Multistage constant-tension winding group for refill cellosilk

Abstract

The invention relates to the technical field of fiber processing, and discloses a cartridge cellosilk multistage constant tension winding which comprises a base plate and a winding drum installed on the base plate and further comprises a secondary tension control part. The tensioner is installed at the output end of the reciprocating component, the tensioner comprises two rotatable inner wheels, the two inner wheels guide fibers, the fibers are in an S shape, the two inner wheels rotate along with movement of the fibers, and stress plates are installed on the outer sides of the two inner wheels; and the pneumatic part is mounted on the outer side of the tensioner and is used for generating airflow to the stress plate and forming resistance to movement of the two inner wheels, so that tension adjustment of the fiber yarns is realized. Dynamic tension stable control is achieved, tension fluctuation caused by external disturbance is counteracted through real-time matching of pneumatic resistance and fiber yarn speed, it is guaranteed that constant tension is always kept in the winding process of fiber yarns, and winding uniformity and finished product quality are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber processing, and specifically to a multi-stage constant-tension winding group for pen core fiber filaments. Background Art

[0002] In the field of fiber pen core manufacturing, the fiber filament winding process is a core technological link that determines the writing performance and product qualification rate of the pen core. During the doubling and setting processes, multiple strands of chemical fiber filaments need to be doubled first. Through mechanical means, multiple strands of fibers are combined into a yarn bundle of a unified specification, and the combined fibers are wound into a yarn cake to maintain uniform tension. The combined fiber bundle needs to be set in a high-temperature environment to eliminate internal stress and fix the fiber arrangement structure. The set fibers are usually wound into a larger-sized coil. In the prior art, the winding process of pen core fiber filaments has not formed an independent process, but is dispersed in links such as doubling and drying. The core challenges lie in the tension control accuracy and fiber protection. Existing winding technologies generally have defects such as insufficient tension control accuracy and uneven interlayer stress distribution.

[0003] Traditional mechanical tension control requires manual adjustment of the tension value and cannot be dynamically adjusted according to process requirements. For example, when the diameter of the fiber filament cake changes or the winding speed fluctuates, it is difficult to maintain a stable tension value.

[0004] There is also a problem of slow response speed. The mechanical structure has a large inertia and cannot quickly respond to tension fluctuations. For example, during high-speed winding, it is easy to cause yarn breakage or sudden tension changes due to reaction delay.

[0005] During the conduction of fiber filaments, the problem of mechanical friction is prominent. Components such as yarn guides and combs rub violently against the fiber filaments, resulting in fuzzing or breakage on the surface of the fiber filaments. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-stage constant-tension winding group for pen core fiber filaments to solve the problems raised in the above background art.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A multi-stage constant-tension winding group for pen core fiber filaments includes a substrate and a winding drum installed on the substrate, and further includes a secondary tension control unit. The secondary tension control unit includes:

[0008] A reciprocating member;

[0009] A tensiometer installed at the output end of the reciprocating member. The tensiometer includes two rotatable inner wheels that guide the fiber filaments. The fiber filaments are in an "S" shape, and the two inner wheels rotate as the fiber filaments move. Force-receiving plates are installed on the outer sides of the two inner wheels;

[0010] The pneumatic part is installed outside the tensiometer and is used to generate air flow on the stress plate, form resistance to the movement of the two inner wheels, and realize the regulation of the fiber filament tension.

[0011] Furthermore, the reciprocating part includes a frame installed on the substrate and a cylinder installed outside the frame. The outside of the cylinder has an output shaft that realizes telescoping, and the output shaft is connected to the tensiometer.

[0012] Furthermore, the tensiometer further includes a box body and a cover body that cooperates with the box body. The outside of the box body is fixed to the output shaft, and the two inner wheels are both rotatably installed in the box body;

[0013] Both the upper and lower sides of the box body are provided with connection grooves for the fiber filament to enter and exit. The outside of the cover body has two circular holes, and the stress plate extends outward from the circular holes.

