CN114836864A - Vortex core-spun yarn production device and production method - Google Patents

Abstract

The invention provides a production device and a production method of vortex core-spun yarn, wherein a short fiber aggregate is drafted by a drafting system to obtain a short fiber strand with a certain twist, one end of partial fiber outside the short fiber strand is adsorbed by negative pressure airflow to be separated from the strand in a vortex twisting core-spun device, one end of the other end which is not separated from the strand is held by a pressing roller pair along with the forward output of the short fiber strand, a fed core filament is held by the pressing roller pair and then fed, the core filament and the short fiber strand are combined in the pressing process to obtain a central body of the yarn, the fiber separated from the strand is gradually and uniformly dispersed in an upper hollow cavity with continuously increased inner diameter and enters a rotating lower hollow cavity, the fiber end is attached to a cavity wall under the adsorption action of the negative pressure in the cavity wall, and the fiber end is wound on the central body in a spatial three-dimensional state along with the rotation of the lower hollow cavity, and the complete confluence with the central body is realized along with the gradual reduction of the inner diameter of the lower hollow cavity, so that the vortex core-spun yarn is obtained.

Description

Vortex core-spun yarn production device and production method

Technical Field

The invention relates to the field of novel yarns, in particular to a device and a method for producing vortex core-spun yarns.

Background

With the development of social economy, the living standard of people is continuously improved, and for textiles for clothes, in addition to the pursuit of wearing comfort, the fashionability and functionality of the textiles for clothes are also paid more and more attention, and the pursuit of unique style and various functions such as antibacterial and antistatic functions are pursued. To meet this demand of consumers, new yarns and fabrics are continuously being developed as an important task in the textile industry. With the development of science and technology, the textile market competition is more and more intense, and each manufacturer continuously develops towards high-grade, good technical content and high added value in order to pursue the maximization of profit.

Meanwhile, with the increasing development of social economy and the continuous improvement of the living standard of people, the consumption concept of people is continuously updated, the requirements on the functionality and the serviceability of the clothes are higher and higher, and especially the requirements on the aspects of antibiosis, health care, hand feeling quality and the like of the clothes are continuously improved; on the other hand, with the development of economy, the application fields of various functional fibers and textiles are gradually expanded. Therefore, the development of fiber materials having various special functions is receiving more and more attention, and the kinds of functional fiber materials are also more and more complete. However, the performance of various functional fibers is often single, for example, bamboo charcoal fibers have excellent antibacterial performance, but have poor handfeel, skin-friendliness, cohesive force and spinnability, so that functional textiles with comprehensive performance need to be blended by multiple fibers, how to select different types and proportions of fibers to mix, and what spinning process is adopted to spin functional high-quality yarns with excellent performance, which is a problem to be solved urgently at present.

In view of the above, the present invention provides a device and a method for producing an eddy current core-spun yarn, wherein an enveloped short fiber assembly with a certain twist is drafted by a drafting system to obtain a short fiber strand with a certain twist, the short fiber strand enters an eddy current twisting core-spun device, one end of a part of fibers outside the short fiber strand in the eddy current twisting core-spun device is adsorbed by negative pressure airflow to be separated from the strand, the other end of the fibers is not separated from the strand along with the forward output of the short fiber strand and is held by a pressing roller pair at one end, simultaneously, a fed core filament is fed after being held by the pressing roller pair, the combination of the core filament and the pressed central short fiber strand is realized in the pressing process to obtain a central body of the yarn, the fibers separated from the strand realize gradual and uniform dispersion in an upper hollow cavity with an increasing inner diameter, and then the uniformly dispersed fiber ends enter a rotating lower hollow cavity, make the fiber end hug closely on the chamber wall on the one hand under the adsorption of the interior negative pressure of chamber wall in the lower hollow cavity, on the other hand makes the fiber end constantly be space three-dimensional state winding on the central body along with the rotation of lower hollow cavity, and finally realizes converging completely with the central body along with the diminishing gradually of the internal diameter of lower hollow cavity to obtain required vortex covering yarn.

This patent will have the short-staple aggregate draft of certain twist to obtain and remain the short-staple fiber strand that has certain twist and make outside partial fiber end produce behind vortex twisting covering device and break away from, thereby form the outside fibre that can the package twist, and realize the twisting after through vortex homodisperse, thereby improve twisting efficiency by a wide margin, and through the feeding of the roller pair realization core silk and the combination of short-staple of pressing in the vortex twisting covering device, thereby effectively improve the cladding effect of core silk, then the realization has the outside and is spiral twisting structure, inside is the production of the high-quality yarn of the interior pine of loose fiber aggregate structure of tightening outward.

