Flexible wear-resistant yarn and spinning device and method thereof

Abstract

The application provides a soft wear-resistant yarn and a spinning device and method thereof, wherein short fiber wide sliver is uniformly laid on a grid ring by using a negative pressure suction mechanism to obtain a negative pressure holding type short fiber with a certain width and a high parallel and uniform distribution of fibers on the grid ring; meanwhile, the distance between the core yarn and the short fiber wide sliver on the front roller is 2-5 mm, so that the core-spun yarn formed in the wrapping area is in a straight line with the core yarn conveyed to the grid ring and forms a "y" shape structure with the short fiber wide sliver conveyed to the grid ring, the fine denier flat core yarn rotates to form a uniform spiral structure, the core yarn rotation causes the core yarn, the wrapped yarn and the part of the short fiber wide sliver close to the core yarn to be twisted with each other, the spiral structure forms uniform pores with the wrapped yarn and the part of the short fiber wide sliver close to the core yarn, and a clamping type core layer structure with uniform spiral and pore and fluffiness is obtained; then the part of the short fiber wide sliver away from the core yarn is wrapped and wound on the core layer to obtain the soft wear-resistant yarn.

Description

Technical Field

[0001] This invention relates to the field of textile processing technology, and in particular to a soft and durable yarn, its spinning apparatus, and spinning method. Background Technology

[0002] With the continuous improvement of living standards, people have increasingly higher requirements for textiles, making the preparation of highly comfortable flexible fabrics a research hotspot. Furthermore, core-spun yarn, generally made by twisting together synthetic fiber filaments with good strength and elasticity as the core yarn with short fibers such as cotton, wool, and viscose fibers as the outer layer, is also known as composite yarn or covered yarn. It is a new type of yarn that combines the excellent properties of both filament core yarn and outer short fiber. Therefore, flexible and wear-resistant core-spun yarn is not only highly comfortable but also possesses the excellent properties and long service life of both the core yarn and the outer covering material, making it very popular.

[0003] Currently, ring spinning is a mainstream technology for producing core-spun yarn. Ring-spun core-spun yarn is produced by adding a filament feeding device to a conventional ring spinning machine. The filament is fed in from the center of the fiber sliver, and the short fiber sliver is twisted by the rotation of the air ring to wrap around the outside, forming a core-spun yarn. Patent application number CN202111337262.3 discloses a core-spun spinning device and a novel structure core-spun spinning method with full core coverage. This core-spun spinning device adds an auxiliary core-spun device between the front roller nip and the yarn guide hook of a conventional ring spinning machine. The auxiliary core-spun device includes a first yarn path for conveying the outer layer material, a second yarn path for conveying the core layer material, and a wrapping point for wrapping and converging. During the spinning process, short fiber slivers and filaments form a "Y"-shaped twisted structure with the filaments in a straight state. The filaments remain straight at the wrapping point, while the short fiber slivers wrap around the filaments at the wrapping point using the filaments' twisting rotation and their own partial twist, thus forming a core-spun yarn with good coverage. However, the core-spun yarn obtained by this device is produced by the core filament rotating and wrapping around the short fiber sliver. The yarn has a straight core filament as the core and a spirally wrapped short fiber sliver as the sheath, which makes it easy for the core filament and the outer covering fiber to slip and unravel. The interfacial bonding between the covering layer and the core filament is weak, resulting in poor abrasion resistance. At the same time, the softness of the obtained core-spun yarn needs to be improved.

[0004] In view of this, it is necessary to design an improved soft and abrasion-resistant yarn and its spinning device and method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a soft and durable yarn, its spinning apparatus, and spinning method. This apparatus overcomes the technical limitation that short fiber slivers need to accumulate before the wrapping zone after being drafted. It then utilizes a negative pressure suction mechanism to evenly spread the wide short fiber slivers onto a mesh ring, spreading them in both width and length directions. This results in negative pressure-held short fibers of a certain width, with parallel and uniform fiber height distribution on the mesh ring. Simultaneously, it ensures that the distance between the core yarn and the wide short fiber slivers on the front roller is 2-5 mm, so that the core-spun yarn formed in the wrapping zone is aligned with the core yarn conveyed to the mesh ring, and is also aligned with the conveying... The short, wide fibers on the mesh ring form a "Y"-shaped structure. The fine, flat core yarn rotates to form a uniform spiral structure. At the same time, the rotation of the core yarn causes the core yarn, the wrapping yarn, and the short, wide fibers near the core yarn to twist together, creating uniform pores between the spiral structure and the wrapping yarn and the short, wide fibers near the core yarn. This results in a spiral, uniformly pored, and fluffy core layer structure where the wrapping yarn and the core yarn hold the short, wide fibers near the core yarn. Then, the short, wide fibers away from the core yarn are further wrapped around the core layer under the rotation of the core yarn, resulting in a soft and durable yarn.