[0014] Furthermore, the pneumatic part includes a pneumatic box and a pneumatic motor fixed to the outside of the pneumatic box. The pneumatic box is fixed to the outside of the cover body, and an impeller is installed inside it. The impeller is connected to the output end of the pneumatic motor. The horizontal extension line of the air outlet end of the pneumatic box coincides with the symmetry line of the two inner wheels, so that the stress plates on the two inner wheels are subjected to resistance.

[0015] Furthermore, the stress plate is a metal thin sheet, and multiple stress plates are circumferentially distributed along the axis of the inner wheel.

[0016] Furthermore, an air inlet is provided on the outside of the pneumatic box, and the diameter of the pneumatic box gradually decreases in the air outlet direction.

[0017] Furthermore, the box body has a double-chamber, and its axial cross-section is an "8"-shaped closed curve structure. The outer diameter of the inner wheel is smaller than the inner diameter of the corresponding chamber of the box body;

[0018] An air inlet groove is integrally formed on the outside of the cover body. The extension line of the bottom of the air inlet groove forms an angle with the air outlet of the pneumatic part, and is used to guide the air flow generated by the pneumatic part to the inside of the box body to form an air flow scouring network covering the entire circumference inside the box body.

[0019] Furthermore, the secondary tension control part further includes a support shaft one fixed to the substrate and a signal processing module. A guide wheel one for transmitting the fiber filament is rotatably sleeved on the support shaft one. A circle of pressure sensors is arranged inside the guide wheel one. The input end of the signal processing module is electrically connected to the pressure sensors, and the output end forms a closed-loop feedback circuit with the control end of the pneumatic motor.

[0020] Furthermore, when the detection value of the pressure sensor exceeds the preset threshold, the rotation speed of the pneumatic motor is reduced by 20%-30% to control the fiber filament tension.

[0021] Further, the device further includes a primary tension control unit. The primary tension control unit includes a second support shaft fixed to the substrate, and a second guide wheel for transmitting the fiber filament is rotatably sleeved on the second support shaft.

[0022] The first guide wheel and the second guide wheel are respectively located on both sides of the tensiometer. Support rings with grooves are fixed on the outer sides of the first guide wheel and the second guide wheel. A guiding frame is fixed on the output shaft. The guiding frame has multiple ends, and clamping wheels are fixed at the ends thereof and are clamped in the grooves of the support rings to control the movement of the first guide wheel and the second guide wheel along with the tensiometer.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0024] 1. Achieve dynamic tension stable control. By the real-time matching of pneumatic resistance and the speed of the fiber filament, the tension fluctuations caused by external disturbances are offset, ensuring that the fiber filament always maintains a constant tension during the winding process, and significantly improving the winding uniformity and the quality of the finished product.

[0025] 2. Even if the tension state changes to a certain extent, the pneumatic resistance adjustment method makes the resistance in a flexible state and will not cause the fiber filament to break or become loose instantaneously.

[0026] 3. Adopt non-contact resistance adjustment. Wind power replaces traditional mechanical friction components, and the resistance control without physical contact is realized by adjusting the wind pressure or air flow velocity. This not only avoids the wear problem but also extends the service life of the equipment, and at the same time supports the fine-tuning requirements of high-precision and high-response scenarios.

[0027] 4. The pressure sensor on the first guide wheel is linked with the pneumatic motor to form a closed-loop control. The tension change is immediately fed back to the pneumatic system to dynamically adjust the wind resistance and achieve tension self-balancing. This mechanism has a sensitive response and a low error tolerance, ensuring the continuity of production.

[0028] 5. The air flow generated by the pneumatic part forms a directional flow through the inner wheel gap, effectively stripping the dust, broken wire burrs and residual coatings on the surface of the fiber filament, reducing subsequent process defects and improving the consistency of material properties.

[0029] 6. The design without vulnerable friction components reduces the frequency of shutdown maintenance. Combined with the automatic adjustment mechanism, it reduces the need for manual intervention and comprehensively improves the production efficiency and economic benefits. Description of the Drawings

[0030] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0031] Figure 1 is the overall structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the reciprocating component separation structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the fiber filament transmission plane structure of the present invention;

[0034] Figure 4 It is a schematic diagram of the installation position structure of the tensioner and the pneumatic part of the present invention;

[0035] Figure 5 It is a schematic diagram of the exploded structure of the tensioner of the present invention;

[0036] Figure 6 It is a schematic diagram of the installation position structure of the guide frame of the present invention;

[0037] Figure 7 It is the present invention Figure 6 The partial enlarged structure schematic diagram of A in;

[0038] Figure 8 It is a schematic diagram of the top view of the tensioner, the first guide wheel and the second guide wheel of the present invention;

[0039] Figure 9 It is a schematic diagram of the position structure of the inner wheel located in the box body and the cover body of the present invention;

[0040] Figure 10 It is a schematic diagram of the plane structure in which two inner wheels conduct fiber filaments of the present invention.

