A tractor 2 is slidably disposed on the track 13 and is used to pull the fiber along a preset path of the track 13 from the inlet 11 to the outlet 12;

[0043] The driving unit 19 is used to provide a force for the tractor 2 to slide along a preset path of the track 13 .

[0044] The fiber of the present invention enters through the inlet 11 of the box 1 and is connected to the tractor 2 on the track 13 inside the box 1. Driven by the driving part 19, the tractor 2 drives the fiber from the inlet 11 of the box 1 to the outlet 12, which not only smoothly transports the fiber to the next process, but also avoids direct contact between the operator and the liquid inside the box 1 without destroying the temperature, composition and concentration of the internal temperature of the box 1, thereby reducing the risk of manual operation and improving production efficiency.

[0045] The track 13 of the present invention includes a first track 1311 and a second track 1321 connected to each other, and the connection between the first track 1311 and the second track 1321 is a bending portion 132. The first track 1311 extends from the direction of the entrance 11 to the side opposite to the entrance 11, and changes direction at the bending portion 132 to extend along the second track 1321 toward the direction of the exit 12. The bending portion 132 is arranged at the bottom of the box body 1.

[0046] Preferably, the first track 1311 and the second track 1321 have a smooth transition through the bending portion 132, and the bending portion 132 is arranged at the bottom of the water tank body 1. Driven by the tractor 2, the fiber enters the water tank and contacts with the water inside the water tank, ensuring that the fiber is more resilient.

[0047] The inner side of the bending portion 132 of the present invention and near the bending portion 132 is provided with a drawing roller 14 for guiding the fiber to change from the extension direction of the first track 1311 to the extension direction of the second track 1321. The inner side of the present invention refers to the side of the bending portion 132 away from the bottom of the box 1.

[0048] Preferably, at least one wire drawing roller 14 is provided, and is a columnar structure with a certain height, fixed to the inner wall 17 of the box body 1 by a support 15. When the tractor 2 drives the fiber to move, the fiber passes through the bending portion 132, and the setting of the wire drawing roller 14 realizes the effect of reversing the direction of fiber movement.

[0049] The track 13 of the present invention further includes a third track 1331 , both ends of which are respectively connected to one end of the first track 1311 at the entrance 11 and one end of the second track 1321 at the exit 12 , forming a closed track structure.

[0050] Preferably, the third track 1331 is connected to one end of the first track 1311 at the entrance 11 to form a first bending portion 131, and the third track 1331 is connected to one end of the second track 1321 at the exit 12 to form a second bending portion 133, thereby forming a closed track structure to ensure that the tractor 2 can easily return to the entrance 11 position of the first track 1311 after running along the preset path of the track 13.

[0051] The track-type wire pulling system of the present invention further comprises a connecting device 16 , one end of which is connected to the tractor 2 , and the other end of which is softly connected to the track 13 , so that the tractor 2 is slidably arranged on the track 13 .

[0052] Preferably, since the tractor 2 and the track 13 are in a flexible connection, the tractor can be ensured to rotate along the working surface of the fiber, that is, to rotate slightly along the length direction of the track 13, so that the tractor can pull the fiber. In addition, the plane where the tractor 2 is located is at a right angle to the plane formed by the fiber entering the box 1.

[0053] Preferably, the connecting device 16 can be a spring, and the spring is used to connect the tractor 2 to the track 13 in a flexible connection manner. Due to the flexible connection manner, the tractor 2 can be applied to tracks 13 of various widths.

[0054] like Figure 1 As shown, the track 13 of the present invention is a single chain structure, the traction device 2 is arranged on the track 13, and a rotatable transmission part 18 is arranged in the box 1. The transmission part 18 can be a gear. The track 13 of the single chain structure is meshed with the gear, and the gear is rotatably arranged on the inner wall 17 of the box 1 through a crank. A driving part 19 is arranged on the outer wall of the box 1, and the driving part 19 is coaxially arranged with the gear. The force generated by the driving part 19 drives the transmission part 18 to move, drives the gear to rotate, and drives the single chain to rotate, so that the traction device 2 drives the fiber to move along the preset path of the track 13 of the single chain structure toward the outlet 12 of the box 1.

[0055] The driving part 19 of the present invention can also be manual or electric. When the driving part 19 is a motor, the motor is started to control the rotation of the driving part 19 to realize the operation of the track 13 and drive the tractor 2 to move. When the driving part 19 is manual, the rotation of the driving part 19 is manually controlled.

