CN112877829A - Spinning method and device for spinning single yarn with folded yarn structure on ring spinning frame and yarn - Google Patents

Abstract

The invention relates to a method for processing single yarn with a plied yarn structure spun on a ring spinning frame, which adopts a group of twisting mechanisms arranged at the front ends of a front leather roller and a front roller, wherein the twisting mechanism consists of a twisting leather roller and a twisting roller which do both rotary motion and reciprocating motion, fibers arranged in parallel in a strand are twisted under the friction action of the twisting mechanisms to form pre-added twisting orientation, two bundles of pre-twisted ring spindle staple yarns after twisting treatment are output through a twisting jaw consisting of the twisting roller and the twisting leather roller, the two bundles of pre-twisted ring spindle staple yarns form convergent plying in a twisting triangular area under the twisting force of cohesive twisting and the torque force in the twisted and finished strand, thereby forming the single yarn with the plied yarn structure which is mainly double-stranded spiral and locally cohesive, increasing the yarn strength, wear resistance and flexibility, reducing the process flow of single yarn doubling and plying, and the application range is wide, the operation is convenient, and the large-area popularization and use are easy.

Description

Spinning method and device for spinning single yarn with folded yarn structure on ring spinning frame and yarn

Technical Field

The invention relates to the technical field of spinning, in particular to a spinning method and a spinning device for spinning a single yarn with a plied yarn structure on a ring spinning frame and the yarn.

Background

The ring spinning technology belongs to holding end spinning, is widely applied due to strong adaptability of raw materials and wide production variety range, but also has the defects of more yarn hairiness, insufficient strength, poor hand feeling, high difficulty of quality control, low efficiency and the like. In the traditional ring spinning twisting process, the twist is generated by the motion of a steel wire ring, and the twist is transmitted to a twisting point from bottom to top after being generated. In the twisting process, the fibers at the front roller plier mouth rotate around the strand axis, so that the width of the strand is gradually reduced, and the two sides are folded to form a twisting triangular area. In the twisting triangular area, the width and the cross section of the fiber strands are changed, the flat fiber strands are gradually formed into approximately cylindrical yarn strands, and finally the yarn for weaving is formed, so that the twisting triangular area is a key area in the yarn forming process, the geometrical form of the twisting triangular area directly influences the tension distribution and the tension distribution of internal fibers, the residual torque of the internal fibers and the hair of surface fibers are exposed, the structural characteristics of yarn forming are influenced, and the ring spindle single yarn with the characteristics of high strength, less hair and good yarn evenness and special double-strand fiber structural characteristics cannot be realized.

Aiming at overcoming the problems of more resultant yarn hairiness and insufficient strength, the compact spinning technology is developed rapidly in recent years and is characterized by drafting no bundling and bundling no drafting. The basic method is to add a set of fiber bundling device in front of the drafting device of the traditional ring spinning frame to increase the control of the fiber in the spinning triangle area, to make the drafted fiber bundle gather in the center of the yarn before entering the twisting area, to reduce the width of the fiber strand at the nip, to eliminate the spinning triangle area, to reduce the yarn hairiness obviously. Compared with the common ring yarn, the compact spinning yarn has obvious effects on the aspects of yarn strength, wear resistance improvement, hairiness reduction and the like, but also causes new problems of compact yarn, hard handfeel of the prepared fabric, high production energy consumption and the like. For example, chinese patent No. CN201410671777.0, published japanese patent No. 2015.2.4, entitled bundle of fibers in ring spinning processing, provides a bundle of fibers removing device with simple structure and no additional energy consumption, which utilizes rotary grooved pulley to gather and remold triangular regions, dynamically captures and gathers fibers on the surface of a sliver formed by twisting through sufficient internal and external transfer motions, thereby greatly improving the quality of finished yarn, but in actual production, the fibers will wrap the rotary grooved pulley to cause breakage, and the improvement of strength is not significant. Chinese patent No. CN1995510A, published by the name of 2007.7.11, discloses an ironing spinning method for improving yarn performance, and performs heat and humidity treatment on fibers in the spinning process, so that the fiber rigidity is reduced, the fibers are fully transferred inside and outside, and the generation of yarn hairiness is reduced. However, the devices are inconvenient to process and install, additional energy consumption is needed, certain potential safety hazards exist, and the method has no obvious effect on the non-heat-sensitive fibers. Meanwhile, the patents only can promote the yarn to be tightly wrapped through the cohesion of single gathered fibers so as to enhance the cohesion degree among the fibers to improve the strength, and do not change the arrangement structure of the fibers in the yarn body to regulate and control the strength.