[0041] In the figure: 1. Substrate; 2. Winding drum; 3. Secondary tension control part; 31. Frame; 32. Cylinder; 33. Tensioner; 331. Output shaft; 332. Box body; 333. Connection groove; 334. Inner wheel; 335. Force-bearing plate; 336. Cover body; 337. Air inlet groove; 34. First support shaft; 35. First guide wheel; 351. Pressure sensor; 352. Support layer; 353. Pinch wheel; 36. Pneumatic part; 361. Pneumatic box; 362. Pneumatic motor; 4. Primary tension control part; 41. Second support shaft; 42. Second guide wheel; 5. Guide frame. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Please refer to Figures 1-10, the present invention provides a technical solution: During the processing of pen core fiber filaments, usually 2-4 rewinding operations are required, specifically depending on the process design and quality requirements. Multiple rewinding operations help to ensure fiber properties such as strength and uniformity, and improve the yield rate. In the current existing fiber filament tension control, traditional mechanical tension control is often used, and the tension cannot always be kept stable. When the diameter of the fiber filament coil changes or the winding speed fluctuates, it is difficult to keep the tension value stable. For this reason, a multi-stage constant tension winding group for pen core fiber filaments is proposed, as Figures 1-3 shown, which includes a substrate 1 and a winding drum 2 installed on the substrate 1. The substrate 1 is integrally formed of a high-strength metal alloy, and its surface has multiple groups of positioning and installation holes for rigid fixation of each functional module. The winding drum 2 winds the fiber filaments into a shape. The winding drum 2 has a winding unit inside. The winding unit is controlled by a motor to rotate and is known in the prior art. It is usually made of metal, and the limiting wire is wound around it. It also includes a secondary tension control unit 3. The secondary tension control unit 3 includes: a reciprocating member, a tensioner 33, and a pneumatic unit 36. The secondary tension control unit 3 is used to support the fiber filaments and stabilize the tension while transmitting the fiber filaments. Among them, the reciprocating member is used to control the reciprocating movement of the fiber filaments to achieve uniform winding. The tensioner 33 and the pneumatic unit 36 control the resistance of the fiber filament transmission. When the fiber filaments are wound, they are kept at a constant tension;

[0044] As Figure 10 shown, the tensioner 33 is installed at the output end of the reciprocating member. The tensioner 33 includes two rotatable inner wheels 334. The two inner wheels 334 guide the fiber filaments. The fiber filaments are in an "S" shape, and the two inner wheels 334 rotate with the movement of the fiber filaments. Force-receiving plates 335 are installed on the outer sides of the two inner wheels 334;

[0045] The pneumatic unit 36 is installed outside the tensioner 33 and is used to generate air flow on the force-receiving plates 335 to form resistance to the movement of the two inner wheels 334, thereby realizing the adjustment of the fiber filament tension.

[0046] Specifically, the tensioner 33 includes two inner wheels 334. The fiber filaments are wrapped through the two inner wheels 334 and present an "S" shape. Under the pulling force of the fiber filaments, the two inner wheels 334 are driven to rotate. The force-receiving plates 335 on the outer sides of the two inner wheels 334 are driven by the gas of the pneumatic unit 36. There is a certain resistance during the rotation of the two inner wheels 334, and the resistance changes with the size of the air flow of the pneumatic unit 36. Compared with the existing mechanical tension control, the accuracy is higher, realizing flexible tension control and avoiding the breakage of the fiber filaments. It should be noted that the fiber filaments wrap the two inner wheels 334 in an "S" shape. The "S" shape design increases the wrap angle of the fiber filaments on the two inner wheels 334, ensuring that even if there is friction or load on the inner wheels 334, the fiber filaments can still transmit enough force to drive the inner wheels 334. Under the driving action of the fiber filaments, the rotation directions of the two inner wheels 334 are opposite, asFigure 10 as shown

[0047] The force-bearing plate 335 is a metal sheet, and multiple force-bearing plates 335 are circumferentially distributed along the axis of the inner wheel 334. The force-bearing plate 335 realizes the rigid support function, remains unchanged under the action of the air flow, and drives the inner wheel 334 to rotate.