[0056] like Figure 2 As shown, the track 13 of the present invention is a double-track groove structure, the track 13 is fixedly arranged on the inner wall 17 of the box body 1 through a mounting seat (not shown), the tractor 2 is slidably arranged on the track 13 through a universal wheel, and a traction rope (not shown) is tied to the tractor 2. The tractor 2 is located at the first bending portion 131 and at the initial position close to the entrance 11, and moves along the first track 1311 to the bending portion 132 by gravity. At the same time, by manually pulling the traction rope, the tractor 2 drives the fiber to move along the second track 1321 toward the direction of the outlet 12 close to the second bending portion 133. The track 13 of the present invention can also be a single groove structure, a double or single chain structure.

[0057] like Figures 3 to 5 As shown, the tractor 2 of the present invention comprises a first clamping portion 21 and a second clamping portion 22 , wherein a clamping space 23 is formed between the first clamping portion 21 and the second clamping portion 22 for clamping fibers.

[0058] The first clamping portion 21 and / or the second clamping portion 22 of the present invention has a spring structure for deformation restoration.

[0059] Considering the problem of tightening the fiber by the first clamping part 21 and the second clamping part 22, the first clamping part 21 and the second clamping part 22 have a certain elasticity to prevent the fiber from slipping from the clamping space 23 during movement. The first clamping part 21 and the second clamping part 22 are opened by artificial force, and the clamping space 23 is formed between the first clamping part 21 and the second clamping part 22. After the fiber enters the clamping space 23, the first clamping part 21 and the second clamping part 22 are released. Under the action of the force generated by the deformation recovery, the first clamping part 21 and the second clamping part 22 are attached to each other to clamp the fiber in the clamping space 23. Under the action of the driving part 19, the tractor 2 drives the fiber to move in the direction of the outlet 12. After the fiber moves to the specified position, the first clamping part 21 and the second clamping part 22 are opened again by artificial force, the fiber is taken out, and the next process is entered.

[0060] As an alternative to the above-mentioned first clamping portion 21 and the second clamping portion 22 having a certain elasticity, the first clamping portion 21 and the second clamping portion 22 can also be magnets that attract each other.

[0061] With a full understanding of the above intention of the present invention, professionals should understand that the first clamping part 21, the second clamping part 22 and the clamping space 23 generated can be completely replaced by other methods, such as only retaining the first clamping part 21, and manually winding the fiber around the first clamping part 21 when in use, or completely replacing the first clamping part 21, the second clamping part 22 and the clamping space 23 with a rough rod-like structure, and manually winding the fiber around the rough rod-like structure when in use. Both of the above alternatives can achieve the following purpose, that is, without destroying the temperature, pressure, composition and concentration of the spinning system, the fiber is transported from the inlet to the outlet, while avoiding direct contact between the operator and the internal environment of the spinning system, reducing risks and improving production efficiency.

[0062] In addition, since the connection device 16 is still a flexible connection, the above two alternatives can still achieve the following purpose, namely: adapt to tracks 13 of various widths, and one or more sets can be used simultaneously and installed in various structures of the spinning equipment.

[0063] like Figures 3 to 5 As shown, the traction device 2 of the present invention also includes a connecting portion 24, and both ends of the first clamping portion 21 and the second clamping portion 22 are connected to the connecting portion 24. The first clamping portion 21 and the second clamping portion 22 fit each other in the absence of external force, and under the action of external force, the first clamping portion 21 and / or the second clamping portion 22 moves in a direction away from the second clamping portion 22 and / or the first clamping portion 21, generating a clamping space 23.

[0064] like Figure 5 As shown, the first clamping part 21 and the second clamping part 22 of the present invention both include a multi-layer structure connected to each other, and each layer slides and retracts along the length direction from one end to the other end of the corresponding clamping part, so as to change the length of the tractor 2. The present invention is described by taking the first clamping part 21 and the second clamping part 22 as an example in which both of the layers are connected to each other.

[0065] Preferably, a first clamping portion layer 211 is telescopically arranged in the first clamping portion 21, and a second clamping portion layer 221 is telescopically arranged in the second clamping portion 22. The first clamping portion layer 211 and the second clamping portion layer 221 are arranged in the first clamping portion 21 and the second clamping portion 22 in a sleeve manner. Since both ends of the tractor 2 are arranged on the track 13 of a double-track groove structure in a soft connection manner, even if the widths of the tracks 13 are different, the length of the tractor 2 can be extended or shortened by sliding and telescoping the multi-layer structure to adapt to tracks 13 of various widths.

