A multi-strand cotton sliver bundling and combining device

By designing a traction unit and a sliver forming unit for a multi-strand cotton sliver bundling device, combined with cleaning and anti-static components, the problem of cotton sliver clogging was solved, achieving stable conveying and efficient cleaning, and improving the quality of cotton sliver forming.

CN122105701APending Publication Date: 2026-05-29HEBEI GAIBO TEXTILE CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI GAIBO TEXTILE CO LTD
Filing Date
2026-04-20
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing multi-strand cotton sliver bundling and combining devices are prone to clogging due to the adhesion of cotton wax and impurities, and lack an effective online cleaning mechanism, which affects the smooth conveying of cotton slivers and the forming quality.

Method used

The device design includes a mounting frame, a traction unit, and a sliver forming unit. Through the combination of a drafting bundler, a bundle guide roller, a sliver bundler, and a pressing guide roller, a continuous bundling, guiding, and compaction process is formed. It is also equipped with a cleaning component and an anti-static component to achieve stable sliver transport and timely removal of impurities.

Benefits of technology

It effectively avoids clogging of tampons during the conveying process, improves the continuity of the device's operation and the quality of tampon forming, ensures smooth conveying and efficient cleaning of tampons, and reduces the frequency of downtime.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a multi-strand cotton sliver bundling and combining device and belongs to the technical field of textiles, which comprises a mounting frame, a traction unit and a sliver forming unit. The sliver forming unit is arranged at one end of the mounting frame, and the traction unit is rotationally arranged on the mounting frame. The sliver forming unit comprises a shell, wherein a draft bundler, a bundling guide roller, a sliver outlet bundler, a pressing guide roller and a coiling device are sequentially arranged in the shell along a conveying direction. One end of the draft bundler is connected with the traction unit. The bundling guide roller is located on one side of the other end of the draft bundler, and the bundling guide roller is rotationally connected with the shell. One end of the sliver outlet bundler is located at the bundling guide roller, and the sliver outlet bundler is fixedly connected with the shell. The pressing guide roller is located at the other end of the sliver outlet bundler, and the pressing guide roller is rotationally connected with the shell. One end of the coiling device is fixedly arranged on the shell at the pressing guide roller. The application has the technical effects of improving conveying smoothness and preventing blockage.
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Description

Technical Field

[0001] This application relates to the technical field of textiles, and in particular to a device for bundling and combining multiple strands of cotton sliver. Background Technology

[0002] In cotton spinning, bundling multiple cotton slivers is a key process for improving sliver uniformity and enhancing fiber cohesion. By merging, drafting, and bundling multiple carded cotton slivers, the weight unevenness of the slivers can be effectively reduced, the internal structure of the slivers can be optimized, and a stable quality semi-finished product can be provided for subsequent roving and spinning processes. This directly affects the strength, evenness, and appearance quality of the final yarn.

[0003] Existing multi-strand cotton sliver bundling devices mostly adopt a structure of fixed channel bundling and passive traction conveying. During the bundling process, cotton slivers are prone to loosening and displacement. In addition, the device lacks an effective online cleaning mechanism, and cotton wax, short fibers and impurities are easily adhered and accumulated on the inner wall of the bundling channel.

[0004] Regarding the aforementioned technologies, the inventors believe that there is a defect in the clustering channel being prone to blockage due to the adhesion of cotton wax and impurities. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this application provides a device for bundling and combining multiple strands of cotton sliver.

[0006] This application provides a device for bundling and combining multi-strand cotton slivers, which adopts the following technical solution: A multi-strand cotton sliver bundling and combining device includes a mounting frame, a traction unit, and a sliver forming unit. The sliver forming unit is disposed at one end of the mounting frame, and the traction unit is rotatably disposed on the mounting frame. The sliver forming unit includes a housing, and inside the housing, along the conveying direction, are sequentially arranged a drafting bundler, a bundle guide roller, a sliver output bundler, a pressing guide roller, and a coiling device. One end of the drafting bundler is connected to the traction unit. The bundle guide roller is located on one side of the other end of the drafting bundler and is rotatably connected to the housing. One end of the sliver output bundler is located at the bundle guide roller and is fixedly connected to the housing. The pressing guide roller is located at the other end of the sliver output bundler and is rotatably connected to the housing. One end of the coiling device is fixedly disposed on the housing at the pressing guide roller.

[0007] By adopting the above technical solution, including the mounting frame, traction unit, and sliver forming unit, the drafting and bundling device in the sliver forming unit is connected to the traction unit, ensuring a smooth transition in sliver feeding. This reduces sliver scattering and fuzzing at the inlet, and prevents short fibers and impurities from accumulating at the drafting and bundling device inlet, thereby reducing blockage and ensuring smooth sliver transport. The sliver forming unit is arranged sequentially along the sliver transport direction, including the drafting and bundling device, bundling guide roller, sliver exit bundling device, pressing guide roller, and coiling device, forming a bundle, guiding, secondary coagulation, and compaction process. The complete and continuous coiling process enables the one-time coalescence and forming of multiple cotton slivers, while avoiding sliver jamming and accumulation at process junctions, thus reducing the risk of blockage in the drafting and bundling device. The bundling guide roller and pressing guide roller are rotated, while the drafting and bundling device and the sliver output bundling device are fixed, ensuring stable and reliable operation. This effectively reduces sliver shaking, deviation, and accidental drafting during the conveying process, and prevents fibers from scattering and falling into the drafting and bundling device. Structurally, this reduces the risk of blockage and improves the continuity of device operation and the quality of cotton sliver forming.

[0008] Preferably, the traction unit includes multiple sets of traction rollers, which are evenly arranged on both sides of the mounting frame in a horizontal direction. The traction rollers are rotatably connected to the mounting frame. A cleaning assembly is provided between the set of traction rollers closest to the strip forming unit and the housing. The cleaning assembly includes a drive mechanism and an air supply mechanism. One end of the drive mechanism is fixedly disposed at one end of the traction roller, and the other end of the drive mechanism abuts against one end of the air supply mechanism. The other end of the air supply mechanism is connected to the stretching and bundling device. A feeding assembly is rotatably disposed on the mounting frame above the traction rollers.