[0006] To achieve the above-mentioned objectives, the present invention provides a spinning device for soft and abrasion-resistant yarn, comprising a feeding unit, an auxiliary core-spun yarn unit, and a core-spun yarn winding unit;

[0007] The feeding unit includes a core / wrap filament feeding unit, a short fiber wide sliver feeding unit, and a front roller located at the input end of the auxiliary core / wrap filament unit; the core / wrap filament feeding unit simultaneously feeds fine denier flat core filaments and fine denier flexible wrap filaments that are spaced apart from each other; the wrap filaments are positioned within 1 / 2 the width of the short fiber wide sliver near the core filaments, and the distance between the core filaments and the short fiber wide slivers on the front roller is 2-5 mm;

[0008] The auxiliary core-wrapping unit includes a negative pressure adsorption component, a transmission gear, and a wrapping area for wrapping and converging; the negative pressure adsorption component includes a shaped plate, a transmission roller, and a mesh ring fitted on the outer surface of the shaped plate and the transmission roller; the shaped plate is provided with a negative pressure suction port, and a negative pressure suction mechanism is provided at the negative pressure suction port; the front roller, the transmission gear, and the transmission roller are meshed together;

[0009] The short-fiber wide sliver and the covering filament cross and converge with the core filament in the wrapping area to form a soft and abrasion-resistant yarn with a spiral structure in which the covering filament and the core filament clamp the part of the short-fiber wide sliver close to the core filament as the core and the part of the short-fiber wide sliver away from the core filament as the sheath. Then the soft and abrasion-resistant yarn is transferred to the core-spun yarn winding unit for twisting and winding.

[0010] As a further improvement of the present invention, the fine denier flat core filament is one of water-soluble fiber or non-water-soluble fiber, and the width of the single filament is 10-80μm; the fineness of the single filament of the wrapping filament is 0.3-1.0dtex.

[0011] As a further improvement of the present invention, the soft and abrasion-resistant yarn has a softness that is more than 20% higher than that of core-spun yarn of the same specification, an abrasion resistance that is more than 30% higher, and a minimum linear density of 2.1 tex.

[0012] As a further improvement of the present invention, the width of the negative pressure air intake is greater than or equal to the width of the short fiber sliver.

[0013] As a further improvement of the present invention, the soft and abrasion-resistant yarn formed through the wrapping area is in a straight line with the core yarn fed into the mesh ring, and merges with the short fiber wide sliver and wrapping yarn fed into the mesh ring to form a "y" shape;

[0014] The short, wide slivers fed into the front of the wrapping area are in a straight line.

[0015] As a further improvement of the present invention, an auxiliary conveying unit is also included, which is disposed above the negative pressure adsorption assembly; the auxiliary conveying unit includes a front roller, a drive roller, and a bridge component disposed between the front roller and the drive roller; the shaft of the front roller, the bridge component, and the shaft of the drive roller are connected; the front roller and the front roller are vertically correspondingly disposed, and the drive roller and the drive roller are vertically correspondingly disposed; the drive roller is in contact with the mesh ring.

[0016] As a further improvement of the present invention, the distance between the wrapping area and the front roller jaws is greater than the fiber length of the short fiber wide sliver.

[0017] As a further improvement of the present invention, the short fiber wide sliver feeding unit includes a bell mouth for feeding the short fiber wide sliver, a rear roller and a rear skin roller, and a middle roller and a middle skin roller.

[0018] The core / cover yarn feeding unit includes a yarn guide wheel for guiding the core yarn and the cover yarn;

[0019] The auxiliary core-spun yarn unit further includes a yarn guide rod disposed between the wrapping area and the core-spun yarn winding unit; the yarn guide rod has a first groove in the middle for positioning the core-spun yarn.

[0020] The core-spun yarn winding unit includes a yarn guide hook, a wire traveler, a steel ring, and a yarn tube. The core-spun yarn enters the air ring twisting section through the yarn guide hook. During this process, the fibers of the outer layer of the core-spun yarn are further twisted and tightened. Finally, the yarn is wound onto the yarn tube by the rotation of the wire traveler on the steel ring.

[0021] To achieve the above-mentioned objectives, the present invention also provides a method for spinning soft and abrasion-resistant yarn, which involves core-spun yarn using the spinning apparatus for soft and abrasion-resistant yarn described in any one of the above claims, specifically including the following steps:

[0022] S1′. The short wide fiber slivers, fine denier flexible wrapped filaments and fine denier flat core filaments arranged at intervals are fed from the feeding unit into the auxiliary core-wrapping unit;

[0023] S2′. The wrapped yarn is positioned within 1 / 2 the width of the short fiber wide sliver near the core yarn. The short fiber wide sliver is fed into the front nip formed by the engagement of the front roller and the front skin roller, maintaining a distance of 2-5 mm from the core yarn. It is then output to the mesh ring through the front nip. The short fiber wide sliver is held and attracted by the negative pressure suction mechanism at the negative pressure suction port and is evenly laid on the mesh ring with a certain width and fiber parallelism. The rotation of the core yarn drives the short fiber wide sliver and the wrapped yarn to wrap and wind around the outer layer of the core yarn in the wrapping area, forming a soft and wear-resistant yarn with a spiral structure in which the wrapped yarn and the core yarn clamp the part of the short fiber wide sliver near the core yarn as the core and the part of the short fiber wide sliver away from the core yarn as the sheath.