In addition, some researches realize the construction of the different arrangement characteristics of the fibers on the inner layer and the outer layer of the yarn, and the yarn strength is regulated and controlled by a spinning method with different structures of the inner layer and the outer layer of the yarn. For example, chinese patent No. CN 201410105223.4, published japanese patent No. 2014.3.20, entitled method and apparatus for processing low-hairiness low-torque ring yarn, the invention relates to a method and apparatus for processing low-hairiness low-torque ring yarn, which uses a rotating airflow ejected from a nozzle to apply a reverse twist to the yarn to urge the surface layer yarn to partially turn over and wrap, thereby realizing the cross wrapping of the inner and outer layers by the forward and reverse twist to increase the yarn strength, but the method has high energy consumption, high operation precision, complex mechanism, and is difficult to realize mass production. In addition, the low-torque ring spinning method disclosed in the journal of textile science (journal of textile research) vol.34, No.6, 2013 of pottery Shiming et al utilizes 1 simple mechanical false twisting device (see fig. 1), thereby changing the arrangement of fibers in finished yarn, obviously reducing the residual torque of the yarn through internal balance, and realizing the phenomenon of non-coaxial special-shaped spiral line structure and local reversal of fiber segments. However, the false twister of the spinning method has the defects of large use problem and complex operation, and simultaneously, the yarn breakage is easy to occur in the spinning process, thereby influencing the production efficiency.

The sirospun composite yarn is prepared by respectively feeding, drafting, converging and twisting two or more components according to certain process parameters. The siro spinning technology is widely applied to the production of cotton spinning yarns due to good yarn structure, excellent quality and mature production technology, but the high-quality yarns have small occupation ratio and restrict the development of the high-quality yarns. In the spinning process, two single yarn strands output from a front roller at a certain space are converged at a convergence point and are twisted together by twisting action. During the process of transferring the twist from bottom to top, the process of wrapping and self-twisting similar to the same-direction twist twin-yarn is completed, namely, a part of twist enables two strands of single yarn to be mutually wrapped along the axial direction of the composite yarn to form a spiral structure; a part of the twist overcomes the convergent resistance to ensure that two single yarns obtain a small amount of true twist, so that the two single yarns form a homodromous spiral state with respective axes. In the final composite yarn, because two strands of single yarns only have a small amount of true twist, most twist is transmitted on the whole composite yarn, so that fibers are mutually transferred when the two strands of single yarns are gathered, the style of the plied yarn is damaged, and meanwhile, the fibers are in different-degree twisting and inclining states under the actions of mutual extrusion, entanglement and the like of the fibers, so that the double-winding spiral geometric shape of the finished yarn cannot be controlled and high-quality plied yarn structure yarns are difficult to form. The invention provides an isolated siro spinning device, which is called as an isolated siro spinning device by the Chinese patent No. CN101603217B, published by the No. 2010.11.10, and leads the yarn strips to be attached with hairiness when revolving in the groove of the isolated siro spinning device, thus leading the effect of yarn-forming compound yarn to be more obvious and the quality to be higher. Chinese patent No. CN101979733B, published by the name of 2010.11.15, discloses a method for producing hemp high-count yarns and folded yarns by siro spinning or sirofil spinning, wherein the hemp high-count folded yarns are obtained by reversely plying and twisting siro blended yarns to form folded yarns and then removing vinylon, or the hemp high-count folded yarns are obtained by reversely plying and twisting the blended yarns after removing the vinylon, but the hemp high-count folded yarns need to be subjected to post-treatment and are complex in operation and have no universality. Chinese patent No. CN106676689B, published by the name of 2016.11.14, discloses a compact siro spinning auxiliary device and a compact siro spinning method, and regulates the feeding position of roving through a bell mouth traversing mechanism, thereby reducing the abrasion of a leather roller and ensuring the yarn quality, but the method can not regulate the twisting and wrapping structure of fibers. However, the method for producing the low-torque yarn by using the siro spinning to produce the yarn with the plied yarn style has the advantages that the acting force of the false twister on the yarn is vertical to the moving direction of the yarn, so that the yarn evenness is greatly influenced, and the technical problems of low internal and external transfer degree of the fiber, poor fiber cohesion, low resultant yarn strength, more resultant yarn hairiness and the like in the yarn structure produced by the method still cannot be fundamentally solved, and meanwhile, the spinning process is complex, the mechanism cost is high, and the operation is inconvenient.