Disclosure of Invention

The invention aims to provide a vortex core-spun yarn production device and a production method, wherein a vortex twisting core-spun device with a hollow structure is adopted, so that part of fiber ends outside a short fiber strand which is obtained by drafting a short fiber aggregate with certain twist and is left with certain twist are separated to form external fibers which can be wrapped and twisted, and the twisting is realized after vortex is uniformly dispersed, so that the twisting efficiency is greatly improved, meanwhile, the feeding of a core yarn and the combination of the core yarn and the short fiber are realized through a pressing roller in the vortex twisting core-spun device, so that the wrapping effect of the core yarn is effectively improved, and the production of high-quality yarn with an internal loose and external tight structure which is of a spiral twisting structure outside and is of a loose fiber aggregate inside is realized.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a vortex core-spun yarn production device comprises a drafting device, a vortex twisting core-spun device and a winding device, wherein the drafting device comprises a rear roller drafting pair, a middle front roller drafting pair and a front drafting roller pair, the rear roller drafting pair comprises a rear lower roller and a rear upper gluing roller, the middle rear roller drafting pair comprises a middle rear lower roller and a middle rear upper gluing roller, the middle front roller drafting pair comprises a middle front lower roller and a middle front upper gluing roller, the front roller drafting pair comprises a front lower roller and a front upper gluing roller, the rear lower roller, the middle front lower roller and the front lower roller are made of steel materials with solid structures, the rear upper gluing roller, the middle front upper gluing roller and the front upper gluing roller comprise a glue roller shaft and a glue roller sleeve, the glue roller shaft is made of iron materials with solid structures, the glue roller sleeve is made of rubber materials, the glue roller sleeve is connected with the glue roller shaft through a bearing, so that the glue roller sleeve can freely rotate around the glue roller shaft, the back lower roller and the back upper sizing roller are tightly pressed with each other to form a first straight line contact jaw, the middle back lower roller and the middle back upper sizing roller are tightly pressed with each other to form a second straight line contact jaw, the middle front lower roller and the middle front upper sizing roller are tightly pressed with each other to form a first cambered surface contact jaw, the pressure between the middle front lower roller and the middle back upper sizing roller is increased and then reduced on the first cambered surface contact jaw from back to front along the fiber movement direction, the maximum pressure position between the middle front lower roller and the middle front upper sizing roller is a third straight line contact jaw in horizontal straight line distribution, the structure of the first cambered surface contact jaw is in axial symmetry distribution relative to the third straight line contact jaw, meanwhile, the pressure distribution on the first cambered surface contact jaw is also in axial symmetry distribution relative to the third straight line contact jaw, and the front lower roller and the front upper sizing roller are tightly pressed with each other to form a second cambered surface contact jaw, and the pressure between the second cambered surface contact jaw and the front upper rubber roller is increased and then reduced along the movement direction of the fiber, the maximum pressure value between the front lower roller and the front upper rubber roller is a fourth straight line contact jaw which is distributed in a horizontal straight line, the cambered surface of the second cambered surface contact jaw positioned at the rear part of the fourth straight line contact jaw is larger than the cambered surface of the front part of the straight line positioned at the maximum pressure value, so that the pressure distribution on the second cambered surface contact jaw is also identical, the vortex twisting core-spun device is positioned at the front part of the drafting device, the vortex twisting core-spun device comprises an upper fiber separating device and a lower twisting core-spun device, the upper fiber separating device is in a hollow elliptic semispherical structure, the top end and the bottom end of the upper fiber separating device are both provided with round openings, the caliber of the round opening at the bottom end is larger than the caliber of the round opening at the top end, and the caliber of the upper fiber separating device is gradually increased from top to bottom, the upper fiber separating device keeps static, an upper hole with an upward inclined opening is formed in the side face of the upper fiber separating device, the distribution density of the upper hole is gradually increased from top to bottom along the side face, a pressing roller pair is arranged on the bottom end circular face of the upper fiber separating device and comprises a pressing upper rubber roller and a pressing lower rubber roller, the pressing upper rubber roller and the pressing lower rubber roller are identical in structure and comprise a rubber roller shaft and a rubber roller sleeve, the rubber roller sleeve is connected with the rubber roller shaft through a bearing so that the rubber roller sleeve can freely rotate around the rubber roller shaft, the pressing upper rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through an upper connecting rod, the upper connecting rod is a cross rod capable of controlling extension and shortening, the pressing lower rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through a lower connecting rod, the lower connecting rod is a cross rod capable of controlling extension and shortening, and the lower core-spun device is of a hollow elliptical hemisphere structure, the top end and the bottom end of the lower twisting core-spun device are both circular openings, the caliber of the circular opening at the bottom end is smaller than that of the circular opening at the top end, the caliber of the lower twisting core-spun device is gradually reduced from top to bottom, the top end round surface of the lower twisting core-spun device is connected with the bottom end round surface of the upper fiber separating device in a sealing manner through a bearing, the bottom end round surface of the lower twisting core-spun device is connected with the side surface in a sealing manner through a bearing, the lower twisting core-spun device is driven by a motor to rotate, the top end round surface and the side surface of the lower twisting core-spun device synchronously rotate under the driving of the motor, but the bottom end round surface of the lower twisting core-spun device is always kept static, a lower hole with a vertical opening is formed in the side surface of the lower twisting core-spun device, and the distribution density of the lower hole is kept consistent along the side surface.