[0009] By adopting the above technical solution, multiple sets of traction rollers are horizontally and evenly arranged on the mounting frame to form multi-stage segmented traction. This ensures uniform distribution of traction force on multiple cotton slivers and smooth conveying, effectively avoiding problems such as accidental stretching, deviation, and overlapping disorder during the conveying process, and improving the uniformity of merging. The traction rollers drive the cleaning component to achieve synchronous operation of traction conveying and cleaning. The air supply mechanism is directly connected to the stretching and bundling device to clean the inside of the bundling device with airflow, promptly removing impurities such as cotton wax, short fibers, and oil stains, avoiding channel blockage, ensuring smooth cotton sliver conveying, reducing the frequency of downtime for cleaning, and improving continuous working capacity. A rotating feeding component is set above the traction rollers, which can adaptively compress the cotton sliver, ensuring stable and reliable feeding, preventing the cotton sliver from loosening and bouncing at the inlet, and further improving the consistency and continuity of multi-strand cotton sliver feeding.

[0010] Preferably, the cross-section of one end of the drafting bundle is flat, and the width of one end of the drafting bundle matches the width of the traction roller; the cross-section of the other end of the drafting bundle is circular, and the diameter of the other end of the drafting bundle matches the diameter of one end of the output bundle; a bundle channel is formed inside the drafting bundle, and the bundle channel gradually narrows along the width direction from one end of the drafting bundle to the other end of the drafting bundle.

[0011] By adopting the above technical solution, one end of the drafting and bundling device has a flat cross-section with a width matching the width of the traction roller, which can fully receive multiple strands of cotton sliver being conveyed in parallel. The bundling channel gradually narrows, realizing a smooth transition of the cotton sliver from a web state to a round sliver shape, applying progressive gathering constraint to the fibers, and avoiding sudden compression that causes fiber disorder and cotton sliver knotting. The other end of the drafting and bundling device is round with a diameter that matches the output bundling device, resulting in high roundness and uniform cross-section of the cotton sliver, providing a good foundation for subsequent secondary compaction and shaping. The gradually narrowing bundling channel can complete the initial merging and bundling of multiple strands of cotton sliver without generating violent stretching, with gentle fiber stress, effectively reducing short fiber fly and improving the evenness of the cotton sliver.

[0012] Preferably, the wall of the drawing bundle has a cavity, and a partition is provided inside the cavity of the drawing bundle wall, dividing the cavity of the drawing bundle wall into a heating zone and a discharge zone. Multiple sets of discharge holes are provided on the inner wall of the drawing bundle, and the discharge holes communicate with the discharge zone. A discharge pipe is provided on the drawing bundle, and a negative pressure port is provided on the side of the discharge pipe. The discharge pipe communicates with the discharge zone through the negative pressure port, and one end of the discharge pipe is connected to the other end of the air supply mechanism. A heating coil is provided in the heating zone.

[0013] By adopting the above technical solution, the wall of the traction bundler is provided with a cavity, which is separated into a heating zone and a discharge zone by a partition. A heating coil is installed in the heating zone to heat the inner wall of the bundle channel at a constant temperature, so that the cotton wax and grease adhering to the wall surface soften and melt, greatly reducing their adhesion and facilitating subsequent removal. Multiple sets of discharge holes are opened in the inner wall and connected to the discharge zone. With the help of negative pressure suction, the molten cotton wax, oil stains and short lint impurities can be directly sucked out from the source, avoiding the accumulation of impurities and causing channel blockage, and ensuring smooth cotton sliver delivery. The discharge pipe is connected to the discharge zone through the negative pressure port and directly connected to the air supply mechanism, realizing the dual function of airflow negative pressure suction and purging. It can not only efficiently suck out impurities, but also discharge the dirt to the outside in time, and clean thoroughly. The end of the negative pressure port away from the discharge pipe is connected to the air supply mechanism, so impurities will not be sucked into the air supply mechanism when the air supply mechanism is suctioned.

[0014] Preferably, the driving mechanism includes a first sprocket, a second sprocket, a transmission chain, and a driving rod; the first sprocket is fixedly connected to one end of the traction roller, the second sprocket is rotatably mounted on the mounting frame, and the transmission chain is sleeved on the first sprocket and the second sprocket; the first sprocket drives the second sprocket to rotate through the transmission chain; one end of the driving rod is rotatably mounted on one side of the end face of the second sprocket, and the other end of the driving rod is rotatably mounted on the air supply mechanism.

[0015] By adopting the above technical solution, the transmission is carried out through the first sprocket, the second sprocket and the transmission chain. The transmission is reliable and the transmission ratio is accurate. It can stably transmit the rotational motion of the traction roller. The cleaning mechanism is driven by the power of the traction roller. The second sprocket and the drive rod form a crank-connecting rod structure, which converts the rotational motion into linear reciprocating motion and provides a stable reciprocating driving force for the air supply mechanism.

[0016] Preferably, the gas supply mechanism includes a piston cylinder, a piston rod, a piston block, and a gas guide pipe; the piston cylinder is fixedly disposed within the housing, the piston block is slidably disposed within the piston cylinder, and one end of the piston rod is fixedly disposed on the piston block; the other end of the piston rod passes through the piston cylinder and the housing, and the piston rod is slidably connected to the piston cylinder and the housing; the other end of the piston rod is rotatably connected to the other end of the drive rod; an air outlet is provided at the top of the piston cylinder; one end of the gas guide pipe is connected to the air outlet, and the other end of the gas guide pipe is connected to one end of the discharge pipe.

[0017] By adopting the above technical solution, during the piston rod retraction stroke, the internal volume of the piston cylinder increases to form a negative pressure, which stably draws out impurities such as molten cotton wax, oil stains, and short fibers from the inner wall of the bundled channel through the pipeline and discharge hole. During the piston rod extension stroke, the internal volume of the cylinder decreases to form a positive pressure. On the one hand, the high-speed airflow generates a suction effect near the negative pressure port, continuing to draw in residual impurities from the inner wall into the discharge area. On the other hand, the positive airflow powerfully blows out the dirt collected in the discharge pipe, achieving both thorough suction and empty discharge, and avoiding the accumulation and blockage of impurities.