[0024] S3′. The soft and abrasion-resistant yarn is then twisted and wound by the core-spun yarn winding unit.

[0025] To achieve the above-mentioned objectives, the present invention also provides a soft and abrasion-resistant yarn, which is spun using the aforementioned soft and abrasion-resistant yarn spinning method.

[0026] The beneficial effects of this invention are:

[0027] (1) The spinning device for soft and wear-resistant yarn provided by the present invention feeds fine denier flat core yarn and fine denier flexible wrapping yarn at the same time through the wrapping / core yarn feeding unit. At the same time, it ensures that the wrapping yarn is set within 1 / 2 width of the short fiber wide sliver close to the core yarn. Then, the short fiber wide sliver is evenly spread on the grid ring by the negative pressure suction mechanism, and spread in the width and length directions. A negative pressure holding short fiber with a certain width, parallel fiber height and uniform distribution is obtained on the grid ring.

[0028] Simultaneously, ensure that the spacing between the core yarn and the short-fiber wide sliver / wrapping yarn overlap on the front roller is 2-5mm, so that the core-spun yarn formed in the wrapping area is in a straight line with the core yarn fed to the mesh ring, and forms a "Y"-shaped structure with the short-fiber wide sliver / wrapping yarn overlap fed to the mesh ring. The fine denier flat core yarn rotates to form a uniform spiral structure. At the same time, the rotation of the core yarn causes the core yarn, wrapping yarn, and the short-fiber wide sliver near the core yarn to twist together. The wrapping yarn and the short-fiber wide sliver near the core yarn reinforce the spiral structure formed by the rotation of the core yarn. At the same time, a uniform porosity is formed between the spiral structure and the wrapping yarn and the short-fiber wide sliver near the core yarn, resulting in a spiral, uniformly porosity, and fluffy clamped core layer structure in which the wrapping yarn and the core yarn clamp the short-fiber wide sliver near the core yarn. Then, the short-fiber wide sliver away from the core yarn is further wrapped and wound around the core layer under the action of the core yarn's rotation, resulting in a soft and wear-resistant yarn. First, the yarn core and outer sheath are more tightly and firmly bonded in this structure, eliminating the drawback of easy slippage between the core and outer sheath, thus increasing abrasion resistance. Second, the spiral, uniformly pored, and fluffy core structure significantly improves the softness of the yarn, resulting in a soft and abrasion-resistant yarn that is both abrasion-resistant and soft.

[0029] (2) Compared with yarns produced by conventional core-spun composite spinning under the same process parameters, the soft and abrasion-resistant yarn of the present invention has a softness improvement of more than 20% and an abrasion resistance improvement of more than 30%. The finest yarn spun by the spinning method of the present invention has a fineness of only 2.1 tex. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the spinning device for the soft and abrasion-resistant yarn of the present invention.

[0031] Figure 2 This is a diagram showing the connection relationship between the negative pressure adsorption component and the auxiliary conveying unit.

[0032] Figure 3 A path diagram for forming core-spun yarn from short fiber wide slivers, wrapped yarn, and core yarn.

[0033] Figure 4 for Figure 3 Composition diagram of medium-short fiber wide slivers.

[0034] Figure Labels

[0035] S1 - Short fiber wide sliver; F1 - Covered yarn; F2 - Core yarn; S3 - Soft and durable yarn; S11 - Short fiber wide sliver near the core yarn F2; S12 - Short fiber wide sliver away from the core yarn F2;

[0036] 10-Feeding unit; 11-Flare mouth; 12-Rear roller; 13-Rear leather roller; 14-Middle roller; 15-Middle leather roller; 16-Yarn guide roller; 17-Front roller;

[0037] 20-Auxiliary core-sleeving unit; 21-Negative pressure adsorption assembly; 22-Transmission gear; 23-Auxiliary conveying unit; 24-Yarn guide rod; 25-Wrapping area; 211-Shaped plate; 212-Transmission roller; 213-Mesh ring; 214-Negative pressure suction port; 231-Front roller; 232-Transmission roller; 233-Bridge component; 234-Second groove;

[0038] 30-Core-spun yarn winding unit; 31-Yarn guide hook; 32-Steel wire traveler; 33-Steel ring; 34-Fine yarn tube. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0041] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Please see Figures 1 to 4 As shown, the present invention provides a spinning device for soft and abrasion-resistant yarn, including a feeding unit 10, an auxiliary core-spun yarn unit 20, and a core-spun yarn winding unit 30.