The invention also relates to a method for producing the vortex core-spun yarn, when in use, the short fiber aggregate which generates the outer fiber and has a certain twist is fed into a drafting system, in the drafting system, the fed short fiber aggregate is firstly held by a first linear contact jaw between a back lower roller and a back upper sizing roller, at the moment, the short fiber aggregate held by the first linear contact jaw is drafted by a rotating back roller to realize the passive unwinding of the short fiber aggregate from a winding device and the active feeding into the drafting system, the fed short fiber aggregate is then held by a second linear contact jaw between a middle lower roller and the middle upper sizing roller, at the moment, in a back drafting area formed by a back roller drafting pair and a middle back roller pair, the back end of the fed short fiber aggregate is held by the first linear contact jaw, the front end is held by the second linear contact jaw, so that the short fiber aggregate is subjected to the linear drafting action of the simple rollers, under the action, when one end of the fiber in the short fiber aggregate is held by the second linear contact jaw, the fiber is converted from slow motion which keeps consistent with the speed of a motion linear of the drafting pair of the back rollers into fast motion which keeps consistent with the speed of the motion linear of the drafting pair of the middle and back rollers, namely, the speed change process of the fiber is realized, and the fiber which is in contact with the fiber and is not held by the second linear contact jaw is driven by the fiber which is subjected to speed change, so that the contacted fiber is subjected to gradual speed change until the contacted fiber is held by the second linear contact jaw, the fiber speed change gradient distribution is formed near the second linear contact jaw, and the fiber speed change gradient formed near the second linear contact jaw is narrower due to the narrow control range of the second linear contact jaw and the small multiple of a back drafting area, the linear density of the short fiber assembly is reduced under the action of speed change, simultaneously, the twist of the short fiber assembly is partially removed due to the gradient distribution and the smaller drafting multiple in the speed change process, so that a first short fiber strand is obtained, the first short fiber strand is then held by a first cambered surface contact jaw between a middle front lower roller and a middle front upper rubber roller, at the moment, in a middle drafting area formed by a middle rear roller drafting pair and a middle front roller drafting pair, the rear end of the first short fiber strand is held by a second linear contact jaw, the front end of the first short fiber strand is held by a first cambered surface contact jaw, so that the first short fiber strand is subjected to the action of single-side cambered surface drafting, under the action, when one end of the fiber in the first short fiber strand is held by the first cambered surface contact jaw, the fiber is held by a jaw line with small pressure at the rear part of the first cambered surface contact jaw, and then the held acting force is gradually increased, until the fiber is held by a third linear contact jaw at the maximum pressure, so that the fiber realizes gradual speed change under the holding action of gradually increased pressure, the linear density of the first short fiber strand is reduced under the speed change action, and the speed change points of the fiber are different due to different magnitudes of internal friction force fields formed by friction forces of other fibers received by the fibers in the first short fiber strand, so that the speed change points are distributed in a gradient manner in a first cambered surface contact jaw positioned at the rear part of the third linear contact jaw, and the fiber which completes speed change or is not completely changed but held by the first cambered surface contact jaw drives the fiber which is contacted with the fiber but not held by the first cambered surface contact jaw, so that the contacted fibers are subjected to gradual speed change until the fibers are held by the first cambered surface contact jaw and completely changed, thereby forming fiber variable speed gradient distribution near the first cambered surface contact jaw for holding, wherein the fiber variable speed gradient distribution range is larger than that of the middle and rear roller draft pairs, the extended fiber variable speed gradient distribution range enables the twist removal effect of the first short fiber strand in the process of larger linear density reduction to be weakened, so that more residual twist is kept in the manufactured second short fiber strand, the second short fiber strand is then held by the second cambered surface contact jaw between the front lower roller and the front upper gluing roller, at the moment, in a front draft area formed by the middle and front roller draft pairs, the rear end of the second short fiber strand is held by the first cambered surface contact jaw, the front end of the second short fiber strand is held by the second cambered surface contact jaw, so that the second short fiber strand is subjected to bilateral cambered surface draft effect, under the effect, the rear end of the fiber in the second short fiber strand is held by the first cambered surface contact jaw, at the moment, the fiber is firstly held and conveyed by a jaw line at the maximum pressure position where the first cambered surface contacts the middle part of the jaw, then the held acting force is gradually reduced until the fiber is completely separated from the control of the first cambered surface contact jaw, so that the fiber strand is gradually separated under the holding action of gradually reduced pressure, on one hand, the forward extension of the first cambered surface contact jaw to the fiber control range is realized, on the other hand, the residual twist in the output second short fiber strand is more stably kept, when one end of the fiber in the second short fiber strand is held by the second cambered surface contact jaw, the fiber is firstly held by a jaw line with small pressure at the rear part of the second cambered surface contact jaw, then the held acting force is gradually increased until the fiber is held by a fourth linear contact jaw at the maximum pressure position, so that the fiber realizes the gradual speed change under the holding action of gradually increased pressure, the linear density of the second short fiber strand is reduced under the action of speed change, and because the internal friction force field formed by the friction force of other fibers received by each fiber in the second short fiber strand is different in size, the speed change points of the fibers are different, so that speed change points in gradient distribution are formed in a second arc-surface contact jaw positioned at the rear part of a fourth linear contact jaw, and simultaneously the fibers which finish speed change or are not completely finished in speed change but are held by the second arc-surface contact jaw drive the fibers which are in contact with the fibers but not held by the second arc-surface contact jaw, so that the contacted fibers are subjected to gradual speed change until being held by the second arc-surface contact jaw and subjected to complete speed change, and fiber speed change gradient distribution is formed near the second arc-surface