[0018] Preferably, an antistatic assembly is provided at one end of the drawing bundle assemblies. The antistatic assembly includes a liquid storage tank, a liquid guiding hose, a fixing bracket, and a porous ceramic rod. The liquid storage tank is fixedly mounted on the top of the housing. The fixing bracket is located above one end of the drawing bundle assemblies and is slidably mounted on the housing. The porous ceramic rod is fixedly mounted on the fixing bracket. One end of the liquid guiding hose is connected to the liquid storage tank, and the other end of the liquid guiding hose is connected to the porous ceramic rod.

[0019] By adopting the above technical solution, the antistatic component uses a liquid storage tank, a liquid guiding hose, and a porous ceramic rod structure. Gravity and liquid level pressure are used to deliver the antistatic agent in the storage tank to the porous ceramic rod through the liquid guiding hose. The porous ceramic rod has uniform micropores, allowing the antistatic agent to slowly seep out and form a uniform thin liquid film on its surface. This film is then atomized by the high-speed airflow through the cotton sliver, with fine droplets evenly adhering to the surface of the cotton sliver. This effectively neutralizes the static electricity generated by high-speed traction, preventing fibers from flying, tangling, or scattering due to static electricity. A fixed bracket is slidably installed on the housing, allowing flexible adjustment of the porous ceramic rod's position to ensure the atomization area covers the cotton sliver channel, resulting in a stable and reliable antistatic effect. The antistatic agent is applied in a micro-volume, continuous, and uniform manner, achieving a good static elimination effect without causing the cotton sliver to become too wet or have excessive oil content, thus not affecting subsequent drafting, doubling, and spinning quality.

[0020] Preferably, the size of one end of the sliver bundler is adapted to the diameter of the other end of the drawing bundler; the cross-section of the other end of the sliver bundler is circular, and the diameter of the other end of the sliver bundler is smaller than that of the first end of the sliver bundler; a compaction channel is formed inside the sliver bundler, and the compaction channel gradually narrows radially from one end of the sliver bundler to the other end of the sliver bundler.

[0021] By adopting the above technical solution, the inlet diameter of the sliver bundler and the outlet diameter of the draft bundler are matched, and the transition from the initial bundling to the secondary compaction of the sliver is smooth, ensuring continuous and stable sliver conveying. The compaction channel inside the sliver bundle has a conical structure that gradually narrows radially along the conveying direction, applying progressive radial extrusion force to the sliver, so that the fibers gradually become tightly bound together, avoiding sudden shrinkage that could cause fiber knotting, increased fuzz, or sliver breakage. The outlet diameter is smaller than the inlet diameter, further improving the density and roundness of the sliver.

[0022] Preferably, the coiling device includes a coiling disc and a rotating base; the coiling disc is rotatably disposed in the upper part of the housing; a spiral inclined tube is disposed inside the coiling disc, one end of the spiral inclined tube is disposed at the center of the top of the coiling disc, and the other end of the spiral inclined tube is disposed at an eccentric position at the bottom of the coiling disc; a feed pipe is fixedly disposed at the center of the top of the coiling disc, and the feed pipe communicates with the spiral inclined tube; a first motor is disposed inside the housing, and a transmission belt is disposed between the first motor and the feed pipe; the working end of the first motor is connected to the feed pipe through the transmission belt, and the first motor provides power for the rotation of the coiling disc; a second motor is disposed at the bottom of the housing, and the rotating base is fixedly disposed at the working end of the second motor, and the second motor provides power for the rotation of the rotating base.

[0023] By adopting the above technical solution, the coiling disc and the rotating base are driven by the first motor and the second motor, respectively. The rotation speed of the coiling disc and the rotating base can be adjusted separately, so as to achieve orderly stacking and uniform density of cotton slivers, which is not easy to collapse, crush, or tangle. The coiling disc has a built-in spiral inclined tube, and the cotton slivers are fed from the center and discharged eccentrically. With the rotation of the coiling disc, a stable circumferential trajectory is formed. The cotton slivers turn smoothly without sharp bending stress, are not easy to break, and do not increase fuzz. The spiral inclined tube structure can not only guide the cotton slivers to fall smoothly, but also play a certain role in assisting tensioning and sorting the cotton slivers during rotation, further improving the roundness of the slivers.

[0024] Preferably, the feeding assembly includes a rotating frame, a pressure roller, and two sets of pressure springs; the upper part of the rotating frame is rotatably mounted on a mounting frame above the traction roller; the pressure roller is rotatably mounted on the rotating frame; the two sets of pressure springs are respectively mounted at both ends of the rotating frame; one end of the pressure spring is rotatably mounted on the rotating frame, and the other end of the pressure spring is rotatably mounted on the mounting frame; the pressure roller abuts against the traction roller.

[0025] By adopting the above technical solution, the pressure roller and the traction roller abut against each other to form an elastic clamping feed, which applies a stable and moderate pressure to the cotton sliver. This not only ensures reliable clamping and conveying but also prevents excessive squeezing that could deform the cotton sliver or damage the fibers. The feeding is smooth and stable. The pressure springs act on both ends of the rotating frame, ensuring that the pressure roller is evenly stressed and fits flat.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The traction bundler has a cavity inside its wall, which is separated into a heating zone and a discharge zone by a partition. The heating zone is equipped with a heating coil to heat the inner wall of the bundle channel at a constant temperature, causing the cotton wax and grease adhering to the wall surface to soften and melt, greatly reducing their adhesion and facilitating subsequent removal. Multiple discharge holes are opened on the inner wall and connected to the discharge zone. With the help of negative pressure suction, the molten cotton wax, oil stains and short lint impurities can be directly sucked out from the source, avoiding the accumulation of impurities and causing channel blockage, and ensuring smooth cotton sliver delivery. The discharge pipe is connected to the discharge zone through the negative pressure port and directly connected to the air supply mechanism, realizing the dual function of negative pressure suction and purging, which can not only efficiently suck out impurities, but also promptly discharge the dirt to the outside, resulting in thorough cleaning.