[0043] The feeding unit 10 includes a core / wrap filament feeding unit, a short fiber sliver feeding unit, and a front roller 17 located at the input end of the auxiliary core-wrapping unit 20. The core / wrap filament feeding unit simultaneously feeds fine denier flat core filaments F2 and fine denier flexible wrap filaments F1, which are spaced apart from each other. The wrap filament F1 is positioned within half the width of the short fiber sliver S1 on the side closest to the core filament F2, and the distance between the core filament F2 and the short fiber sliver close to the core filament F2 on the front roller 17 is 2-5 mm. With this arrangement, the core filament F2 and the short fiber sliver S1 form a certain distance when passing through the front roller 17 and will not directly entangle, providing conditions for the smooth delivery of the short fiber sliver to the subsequent auxiliary core-wrapping unit 20, and also providing favorable conditions for the subsequent "Y"-shaped structure.

[0044] The auxiliary core-wrapping unit 20 includes a negative pressure adsorption component 21, a transmission gear 22, and a wrapping area 25 for wrapping and converging; the negative pressure adsorption component 21 includes a shaped plate 211, a transmission roller 212, and a mesh ring 213 fitted on the outer surface of the shaped plate 211 and the transmission roller 212; the shaped plate 211 is provided with a negative pressure suction port 214, and a negative pressure suction mechanism is provided at the negative pressure suction port 214; the front roller 17, the transmission gear 22, and the transmission roller 212 are meshed together. The short-fiber wide sliver S1, fed into the front roller 17, is conveyed onto the mesh ring 213. Simultaneously, the front roller 17 rotates, driving the transmission gear 22 to rotate, which in turn drives the transmission roller 212 to rotate, and consequently, the mesh ring 213 on the surface of the transmission roller 212 to rotate. This conveys the short-fiber wide sliver S1 to the negative pressure suction port 214. Through the suction and stretching effect of the negative pressure suction port 214, the short-fiber wide sliver S1 is evenly spread on the mesh ring 213 with a certain width and fiber parallelism. Next, under the continuous conveying of the mesh ring 213, the short-fiber wide sliver finally merges with the core yarn F2 and the wrapping yarn F1 output from the front roller 17 at the wrapping area 25. The twisting effect created by the rotating air ring causes the core yarn F2 to rotate, driving the short-fiber wide sliver S1 and the wrapping yarn F1 to wrap around the outer layer of the core yarn F2 to form a soft and abrasion-resistant yarn S3. Then, the soft and abrasion-resistant yarn S3 is transferred to the core-spun yarn winding unit 30 for twisting and winding.

[0045] Specifically, the fine denier flat core filament F2 rotates to form a uniform spiral structure. At the same time, the rotation of core filament F2 causes core filament F2, wrapping filament F1, and short wide slivers S11 near core filament F2 to twist together. Wrapping filament F1 and short wide slivers S11 near core filament F2 reinforce and fix the spiral structure formed by the rotation of core filament F2. At the same time, a uniform pore is formed between the spiral structure and wrapping filament F1 and short wide slivers S11 near core filament F2, resulting in a spiral, uniformly pored, and fluffy core layer structure in which wrapping filament F1 and core filament F2 hold the short wide slivers S11 near core filament F2. Then, the short wide slivers S12 away from core filament F2 are further wrapped around the core layer under the rotation of core filament F2, resulting in soft and wear-resistant yarn S3. During this process, the uniformly laid short-fiber wide sliver S1 is adsorbed onto the mesh ring 213 without rotating. Subsequently, the short-fiber wide sliver S1 is wrapped by the core yarn F2 and the wrapping yarn F1 to form a soft and wear-resistant yarn S3 with a special structure.

[0046] The width of the single filament in the fine denier flat core filament F2 is 10-80μm. By controlling the width of the core filament F2 within a relatively fine range, on the one hand, the spiral structure formed by the rotation of the core filament F2 is more compact and uniform, thus making the core layer structure more uniform and stable; on the other hand, the fineness of the resulting core-spun yarn is controlled within a relatively fine range, thus giving the soft and abrasion-resistant yarn S3 high softness and abrasion resistance.

[0047] The core fiber F2 is either a water-soluble fiber or a non-water-soluble fiber. When the core fiber F2 is a water-soluble fiber, the soft and abrasion-resistant yarn S3 is washed and the core fiber F2 is dissolved and removed to form a hollow structure, which makes the core layer structure more fluffy and the resulting yarn softer.