contact jaw, at the moment, because the drafting multiple of a front drafting area is large, and the internal friction force field formed by the acting force between the fibers in the second short fiber strand is large, the gradient distribution of larger speed change points is formed, the twist removing effect of the second short fiber strand in the process of reducing the linear density in a large range is weakened under the large drafting effect, a small amount of residual twist is kept in the prepared short fiber strand, the prepared short fiber strand is held and conveyed by a fourth linear contact jaw at the position of the maximum pressure value of the middle part of a second cambered surface contact jaw, the holding acting force is gradually reduced until the control of the second cambered surface contact jaw is completely separated, the strand is gradually separated under the holding effect of gradually reduced pressure, and the residual twist in the output short fiber strand is kept more stably; the output short fiber strand then enters the vortex twisting core-spun device, at the moment, the short fiber strand firstly enters the upper fiber separation device, one end of the fiber on the surface of the entering short fiber strand begins to separate from the strand under the adsorption action of negative pressure in the upper hole, the separated fiber end is attached to the inner wall under the action of the negative pressure which is generated in the upper hole and inclines downwards along the inner wall of the upper fiber separation device and moves downwards along the inner wall, the fiber end begins to be uniformly dispersed along the gradually increased inner wall surface along with the gradual increase of the caliber of the upper fiber separation device and the increase of the distribution density of the upper hole in the downward movement process, meanwhile, only part of the fiber end in the short fiber strand is separated due to certain twist degree remained in the short fiber strand, and the rest fiber is still completely positioned in the strand, so that a central strand is formed, and in the process that the separated fiber end moves downwards along the inner wall of the upper fiber separation device, the central fiber strand also moves downwards along the cavity of the upper fiber separating device, the downward movement speed of the central fiber strand is slightly less than the downward movement speed of the separated fiber end, so that the downward movement speed of the separated fiber end relative to the central fiber strand is generated in the upper fiber separating device, the length of the separated fiber end separated from the central fiber strand is increased under the relative movement, when the central fiber strand moves to the bottom end of the upper fiber separating device, the central fiber strand is tightly pressed between the pressing upper rubber roller and the pressing lower rubber roller of the pressing roller pair, the process of separating the fiber end from the central fiber strand is stopped under the pressing action, so that the fiber at the separated fiber end cannot be completely separated from the central fiber strand, namely, one end of the fiber at the separated fiber end is separated from the central fiber strand, the other end of the fiber is positioned in the central fiber strand, in the process, when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be consistent with the height of the conveyed central fiber strip, the separation movement of the fiber end is stopped instantly at the pressing point of the pressed roller pair of the central fiber strip, when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be larger than the height of the conveyed central fiber strip, the central fiber strip can move upwards in a climbing manner before entering the pressing point, so that the separation process of the fiber end from the central fiber strip is slowed down until the top end cambered surface enters the pressing point, the separation length of the fiber end from the central fiber strip is reduced, and when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be smaller than the height of the conveyed central fiber strip, the central fiber strip can move upwards in a descending manner before entering the pressing point, so that the process that the fiber end is separated from the central strand is accelerated until the fiber end enters a pressing point and stops completely, the length of the fiber where the separated fiber end is positioned is increased, the control of the fiber separation motion is realized through the length adjustment of the upper connecting rod, the length of the lower connecting rod is adaptively changed in the length change process of the upper connecting rod, so that the pressing state between the upper rubber roller and the lower rubber roller is kept tight, meanwhile, the core wire wound on a bobbin is actively unwound after being driven by the driving roller, the unwound core wire is pressed by the pressing roller under certain tension after passing through the guide wire device, the core wire is pressed into the central strand under the pressing action to obtain a central yarn body, so that the combination of the core wire and the central strand is realized, the pressed and output central yarn body and the separated fiber end enter the lower twisting core-wrapping device immediately by the pressing roller, the fiber end entering the lower twisting core-spun device is tightly attached to the inner wall of the lower twisting core-spun device under the adsorption action generated by the negative pressure in the lower hole, in the process, because the negative pressure action is not generated at the connecting section of the upper fiber separating device and the lower twisting core-spun device, the fiber end naturally droops into the lower twisting core-spun device under the self gravity, then the fiber end is uniformly dispersed and attached to the inner wall of the lower twisting core-spun device according to the self length under the action of the vertical negative pressure generated in the lower hole, at the moment, the fiber end attached to the inner wall is wrapped on the central yarn body along with the rotation of the lower twisting core-spun device, and along with the reduction of the caliber of the lower twisting core-spun device, the inner wall of the lower twisting core-spun device is gradually reduced, and then the fiber end is tightly attached and wrapped on the central yarn body step by step until the fiber end moves to the bottom end round surface of the lower twisting core-spun device, then the required vortex core-spun yarn is obtained, the round surface at the bottom end keeps static and the caliber is small, so that the whole compact extrusion and fixation effect is generated on the prepared vortex core-spun yarn; the manufactured vortex core-spun yarn is continuously wound on a yarn barrel through a winding device, the yarn barrel is fixedly nested on a copper pipe, the copper pipe is driven by an independent motor to rotate at a constant speed, then the yarn barrel is driven to rotate correspondingly, a circulating swing device is arranged above the copper pipe, the manufactured vortex core-spun yarn passes through the circulating swing device and then is wound on the yarn barrel, and the vortex core-spun yarn is uniformly wound on the yarn barrel in parallel through the periodic circulating reciprocating motion of the circulating swing device along the length direction of the yarn barrel.