[0027] 2. The antistatic component adopts a structure consisting of a liquid storage tank, a liquid guiding hose, and a porous ceramic rod. Gravity and liquid pressure are used to deliver the antistatic agent from the storage tank to the porous ceramic rod via the liquid guiding hose. The porous ceramic rod has uniform micropores, allowing the antistatic agent to slowly seep out and form a uniform thin liquid film on its surface. This film is then atomized by the high-speed airflow through the cotton sliver, with fine droplets evenly adhering to the surface of the sliver. This effectively neutralizes the static electricity generated by high-speed traction, preventing fibers from flying, tangling, or scattering due to static electricity. A fixed bracket is slidably mounted on the housing, allowing for flexible adjustment of the porous ceramic rod's position to ensure the atomization area covers the cotton sliver channel, resulting in a stable and reliable antistatic effect. The antistatic agent is applied in a micro-volume, continuous, and uniform manner, achieving a good static elimination effect without causing the cotton sliver to become too wet or have excessive oil content, thus not affecting subsequent drafting, doubling, and spinning quality. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure in the embodiment.

[0029] Figure 2 This is a schematic diagram of the traction unit in the embodiment.

[0030] Figure 3 yes Figure 1 A magnified view of part A in the middle.

[0031] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the housing in the embodiment.

[0032] Figure 5 yes Figure 4 A magnified view of part B in the middle.

[0033] Explanation of reference numerals in the attached drawings: 1. Mounting frame; 2. Traction unit; 21. Traction roller; 22. Feeding assembly; 221. Rotating frame; 222. Pressure roller; 223. Pressure spring; 3. Sliver forming unit; 31. Housing; 32. Drafting bundler; 321. Bundling channel; 322. Cavity; 3221. Partition; 3222. Heating zone; 3223. Discharge zone; 3224. Discharge hole; 3225. Heating coil; 323. Discharge pipe; 3231. Negative pressure port; 33. Bundling guide roller; 34. Sliver bundler; 341. Compaction channel; 35. Pressing guide roller; 36. Coil 361. Strip feeder; 3611. Strip coiler; 3612. Spiral inclined tube; 362. Feed pipe; 363. Rotating base; 364. First motor; 365. Second motor; 4. Cleaning assembly; 41. Drive mechanism; 411. First sprocket; 412. Second sprocket; 413. Transmission chain; 414. Drive rod; 42. Air supply mechanism; 421. Piston cylinder; 4211. Air outlet; 422. Piston rod; 423. Piston block; 424. Air guide pipe; 5. Static elimination assembly; 51. Liquid storage tank; 52. Liquid guide hose; 53. Fixing bracket; 54. Porous ceramic rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a device for bundling and combining multiple strands of cotton sliver. (Refer to...) Figure 1 The assembly includes a mounting frame 1, a traction unit 2, and a sliver forming unit 3. The sliver forming unit 3 is located at one end of the mounting frame 1, and the traction unit 2 is rotatably mounted on the mounting frame 1. The sliver forming unit 3 includes a housing 31, and inside the housing 31, along the conveying direction, are sequentially arranged a drafting bundler 32, a bundle guide roller 33, a sliver output bundler 34, a pressing guide roller 35, and a coiler 36. One end of the drafting bundler 32 is connected to the traction unit 2. The bundle guide roller 33 is located on one side of the other end of the drafting bundler 32 and is rotatably connected to the housing 31. One end of the sliver output bundler 34... Located at the bundling guide roller 33, the sliver bundling device 34 is fixedly connected to the housing 31. The pressing guide roller 35 is located at the other end of the sliver bundling device 34 and is rotatably connected to the housing 31. One end of the coiling device 36 is fixedly set on the housing 31 at the pressing guide roller 35. Multiple strands of cotton sliver enter the forming unit 3 through the traction unit 2. The multiple strands of cotton sliver are sequentially combined and stretched by the stretching bundling device 32, conveyed and positioned by the bundling guide roller 33, condensed into slivers by the sliver bundling device 34, and compacted and shaped by the pressing guide roller 35. Finally, the coiling device 36 regularly coils the sliver into the cotton sliver can.

[0036] Reference Figure 1 and Figure 2 The traction unit 2 includes multiple sets of traction rollers 21, which are evenly arranged on both sides of the mounting frame 1 in a horizontal direction. The traction rollers 21 are rotatably connected to the mounting frame 1. The traction rollers 21 are driven to rotate by a drive motor installed on the mounting frame 1. A cleaning assembly 4 is provided between the set of traction rollers 21 closest to the strip forming unit 3 and the housing 31. The cleaning assembly 4 includes a drive mechanism 41 and an air supply mechanism 42. One end of the drive mechanism 41 is fixedly installed at one end of the traction roller 21, and the other end of the drive mechanism 41 abuts against one end of the air supply mechanism 42. The other end of the air supply mechanism 42 is connected to the stretching and bundling unit 32. The feeding assembly 22 is rotatably mounted on the mounting frame 1 above the traction roller 21; multiple sets of traction rollers 21 are evenly arranged on both sides of the mounting frame 1 in the horizontal direction and rotate synchronously to form multi-stage traction; multiple cotton slivers are sequentially transported to the sliver forming unit 3 by each set of traction rollers 21 through the feeding assembly 22; the last set of traction rollers 21 near the sliver forming unit 3 continues to transport the cotton slivers forward into the drafting and bundling device 32 on the one hand, and drives the cleaning assembly 4 to move on the other hand; the drive mechanism 41 transmits the rotational power of the traction roller 21 to the air supply mechanism 42, and the airflow generated by the air supply mechanism 42 is directly connected to the interior of the drafting and bundling device 32.

[0037] Reference Figure 2The feeding assembly 22 includes a rotating frame 221, a pressure roller 222, and two sets of pressure springs 223. The upper part of the rotating frame 221 is rotatably mounted on a mounting frame 1 above the traction roller 21. The pressure roller 222 is rotatably mounted on the rotating frame 221. The two sets of pressure springs 223 are respectively mounted at both ends of the rotating frame 221. One end of the pressure spring 223 is rotatably mounted on the rotating frame 221, and the other end of the pressure spring 223 is rotatably mounted on the mounting frame 1. The pressure roller 222 abuts against the traction roller 21. The pressure roller 222 is rotatably mounted on the rotating frame 221. Under the action of the pressure springs 223, the pressure roller 222 abuts against the traction roller 21, and the cotton sliver passes between the pressure roller 222 and the traction roller 21. The two sets of pressure springs 223 act on both ends of the rotating frame 221, so that the pressure roller 222 maintains pressure on the traction roller 21.

