Micro-tension yarn winding device for fiber bundling

Abstract

A kind of micro-tension yarn winding device for fiber bundling, including assembly support, yarn group shaft, yarn group shaft driving part, yarn pot and yarn pot driving part, yarn pot and yarn pot driving part are both arranged on assembly support and are drivingly connected, yarn group shaft is coaxially arranged with yarn pot and its one end is located inside yarn pot, the other end is located outside yarn pot, yarn group shaft driving part is arranged on assembly support and is drivingly connected with the one end of yarn group shaft located outside yarn pot, the shaft body of yarn group shaft located inside yarn pot is provided with yarn group, and twisting die is sleeved at shaft end, first yarn passing hole and second yarn passing hole are respectively formed on the circumferential side wall of yarn pot, yarn group shaft is hollow shaft and its inside is provided with beam passing hole along its axial direction, and the center position of twisting die is coaxially provided with wire passing hole at the corresponding position of beam passing hole.The yarn spiral twisting and bundling equipment is optimized and improved in the application, so that the optical fiber yarn winding has smaller tension fluctuation range in micro-tension environment, thereby improving the production efficiency and product qualification rate of fiber bundling.

Description

Technical Field

[0001] This invention relates to the field of optical cable manufacturing equipment, and more specifically to a micro-tension yarn winding device for optical fiber bundling. Background Technology

[0002] Currently, fiber optic cable products are structurally classified into stranded and central tube types. To increase the fiber density of optical cables, increasing the number of fiber cores within a single tube is the preferred solution. According to relevant industry standards, optical fibers are color-coded with 12 colors. Once the number of fiber cores in a tube exceeds 12, the 12-color fibers need to be bundled together and identified using a single fiber code to prevent communication accidents caused by incorrect splicing during cable connection and maintenance. Currently, the main forms of fiber bundles include fiber ribbons, yarn-wound fiber bundles, and microtube fiber bundles. Fiber ribbon fiber bundles require an additional resin bonding process during cable production, involving filling and curing resin between the fibers. Microtube fiber bundles are formed by extruding thin-walled tubes onto the outside of the fiber bundle. Both of these forms require additional matching production equipment, resulting in complex manufacturing processes, higher costs, and an increased overall outer diameter of the fiber bundle. A yarn-wrapped fiber bundle involves wrapping a colored yarn around a fiber bundle at a certain pitch. The fibers are bundled together by the yarn, and the color of the wrapped yarn can be used as an identifier for the fiber bundle. This has become the preferred solution for reducing the cost of fiber bundled optical cable products.

[0003] Since optical fibers are typically crystalline silicides protected by an outer resin coating, lateral pressure and bending can easily weaken their light transmission capacity or even cause breakage. Therefore, when directly bundling yarns onto an optical fiber bundle, the yarn tension must be very low and with minimal tension fluctuations. Furthermore, during subsequent plastic coating processing, the yarns on the optical fiber bundle must not accumulate. However, the existing high-speed spiral stranding bundling method for winding optical fiber bundles suffers from unstable tension control. Relying on the resistance of the yarn bobbin itself for tension control results in significant tension variations between full and shallow coils. When the tension is too high, it can easily damage the product, leading to a low yield rate. When the tension is too low, the optical fiber bundle becomes loose, affecting subsequent production processes and resulting in significant product quality risks. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a micro-tension yarn winding device for optical fiber bundling, which optimizes and improves the yarn spiral twisting and bundling equipment so that the optical fiber winding has a small tension fluctuation range under micro-tension environment, thereby improving the production efficiency and product qualification rate of optical fiber bundling.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A micro-tension yarn winding device for optical fiber bundling includes an assembly support, a yarn bundle shaft, a yarn bundle shaft driving component, a yarn pot, and a yarn pot driving component. The yarn pot and the yarn pot driving component are both mounted on the assembly support and are drivenly connected. The yarn bundle shaft is coaxially arranged with the yarn pot, one end of which is located inside the yarn pot, and the other end is located outside the yarn pot. The yarn bundle shaft driving component is mounted on the assembly support and drivenly connected to the end of the yarn bundle shaft located outside the yarn pot. A yarn bundle is mounted on the shaft body inside the yarn pot, and a stranding mold is sleeved at the shaft end. A first yarn passage hole and a second yarn passage hole are respectively opened on the circumferential sidewall of the yarn pot. The yarn bundle shaft is a hollow shaft, and its interior has a bundle passage hole along its axial direction for the optical fiber bundle to pass through. A wire passage hole is coaxially opened at the center position of the stranding mold at a position corresponding to the bundle passage hole.