[0048] The fineness of the single filament in the fine denier flexible covered yarn F1 is 0.3-1.0 dtex. First, controlling the width of the covered yarn F1 within a relatively fine range not only makes the widths of the covered yarn F1 and the core yarn F2 more matched, but also makes the winding of the covered yarn F1 and the core yarn F2 stronger, increasing abrasion resistance; it also further controls the fineness of the resulting core-spun yarn within a relatively fine range. Second, the covered yarn F1 is flexible, which, while reinforcing the helical structure of the core layer, does not restrict the helical structure, thus not affecting the torsion of the helical structure, and consequently not affecting the softness of the resulting soft and abrasion-resistant yarn S3.

[0049] The short fiber wide sliver S1 fed onto the front roller 17 is spread out. The width of the short fiber wide sliver S1 is also controlled within a certain range to ensure wrapping without over-wrapping, thereby improving the softness of the soft and abrasion-resistant yarn S3.

[0050] In some embodiments, the width of the negative pressure suction port 214 is greater than or equal to the width of the short fiber wide sliver S1, causing the short fiber wide sliver S1 to stretch in both longitudinal and transverse directions, resulting in a more uniform thickness and even spreading. Simultaneously, the short fiber wide sliver S1 is subjected to tensile force in the conveying direction, straightening individual fibers. Under the synergistic stretching of the two forces in the width and length directions, the short fiber wide sliver S1 is neither excessively stretched into gaps nor broken. Ultimately, a fiber layer of a certain width, with parallel and uniformly distributed fiber height, is obtained on the mesh ring 213. Therefore, during the wrapping process, the wrapping is more uniform and thinner, resulting in a finer yarn with a uniform spiral structure. Furthermore, the negative pressure suction port 214 can also capture uncontrolled floating fibers in the short fiber wide sliver S1 and the second short fiber wide sliver S2.

[0051] The negative pressure suction port 214 has one of two structures: a top and bottom equal width structure or a top narrow and bottom wide structure. Preferably, the negative pressure suction port 214 has a top narrow and bottom wide structure, that is, the end of the negative pressure suction port 214 closer to the feeding unit 10 is narrower (but still not less than the width of the short fiber wide sliver S1 conveyed by the front roller 17), and the end farther away from the feeding unit 10 is wider. This setting allows the short fiber wide sliver S1 on the mesh ring 213 to be laid flatter, thinner, and more uniform, thereby making the spiral structure and outer wrapping structure of the resulting soft and wear-resistant yarn S3 more uniform and its performance better.

[0052] In particular, such as Figure 3As shown, the soft and abrasion-resistant yarn S3 formed by the wrapping area 25 is in a straight line with the core yarn F2 conveyed to the mesh ring 213, and together with the short fiber wide sliver S1 and the wrapping yarn F1 conveyed to the mesh ring 213, they form a "y" shaped structure. With this setup, since the soft, abrasion-resistant yarn S3, which is fed upwards, and the core yarn F2, which is conveyed to the mesh ring 213, are in a straight line, the twist generated by the rotation of the air ring is transmitted from bottom to top to the wrapping area 25. Then, most of the twist is transmitted to the core yarn F2, making the twist and tension of the core yarn F2 much greater than that of the short fiber wide sliver S1. This makes the core yarn F2 dominant in the twisting process, providing it with enough power to rotate and keeping it straight. Only a small portion of the twist is transmitted to the short fiber wide sliver S1. At the same time, the suction force of the negative pressure air inlet 214 on the short fiber wide sliver S1 further reduces the twist of the short fiber wide sliver S1, so that it is laid flat on the mesh ring 213 and is evenly wrapped around the core yarn F2 by the rotation of the core yarn F2.

[0053] The short fiber wide sliver S1 input before the wrapping zone 25 is in a straight line, which further hinders the twist transmission of the short fiber wide sliver S1, thereby reducing the twist and tension of the short fiber wide sliver S1 again.

[0054] The extension line of the core wire F2 fed into the mesh ring 213 before the wrapping area 25 is not on the same straight line as the fed core wire F2, so that the core wire F2 is fed into the mesh ring 213 in a zigzag form, which further increases the tension of the core wire F2 and provides auxiliary conditions to ensure that the core wire F2 is in a straight state at the wrapping area 25, thereby improving the wrapping effect.

[0055] In some embodiments, the distance between the wrapping area 25 and the nip of the front roller 17 is greater than the fiber length of the short-fiber wide sliver S1. This configuration allows for several advantages: firstly, individual fibers in the short-fiber wide sliver S1 can be sufficiently stretched and straightened; secondly, the greater length further increases the twist and tension of the core filament F2, which is beneficial for the core filament F2 to rotate and wrap the short-fiber wide sliver S1; and thirdly, the high-speed rotation of the core filament F2 can also produce a certain drafting effect on the short-fiber wide sliver S1, further improving the yarn quality.