[0048] As Figure 2 shown, the reciprocating member includes a frame 31 mounted on the substrate 1 and a cylinder 32 mounted outside the frame 31. The outer side of the cylinder 32 has an output shaft 331 that realizes expansion and contraction, and the output shaft 331 is connected to the tensiometer 33.

[0049] Specifically, the reciprocating member is used to drive the tensiometer 33 and the pneumatic part 36 to perform reciprocating motion. The reciprocating member is the acting cylinder of the cylinder 32. The cylinder 32 drives the piston rod to move linearly through compressed air, driving the tensiometer 33 and the pneumatic part 36 to move horizontally back and forth, so that the fiber filaments are evenly distributed on the surface of the winding drum 2, avoiding local accumulation. The stroke of the cylinder 32 can be adjusted by mechanical limit or electronic control to adapt to different sizes of the winding drum 2; the movement speed is controlled by an air path speed regulating valve to match the rotation speed of the winding drum 2 to ensure consistent winding density. In addition, the pneumatic system has a fast response and is suitable for high-speed production scenarios such as chemical fiber and industrial yarn winding. It can achieve hundreds of reciprocating motions per minute. Compared with motor drive, the cylinder 32 has a compact structure, low maintenance cost, and is resistant to industrial environments such as dust and humidity.

[0050] As Figure 4 、 Figure 5 and Figure 10 shown, the tensiometer 33 further includes a box body 332 and a cover body 336. The cover body 336 is detachably fixed to the outer end of the box body 332. A chamber is formed inside the box body 332. The outside of the box body 332 is fixed to the output shaft 331 to realize the movement of the box body 332 along with the cylinder 32. Both inner wheels 334 are rotatably installed inside the box body 332 to keep the distance between the two inner wheels 334 and keep the two inner wheels 334 stable during the transmission of the fiber filaments;

[0051] Connection grooves 333 for the fiber filaments to enter and exit are provided on both the upper and lower sides of the box body 332. The outer side of the cover body 336 has two circular holes, and the force-bearing plates 335 extend outwards from the circular holes. The opening position of the connection groove 333 ensures that the fiber filaments run in a preset S shape. The edge of the opening of the connection groove 333 is usually designed to be chamfered or polished to reduce the wear of the fiber filaments when passing through.

[0052] The box body 332 has a double-chamber, and its axial cross-section is an "8"-shaped closed curve structure. The outer diameter of the inner wheel 334 is smaller than the inner diameter of the corresponding chamber of the box body 332, so that the two inner wheels 334 can be installed in the double-chamber. In addition, when the fiber thread passes through the two inner wheels 334, the fiber thread is located outside the two inner wheels 334 and close to the inner wall of the double-chamber;

[0053] As Figure 9 shown, an air inlet groove 337 is integrally formed on the outer side of the cover body 336. The extension line of the bottom of the air inlet groove 337 forms an angle with the air outlet of the pneumatic part 36, which is used to guide the airflow generated by the pneumatic part 36 into the interior of the box body 332 to form an airflow scouring network covering the entire circumference inside the box body 332. After the pneumatic part 36 generates airflow, while the airflow drives the force-bearing plate 335 to move, there will also be local airflow penetrating between the upper and lower parts of the force-bearing plate 335 and entering the air inlet groove 337 to recycle the local airflow, so that the airflow moves along the inner wall between the double-chamber and the two inner wheels 334 and along the surface of the fiber filament to strip the dust, broken wire burrs and residual coating on the surface of the fiber filament.