[0007] The fiber bundle moves through the wire hole and the bundle hole. The yarn is led out from the yarn ball and passes through the first yarn hole to the outside of the yarn pot. Then it goes along the outer wall of the yarn pot to the second yarn hole and passes through the inside of the yarn pot. It is then bundled onto the fiber bundle at the twisting mold. The yarn ball shaft driving component and the yarn pot driving component drive the yarn ball shaft and the yarn pot to rotate in the same direction or in opposite directions so that the yarn is wrapped around the fiber bundle.

[0008] Alternatively, the fiber bundle moves through the wire hole and the bundle hole, the yarn is drawn out from the yarn ball and attached to the surface of the stranding mold and then tied to the fiber bundle, and the yarn ball shaft driving component drives the yarn ball shaft to rotate so that the yarn is wrapped around the fiber bundle.

[0009] Preferably, the aperture of the wire guide hole is the sum of the diameter of the fiber bundle envelope circle and 1.5 to 3 times the yarn diameter. The outer circumferential surface, end face of the stranding mold and the inner sidewall of the wire guide hole are all connected by a circular arc transition to form a circular arc surface. The roughness of the circular arc surface is 0.8 to 1.6 μm.

[0010] Preferably, when the yarn is drawn from the yarn bundle and attached to the surface of the twisting mold before being bundled onto the optical fiber bundle, a limiting mold is coaxially sleeved on the shaft between the yarn bundle and the twisting mold. The limiting mold is annular and its inner diameter is larger than the outer diameter of the twisting mold. A connecting rod is provided on the outer circumference of the limiting mold and is fixedly connected to the inner wall of the yarn pot. The yarn is drawn from the yarn bundle and attached to the inner side of the limiting mold and the arc surface on the twisting mold before being bundled onto the optical fiber bundle.

[0011] Preferably, the inner diameter of the limiting mold is the sum of the outer diameter of the twisting mold and 2 to 10 times the yarn diameter, and the inner surface of the limiting mold is an arc surface with a roughness of 0.8 to 1.6 μm.

[0012] Preferably, when the yarn is drawn from the yarn bundle and attached to the surface of the stranding mold and then bundled onto the optical fiber bundle, the inside of the yarn pot is also provided with a brush. The brush acts at least on the portion of the yarn located between the yarn bundle and the surface of the stranding mold, so as to force the yarn to remain attached to the surface of the stranding mold.

[0013] Preferably, the brush component includes bristles and a handle. The handle is made of engineering plastic and is fixedly connected to the inner wall of the yarn pot by screws. Multiple bristles are evenly arranged on the handle. The bristles are made of nylon or polypropylene. The diameter of the single filament of the bristles is 0.1 to 0.5 mm. The length of the bristles is the inner diameter of the yarn pot.

[0014] Preferably, the brush handle is a strip-shaped brush handle, and at least one strip-shaped brush handle is evenly provided along the circumference of the inner side of the yarn pot. The thickness of the strip-shaped brush handle is 8-12 mm, the width is 15-30 mm, and the length is the same as the inner axis length of the yarn pot. The multiple brush bristles are evenly applied to the yarn located on the yarn ball, between the yarn ball and the surface of the twisting mold, and on the surface of the twisting mold.

[0015] Preferably, the brush handle is an annular brush handle, the outer circumference of which is equal to the inner circumference of the yarn pot, the thickness of which is 8-12 mm, the shaft length of which is 30-60 mm, and the multiple brushes are applied evenly to the portion of the yarn located between the yarn ball and the surface of the twisting mold, as well as on the surface of the twisting mold.