Drawings

Fig. 1 is a schematic structural diagram of the vortex twisting core-spun device of the patent.

1. The method comprises the steps of an upper fiber separation device, 2, an upper hole, 3, a lower twisting and core-wrapping device, 4, a lower hole, 5, an upper connecting rod, 6, a pressing upper rubber roller, 7, a lower connecting rod, 8 and a pressing lower rubber roller.

Detailed Description

A vortex core-spun yarn production device comprises a drafting device, a vortex twisting core-spun device and a winding device, wherein the drafting device comprises a rear roller drafting pair, a middle front roller drafting pair and a front drafting roller pair, the rear roller drafting pair comprises a rear lower roller and a rear upper gluing roller, the middle rear roller drafting pair comprises a middle rear lower roller and a middle rear upper gluing roller, the middle front roller drafting pair comprises a middle front lower roller and a middle front upper gluing roller, the front roller drafting pair comprises a front lower roller and a front upper gluing roller, the rear lower roller, the middle front lower roller and the front lower roller are made of steel materials with solid structures, the rear upper gluing roller, the middle front upper gluing roller and the front upper gluing roller comprise a glue roller shaft and a glue roller sleeve, the glue roller shaft is made of iron materials with solid structures, the glue roller sleeve is made of rubber materials, the glue roller sleeve is connected with the glue roller shaft through a bearing, so that the glue roller sleeve can freely rotate around the glue roller shaft, the back lower roller and the back upper sizing roller are tightly pressed with each other to form a first straight line contact jaw, the middle back lower roller and the middle back upper sizing roller are tightly pressed with each other to form a second straight line contact jaw, the middle front lower roller and the middle front upper sizing roller are tightly pressed with each other to form a first cambered surface contact jaw, the pressure between the middle front lower roller and the middle back upper sizing roller is increased and then reduced on the first cambered surface contact jaw from back to front along the fiber movement direction, the maximum pressure position between the middle front lower roller and the middle front upper sizing roller is a third straight line contact jaw in horizontal straight line distribution, the structure of the first cambered surface contact jaw is in axial symmetry distribution relative to the third straight line contact jaw, meanwhile, the pressure distribution on the first cambered surface contact jaw is also in axial symmetry distribution relative to the third straight line contact jaw, and the front lower roller and the front upper sizing roller are tightly pressed with each other to form a second cambered surface contact jaw, and the pressure between the second cambered surface contact jaw and the front upper rubber roller is increased and then reduced along the movement direction of the fiber, the maximum pressure value between the front lower roller and the front upper rubber roller is a fourth straight line contact jaw which is distributed in a horizontal straight line, the cambered surface of the second cambered surface contact jaw positioned at the rear part of the fourth straight line contact jaw is larger than the cambered surface of the front part of the straight line positioned at the maximum pressure value, so that the pressure distribution on the second cambered surface contact jaw is also identical, the vortex twisting core-spun device is positioned at the front part of the drafting device, the vortex twisting core-spun device comprises an upper fiber separating device 1 and a lower twisting core-spun device 3, the upper fiber separating device 1 is in a hollow elliptic semispherical structure, the top end and the bottom end of the upper fiber separating device are both provided with round openings, the caliber of the round opening at the bottom end is larger than the caliber of the round opening at the top end, and the caliber of the upper fiber separating device 1 is gradually increased from top to bottom, the upper fiber separating device keeps static, an upper hole 2 with an upward inclined opening is formed in the side face of the upper fiber separating device, the distribution density of the upper hole is gradually increased from top to bottom along the side face, a pressing roller pair is arranged on the bottom end circular face of the upper fiber separating device and comprises a pressing upper rubber roller 6 and a pressing lower rubber roller 8, the pressing upper rubber roller and the pressing lower rubber roller have the same structure and comprise a rubber roller shaft and a rubber roller sleeve, the rubber roller sleeve is connected with the rubber roller shaft through a bearing so that the rubber roller sleeve can freely rotate around the rubber roller shaft, the pressing upper rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through an upper connecting rod 5, the upper connecting rod is a cross rod capable of controlling extension and shortening, the pressing lower rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through a lower connecting rod 7, the lower connecting rod is a cross rod capable of controlling extension and shortening, and the lower twisting core-wrapping device 3 is of a hollow elliptic semispherical structure, the top end and the bottom end of the lower twisting core-spun device 3 are both circular openings, the caliber of the circular opening at the bottom end is smaller than that of the circular opening at the top end, the caliber of the lower twisting core-spun device is gradually reduced from top to bottom, the top end round surface of the lower twisting core-spun device is connected with the bottom end round surface of the upper fiber separating device in a sealing manner through a bearing, the bottom end round surface of the lower twisting core-spun device is connected with the side surface in a sealing manner through a bearing, the lower twisting core-spun device is driven by a motor to rotate, the top end round surface and the side surface of the lower twisting core-spun device synchronously rotate under the driving of the motor, but the bottom end round surface of the lower twisting core-spun device is kept still all the time, the side surface of the lower twisting core-spun device is provided with a lower hole 4 with a vertical opening, and the distribution density of the lower hole is kept consistent along the side surface.