[0054] The pneumatic part 36 includes a pneumatic box 361 and a pneumatic motor 362 fixed on the outside of the pneumatic box 361. The pneumatic box 361 is fixed on the outside of the cover body 336, and an impeller is installed inside it. The impeller is connected to the output end of the pneumatic motor 362. The horizontal extension line of the air outlet end of the pneumatic box 361 coincides with the symmetry line of the two inner wheels 334, so that the force-bearing plates 335 on the two inner wheels 334 are subjected to resistance;

[0055] As Figure 5 shown, an air inlet is opened on the outside of the pneumatic box 361. The diameter of the pneumatic box 361 changes in a gradually shrinking manner along the air outlet direction. The cross-sectional area of the pneumatic box 361 is reduced to increase the airflow movement speed, which is suitable for the environment where resistance is generated by the two inner wheels 334.

[0056] Specifically, the pneumatic box 361 is rigidly fixed on the side of the cover body 336, and an impeller is installed inside it. The impeller is driven by the pneumatic motor 362, so that the air outlet end of the pneumatic box 361 can generate an outward jet airflow, and the airflow can be adjusted according to the operating speed of the pneumatic motor 362. The airflow moving horizontally at the air outlet end of the pneumatic box 361 can simultaneously exert a force on the force-bearing plates 335 of the two inner wheels 334. Although the forces generated by the two inner wheels 334 are opposite, for the fiber filament, they are the same-direction resistance, and the size of the airflow controls the size of the resistance to realize the control of the fiber filament tension.

[0057] As Figure 6 and Figure 7As shown in the figure, the secondary tension control unit 3 further includes a first support shaft 34 fixed to the substrate 1 and a signal processing module. A first guide wheel 35 for transmitting the fiber filament is rotatably sleeved on the first support shaft 34. There is a ring of pressure sensors 351 inside the first guide wheel 35. The input end of the signal processing module is electrically connected to the pressure sensors 351, and the output end forms a closed-loop feedback circuit with the control end of the pneumatic motor 362.

[0058] Specifically, the first guide wheel 35 is used to conduct the fiber filament moving out of the tensiometer 33, and then the fiber filament is wound. Before the fiber filament is wound, it needs to pass through the first guide wheel 35. Therefore, the tension generated by the fiber filament directly acts on the first guide wheel 35. As the fiber filament becomes tighter, the extrusion force on the first guide wheel 35 increases, and thus the extrusion effect on the pressure sensors 351 increases. The pressure sensors 351 generate electrical signals and transmit them to the signal processing module, and drive the rotational speed of the pneumatic motor 362 to decrease, so that the resistance of the two inner wheels 334 decreases, thereby adjusting the tension of the fiber filament and keeping the tension of the fiber filament within a certain range. It should be noted that the tension of the pen core fiber filament is generally controlled within 5 - 15 N. By reasonably controlling the tension fluctuation rate, the winding tightness and uniformity can be ensured.

[0059] It should also be noted that the pressure sensors 351 can be of a thin-film type or an annular structure. The thin-film type can be arranged in a ring and is electrically connected to the signal processing module.

[0060] When the detected value of the pressure sensors 351 exceeds the preset threshold, the rotational speed of the pneumatic motor 362 is reduced by 20% - 30% to control the tension of the fiber filament. After the rotational speed of the pneumatic motor 362 is reduced, the resistance of the two inner wheels 334 decreases, so the fiber filament is more easily transmitted, and thus the tension can be relieved.

[0061] As Figure 2 and Figure 8 As shown in the figure, the device further includes a primary tension control unit 4. The primary tension control unit 4 is a pre-step of the secondary tension control unit 3. The fiber filament moves to the secondary tension control unit 3 after passing through the primary tension control unit 4. Its core function is to provide a basic guarantee for the subsequent tension control. The primary tension control unit 4 includes a second support shaft 41 fixed to the substrate 1. A second guide wheel 42 for transmitting the fiber filament is rotatably sleeved on the second support shaft 41. The function of the second guide wheel 42 is to guide the direction of the fiber filament so that it enters the secondary tension control unit 3 in the correct direction.