[0016] Preferably, the yarn shaft has a tapered shaft with a taper of 10° to 15°.

[0017] Preferably, the yarn pot is mounted on the assembly bracket via a yarn pot bracket. The yarn pot driving component includes a yarn pot servo motor, a first synchronous belt, and a first motor bracket. The yarn pot servo motor is mounted on the assembly bracket via the first motor bracket, and its output end is connected to the yarn pot drive via the first synchronous belt. The yarn bobbin driving component includes a yarn bobbin servo motor, a second synchronous belt, and a second motor bracket. The yarn bobbin servo motor is mounted on the assembly bracket via the second motor bracket, and its output end is connected to the end of the yarn bobbin located outside the yarn pot via the second synchronous belt.

[0018] Compared with existing technologies, the micro-tension yarn winding device for optical fiber bundling provided by this invention is compact in shape, convenient to install, adjust and operate. The tension of the yarn bundle can be controlled by different yarn tension modes according to actual needs to achieve the purpose of micro-tension yarn winding of the optical fiber bundle. At the same time, this yarn winding device can be extended to various wire bundle bundling environments with minimal modifications. Moreover, due to the characteristics of servo high-speed response and high rotation speed, it can improve bundling efficiency while maintaining stable product quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of a micro-tension yarn winding device for optical fiber bundling provided by the present invention;

[0021] Figure 2 This is a front view of a micro-tension yarn winding device for optical fiber bundling provided by the present invention;

[0022] Figure 3 This is a cross-sectional view of Embodiment 1;

[0023] Figure 4 This is a cross-sectional view of Example 2;

[0024] Figure 5 This is a cross-sectional view of the twisting die;

[0025] Figure 6 This is a schematic diagram of the combination of the limiting mold and the twisting mold in Example 3;

[0026] Figure 7 This is a cross-sectional view of the limiting mold;

[0027] Figure 8 This is a cross-sectional view of Example 4;

[0028] Figure 9 This is a schematic diagram of the brush component in Example 4;

[0029] Figure 10 This is a cross-sectional view of Example 5;

[0030] Figure 11 This is a schematic diagram of the brush component in Example 5.

[0031] Explanation of reference numerals and components in the accompanying drawings:

[0032] 1. Assembly bracket; 2. Yarn spool shaft; 3. Yarn pot; 4. Yarn pot servo motor; 5. First synchronous belt; 6. First motor bracket; 7. Yarn spool shaft servo motor; 8. Second synchronous belt; 9. Second motor bracket; 10. Yarn spool; 11. Twisting mold; 12. Fiber optic bundle; 13. Bundle hole; 14. Wire hole; 15. Yarn; 16. First yarn hole; 17. Second yarn hole; 18. Arc surface; 19. Limiting mold; 20. Arc surface; 21. Connecting rod; 22. Brush bristles; 23. Strip brush handle; 24. Ring brush handle; 25. Yarn pot bracket. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described through specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Existing yarn winding devices, in practical use, often lead to yarn breakage due to the combined effects of mechanical inertia of rotating parts, bearing resistance of rotating shafts, the pagoda shape of the yarn bundle, and resistance along the yarn path, thus failing to guarantee the quality of the wound optical fiber bundle. To solve the yarn breakage problem, while ensuring that the winding pitch meets design requirements, the tension of the yarn wound onto the optical fiber bundle must be minimized. This ensures that the optical fiber bundle does not loosen and that the optical fiber is not subjected to lateral pressure from the yarn, which would increase optical transmission loss. In view of this, the present invention provides a micro-tension yarn winding device for optical fiber bundling.

[0035] See Figures 1-2 As shown, a micro-tension yarn winding device for optical fiber bundling can be installed as part of an optical fiber ribbon production line and an optical fiber secondary coating production line. It is used to wind polyester fiber yarn (such as sewing yarn) that meets the standard color requirements on the optical fiber bundle. It includes an assembly bracket 1, a yarn bundle shaft 2, a yarn bundle shaft driving component, a yarn pot 3, and a yarn pot driving component. The assembly bracket 1 is designed as a waist-shaped perforated plate to meet the installation requirements of the production line modification, without the need for additional floor-mounted brackets, thus saving installation space.