[0056] The spinning device for this soft, abrasion-resistant yarn also includes an auxiliary conveying unit 23 positioned above the negative pressure adsorption assembly 21. The auxiliary conveying unit 23 includes a front roller 231, a drive roller 232, and a bridging component 233 positioned between the front roller 231 and the drive roller 232. The shaft of the front roller 231, the bridging component 233, and the shaft of the drive roller 232 are connected. The bridging component 233 serves to fix the structure and position the rollers. Figure 2As shown, the front roller 231 is vertically aligned with the front roller 17, and the drive roller 232 is vertically aligned with the drive roller 212. The drive roller 232 contacts the mesh ring 213. The combined action of the drive roller 232 and the drive gear 22 drives the mesh ring 213 to rotate. This arrangement makes the transmission of the mesh ring 213 more stable, providing stable conditions for the wrapping process.

[0057] In some embodiments, the transmission roller 232 has a second groove 234 in the middle for the passage of soft and abrasion-resistant yarn S3; the width of the second groove 234 is less than the width of the mesh ring 213 and greater than one-third of the width of the transmission roller 232. With this configuration, the convex structures at both ends of the transmission roller 232 can more easily press down on the mesh ring 213 and drive it to rotate and transport; at the same time, the second groove 234 makes it easier for the soft and abrasion-resistant yarn S3 formed to pass between the transmission roller 232 and the mesh ring 213.

[0058] The auxiliary core-spun yarn unit 20 also includes a yarn guide rod 24 disposed between the wrapping area 25 and the core-spun yarn winding unit 30. The yarn guide rod 24 has a first groove in its middle for positioning the soft, abrasion-resistant yarn S3. The soft, abrasion-resistant yarn S3 passes through the first groove in the middle of the yarn guide rod 24, positioning the yarn path. Specifically, the left and right movement of the yarn guide rod 24 can adjust the offset of the core yarn F2 path, thereby adjusting the "Y"-shaped structure; the up and down movement of the yarn guide rod 24 perpendicular to the yarn path can not only adjust the tension of the soft, abrasion-resistant yarn S3 on the mesh ring 213, but also eliminate the yarn lateral movement caused by the air ring, making the core-spun yarn twisting structure more stable, and can also adjust the tension and twist of the core yarn F2.

[0059] The short fiber wide sliver feeding unit includes a bell mouth 11, a rear roller 12 and a rear skin roller 13, a middle roller 14 and a middle skin roller 15 for feeding short fiber wide sliver S1; the core yarn feeding unit includes a guide roller 16 for guiding the core yarn F2 and the wrapping yarn F1.

[0060] The core-spun yarn winding unit 30 includes a yarn guide hook 31, a wire traveler 32, a steel ring 33, and a yarn tube 34. The core-spun yarn S3 enters the air ring twisting section through the yarn guide hook 31. During this process, the fibers of the outer layer of the core-spun yarn S3 are further twisted and tightened. Finally, it is wound onto the yarn tube 34 by the rotation of the wire traveler 32 on the steel ring 33.

[0061] The present invention also provides a method for spinning soft and abrasion-resistant yarn, which uses the above-mentioned soft and abrasion-resistant yarn spinning device for core-spun yarn, specifically including the following steps:

[0062] S1′. Short wide fiber slivers S1, fine denier flexible wrapped filaments F1 and fine denier flat core filaments F2, which are spaced apart from each other, are fed from the feeding unit 10 into the auxiliary core-wrapping unit 20 respectively;

[0063] S2′. The wrapped yarn F1 is placed within 1 / 2 of the width of the short fiber wide sliver S1 on the side close to the core yarn F2. The short fiber wide sliver S1 and the core yarn F2 are fed into the front nip formed by the engagement of the front roller 17 and the front skin roller 231 with a distance of 2-5mm. The short fiber wide sliver S1 is output to the mesh ring 213 through the front nip. The short fiber wide sliver S1 is attracted and held by the negative pressure suction mechanism at the negative pressure suction port 214 and is evenly laid on the mesh ring 213 with a certain width and fiber parallelism. The core yarn F2 rotates and drives the short fiber wide sliver S1 and the wrapped yarn F1 to wrap and wind around the outer layer of the core yarn F2 in the wrapping area 25 in sequence, forming a soft and wear-resistant yarn S3 with the spiral structure of the wrapped yarn F1 and the core yarn F2 holding the part of the short fiber wide sliver S11 close to the core yarn F2 as the core and the part of the short fiber wide sliver S12 away from the core yarn F2 as the sheath.

[0064] S3′. Soft and durable yarn S3 is then twisted and wound through a core-spun yarn winding unit 30.