[0062] The first guide wheel 35 and the second guide wheel 42 are respectively located on both sides of the tensioner 33. Support layers 352 with grooves are fixed on the outer sides of the first guide wheel 35 and the second guide wheel 42. A guide frame 5 is fixed on the output shaft 331. The guide frame 5 has multiple ends, and clamping wheels 353 are fixed at the ends thereof and are clamped in the grooves of the support layer 352, so as to control the movement of the first guide wheel 35 and the second guide wheel 42 along with the tensioner 33;

[0063] The support layer 352 with grooves is provided on the outer sides of both the first guide wheel 35 and the second guide wheel 42 and cooperates with the clamping wheels 353 of the guide frame 5, so that the clamping wheels 353 push the first guide wheel 35 and the second guide wheel 42 laterally, and does not affect the rotation of the first guide wheel 35 and the second guide wheel 42.

[0064] Both the first guide wheel 35 and the second guide wheel 42 can reciprocate along with the tensioner 33. The first guide wheel 35, the second guide wheel 42 and the connecting groove 333 are located in the same plane, so that the fiber filaments entering or moving out of the tensioner 33 can avoid deviation or distortion caused by unilateral force, especially applicable to the case of high-speed and stable transmission.

[0065] The working principle of the present invention: The fiber filaments pass through the second guide wheel 42, the tensioner 33 and the first guide wheel 35 in a continuous wrapping manner, and finally wind into the winding drum 2. The telescopic movement of the air cylinder 32 realizes the reciprocating movement of the second guide wheel 42, the tensioner 33 and the first guide wheel 35, and winds the fiber filaments reciprocally.

[0066] When the fiber filaments pass through the tensioner 33, as Figure 10 shown, they enter from the connecting groove 333 on one side of the box body 332 and move out from the connecting groove 333 on the other side, pass through the two inner wheels 334 in an "S" shape, form an extrusion effect with the inner wheels 334 and drive the inner wheels 334 to rotate as the fiber filaments move. The inner wheels 334 are in directional frictional contact with the fiber filaments. The force-receiving plates 335 on the outer sides of the inner wheels 334 are subject to the resistance of the wind force of the pneumatic part 36, so that there is a certain resistance to the rotation of the inner wheels 334, stretch the fiber filaments and maintain a certain tension effect.

[0067] It should be noted that the fiber filaments are extruded with the two inner wheels 334 through an "S" - shaped path. Combining with the wind resistance applied by the pneumatic part 36 to the force - receiving plate 335, the rotational resistance of the inner wheel 334 is dynamically matched with the movement speed of the fiber filaments, offsetting the tension fluctuations of the fiber filaments caused by external disturbances such as speed fluctuations or material elasticity changes, and ensuring that the fiber filaments always maintain a constant tension. Secondly, the pneumatic part 36 applies resistance to the force - receiving plate 335 through wind force, avoiding the physical contact wear problems of traditional mechanical springs or friction plates. The magnitude of the resistance can be precisely controlled by adjusting the wind pressure or air flow speed, and it is applicable to high - precision and high - response scenarios. The two inner wheels 334 form a directional frictional contact with the fiber filaments, reducing the risk of lateral slippage or skidding of the fiber filaments while ensuring effective transmission.

[0068] During the process of winding the fiber filaments, the fiber filaments are also extruded with the first guide wheel 35. The pressure sensor 351 on the first guide wheel 35 controls the rotational speed of the pneumatic motor 362 to achieve precise control of the magnitude of the wind pressure and the rotational resistance of the inner wheel 334. Specifically: when the tension of the fiber filaments increases, the pressure on the first guide wheel 35 rises → the signal of the pressure sensor 351 strengthens → the rotational speed of the pneumatic motor 362 decreases → the wind force weakens → the rotational resistance of the inner wheel 334 decreases → the tension of the fiber filaments automatically drops back to the set threshold, and vice versa.

[0069] In addition, the gas generated by the pneumatic part 36 finally enters the air inlet groove 337, and forms an air flow effect through the gap between the box body 332 and the inner wheel 334 to strip the dust, broken - wire burrs and residual coatings on the surface of the fiber filaments.