[0038] Reference Figure 4 and Figure 5 The cross-section of one end of the drawing bundle 32 is flat, and the width of one end of the drawing bundle 32 matches the width of the traction roller 21; the cross-section of the other end of the drawing bundle 32 is circular, and the diameter of the other end of the drawing bundle 32 matches the diameter of one end of the output bundle 34; a bundle channel 321 is formed inside the drawing bundle 32, and the bundle channel 321 gradually narrows along the width direction from one end of the drawing bundle 32 to the other end of the drawing bundle 32; a cavity 322 is provided in the wall of the drawing bundle 32, and a partition 3221 is provided in the cavity 322 of the wall of the drawing bundle 32, the partition 3221 holding the drawing bundle 32... The cavity 322 of the wall is divided into a heating zone 3222 and a discharge zone 3223. Multiple sets of discharge holes 3224 are provided on the inner wall of the traction bundler 32, and the discharge holes 3224 are connected to the discharge zone 3223. The traction bundler 32 is provided with a discharge pipe 323, and a negative pressure port 3231 is provided on the side of the discharge pipe 323. The discharge pipe 323 is connected to the discharge zone 3223 through the negative pressure port 3231. One end of the discharge pipe 323 is connected to the other end of the air supply mechanism 42. A heating coil 3225 is provided in the heating zone 3222. The heating coil 3225 is used to maintain the inner wall temperature of the bundle channel 321 within the temperature range of the cotton wax softening point.

[0039] Reference Figure 4 and Figure 5The drafting and bundling device 32 has a flat cross-section at one end near the traction unit 2, and its width matches the width of the traction roller 21. It receives multiple parallel cotton slivers conveyed by the traction roller 21. The cross-section at the other end of the drafting and bundling device 32 away from the traction unit 2 is circular, matching the inlet diameter of the exit bundling device 34. The drafting and bundling device 32 has a bundling channel 321 inside, which forms a gradual convergence. After the cotton sliver enters, it is gradually squeezed and gathered into a circular cross-section cotton sliver under the constraint of the bundling channel 321, completing the bundling and initial shaping of the multiple cotton slivers. The drafting and bundling device 32 has a cavity 322 inside its wall, which is divided into a heating zone 3222 and a discharge zone 3223 by a partition 3221. A heating coil 3225 is arranged in the heating zone 3222. 5. When energized, the temperature of the inner wall of the bundle channel 321 is raised and maintained within the temperature range of the cotton wax softening point; the cotton wax, grease, and short fibers adhering to the inner wall of the bundle channel 321 are melted by the heat; the discharge area 3223 is connected to multiple sets of discharge holes 3224 on the inner wall of the bundle channel 321; the stretching bundler 32 is provided with a discharge pipe 323, which is connected to the discharge area 3223 through the negative pressure port 3231 on the discharge pipe 323; at the same time, one end of the discharge pipe 323 is connected to the air supply mechanism 42; the airflow formed by the air supply mechanism 42 in the discharge pipe 323 passes through the negative pressure port 3231, and draws the melted cotton wax, grease, and attached fibers into the discharge pipe 323 through the discharge holes 3224 and the discharge area 3223; then the air supply mechanism 42 generates a positive airflow to blow the molten dirt and impurities drawn into the discharge pipe 323 outward in a timely manner.

[0040] The drive mechanism 41 includes a first sprocket 411, a second sprocket 412, a transmission chain 413, and a drive rod 414. The first sprocket 411 is fixedly connected to one end of the traction roller 21, the second sprocket 412 is rotatably mounted on the mounting frame 1, and the transmission chain 413 is sleeved on the first sprocket 411 and the second sprocket 412. The first sprocket 411 drives the second sprocket 412 to rotate through the transmission chain 413. One end of the drive rod 414 is rotatably mounted on one side of the end face of the second sprocket 412, and the other end of the drive rod 414 is rotatably mounted on the air supply mechanism 42. The air supply mechanism 42 includes a piston cylinder 421, a piston rod 422, and a piston block 423. The piston cylinder 421 is fixedly installed inside the housing 31, the piston block 423 is slidably installed inside the piston cylinder 421, and one end of the piston rod 422 is fixedly installed on the piston block 423; the other end of the piston rod 422 passes through the piston cylinder 421 and the housing 31, and the piston rod 422 is slidably connected to the piston cylinder 421 and the housing 31; the other end of the piston rod 422 is rotatably connected to the other end of the drive rod 414; an air outlet 4211 is provided at the top of the piston cylinder 421; one end of the air guide pipe 424 is connected to the air outlet 4211, and the other end of the air guide pipe 424 is connected to one end of the discharge pipe 323.

[0041] Reference Figure 1 , Figure 3 and Figure 5 The drive mechanism 41 is driven by the rotational power of the traction roller 21, which in turn drives the air supply mechanism 42 to perform a reciprocating piston motion. Airflow is generated during the reciprocating stroke of the piston rod 422. The pull-back stroke generates negative pressure suction, and the push-out stroke generates suction while simultaneously purging the discharge pipe 323. When the traction roller 21 rotates, the first sprocket 411 rotates synchronously, driving the second sprocket 412 to rotate continuously via the transmission chain 413. The drive rod 414, eccentrically positioned at the end face of the second sprocket 412, moves in a circular motion with the sprocket, forming a crank-slider mechanism. The piston rod 422 and piston block 423 are pulled to perform axial reciprocating linear motion within the piston cylinder 421. When the piston rod 422 is pulled outward by the drive rod 414, the piston block 423 moves accordingly, increasing the volume of the piston cylinder 421 and creating negative pressure. This negative pressure is transmitted through the air guide pipe 424 to the discharge pipe 323 and acts on the discharge area 3223 within the wall of the stretching and gathering device 32 through the negative pressure port 3231 on the discharge pipe 323. This creates negative pressure suction at the discharge area 3223 and the discharge port 3224, drawing the gathering channel... Impurities such as cotton wax, oil stains, and short fibers melted by the heating coil 3225 on the inner wall of cylinder 321 are drawn into the discharge hole 3224, enter the discharge zone 3223, and flow into the discharge pipe 323, completing the impurity suction and recovery. When the piston rod 422 is pushed inward by the drive rod 414, the piston block 423 moves forward, the internal volume of the piston cylinder 421 decreases, and a positive pressure airflow is formed. The positive pressure airflow enters the discharge pipe 323 through the air guide pipe 424, which strongly blows away the molten impurities and short fibers collected in the discharge pipe 323, pushing them outward. Simultaneously, a high-speed airflow passes through the negative pressure port 3231, creating a negative pressure effect again in the discharge area 3223. This continues to draw in the debris remaining on the inner wall of the bundle channel 321 to the discharge area 3223 and the discharge pipe 323, achieving continuous cleaning by simultaneously blowing air out and suctioning under negative pressure. The second sprocket 412 rotates continuously, causing the piston rod 422 to reciprocate without interruption. Combined with the continuous softening of the cotton wax by the heating coil 3225, this ensures timely removal of debris from the inner wall of the stretching bundler 32, preventing blockage of the bundle channel 321.