[0036] Both the yarn pot 3 and the yarn pot drive component are mounted on the assembly bracket 1 and are connected by a drive. Specifically, the yarn pot 3 is mounted on the assembly bracket 1 via a yarn pot bracket 25. The yarn pot drive component includes a yarn pot servo motor 4, a first synchronous belt 5, and a first motor bracket 6. The yarn pot servo motor 4 is mounted on the assembly bracket 1 via the first motor bracket 6, and its output end is connected to the yarn pot 3 via the first synchronous belt 5. The yarn bobbin 2 is coaxially mounted with the yarn pot 3, with one end located inside the yarn pot 3 and the other end located outside the yarn pot 3. The yarn bobbin 2 drive component is mounted on the assembly bracket 1 and is connected to the end of the yarn bobbin 2 located outside the yarn pot 3. Specifically, the yarn bobbin 2 drive component includes a yarn bobbin servo motor 7, a second synchronous belt 8, and a second motor bracket 9. The yarn bobbin servo motor 7 is mounted on the assembly bracket 1 via the second motor bracket 9, and its output end is connected to the end of the yarn bobbin 2 located outside the yarn pot 3 via the second synchronous belt 8. The above-mentioned yarn pot drive component and yarn bobbin 2 drive component can be adjusted and installed according to actual production needs.

[0037] The yarn bundle shaft 2 is located inside the yarn pot 3. A yarn bundle 10 is mounted on the shaft body, and a twisting mold 11 is fitted at the shaft end. The yarn bundle shaft 10 is a hollow shaft with a pass-through hole 13 along its axial direction for the optical fiber bundle 12 to pass through. The shaft body at the location where the yarn bundle 10 is installed is tapered, with a taper of 10° to 15°, ideally 10°, to ensure the stability of the yarn bundle 10. The axis of the yarn bundle 10 is coaxial with the optical fiber bundle 12. Compared to the existing yarn winding method where the yarn bundle 10 rotates around the optical fiber bundle 12 in a planetary manner, this device is more compact and easier to control.

[0038] A wire-passing hole 14 is coaxially formed at the center of the stranding mold 11, corresponding to the pass-through hole 13. The diameter of the wire-passing hole 14 is the sum of the envelope diameter of the fiber bundle 12 and 1.5 to 3 times the diameter of the yarn 15. It can be adjusted according to the actual number of optical fibers in the fiber bundle 12 so that the fiber bundle 12 and the yarn 15 on the fiber bundle 12 can pass through. In addition, a first yarn-passing hole 16 and a second yarn-passing hole 17 are respectively formed on the circumferential side wall of the yarn pot 3.

[0039] Example 1

[0040] See Figure 3 As shown, the fiber bundle 12 moves through the wire hole 14 and the bundle hole 13, with the direction of movement as shown in the figure. The yarn 15 is led out from the yarn ball 10 and passes through the first yarn hole 16 to the outside of the yarn pot 3, then along the outer wall of the yarn pot 3 to the second yarn hole 17 and into the inside of the yarn pot 3, where it is bundled onto the fiber bundle 12 at the twisting mold 11. In this embodiment, the function of the yarn pot 3 is to rotate the yarn 15; therefore, the positions of the first yarn hole 16 and the second yarn hole 17 can be adjusted according to actual conditions, and no specific requirements are made. Of course, it is better if the line connecting the centers of the two coincides with the axis of the yarn pot 3.