[0070] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0071] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-stage constant tension winding assembly for pen core fiber, comprising a substrate and a winding drum mounted on the substrate, characterized in that: It also includes a secondary tension control unit, the secondary tension control unit including: Reciprocating parts; A tensioner is installed at the output end of the reciprocating component. The tensioner includes two rotatable inner wheels. The two inner wheels guide the fiber filaments. The fiber filaments are in an "S" shape. The two inner wheels rotate with the movement of the fiber filaments. The outer sides of the two inner wheels are both installed with force plates. The pneumatic part is installed on the outside of the tensioner and is used to generate airflow to the force-bearing plate, forming resistance to the movement of the two inner wheels, thereby achieving fiber tension adjustment.

2. The multi-stage constant tension winding assembly for pen core fibers according to claim 1, characterized in that: The reciprocating component comprises a frame installed on a base plate and a cylinder installed outside the frame. The outer side of the cylinder is provided with an output shaft for achieving telescopic movement, and the output shaft is connected to a tensioner.

3. The multi-stage constant tension winding assembly for pen core fibers according to claim 2, characterized in that: The tensioner also includes a box body and a cover body matched with the box body, the outer side of the box body is fixed to the output shaft, and the two inner wheels are rotatably installed in the box body; The upper and lower sides of the box body are both provided with connection grooves for the fiber filaments to enter and exit. The outer side of the cover body is provided with two circle holes, and the force-bearing plate extends outwards from the circle holes.

4. The multi-stage constant tension winding assembly for pen core fibers according to claim 3, characterized in that: The pneumatic part includes a pneumatic box and a pneumatic motor fixed on the outside of the pneumatic box. The pneumatic box is fixed on the outside of the cover body, and an impeller is installed inside the pneumatic box. The impeller is connected to the output end of the pneumatic motor. The horizontal extension line of the air outlet end of the pneumatic box coincides with the symmetry lines of the two inner wheels, so that the force-bearing plates on the two inner wheels are subject to resistance.

5. The multi-stage constant tension winding assembly for pen core fibers according to claim 1, characterized in that: The force-bearing plates are metal sheets, and a plurality of force-bearing plates are distributed along the circumference of the axis of the inner wheel.

6. The multi-stage constant tension winding assembly for pen core fibers according to claim 4, characterized in that: An air inlet is provided on the outer side of the pneumatic box, and the diameter of the pneumatic box changes gradually along the air outlet direction.

7. The multi-stage constant tension winding assembly for pen core fibers according to claim 3, characterized in that: The box body has a double chamber, and its axial cross section is an "8"-shaped closed curve structure, and the outer diameter of the inner wheel is smaller than the inner diameter of the corresponding chamber of the box body; An air inlet groove is integrally formed on the outer side of the cover body, and the bottom extension line of the air inlet groove forms an angle with the air outlet of the pneumatic part, which is used to guide the airflow generated by the pneumatic part to the inside of the box body, forming an airflow flushing network covering the entire circumference of the inside of the box body.

8. The multi-stage constant tension winding assembly for pen core fibers according to claim 4, characterized in that: The secondary tension control unit also includes a support shaft 1 fixed on the base plate and a signal processing module. A guide wheel 1 for transmitting the fiber filament is rotatably sleeved on the support shaft 1. A circle of pressure sensors is provided on the inner side of the guide wheel 1. The input end of the signal processing module is electrically connected to the pressure sensor, and the output end forms a closed-loop feedback circuit with the control end of the pneumatic motor.

9. The multi-stage constant tension winding assembly for pen core fibers according to claim 8, characterized in that: When the detection value of the pressure sensor exceeds a preset threshold, the speed of the pneumatic motor is reduced by 20%-30% to control the tension of the fiber.

10. The multi-stage constant tension winding assembly for pen core fibers according to claim 8, characterized in that: The device also includes a primary tension control unit, which includes a second support shaft fixed on a base plate, and a second guide wheel for transmitting the fiber filaments is rotatably sleeved on the second support shaft; The guide wheel one and the guide wheel two are respectively located on both sides of the tensioner, and a support ring layer with a groove is fixed on the outer side of the guide wheel one and the guide wheel two. A guide frame is fixed on the output shaft, and the guide frame has multiple ends, and a clamping wheel is fixed on the end of the guide frame and is clamped in the groove of the support ring layer, so as to control the guide wheel one and the guide wheel two to move with the tensioner.

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