When in use, the short fiber aggregate which generates the wrapping fiber and has certain twist is fed into the drafting system, in the drafting system, the fed short fiber aggregate is firstly held by a first linear contact jaw between a back lower roller and a back upper sizing roller, at the moment, the held short fiber aggregate held by the first linear contact jaw is driven by a rotating back roller drafting pair to realize the passive unwinding of the short fiber aggregate from a winding device and the active feeding to the drafting system, the fed short fiber aggregate is then held by a second linear contact jaw between a middle back lower roller and the middle back upper sizing roller, at the moment, in a back drafting area formed by the back roller drafting pair and the middle back roller drafting pair, the back end of the fed short fiber aggregate is held by the first linear contact jaw, and the front end is held by the second linear contact jaw, thereby the short fiber aggregate is subjected to the linear drafting action of a simple roller, under the action, when one end of the fiber in the short fiber assembly is held by the second linear contact jaw, the fiber is converted from slow motion which keeps consistent with the speed of the back roller drafting pair motion linear velocity into fast motion which keeps consistent with the speed of the middle and back roller drafting pair motion linear velocity, namely, the speed change process of the fiber is realized, and the fiber which is in contact with the fiber and is not held by the second linear contact jaw is driven by the fiber which is subjected to speed change, so that the contacted fiber is subjected to gradual speed change until the contacted fiber is held by the second linear contact jaw, fiber speed change gradient distribution is formed near the second linear contact jaw, and the fiber speed change gradient formed near the second linear contact jaw is narrower due to the narrow control range of the second linear contact jaw and the small drafting area of the back drafting area, so that the linear density of the short fiber assembly is reduced under the speed change action, simultaneously, the twist of the short fiber aggregate is partially removed due to the gradient distribution and the smaller draft multiple in the speed changing process, so that a first short fiber strand is obtained, the first short fiber strand is then held by a first cambered surface contact jaw between a middle front lower roller and a middle front upper rubber roller, at the moment, in a middle draft area formed by the middle rear roller draft pair and the middle front roller draft pair, the rear end of the first short fiber strand is held by a second linear contact jaw, the front end of the first short fiber strand is held by a first cambered surface contact jaw, so that the first short fiber strand is subjected to the single-side cambered surface draft effect, under the effect, when one end of the fiber in the first short fiber strand is held by the first cambered surface contact jaw, the fiber is firstly held by a jaw line with small pressure at the rear part of the first cambered surface contact jaw, then the holding acting force is gradually increased until the fiber is held by a third linear contact jaw at the maximum pressure, therefore, the fibers realize gradual speed change under the holding action of gradually increased pressure, the linear density of the first short fiber strand is reduced under the speed change action, and the speed change points of the fibers are different due to different magnitudes of internal friction force fields formed by friction forces of other fibers received by the fibers in the first short fiber strand, so that the speed change points in gradient distribution are formed in the first cambered surface contact jaw positioned at the rear part of the third linear contact jaw, and simultaneously, the fibers which complete speed change or the fibers which do not complete speed change but are held by the first cambered surface contact jaw drive the fibers which are in contact with the fibers but are not held by the first cambered surface contact jaw, so that the contacted fibers are subjected to gradual speed change until the fibers are held by the first cambered surface contact jaw and subjected to complete speed change, and fiber speed change gradient distribution is formed near the first cambered surface contact jaw, the fiber variable speed gradient distribution range is larger than the fiber variable speed gradient distribution at the middle and rear roller drafting pairs, the extending fiber variable speed gradient distribution range weakens the twist removing effect of the first short fiber strand in the process of reducing larger linear density, so that more residual twist is kept in the manufactured second short fiber strand, the second short fiber strand is then held by a second cambered surface contact jaw between the front lower roller and the front upper roller, at the moment, in a front drafting area formed by the middle and front roller drafting pairs, the rear end of the second short fiber strand is held by the first cambered surface contact jaw, the front end of the second short fiber strand is held by a second cambered surface contact jaw, so that the second short fiber strand is subjected to bilateral cambered surface drafting effect, under the effect, the rear end of the fiber in the second short fiber strand is held by the first cambered surface contact jaw, at the moment, the fiber is firstly held by the line at the maximum pressure point of the first cambered surface contact jaw, then the held acting force is gradually reduced until the control of the first cambered contact jaw is completely separated, so that the strand realizes the gradual separation action under the holding action of the gradually reduced pressure, thereby realizing the forward extension of the fiber control range by the first cambered contact jaw on one hand, and on the other hand, the residual twist in the output second short fiber strand can be more stably kept, when one end of the fiber in the second short fiber strand is held by the second cambered contact jaw, the fiber is firstly held by a jaw line with small pressure at the rear part of the second cambered contact jaw, then the held acting force is gradually increased until the fiber is held by a fourth linear contact jaw at the maximum pressure, thereby realizing the gradual speed change of the fiber under the holding action of the gradually increased pressure, and reducing the linear density of the second short fiber strand under the speed change action, and because the fibers in the second short fiber strand are subjected to different internal friction force fields formed by the friction forces of other fibers, the speed change points of the fibers are different, so that the speed change points of the fibers are formed in a gradient distribution manner in a second arc-surface contact jaw positioned at the rear part of a fourth linear contact jaw, and the fibers which are in speed change or are not completely speed change but are held by the second arc-surface contact jaw drive the fibers which are in contact with the fibers but are not held by the second arc-surface contact jaw, so that the contacted fibers are subjected to gradual speed change until the fibers are held by the second arc-surface contact jaw and are subjected to complete speed change, and a fiber speed change gradient distribution is formed near the second arc-surface contact jaw, at the moment, because the drafting multiple of a front drafting area is large, and the internal friction force field formed by the acting forces among the fibers in