The mechanical property of the yarn is not only an important index for measuring the quality of the yarn, but also the subsequent production and processing quality and efficiency of the yarn are determined, so that the spun ring spun single yarn is generally difficult to meet the requirement of the subsequent weaving process due to the strength, and at the moment, the single yarn needs to be doubled and plied, two strands of single yarn are combined into the spiral double-strand or multi-strand structure yarn so as to greatly improve the strength of the yarn, but the doubling process increases the production cost and reduces the production efficiency, so that the novel structure yarn which meets the structural characteristics of the double strands and the strength of the finished yarn is directly spun on the ring spun yarn.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a spinning method and apparatus for spinning a single yarn with a plied yarn structure on a ring spinning frame, and a yarn, wherein the spinning method can increase the strength, wear resistance and flexibility of the yarn, reduce the technological process of single yarn doubling and plying, and has a wide application range.

In order to achieve the purpose, the technical solution of the invention is as follows:

a spinning method for spinning a single yarn with a plied yarn structure on a ring spinning frame comprises the following steps: two ring spindle short fiber strands are input into a twisting mechanism in parallel after being drafted for twisting treatment, the strands are subjected to reciprocating twisting and twisting movement under the transverse friction action of the twisting mechanism, pre-twisting degree is applied to the strands to form a sliver with fiber twisting orientation, and meanwhile, the twisting degree directions of two ends of the sliver are opposite; then two yarns twisted and twisted are output from the twisting mechanism, form a convergent ply in a twisting triangular area, and are wound on a yarn bobbin through a yarn guide hook and a steel wire ring in sequence.

Furthermore, when the twisting direction of the transverse moving twisting of the twisting mechanism is the same as the twisting direction of the ring spindle, the tension borne by the two fiber strands is obviously increased, the transfer of the fibers in the single-strand yarns is enhanced, the entanglement and cohesion of the yarns during gathering are enhanced, and the built-in rotary entanglement of the yarns of the formed plied yarn structure is tight; when the twisting direction of the transverse moving twisting of the twisting mechanism is opposite to the twisting direction of the ring spindle, the built-in torsion stress of the two converged single yarns is balanced with the torsion torque of the ring spindle twisting, the formed yarn with the folded yarn structure is smooth and soft, a twisting-free area with positive and reverse twisting turning exists in the turning process of the twisting mechanism, the fiber strands are output in a parallel twisting-free state and are converged in a siro spinning twisting triangular area, and the two fiber strands are integrally and internally and externally transferred to form a fiber buckling, twisting and clasping single yarn structure.

Meanwhile, the invention also provides a spinning device for realizing the spinning method for spinning the single yarn with the plied yarn structure on the ring spinning frame, wherein the spinning device comprises a front leather roller, a front roller, an upper sheath, a middle roller, a rear leather roller, a rear roller, a yarn guide hook, a steel wire ring and a bobbin.

Furthermore, the middle of the twisting leather roller is made of metal, and the surface of the twisting leather roller is made of rubber; the middle of the twisting roller is made of metal, and the surface layer is made of rubber or metal.

Furthermore, the traversing distance of the twisting mechanism is 1-5 cm, the traversing speed is 0.5-10 m/min, the reciprocating steering staggering frequency is 10-30 times/min, and the pressure between the twisting leather roller and the twisting roller is 100-200N.