[0041] The yarn ball 10 and the yarn pot 3 can rotate coaxially in the same or opposite directions depending on the actual situation, wrapping the yarn 15 around the surface of the optical fiber bundle 12. In this embodiment, the yarn ball 10 and the yarn pot 3 rotate in the same direction and on the same axis. The yarn ball axis servo motor 7 drives the yarn ball axis 2 through the second synchronous belt 8 to control the direction and speed of the yarn ball 10 and the yarn 15. The yarn pot servo motor 4 drives the yarn pot 3 to rotate through the first synchronous belt 5 and controls the direction of the yarn pot 3. This device is controlled by a programmable controller to control the yarn pot servo motor 4 and the yarn ball axis servo motor 7, and can control and adjust the speed of the yarn pot servo motor 4 and the yarn ball axis servo motor 7 in real time according to the detected torque difference, so as to control the tension of the yarn 15 and the wrapping pitch of the yarn 15 on the optical fiber bundle 12. Under the condition that the speed of the fiber bundle 12 remains constant, the higher the speed at which the yarn ball 10 and the yarn pot 3 rotate in the same direction, the smaller the pitch of the yarn 15 wrapped around the fiber bundle 12. Similarly, the closer the speeds at which the yarn ball 10 and the yarn pot 3 rotate in the same direction, the smaller the tension of the yarn 15 wrapped around the fiber bundle 12.

[0042] Example 2

[0043] See Figures 4-5 As shown, the fiber bundle 12 moves through the wire hole 14 and the bundle hole 13, with the direction of movement as shown in the figure. The yarn 15 is drawn from the yarn ball 10 and directly pulled to the surface of the stranding mold 11, then adheres to the surface of the stranding mold 11 and is bundled onto the fiber bundle 12. When the yarn 15 passes through the stranding mold 11, friction acts on the yarn 15, and correspondingly, the yarn 15 has a certain tension when wrapped around the fiber bundle 12, which can constrain the fiber bundle 12. Simultaneously, the outer circumferential surface, end face, and inner wall of the wire hole 14 of the stranding mold 11 are all connected by arc transitions to form an arc surface 18, allowing the yarn 15 to both adhere to the surface of the stranding mold 11 and continuously be subjected to friction. The roughness of the arc surface 18 is 0.8–1.6 μm. The yarn bobbin servo motor 7 drives the yarn bobbin shaft 2 via the second synchronous belt 8 to control the direction and speed of the yarn bobbin 10 and the yarn 15, so that the yarn 15 is wrapped around the optical fiber bundle 12. At this time, the yarn pot 3 can effectively prevent the yarn 15 from being disturbed by external factors. The yarn pot 3 can be selected to rotate synchronously or not rotate, which is not required here.

[0044] Example 3

[0045] This embodiment adds a limiting mold 19 to the second embodiment. See also Figures 6-7As shown, a limiting mold 19 is coaxially sleeved on the shaft 2 located between the yarn bundle 10 and the stranding mold 11. The limiting mold 19 is annular in shape, and its inner diameter is larger than the outer diameter of the stranding mold 11. The inner surface of the limiting mold 19 is an arc surface 20 with a roughness of 0.8 to 1.6 μm. A connecting rod 21 is provided on the outer circumference of the limiting mold 19 and is fixedly connected to the inner wall of the yarn pot 3. The yarn 15 is led out from the yarn bundle 10 and attached to the inner surface of the limiting mold 19 and the arc surface 18 on the stranding mold 11 before being bundled onto the optical fiber bundle 12. The limiting mold 19 is provided to prevent the yarn 15 from being thrown out under the centrifugal force of rotation, thereby reducing the friction between the yarn 15 and the stranding mold 11.

[0046] In this embodiment, the inner diameter of the limiting mold 19 is the sum of the outer diameter of the stranding mold 11 and 2 to 10 times the diameter of the yarn 15. The outer diameter and thickness are appropriate, and it is advisable that there is no conflict with the yarn bundle 10 after installation. The structure adopted in this embodiment significantly improves the friction and stability between the yarn 15 and the stranding mold 11, thereby ensuring the winding quality of the optical fiber bundle 12 and making the optical fibers more tightly packed.

[0047] Example 4

[0048] This embodiment adds a brush component to the second embodiment. See [link / reference] Figures 8-9 As shown, the yarn pot 3 is equipped with a brush, which acts at least on the portion of the yarn 15 located between the yarn bundle 10 and the surface of the stranding mold 11, forcing the yarn 15 to remain attached to the surface of the stranding mold 11. The yarn 15 is drawn from the yarn bundle 10, passes through the brush, and is then pulled and attached to the arcuate surface 18 of the stranding mold 11 before being bundled to the optical fiber bundle 12. The brush restricts the movement of the yarn 15 on the yarn bundle 10 and the stranding mold 11, resulting in greater and more stable friction on the surface of the stranding mold 11, thereby meeting the quality requirements for the yarn 15 winding around the optical fiber bundle 12.