[0065] This invention also provides a soft and abrasion-resistant yarn, obtained by spinning using the above-described spinning method. Compared with yarns produced by conventional core-spun composite spinning under the same process parameters, the soft and abrasion-resistant yarn S3 of this invention exhibits a softness improvement of over 20% and an abrasion resistance improvement of over 30%. The finest yarn of the soft and abrasion-resistant yarn obtained by the spinning method of this invention has a fineness of 2.1 tex.

[0066] The present invention will now be described in detail through several embodiments.

[0067] Example 1

[0068] A method for spinning soft and abrasion-resistant yarn involves core-spun yarn using a spinning device for soft and abrasion-resistant yarn. The specific process parameters for this core-spun yarn are as follows: core filament F2 is a viscose filament fiber with a single filament width of 80 μm; wrapping filament F1 is a nylon filament fiber with a fineness of 1.0 dtex; and short fiber wide sliver S1 is pure cotton fiber. The output speed of the short fiber wide sliver S1 from the front roller 17 is 9.48 m / min; the rotation speed of the spinning tube 34 is 11000 r / min; and the twist of the yarn is 80 T / 10 cm. The draft ratio (i.e., the draft ratio of the drafting unit to the short-fiber wide sliver S1) is 57.40; the linear density of the bast cotton fiber (i.e., the linear density of the roving after drafting) is 7.84 tex; the back zone draft (i.e., the ratio of the rotational linear speed difference between the roller and the middle roller) is 1.25; the spacing between the covering filament F1 and the core filament F2 on the front roller 17 is 6.5 mm, and the spacing between the core filament F2 and the short-fiber wide sliver S1 on the front roller 17 is 5 mm; the covering filament F1 is fed in slightly to the right of the center of the short-fiber wide sliver S1 (e.g., ...). Figure 3(As shown). For comparison, with other parameters unchanged, the covering yarn F1 and the core yarn F2 were overlapped and fed into the middle of the short fiber wide sliver S1 to form a traditional core-spun yarn. Test results show that compared with traditional core-spun yarn, the soft and abrasion-resistant yarn S3 produced by this invention has a 22% improvement in softness and a 30.1% improvement in abrasion resistance.

[0069] Example 2

[0070] A spinning method for a soft and abrasion-resistant yarn, compared to Example 1, differs in that the core filament F2 has a single filament width of 10 μm, the covering filament F1 has a fineness of 0.3 dtex, and the short fiber wide sliver S1 is a fine cashmere roving. The yarn prepared by this invention has a fineness of 2.1 tex, and exhibits good abrasion resistance and a smooth surface. For comparison, with other parameters unchanged, the covering filament F1 and the core filament F2 are overlapped and fed into the middle of the short fiber wide sliver S1 to form a traditional core-spun yarn. Test results show that traditional core-spun spinning cannot capture the very few short fibers on the outside for yarn formation. The final yarn is a twisted yarn with a tightly intertwined structure of the covering filament F1 and the core filament F2, and the softness of the yarn is significantly lower than that of the yarn of this invention.

[0071] In summary, this invention provides a soft and durable yarn, its spinning apparatus, and spinning method. A negative pressure suction mechanism evenly spreads short-fiber wide slivers onto a mesh ring, spreading them in both width and length directions. This results in short fibers of a certain width, with parallel and uniform fiber height distribution, held by negative pressure on the mesh ring. Simultaneously, it ensures that the distance between the core yarn and the short-fiber wide sliver on the front roller is 2-5 mm, so that the core-spun yarn formed in the wrapping zone is in a straight line with the core yarn conveyed to the mesh ring, forming a "..." with the short-fiber wide sliver conveyed to the mesh ring. The Y-shaped structure features a fine, flat core filament that rotates to form a uniform spiral structure. Simultaneously, the core filament's rotation causes the core filament, the wrapping filament, and the short, wide slivers near the core filament to twist together, creating uniform pores between the spiral structure and the wrapping filament and the short, wide slivers near the core filament. This results in a spiral, uniformly pored, and fluffy core layer structure where the wrapping filament and the core filament clamp the short, wide slivers near the core filament. Then, the short, wide slivers away from the core filament are further wrapped and wound around the core layer under the rotation of the core filament, resulting in a soft and durable yarn.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A spinning device for soft and durable yarn, characterized in that, Includes a feeding unit, an auxiliary core-spun yarn unit, and a core-spun yarn winding unit; The feeding unit includes a core / wrap filament feeding unit, a short fiber wide sliver feeding unit, and a front roller located at the input end of the auxiliary core / wrap filament unit; the core / wrap filament feeding unit simultaneously feeds fine denier flat core filaments and fine denier flexible wrap filaments that are spaced apart from each other; the wrap filaments are positioned within 1 / 2 the width of the short fiber wide sliver near the core filaments, and the distance between the core filaments and the short fiber wide slivers on the front roller is 2-5 mm; The auxiliary core-wrapping unit includes a negative pressure adsorption component, a transmission gear, and a wrapping area for wrapping and converging; the negative pressure adsorption component includes a shaped plate, a transmission roller, and a mesh ring fitted on the outer surface of the shaped plate and the transmission roller; the shaped plate is provided with a negative pressure suction port, and a negative pressure suction mechanism is provided at the negative pressure suction port; the front roller, the transmission gear, and the transmission roller are meshed together; The short fiber wide sliver and the wrapping filament cross and converge with the core filament at the wrapping area to form a soft and abrasion-resistant yarn with a spiral structure in which the wrapping filament and the core filament clamp the part of the short fiber wide sliver close to the core filament as the core and the part of the short fiber wide sliver away from the core filament as the sheath. Then the soft and abrasion-resistant yarn is transferred to the core-spun yarn winding unit for twisting and winding. The width of the negative pressure air intake is greater than or equal to the width of the short fiber sliver; The soft, abrasion-resistant yarn formed through the wrapping area is in a straight line with the core yarn fed into the mesh ring, and merges with the short, wide slivers and wrapping yarn fed into the mesh ring to form a "y" shape; The short, wide fiber strips fed into the front of the wrapping area are in a straight line; The distance between the wrapping area and the front roller jaws is greater than the fiber length of the short wide sliver.