Further, the twisting mechanism has three motion modes: the twisting roller and the twisting leather roller both do the movement of rotating and reciprocating transverse movement; the twisting roller only rotates, and the twisting leather roller rotates and reciprocates transversely; the twisting leather roller only rotates, and the twisting roller rotates and reciprocates transversely.

In addition, the invention also provides a yarn prepared by the spinning method for spinning the single yarn with the plied yarn structure on the ring spinning frame, and the yarn comprises a positive-twist plied yarn structure area, a reverse-twist plied yarn structure area and a ring-spindle twisting structure area, wherein the ring-spindle twisting structure area is connected between the positive-twist plied yarn structure area and the reverse-twist plied yarn structure area.

Due to the adoption of the technical scheme, compared with the prior art, the processing method for spinning the single yarn with the plied yarn structure on the ring spinning frame has the advantages that:

the twisting mechanism consists of the twisting leather roller and the twisting roller which do both rotary motion and reciprocating motion, and is used for holding and twisting two fiber strands which enter the twisting mechanism in parallel, so that the structure that the fibers in the traditional ring spinning yarn are arranged in a one-way twisting and clasping manner is changed, the two fiber strands which are arranged in parallel are overturned, entangled and clasped under the twisting friction action to form a twisted yarn strip with pre-twisting degree, and the fibers on the surface layer of the yarn strip are tightly gathered, and the orientation of the fibers in the yarn strip is increased. The pre-twisting degree of the two twisting yarns is dynamically self-adjusted and rearranged in the twisting process, the twisting degree of the two twisting yarns is not balanced at a convergence point, and the two yarns form a gradient spiral double-strand cohesion mode under the synergistic effect of ring spindle torque force and twisting yarn stress and tension, so that a ring spindle spinning single-yarn structure is changed, a double-strand structure which can be achieved by doubling two strands of single yarns is realized, and the yarn strength is greatly improved. Meanwhile, the twisting direction of the fibers is repeatedly switched and adjusted in the forward and reverse directions, the arrangement state of the fibers in the twisting sliver main body is changed, when the twisting direction of the twisting sliver is the same as that of the ring spindle, cohesion of the fibers in the yarns is enhanced, when the twisting direction of the twisting sliver is opposite to that of the ring spindle, the torque stress in the yarns is balanced, the twist degrees of the two twisting slivers are released when the twisting direction is changed, and the twisting slivers are converged in a twisting triangular area in a non-twisting state, so that a single yarn structure with a fiber strand main body twisting cohesion type internal and external transfer and fiber buckling twisting cohesion is formed, single yarn forming of a double-strand spiral type and local twisting cohesion type strand structure of the main body is realized, the strength, wear resistance and flexibility of the yarns are increased, and the technological process of forming the strands by doubling and plying. The invention is characterized in that two fiber strands are twisted and combined into a single yarn with a plied yarn structure, wherein the single yarn is formed by twisting and combining two fiber strands firstly and then twisting and combining two fiber strands together to form a single yarn with a plied yarn structure, and the single yarn integrates main body double-strand spiral type and local twisting and combining type, thereby reducing yarn hairiness, improving yarn strength and softness, inheriting the raw material universality and variety adaptability of the traditional ring spinning, and breaking through the structural characteristics of the ring spinning yarn. The invention has the advantages of convenient operation, no additional energy consumption, simple and clear mechanism and easy popularization and use.

Drawings

FIG. 1 is a schematic view of a processing method of a single yarn with a plied yarn structure spun on a ring spinning frame.