[0049] The brush assembly includes bristles 22 and a handle. The handle is made of engineering plastic and is fixedly connected to the inner wall of the yarn pot 3 by screws. Multiple bristles 22 are evenly arranged on the handle. The bristles 22 are made of nylon or polypropylene, with a single filament diameter of 0.1–0.5 mm and a length equal to the inner diameter of the yarn pot 3. After installation, the bristles 22 should ideally press against the surface of the yarn bundle 10 and the surface of the twisting mold 11. In this embodiment, a strip-shaped handle 23 is used. At least one strip-shaped handle 23 is evenly arranged along the circumference of the inner side of the yarn pot 3. The specific number of strip-shaped handles installed depends on the designed tension of the yarn 15. The more strip-shaped handles installed, the greater the tension of the yarn 15. The number of strip-shaped handles 23 can be one, two symmetrically arranged, or three to six evenly distributed along the circumference of the inner wall of the yarn pot 3.

[0050] The thickness of the strip brush handle 23 is 8-12mm, the width is 15-30mm, and the length is the same as the inner shaft length of the yarn pot 3. Multiple brush bristles 22 are evenly applied to the yarn 15 located on the yarn ball 10, between the yarn ball 10 and the surface of the twisting mold 11, and on the surface of the twisting mold 11.

[0051] Example 5

[0052] See Figures 10-11 As shown, this embodiment differs from Embodiment 4 in that the brush handle is an annular brush handle 24, while the rest of the structure is the same. The outer circumference of the annular brush handle 24 is equal to the inner circumference of the yarn pot 3. The thickness of the annular brush handle 22 is 8-12 mm, and the shaft length is 30-60 mm. Multiple brushes 22 are applied evenly to the yarn 15 located between the yarn ball 10 and the surface of the twisting mold 11, as well as on the surface of the twisting mold 11. If it is necessary to increase the tension of the yarn 15, one or two additional brushes can be added at the positions corresponding to the yarn ball 10, so that multiple brushes 22 are applied evenly to the yarn 15 located on the yarn ball 10, between the yarn ball 10 and the surface of the twisting mold 11, and on the surface of the twisting mold 11.