[0042] Reference Figure 1 and Figure 3An antistatic assembly 5 is provided on one end of the drawing bundle 32. The antistatic assembly 5 includes a liquid storage tank 51, a liquid guiding hose 52, a fixing bracket 53, and a porous ceramic rod 54. The liquid storage tank 51 is fixedly installed on the top of the housing 31. The fixing bracket 53 is located above one end of the drawing bundle 32 and is slidably installed on the housing 31. The porous ceramic rod 54 is fixedly installed on the fixing bracket 53. One end of the liquid guiding hose 52 is connected to the liquid storage tank 51, and the other end of the liquid guiding hose 52 is connected to the porous ceramic rod 54. An antistatic component 5 is provided on one end of the stretching and assembling device 32. The antistatic component 5 includes a liquid storage tank 51, a liquid guiding hose 52, a fixing bracket 53, and a porous ceramic rod 54. The liquid storage tank 51 is fixedly installed on the top of the housing 31. The fixing bracket 53 is located above one end of the stretching and assembling device 32 and is slidably installed on the housing 31. The porous ceramic rod 54 is fixedly installed on the fixing bracket 53. One end of the liquid guiding hose 52 is connected to the liquid storage tank 51. The other end of the liquid guiding hose 52 is connected to the porous ceramic rod 54.

[0043] Reference Figure 1 and Figure 3 The liquid storage tank 51 is fixed to the top of the housing 31. The tank contains an antistatic agent and, under the influence of gravity and liquid pressure, continuously supplies liquid to the porous ceramic rod 54 via the liquid guide hose 52. The fixed bracket 53 is slidably mounted on the housing 31, allowing adjustment of the height and position of the porous ceramic rod 54, positioning it close to the cotton strip at the inlet end of the traction bundler 32. The porous ceramic rod 54 has uniform micropores inside, through which liquid slowly seeps out and forms a uniform and stable thin liquid film on its surface. When multiple cotton strips are high-speed conveyed by the traction roller 21 and fed into… When the cotton sliver enters the drawing and bundling device 32, the high-speed movement of the cotton sliver drives the formation of a boundary layer airflow around it. This airflow sweeps across the lower surface of the porous ceramic rod 54, exerting a shearing effect on the liquid film, breaking it up and atomizing it into extremely fine droplets. The fine droplets are carried by the airflow and uniformly adhere to the surface of the cotton sliver. By forming a hygroscopic and conductive film on the fiber surface, the surface resistance of the fiber is reduced, and the static charge generated by the cotton sliver during high-speed friction and transport is neutralized and dissipated. This achieves the effect of eliminating static electricity, preventing the fiber from adsorbing fly shavings and wrapping around the inner wall of the drawing and bundling device 32 due to static electricity, and ensuring that the cotton sliver smoothly enters the bundling channel 321.

[0044] Reference Figure 4 and Figure 5The size of one end of the sliver sliver bundler 34 is adapted to the diameter of the other end of the drafting bundler 32; the cross-section of the other end of the sliver sliver bundler 34 is circular, and the diameter of the other end of the sliver sliver bundler 34 is smaller than that of the first end of the sliver sliver bundler 34; a compaction channel 341 is formed inside the sliver sliver bundler 34, and the compaction channel 341 gradually narrows radially from one end of the sliver sliver bundler 34 to the other end of the sliver sliver bundler 34; the diameter of one end of the sliver sliver bundler 34 is adapted to the diameter of the other end of the drafting bundler 32, and is used to receive the initial bundled sliver output from the drafting bundler 32; the cross-section of the other end of the sliver bundler 34 is circular, and the sliver... The diameter of the other end of the sliver bundler 34 is smaller than the diameter of one end of the sliver bundler 34. The sliver bundler 34 forms a compaction channel 341 that gradually contracts radially along the conveying direction. During operation, the circular cotton sliver initially bundled by the stretching bundler 32 enters the compaction channel 341. Due to the gradual radial contraction of the compaction channel 341, the cotton sliver is subjected to continuous and uniform radial constraint and compression within the channel, causing the fibers to further converge and bind together, and continuously improving the density and roundness of the cotton sliver. Through the progressively contracting compaction channel 341, the cotton sliver is further shaped and tightened, forming a finished cotton sliver with a uniform diameter, tight structure, and smooth surface.

[0045] Reference Figure 4 and Figure 5 The coiling device 36 includes a coiling disc 361 and a rotating base 362. The coiling disc 361 is rotatably mounted in the upper part of the housing 31. A spiral inclined tube 3611 is provided inside the coiling disc 361. One end of the spiral inclined tube 3611 is located at the center of the top of the coiling disc 361, and the other end is located at an eccentric position at the bottom of the coiling disc 361. A feed pipe 3612 is fixedly provided at the center of the top of the coiling disc 361. The feed pipe 3612 is connected to the spiral inclined tube 3611. Pipe 3611 is connected; a first motor 363 is installed inside the housing 31, and a transmission belt is installed between the first motor 363 and the feed pipe 3612; the working end of the first motor 363 is connected to the feed pipe 3612 through the transmission belt, and the first motor 363 provides power for the rotation of the coil disc 361; a second motor 364 is installed at the bottom inside the housing 31, and a rotating base 362 is fixedly installed at the working end of the second motor 364, and the second motor 364 provides power for the rotation of the rotating base 362.