FIG. 2 is a schematic view of the structure of a single yarn of a ring spinning frame. In the figure: 1-twisting leather roller, 2-twisting roller, 3-front leather roller, 4-front roller, 5-sheathing, 6-middle roller, 7-back leather roller, 8-back roller, 9-fiber strand, 10-yarn guide hook, 11-steel wire loop, 12-yarn bobbin, 13-pre-twisting yarn strip, 131-Z pre-twisting yarn strip, 132-S pre-twisting yarn strip, 14-untwisted yarn strip, 15-same direction twisting zone, 16-reverse twisting zone, 17-untwisting zone, 18-positive strand structure zone, 19-reverse twisting strand structure zone and 20-ring twisting structure zone.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Referring to attached drawings 1-2, a processing method for spinning a single yarn with a folded yarn structure on a ring spinning frame is based on a four-roller ring spinning drafting mechanism, a set of twisting mechanisms arranged at the front ends of a front leather roller 3 and a front roller 4 are adopted, each twisting mechanism consists of a twisting leather roller 1 and a twisting roller 2 which do rotary motion and reciprocating motion, and the linear speeds of the twisting rollers 2 and the front roller 4 are kept the same. Two ring-spun staple fiber slivers 9 are unwound from a bobbin yarn package and parallelly enter a drafting zone consisting of a rear roller 8, a rear leather roller 7, an upper sheath 5 of a middle roller 6, a front roller 4 and a front leather roller 3, the drafting multiple of the rear zone is 1-3 times, the drafting multiple of the front zone is 10-100 times, two bundles of fiber slivers 9 which are parallelly output through the drafting zone enter a twisting mechanism, the traversing distance of the twisting mechanism is 1-5 cm, the traversing speed is 0.5-10 m/min, the reciprocating steering staggering frequency is 10-30 times/min, the pressure between the twisting leather roller 1 and the twisting roller 2 is 100-200N, wherein the middle of the twisting leather roller is made of metal, and the surface of the twisting leather roller is made of rubber; the middle of the twisting roller is made of metal, and the surface layer is made of rubber or metal. The fibers arranged in parallel in the fiber strand are twisted under the friction action of the twisting mechanism to form pre-added twisted orientation, meanwhile, in the twisting process, the twisting roller 2 and the twisting leather roller 1 can both rotate and reciprocate transversely, one of the twisting roller 2 and the twisting leather roller 1 can only rotate, and the other can rotate and reciprocate transversely, thus realizing twisting catching type aggregation on the surface layer fiber of the strand, rewinding the strand hairiness on the main body of the ring spun staple fiber yarn to eliminate the hairiness, outputting two bundles of pre-twisted ring spun staple fiber yarn after twisting treatment through a twisting jaw composed of a twisting roller 2 and a twisting leather roller 1, leading the two bundles of pre-twisted ring spun staple fiber yarn to be under the twisting force of clasping type twisting and the internal torque force of the strand after twisting and tidying, forming a converging strand in a twisting triangular area, and winding the strand on a bobbin 12 through a yarn guide hook 10 and a steel wire ring 11 in sequence;

during spinning, the front roller 4, the front leather roller 3, the twisting roller 2 and the twisting leather roller 1 are synchronously rotated at high speed, two bundles of drafted fiber strands 9 are parallelly output from a front jaw formed by meshing the front roller 4 and the front leather roller 3 and enter a twisting mechanism formed by pressing and attaching the twisting roller 2 and the twisting leather roller 1 in a parallel state, one end of the fiber strands 9 output from the front jaw is held by the front jaw, the other end of the fiber strands is controlled by a yarn guide hook 10, the fiber strands in the middle sections of the two holding points are held by the twisting roller 2 and the twisting leather roller 1 and perform reciprocating twisting type twisting motion under the action of traversing friction, the fiber strands are twisted by the twisting mechanism to form pre-twisted yarn strips 13 with fiber twisting orientation, two ends of the pre-twisted yarn strips 13 are opposite in the direction, namely one end of the pre-twisted yarn strips is S twisted, the other end of the pre-twisted yarn strips 13 are Z, and the two pre-twisted yarn strips 13 are output from the twisting mechanism, the twisting force of ring twisting is applied to make the yarns converge, because part of the yarns have twisting orientation, when the two pre-twisted yarns 13 are combined, the fibers in the two pre-twisted yarns 13 do not transfer between the two yarns, the fibers are twisted and clasped only in the single-stranded yarns, and converge in the form of doubling the two pre-twisted yarns 13 to form a single yarn with a spiral clasping twisting double-strand structure, and the other part of the yarns does not have twisting orientation untwisted yarns 14, and connect the single yarns with the two single yarns with the spiral clasping double-strand structure by using the single yarn structure with the spiral twisting clasping double-strand structure, so that the single yarn with the main body double-strand spiral type and local twisting clasping type strand structure is finally formed.