2. The spinning apparatus for soft and abrasion-resistant yarn according to claim 1, characterized in that, The core filament, which is flat and fine-denier, is either a water-soluble fiber or a non-water-soluble fiber, with a single filament width of 10-80 μm; the single filament of the wrapping filament has a fineness of 0.3-1.0 dtex.

3. The spinning apparatus for soft and abrasion-resistant yarn according to claim 1, characterized in that, The soft and abrasion-resistant yarn has a softness that is more than 20% higher and an abrasion resistance that is more than 30% higher than that of core-spun yarn of the same specification, with a minimum linear density of 2.1 tex.

4. The spinning apparatus for soft and abrasion-resistant yarn according to claim 1, characterized in that, It also includes an auxiliary conveying unit disposed above the negative pressure adsorption assembly; the auxiliary conveying unit includes a front roller, a drive roller, and a bridge component disposed between the front roller and the drive roller; the shaft of the front roller, the bridge component, and the shaft of the drive roller are connected; the front roller and the front roller are vertically aligned, and the drive roller and the drive roller are vertically aligned; the drive roller is in contact with the mesh ring.

5. The spinning apparatus for soft and abrasion-resistant yarn according to claim 1, characterized in that, The short fiber wide sliver feeding unit includes a bell mouth, a rear roller and a rear skin roller, a middle roller and a middle skin roller for feeding the short fiber wide sliver; The core / cover yarn feeding unit includes a yarn guide wheel for guiding the core yarn and the cover yarn; The auxiliary core-spun yarn unit further includes a yarn guide rod disposed between the wrapping area and the core-spun yarn winding unit; the yarn guide rod has a first groove in the middle for positioning the core-spun yarn. The core-spun yarn winding unit includes a yarn guide hook, a wire traveler, a steel ring, and a yarn tube. The core-spun yarn enters the air ring twisting section through the yarn guide hook. During this process, the fibers of the outer layer of the core-spun yarn are further twisted and tightened. Finally, the yarn is wound onto the yarn tube by the rotation of the wire traveler on the steel ring.

6. A method for spinning soft and durable yarn, characterized in that, Core-spun yarn using the spinning apparatus for the soft, abrasion-resistant yarn as described in any one of claims 1 to 5 specifically includes the following steps: S1′. The short wide fiber slivers, fine denier flexible wrapped filaments and fine denier flat core filaments arranged at intervals are fed from the feeding unit into the auxiliary core-wrapping unit; S2′. The wrapped yarn is positioned within 1 / 2 the width of the short fiber wide sliver near the core yarn. The short fiber wide sliver is fed into the front nip formed by the engagement of the front roller and the front skin roller, maintaining a distance of 2-5 mm from the core yarn. It is then output to the mesh ring through the front nip. The short fiber wide sliver is held and attracted by the negative pressure suction mechanism at the negative pressure suction port, and is evenly laid on the mesh ring with a certain width and fiber parallelism. The rotation of the core yarn drives the short fiber wide sliver and the wrapped yarn to wrap and wind around the outer layer of the core yarn in the wrapping area, forming a soft and wear-resistant yarn with a spiral structure in which the wrapped yarn and the core yarn clamp the part of the short fiber wide sliver near the core yarn as the core and the part of the short fiber wide sliver away from the core yarn as the sheath. S3′. The soft and abrasion-resistant yarn is then twisted and wound by the core-spun yarn winding unit.

7. A soft and durable yarn, characterized in that, The yarn is obtained by spinning using the spinning method of the soft and abrasion-resistant yarn described in claim 6.

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