[0053] When using the micro-tension yarn winding device for optical fiber bundling provided by this invention, the tension of the yarn winding the optical fiber bundle can be adjusted according to actual needs, and can reach zero tension. The attenuation index of the 12-core optical fiber bundle produced in the trial is qualified. The yarn pitch is stable and there is no yarn accumulation phenomenon when the optical fiber bundle is produced by plastic coating.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A micro-tension yarn winding device for optical fiber bundling, characterized in that: The assembly includes an assembly bracket, a yarn spool shaft, a yarn spool shaft drive component, a yarn pot, and a yarn pot drive component. The yarn pot and the yarn pot drive component are both mounted on the assembly bracket and are driven together. The yarn spool shaft is coaxially arranged with one end inside the yarn pot and the other end outside. The yarn spool shaft drive component is mounted on the assembly bracket and driven together with the external end of the yarn spool shaft. A yarn spool is mounted on the shaft inside the yarn pot, and a stranding mold is fitted at the shaft end. A first yarn passage hole and a second yarn passage hole are respectively opened on the circumferential sidewall of the yarn pot. The yarn spool shaft is a hollow shaft with a fiber optic cable passage hole along its axial direction inside. A wire passage hole is coaxially opened at the center of the stranding mold at a position corresponding to the fiber optic cable passage hole. The fiber bundle moves through the wire hole and the bundle hole. The yarn is led out from the yarn ball and passes through the first yarn hole to the outside of the yarn pot. Then it goes along the outer wall of the yarn pot to the second yarn hole and passes through the inside of the yarn pot. It is then bundled onto the fiber bundle at the twisting mold. The yarn ball shaft driving component and the yarn pot driving component drive the yarn ball shaft and the yarn pot to rotate in the same direction or in opposite directions so that the yarn is wrapped around the fiber bundle. Alternatively, the fiber bundle moves through the wire hole and the bundle hole, the yarn is drawn out from the yarn ball and attached to the surface of the stranding mold and then tied to the fiber bundle, and the yarn ball shaft driving component drives the yarn ball shaft to rotate so that the yarn is wrapped around the fiber bundle. The diameter of the wire passage hole is the sum of the diameter of the fiber bundle envelope circle and 1.5 to 3 times the yarn diameter. The outer circumferential surface, end face of the stranding mold and the inner sidewall of the wire passage hole are all connected by a circular arc to form a circular arc surface. The roughness of the circular arc surface is 0.8 to 1.6 μm. When the yarn is drawn out from the yarn ball and attached to the surface of the stranding mold and bundled onto the optical fiber bundle, a brush is also provided inside the yarn pot. The brush acts at least on the portion of the yarn located between the yarn ball and the surface of the stranding mold to force the yarn to remain attached to the surface of the stranding mold. The brush component includes bristles and a handle. The handle is made of engineering plastic and is fixedly connected to the inner wall of the yarn pot by screws. Multiple bristles are evenly arranged on the handle. The bristles are made of nylon or polypropylene. The diameter of the single filament of the bristles is 0.1~0.5mm. The length of the bristles is the inner diameter of the yarn pot. The brush handle is a strip-shaped brush handle. At least one strip-shaped brush handle is evenly provided along the circumference of the inner side of the yarn pot. The thickness of the strip-shaped brush handle is 8~12mm, the width is 15~30mm, and the length is the same as the inner axis length of the yarn pot. Multiple brush bristles are evenly applied to the yarn located on the yarn ball, between the yarn ball and the surface of the twisting mold, and on the surface of the twisting mold. When the yarn is drawn from the yarn ball and attached to the surface of the stranding mold before being bundled onto the optical fiber bundle, a limiting mold is coaxially sleeved on the shaft between the yarn ball and the stranding mold. The limiting mold is annular and its inner diameter is larger than the outer diameter of the stranding mold. A connecting rod is provided on the outer circumference of the limiting mold and is fixedly connected to the inner wall of the yarn pot. The yarn is drawn from the yarn ball and attached to the inner side of the limiting mold and the arc surface on the stranding mold before being bundled onto the optical fiber bundle.

2. The micro-tension yarn winding device for optical fiber bundling according to claim 1, characterized in that: The inner diameter of the limiting mold is the sum of the outer diameter of the twisting mold and 2 to 10 times the yarn diameter, and the inner surface of the limiting mold is an arc surface with a roughness of 0.8 to 1.6 μm.

3. The micro-tension yarn winding device for optical fiber bundling according to claim 1, characterized in that: The brush handle is an annular brush handle, the outer circumference of which is equal to the inner circumference of the yarn pot, the thickness of which is 8-12mm, and the shaft length is 30-60mm. Multiple brushes are applied evenly to the yarn located between the yarn ball and the surface of the twisting mold, as well as to a portion of the yarn on the surface of the twisting mold.

4. The micro-tension yarn winding device for optical fiber bundling according to claim 1, characterized in that: The yarn shaft is a conical body with a taper of 10° to 15°.

5. The micro-tension yarn winding device for optical fiber bundling according to claim 1, characterized in that: The yarn pot is mounted on the assembly bracket via a yarn pot bracket. The yarn pot driving component includes a yarn pot servo motor, a first synchronous belt, and a first motor bracket. The yarn pot servo motor is mounted on the assembly bracket via the first motor bracket, and its output end is connected to the yarn pot drive via the first synchronous belt. The yarn bobbin drive component includes a yarn bobbin servo motor, a second synchronous belt, and a second motor bracket. The yarn bobbin servo motor is mounted on the assembly bracket via the second motor bracket, and its output end is connected to the end of the yarn bobbin located outside the yarn pot via the second synchronous belt.

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