The yarn forming movement process is divided into three circulation stages, namely, a first stage, when the transverse moving twisting direction of the twisting mechanism is the same as the ring twisting direction, the yarn at the section forms a homodromous twisting area 15, the tension borne by the two fiber strands is obviously increased, the transfer of the fibers in the single-strand strands is enhanced, the entanglement and cohesion of the strands during gathering are enhanced, and the built-in rotary entanglement of the yarn with the formed plied yarn structure is tight. And in the second stage, when the twisting direction of the transverse moving twisting of the twisting mechanism is opposite to the twisting direction of the ring spindle, the section of yarn forms a reverse twisting area 16, the built-in torsion stress of the two converged single yarns is balanced with the torsion torque of the ring spindle twisting, the distribution of the twist and the tension of the yarns in the traditional spinning process is changed, and the yarns in the formed strand structure are smooth and soft. And a third stage, wherein a positive and reverse twisting turning untwisted area 17 exists in the turning process of the twisting mechanism, the untwisted yarn strips 14 are output in a parallel untwisted state and are converged in a siro spinning twisting triangular area mode, and the two fiber strands are integrally transferred inside and outside to form a fiber buckling, twisting and clasping single yarn structure. The invention is characterized in that two fiber strands are twisted in a twisting and embracing mode firstly and then are converged and twisted in a double strip mode to form single yarn with a plied yarn structure, which integrates main body double-strand type and local twisting and embracing mode into a whole, thereby reducing yarn hairiness, improving yarn strength and softness, inheriting the raw material universality and variety adaptability of the traditional ring spinning and breaking through the structure characteristics of the spun ring spinning yarn.

In fig. 2, a single yarn is composed of a forward twist strand structural region 18, a reverse twist strand structural region 19, and a ring twist structural region 20; two Z-twisted pre-twisted yarn strips 131 form a positive-twisted strand structure area 18 under the positive spiral strand type winding of Z twist, the internal fibers are tightly entangled, the resultant yarn strength is improved, resultant yarn hairiness is fully wound into a yarn body, and the yarn hairiness is reduced; two S-twisted pre-twisted yarn strips 132 form a reverse-twisted strand structure area 19 under the reverse spiral strand winding of Z twist, and two reverse fibers are arranged and adjusted to form a yarn twist distribution shape, so that the integral torque of a single yarn is reduced; the untwisted yarn strips 14 are twisted and cohered into yarns under the driving of the Z-twisting ring spindle to form a segmented ring spindle twisting structure area 20, and the positive twisting strand structure area 18 and the reverse twisting strand structure area 19 are connected to balance the stress state of a yarn body. The twisting regulation multi-stage fiber arrangement structure generated by traversing friction of the integrated strand through the twisting roller 2 and the twisting leather roller 1 forms a main body double-strand spiral type and local twisting and embracing type single yarn structure, and realizes clear and distinct novel structure yarns integrating fiber strand twisting, embracing type twisting connection, multilayer fiber twisting spiral type embracing winding and different layer fiber twisting balance.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The spinning method of the invention patent is used for producing 19.7tex yarn. The raw materials used in the experiment were two bundles of 100% pure cotton roving. The spindle speed of the ring spinning machine is 7000 r/min. The traversing distance of the twisting mechanism is 3cm, the traversing speed is 2m/min, the reciprocating steering interlacing frequency is 15 times/min, the pressure between the twisting leather roller and the twisting roller is 100N, the diameter of the twisting leather roller is 3cm, and the height is 8 cm.