the second short fiber strand is large, the gradient distribution of larger speed change points is formed, the twist removing effect of the second short fiber strand in the process of reducing the linear density in a large range is weakened under the large drafting effect, a small amount of residual twist is kept in the prepared short fiber strand, the prepared short fiber strand is held and conveyed by a fourth linear contact jaw at the position of the maximum pressure value of the middle part of a second cambered surface contact jaw, the holding acting force is gradually reduced until the control of the second cambered surface contact jaw is completely separated, the strand is gradually separated under the holding effect of gradually reduced pressure, and the residual twist in the output short fiber strand is kept more stably; the output short fiber strand then enters the vortex twisting core-spun device, at this moment, the short fiber strand firstly enters the upper fiber separating device 1, one end of the fiber on the surface of the entering short fiber strand begins to separate from the strand under the adsorption action of the negative pressure in the upper hole 2, the separated fiber end is attached to the inner wall under the action of the negative pressure which is generated in the upper hole 2 and inclines downwards along the inner wall of the upper fiber separating device 1, and simultaneously moves downwards along the inner wall, during the downward movement, along with the gradual increase of the aperture of the upper fiber separating device 1 and the increase of the distribution density of the upper hole 2, the fiber end begins to be uniformly dispersed along the gradually increased inner wall surface, meanwhile, because a certain twist degree is remained in the short fiber strand, only part of the fiber end in the short fiber strand is separated, and the rest fiber is still completely positioned in the strand, thereby forming a central strand, in the process that the separated fiber end moves downwards along the inner wall of the upper fiber separating device 1, the central fiber strand also moves downwards along the cavity of the upper fiber separating device 1, and the downward movement speed of the central fiber strand is slightly smaller than the downward movement speed of the separated fiber end, so that the downward movement speed of the separated fiber end relative to the central fiber strand is generated in the upper fiber separating device 1, under the relative movement, the length of the separated fiber end separated from the central fiber strand is increased, when the central fiber strand moves to the bottom end of the upper fiber separating device 1, the central fiber strand is tightly pressed between the upper rubber roller 6 and the lower rubber roller 8 of the pressing roller pair, the process that the fiber end is separated from the central fiber strand is stopped under the pressing action, so that the fiber at the separated fiber end cannot be completely separated from the central fiber strand, namely, the fiber end at the separated fiber end is separated from the central fiber strand, The other end is positioned in the central strand, in the process, when the length of the upper connecting rod 5 enables the top end cambered surface of the rubber roller sleeve of the pressing rubber roller 6 to be consistent with the height of the conveyed central strand, the separation motion of the fiber end is stopped instantly at the pressing point of the pressed roller pair of the central strand, when the length of the upper connecting rod 5 enables the top end cambered surface of the rubber roller sleeve of the pressing rubber roller 6 to be larger than the height of the conveyed central strand, the central strand can perform upward climbing motion before entering the pressing point, so that the process that the fiber end is separated from the central strand is slowed down until the fiber end enters the pressing point and is completely stopped, the length of the fiber where the separated fiber end is located is separated from the central strand is reduced, when the length of the upper connecting rod 5 enables the top end cambered surface of the rubber roller sleeve of the pressing rubber roller 6 to be smaller than the height of the conveyed central strand, the central strand will move up and down slope before entering the pressing point, so that the process that the fiber end is separated from the central strand is accelerated until the fiber end is completely stopped at the pressing point, so that the length of the fiber at which the separated fiber end is positioned is increased, the control of the fiber separation movement is realized by the length adjustment of the upper connecting rod 5, the length of the lower connecting rod 7 is adaptively changed in the length change process of the upper connecting rod, so that the pressing upper rubber roller 6 and the pressing lower rubber roller 8 are always kept in a tight pressing state, meanwhile, the core filament wound on the bobbin is actively unwound after being driven by the driving roller, the unwound core filament is pressed by the pressing roller with a certain tension after passing through the filament guiding device, the core filament is pressed into the central strand under the pressing action to obtain a central yarn body, so that the combination of the core filament and the central strand is realized, the central yarn body pressed and output by the pressed roller pair and the separated fiber end immediately enter the lower twisting core-spun device, the fiber end entering the lower twisting core-spun device 3 immediately clings to the inner wall of the lower twisting core-spun device 3 under the adsorption action generated by the negative pressure in the lower hole 4, in the process, because no negative pressure action exists at the connecting section of the upper fiber separating device 1 and the lower twisting core-spun device 3, the fiber end naturally droops into the lower twisting core-spun device 3 under the self gravity, and then the fiber end is uniformly dispersed and attached to the inner wall of the lower twisting core-spun device 3 according to the self length under the action of the vertical negative pressure generated in the lower hole 4, at the moment, along with the rotation of the lower twisting core-spun device 3, the fiber end attached to the inner wall is wrapped on the central yarn body, and along with the reduction of the caliber of the lower twisting core-spun device 3, the inner wall of the lower twisting core-spun device 3 is gradually reduced, then the fiber end is gradually and tightly attached to the central yarn body for wrapping until the fiber end moves to the bottom round surface of the lower twisting core-spun device, and then the required vortex core-spun yarn is obtained, the bottom round surface is kept static and the caliber is small, so that the whole compact extrusion and fixation effect is generated on the prepared vortex core-spun yarn; the manufactured vortex core-spun yarn is continuously wound on a yarn barrel through a winding device, the yarn barrel is fixedly nested on a copper pipe, the copper pipe is driven by an independent motor to rotate at a constant speed, then the yarn barrel is driven to rotate correspondingly, a circulating swing device is arranged above the copper pipe, the manufactured vortex core-spun yarn passes through the circulating swing device and then is wound on the yarn barrel, and the vortex core-spun yarn is uniformly wound on the yarn barrel in parallel through the periodic circulating reciprocating motion of the circulating swing device along the length direction of the yarn barrel.