[0046] Reference Figure 4 and Figure 5The first motor 363 is fixed inside the housing 31. The first motor 363 drives the feed pipe 3612 to rotate via a transmission belt, and the feed pipe 3612 drives the coiling disc 361 to rotate synchronously. The coiling disc 361 has a spiral inclined tube 3611 inside. One end of the spiral inclined tube 3611 is located at the top center of the coiling disc 361 and is connected to the feed pipe 3612, and the other end is located at the bottom eccentric position of the coiling disc 361. The pressed cotton sliver enters the spiral inclined tube 3611 through the feed pipe 3612. Under the action of the rotation of the coiling disc 361, the cotton sliver passes through the eccentric end of the inclined tube. The circular rotation motion forms a ring-shaped coiling trajectory; the second motor 364 at the bottom of the housing 31 drives the rotating base 362 to rotate continuously, and the cotton sliver tube is placed on the rotating base 362 and rotates synchronously with it; the rotational motion of the coiling disc 361 and the rotational motion of the rotating base 362 are coordinated to make the cotton sliver coiled in an orderly manner inside the cotton sliver tube; by driving the coiling disc 361 and the rotating base 362 respectively by the first motor 363 and the second motor 364, the matching relationship between the coiling speed and the base speed is adjusted to ensure that the cotton sliver is stacked neatly and with consistent density, so as to achieve stable and efficient coiling and storage.

[0047] The working principle of the multi-strand cotton sliver bundling and combining device in this application is as follows: Multi-strand cotton slivers are guided by the feeding assembly 22 and smoothly fed in under the elastic clamping of the pressure roller 222 and the traction roller 21. The pressure spring 223 keeps the pressure roller 222 in contact with the traction roller 21 at all times. Multiple sets of traction rollers 21 rotate synchronously under the drive of the drive motor, forming multi-stage segmented traction, which uniformly and stably feeds the cotton slivers into the drawing and bundling device 32 of the forming unit 3. The inlet of the drawing and bundling device 32 is flat and matches the width of the traction roller 21, used to receive multiple parallel cotton slivers. The bundling channel 321 inside the drawing and bundling device 32 gradually contracts along the conveying direction, causing the cotton slivers to gradually gather from a flat cotton web into a circular cross-section, completing the initial bundling. Simultaneously, the wall of the drawing and bundling device 32... The heating coil 3225 in the heating zone 3222 is energized and heats up, maintaining the temperature of the inner wall of the bundle channel 321 within the softening point of the cotton wax, causing impurities such as cotton wax and short fibers adhering to the inner wall to melt. The traction roller 21 closest to the strip unit 3 drives the drive mechanism 41 to operate. The first sprocket 411 rotates with the traction roller 21, driving the second sprocket 412 to rotate through the transmission chain 413, causing the eccentrically hinged drive rod 414 to perform circular motion, which in turn pushes the piston rod 422 and piston block 423 of the air supply mechanism 42 to reciprocate linearly within the piston cylinder 421. When the piston block 423 moves backward, a negative pressure is formed in the piston cylinder 421, which is discharged through the air guide pipe 424, the discharge pipe 323, and the negative pressure port 3231 into the discharge zone 322. 3. Suction is generated, drawing melted cotton wax, oil, and lint from the discharge port 3224 into the discharge area 3223 and into the discharge pipe 323. When the piston block 423 moves forward, a positive pressure airflow is formed in the cylinder, which powerfully blows away impurities in the discharge pipe 323 and discharges them outward. At the same time, the high-speed airflow creates a negative pressure again at the negative pressure port 3231, continuously entraining impurities in the bundle channel 321, achieving continuous cleaning through reciprocating suction and synchronous blowing, and preventing blockage of the bundle channel 321. The antistatic agent in the liquid storage tank 51 is delivered to the porous ceramic rod 54 through the liquid guiding hose 52, forming a uniform liquid film on the surface of the porous ceramic rod 54. The boundary layer airflow generated by the high-speed movement of the cotton swab sweeps across the surface of the ceramic rod, shearing and atomizing the liquid film into fine droplets and adhering to the cotton swab. On the surface, static electricity is neutralized and fly waste and fiber entanglement are reduced; the initially bundled cotton sliver is stably conveyed to the sliver bundler 34 by the bundler guide roller 33; the sliver bundler 34 has a radially gradually contracting compaction channel 341 inside, which further radially squeezes and gathers the cotton sliver, making the fibers more tightly bound and improving the density, roundness and uniformity of the cotton sliver; then the cotton sliver is compacted and shaped again by the pressing guide roller 35; the cotton sliver enters the coiler 36, and the first motor 363 drives the feed pipe 3612 and the coiling disc 361 to rotate through the transmission belt. The cotton sliver enters the spiral inclined tube 3611 through the feed pipe 3612 and is thrown out from the eccentric end of the spiral inclined tube 3611 to form a circumferential trajectory; the second motor 364 drives the rotating chassis 362 to drive the cotton sliver cylinder to rotate synchronously;The rotation of the coil 361, in coordination with the rotation of the sliver can, ensures that the sliver is wound in an orderly fashion within the sliver can along a regular trajectory.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for bundling and combining multi-strand cotton slivers, characterized in that: The assembly includes a mounting frame (1), a traction unit (2), and a sliver forming unit (3); the sliver forming unit (3) is disposed at one end of the mounting frame (1), and the traction unit (2) is rotatably disposed on the mounting frame (1); the sliver forming unit (3) includes a housing (31), and inside the housing (31) along the conveying direction are arranged a drafting bundler (32), a bundle guide roller (33), an output bundler (34), a pressing guide roller (35), and a coiler (36); one end of the drafting bundler (32) is connected to the traction unit (2); the bundler... The guide roller (33) is located on one side of the other end of the drafting bundler (32). The bundler guide roller (33) is rotatably connected to the housing (31). One end of the sliver bundler (34) is located at the bundler guide roller (33). The sliver bundler (34) is fixedly connected to the housing (31). The pressing guide roller (35) is located at the other end of the sliver bundler (34). The pressing guide roller (35) is rotatably connected to the housing (31). One end of the coiler (36) is fixedly mounted on the housing (31) at the pressing guide roller (35).

2. The multi-strand cotton sliver bundling and combining device according to claim 1, characterized in that: The traction unit (2) includes multiple sets of traction rollers (21), which are evenly arranged on both sides of the mounting frame (1) in the horizontal direction. The traction rollers (21) are rotatably connected to the mounting frame (1). A cleaning assembly (4) is provided between the set of traction rollers (21) closest to the strip forming unit (3) and the housing (31). The cleaning assembly (4) includes a drive mechanism (41) and an air supply mechanism (42). One end of the drive mechanism (41) is fixedly disposed at one end of the traction roller (21), and the other end of the drive mechanism (41) abuts against one end of the air supply mechanism (42). The other end of the air supply mechanism (42) is connected to the stretching bundler (32). A feeding assembly (22) is rotatably disposed on the mounting frame (1) above the traction roller (21).