For each yarn number, single-strand yarn samples were processed for comparison using the conventional ring spinning method and the spinning method of the present invention, and the main properties of each yarn sample were tested, wherein the residual torque was tested by wet winding method, and the main property test results of each yarn sample are shown in table one:

watch 1

It can be seen from table one that, the hairiness value and the residual torque (wet twist number) of the yarn spun by the spinning method of the invention are both significantly reduced, and compared with the sirospun yarn spun by the traditional ring spinner, the breaking strength and the breaking elongation of the yarn spun by the spinning device of the invention are significantly improved, and the yarn evenness performance can be basically kept unchanged, so that a single yarn structure with a main body of double-strand type and local twisting holding type is formed, and the clear and distinct new-structure yarn integrating twisting connection of fiber strands, multi-layer fiber twisting spiral holding winding and balance of different-layer fiber twisting is realized. The technical method is simple, effectively improves the quality of finished yarn, has low manufacturing cost and is suitable for popularization and application in the textile industry.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A spinning method for spinning a single yarn with a plied yarn structure on a ring spinning frame is characterized by comprising the following steps: two ring spindle short fiber strands are input into a twisting mechanism in parallel after being drafted for twisting treatment, the strands are subjected to reciprocating twisting and twisting movement under the transverse friction action of the twisting mechanism, pre-twisting degree is applied to the strands to form a sliver with fiber twisting orientation, and meanwhile, the twisting degree directions of two ends of the sliver are opposite; then two yarns twisted and twisted are output from the twisting mechanism, form a convergent ply in a twisting triangular area, and are wound on a yarn bobbin through a yarn guide hook and a steel wire ring in sequence.

2. The spinning method for spinning the single yarn with the plied yarn structure on the ring spinning frame as claimed in claim 1, characterized in that when the twisting direction of the traversing twisting of the twisting mechanism is the same as the twisting direction of the ring spinning, the tension borne by the two fiber strands is obviously increased, the transfer of the fiber in the single strand strands is enhanced, the entanglement and cohesion of the strands during gathering are enhanced, and the built-in rotary entanglement of the yarn with the plied yarn structure is tight; when the twisting direction of the transverse moving twisting of the twisting mechanism is opposite to the twisting direction of the ring spindle, the built-in torsion stress of the two converged single yarns is balanced with the torsion torque of the ring spindle twisting, the formed yarn with the folded yarn structure is smooth and soft, a twisting-free area with positive and reverse twisting turning exists in the turning process of the twisting mechanism, the fiber strands are output in a parallel twisting-free state and are converged in a siro spinning twisting triangular area, and the two fiber strands are integrally and internally and externally transferred to form a fiber buckling, twisting and clasping single yarn structure.

3. A spinning device for implementing a spinning method for spinning a single yarn of a plied yarn structure on a ring spinning frame according to claim 1 or 2, the spinning device comprises a front leather roller, a front roller, an upper sheath, a middle roller, a rear leather roller, a rear roller, a yarn guide hook, a steel wire ring and a bobbin, and is characterized in that the spinning device further comprises a twisting leather roller and a twisting roller, the twisting leather roller and the twisting roller form a set of twisting mechanisms arranged at the front ends of the front leather roller and the front roller, wherein the front leather roller and the front roller can rotate and transversely reciprocate.

4. The spinning device for spinning the single yarn with the plied yarn structure on the ring spinning frame as claimed in claim 3, wherein the middle of the twisting leather roller is made of metal, and the surface of the twisting leather roller is made of rubber; the middle of the twisting roller is made of metal, and the surface layer is made of rubber or metal.

5. The spinning device for spinning the single yarn with the folded yarn structure on the ring spinning frame according to claim 3, wherein the traversing distance of the twisting mechanism is 1-5 cm, the traversing speed is 0.5-10 m/min, the reciprocating steering interlacing frequency is 10-30 times/min, and the pressure between the twisting leather roller and the twisting roller is 100-200N.

6. The spinning device for spinning the single yarn with the plied yarn structure on the ring spinning frame as claimed in claim 3, wherein the twisting mechanism has three motion forms: the twisting roller and the twisting leather roller both do the movement of rotating and reciprocating transverse movement; the twisting roller only rotates, and the twisting leather roller rotates and reciprocates transversely; the twisting leather roller only rotates, and the twisting roller rotates and reciprocates transversely.

7. A yarn produced by the spinning method of spinning a single yarn of a plied yarn structure on a ring spinning frame of claim 1, wherein the yarn comprises a forward twisted plied yarn structure section, a reverse twisted plied yarn structure section and a ring twisting structure section, wherein the ring twisting structure section is engaged between the forward twisted plied yarn structure section and the reverse twisted plied yarn structure section.

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