[0066] Working principle: During the spinning process, the spinning solution passes through the spinning assembly to produce strip-shaped fibers. The first clamping part 21 and the second clamping part 22 are manually opened through human action to make the fibers fall into the clamping space 23 generated by opening the first clamping part 21 and the second clamping part 22, and the force of opening the first clamping part 21 and the second clamping part 22 ends. Driven by the force generated by the first clamping part 21 and the second clamping part 22 to restore the deformation, the fibers are clamped and moved by the traction device 2 to transport the fibers to the outlet 12. The first clamping part 21 and the second clamping part 22 are manually opened again to make the fibers detach from the traction device 2 and come out of the outlet 12 to enter the next process.

[0067] The track-type wire drawing system of the present invention can be applied to various structures of the spinning equipment, including a coagulation bath, an extraction tank, a pretreatment tank, a drawing hot box, a shaping hot box, etc. The track-type wire drawing system can also be applied in one or more sets at the same time and installed in various structures of the spinning equipment.

[0068] A wire drawing method of the present invention comprises:

[0069] Connect the fiber to the tractor 2, which is located at the entrance 11 of the preset path of the track 13;

[0070] The traction fiber travels along a preset path of the track 13 from the entrance 11 to the exit 12;

[0071] The tractor 2 is at the exit 12 of the preset path of the track 13, and the fiber connected to the tractor 2 is released.

[0072] This wire drawing method can be used to transport the fiber from the entrance to the specified position without the operator directly contacting the internal environment of the box 1, while not destroying the internal temperature, pressure, composition and concentration of the box 1, thereby improving production efficiency and reducing manual operation risks.

[0073] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A track-type wire drawing system, characterized in that: The track-type wire drawing system is arranged in a box (1) of the spinning equipment, and the box (1) is provided with an inlet (11) and an outlet (12), and comprises: A track (13) is arranged in the box (1), and the track (13) is provided with a preset path; A tractor (2) is slidably disposed on the track (13) and is used to pull the fiber along a preset path of the track (13) from the inlet (11) toward the outlet (12); The driving part (19) is used to provide a force for the tractor (2) to slide along a preset path of the track (13).

2. The track-type wire drawing system according to claim 1, characterized in that: The track (13) comprises a first track (1311) and a second track (1321) connected to each other, wherein the connection between the first track (1311) and the second track (1321) is a bending portion (132), wherein the first track (1311) extends from the direction of the entrance (11) to the direction opposite to the entrance, and changes direction at the bending portion (132) to extend along the second track (1321) to the direction of the exit (12), and the bending portion (132) is arranged at the bottom of the box body (1).

3. The track-type wire drawing system according to claim 2, characterized in that: A wire drawing roller (14) is provided on the inner side of the bending portion (132) and close to the bending portion (132), and is used to guide the fiber to change direction from the extension direction of the first track (1311) to the extension direction of the second track (1321).

4. The track-type wire drawing system according to claim 3, characterized in that: The track (13) further comprises a third track (1331), both ends of which are respectively connected to one end of the first track (1311) at an entrance position and one end of the second track (1321) at an exit position, thereby forming a closed track structure.

5. The track-type wire drawing system according to claim 4, characterized in that: The track-type wire pulling system also includes a connecting device (16), one end of which is connected to the tractor (2) and the other end of which is flexibly connected to the track (13).

6. The track-type wire drawing system according to any one of claims 1 to 5, characterized in that: The tractor (2) comprises a first clamping portion (21) and a second clamping portion (22), wherein a clamping space (23) is formed between the first clamping portion (21) and the second clamping portion (22) for clamping fibers.

7. The track-type wire drawing system according to claim 6, characterized in that: The first clamping portion (21) and / or the second clamping portion (22) has a spring structure for deformation restoration.

8. The track-type wire drawing system according to claim 7, characterized in that: The tractor (2) further comprises a connecting portion (24), and both ends of the first clamping portion (21) and the second clamping portion (22) are connected to the connecting portion (24).

9. The track-type wire drawing system according to claim 8, characterized in that: The first clamping part (21) and the second clamping part (22) both comprise a multi-layer structure connected to each other, and each layer slides and retracts along the length direction from one end to the other end of the corresponding clamping part, so as to change the length of the tractor (2).

10. A wire drawing method of a track-type wire drawing system according to any one of claims 1 to 9, characterized in that: Connecting the fiber to the tractor (2), the tractor (2) being located at an entrance (11) of a preset path of the track (13); The traction fiber travels along a preset path of the track (13) from the entrance (11) to the exit (12); The tractor (2) is located at the exit (12) of the preset path of the track (13), and the fiber connected to the tractor (2) is released.

Citation Information

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