3. The multi-strand cotton sliver bundling and combining device according to claim 2, characterized in that: The cross-section of one end of the drawing bundle (32) is flat, and the width of one end of the drawing bundle (32) matches the width of the traction roller (21); the cross-section of the other end of the drawing bundle (32) is circular, and the diameter of the other end of the drawing bundle (32) matches the diameter of one end of the sliver bundle (34); a bundle channel (321) is formed inside the drawing bundle (32), and the bundle channel (321) gradually narrows along the width direction from one end of the drawing bundle (32) to the other end of the drawing bundle (32).

4. The multi-strand cotton sliver bundling and combining device according to claim 3, characterized in that: The drawing bundle (32) has a cavity (322) inside its wall. A partition (3221) is installed inside the cavity (322) of the drawing bundle (32) wall, dividing the cavity (322) into a heating zone (3222) and a discharge zone (3223). Multiple sets of discharge holes (3224) are provided on the inner wall of the drawing bundle (32). The discharge holes (3224) are connected to... The discharge zone (3223) is connected; the stretching bundler (32) is provided with a discharge pipe (323), the side of the discharge pipe (323) is provided with a negative pressure port (3231), the discharge pipe (323) is connected to the discharge zone (3223) through the negative pressure port (3231), and one end of the discharge pipe (323) is connected to the other end of the gas supply mechanism (42); a heating coil (3225) is provided in the heating zone (3222).

5. The multi-strand cotton sliver bundling and combining device according to claim 4, characterized in that: The drive mechanism (41) includes a first sprocket (411), a second sprocket (412), a transmission chain (413), and a drive rod (414); the first sprocket (411) is fixedly connected to one end of the traction roller (21), the second sprocket (412) is rotatably mounted on the mounting frame (1), and the transmission chain (413) is sleeved on the first sprocket (411) and the second sprocket (412); the first sprocket (411) drives the second sprocket (412) to rotate through the transmission chain (413); one end of the drive rod (414) is rotatably mounted on one side of the end face of the second sprocket (412), and the other end of the drive rod (414) is rotatably mounted on the air supply mechanism (42).

6. The multi-strand cotton sliver bundling and combining device according to claim 5, characterized in that: The gas supply mechanism (42) includes a piston cylinder (421), a piston rod (422), a piston block (423), and a gas guide pipe (424); the piston cylinder (421) is fixedly disposed inside the housing (31), the piston block (423) is slidably disposed inside the piston cylinder (421), and one end of the piston rod (422) is fixedly disposed on the piston block (423); the other end of the piston rod (422) passes through the piston cylinder (421) and the gas guide pipe (424). The housing (31) is slidably connected to the piston rod (422), the piston cylinder (421), and the housing (31); the other end of the piston rod (422) is rotatably connected to the other end of the drive rod (414); the piston cylinder (421) is provided with an air outlet (4211) at the top; one end of the air guide pipe (424) is connected to the air outlet (4211), and the other end of the air guide pipe (424) is connected to one end of the discharge pipe (323).

7. The multi-strand cotton sliver bundling and combining device according to claim 3, characterized in that: An antistatic assembly (5) is provided on one end of the stretching bundle (32). The antistatic assembly (5) includes a liquid storage tank (51), a liquid guiding hose (52), a fixed bracket (53), and a porous ceramic rod (54). The liquid storage tank (51) is fixedly installed on the top of the housing (31). The fixed bracket (53) is located above one end of the stretching bundle (32) and is slidably installed on the housing (31). The porous ceramic rod (54) is fixedly installed on the fixed bracket (53). One end of the liquid guiding hose (52) is connected to the liquid storage tank (51). The other end of the liquid guiding hose (52) is connected to the porous ceramic rod (54).

8. The multi-strand cotton sliver bundling and combining device according to claim 1, characterized in that: The size of one end of the sliver bundler (34) is adapted to the diameter of the other end of the drawing bundler (32); the cross-section of the other end of the sliver bundler (34) is circular, and the diameter of the other end of the sliver bundler (34) is smaller than that of one end of the sliver bundler (34); a compaction channel (341) is formed inside the sliver bundler (34), and the compaction channel (341) gradually shrinks radially from one end of the sliver bundler (34) to the other end of the sliver bundler (34).

9. The multi-strand cotton sliver bundling and combining device according to claim 1, characterized in that: The coiling device (36) includes a coiling disc (361) and a rotating base (362); the coiling disc (361) is rotatably disposed in the upper part of the housing (31); a spiral inclined tube (3611) is disposed inside the coiling disc (361), one end of the spiral inclined tube (3611) is disposed at the center of the top of the coiling disc (361), and the other end of the spiral inclined tube (3611) is disposed at an eccentric position at the bottom of the coiling disc (361); a feed pipe (3612) is fixedly disposed at the center of the top of the coiling disc (361), and the feed pipe (3612) and the spiral inclined tube (361) are connected. 1) Connected; a first motor (363) is provided inside the housing (31), and a transmission belt is provided between the first motor (363) and the feed pipe (3612); the working end of the first motor (363) is connected to the feed pipe (3612) through the transmission belt, and the first motor (363) provides power for the rotation of the coil disc (361); a second motor (364) is provided at the bottom inside the housing (31), and the rotating chassis (362) is fixedly installed at the working end of the second motor (364), and the second motor (364) provides power for the rotation of the rotating chassis (362).

10. A multi-strand cotton sliver bundling and combining device according to claim 2, characterized in that: The feeding assembly (22) includes a rotating frame (221), a pressure roller (222), and two sets of pressure springs (223). The upper part of the rotating frame (221) is rotatably mounted on a mounting frame (1) above the traction roller (21). The pressure roller (222) is rotatably mounted on the rotating frame (221). The two sets of pressure springs (223) are respectively mounted at both ends of the rotating frame (221). One end of the pressure spring (223) is rotatably mounted on the rotating frame (221), and the other end of the pressure spring (223) is rotatably mounted on the mounting frame (1). The pressure roller (222) abuts against the traction roller (21).