Claims (3)

1. The vortex core-spun yarn production method is processed by adopting a vortex spinning core-spun yarn production device, and is characterized in that: the short fiber aggregate with certain twist wrapped is drafted by a drafting system to obtain a short fiber strand with certain twist, the short fiber strand then enters a vortex twisting and core-covering device, one end of partial fiber outside the short fiber strand in the vortex twisting and core-covering device is adsorbed by negative pressure airflow so as to be separated from the strand, meanwhile, one end of the strand, the other end of which is not separated, is held by a pressing roller pair along with the forward output of the short fiber strand, simultaneously, the fed core filament is fed after being held by the pressing roller pair, and the combination of the core filament and the pressed central short fiber strand is realized in the pressing process to obtain a central body of yarn, the fiber separated from the strand is gradually and uniformly dispersed in an upper hollow cavity with the continuously increased inner diameter, then, the uniformly dispersed fiber end enters a rotating lower hollow cavity, and the fiber end is tightly attached to the cavity wall under the adsorption action of negative pressure in the lower hollow cavity on the one hand, on the other hand, the fiber end is continuously wound on the central body in a spatial three-dimensional state along with the rotation of the lower hollow cavity, and the fiber end is finally completely converged with the central body along with the gradual reduction of the inner diameter of the lower hollow cavity, so that the required vortex core-spun yarn is obtained.

2. A method of producing an eddy current core-spun yarn according to claim 1, wherein: the vortex core-spun yarn production device comprises a drafting device, a vortex twisting core-spun device and a winding device, wherein the drafting device comprises a rear roller drafting pair, a middle and front roller drafting pair, a front drafting roller pair and four rows of drafting roller pairs, the rear roller drafting pair comprises a rear lower roller and a rear upper gluing roller, the middle and rear roller drafting pair comprises a middle and rear lower roller and a middle and rear upper gluing roller, the middle and front roller drafting pair comprises a middle and front lower roller and a middle and front upper gluing roller, the front roller drafting pair comprises a front lower roller and a front upper gluing roller, the rear lower roller, the middle and front lower roller and the front lower roller are made of steel materials with solid structures, the rear upper gluing roller, the middle and front upper gluing roller and the front upper gluing roller comprise a rubber roller shaft and a rubber roller sleeve, the rubber roller shaft is made of iron materials with solid structures, the rubber roller sleeve is made of rubber materials, the rubber roller sleeve is connected with the rubber roller shaft through a bearing, so that the rubber roller sleeve can freely rotate around the rubber roller shaft, the back lower roller and the back upper sizing roller are tightly pressed with each other to form a first straight line contact jaw, the middle back lower roller and the middle back upper sizing roller are tightly pressed with each other to form a second straight line contact jaw, the middle front lower roller and the middle front upper sizing roller are tightly pressed with each other to form a first cambered surface contact jaw, the pressure between the middle front lower roller and the middle back upper sizing roller is increased and then reduced on the first cambered surface contact jaw from back to front along the fiber movement direction, the maximum pressure position between the middle front lower roller and the middle front upper sizing roller is a third straight line contact jaw in horizontal straight line distribution, the structure of the first cambered surface contact jaw is in axial symmetry distribution relative to the third straight line contact jaw, meanwhile, the pressure distribution on the first cambered surface contact jaw is also in axial symmetry distribution relative to the third straight line contact jaw, and the front lower roller and the front upper sizing roller are tightly pressed with each other to form a second cambered surface contact jaw, and the pressure between the second cambered surface contact jaw and the front upper rubber roller is increased and then reduced along the movement direction of the fiber, the maximum pressure value between the front lower roller and the front upper rubber roller is a fourth straight line contact jaw which is distributed in a horizontal straight line, the cambered surface of the second cambered surface contact jaw positioned at the rear part of the fourth straight line contact jaw is larger than the cambered surface of the front part of the straight line positioned at the maximum pressure value, so that the pressure distribution on the second cambered surface contact jaw is also identical, the vortex twisting core-spun device is positioned at the front part of the drafting device, the vortex twisting core-spun device comprises an upper fiber separating device and a lower twisting core-spun device, the upper fiber separating device is in a hollow elliptic semispherical structure, the top end and the bottom end of the upper fiber separating device are both provided with round openings, the caliber of the round opening at the bottom end is larger than the caliber of the round opening at the top end, and the caliber of the upper fiber separating device is gradually increased from top to bottom, the upper fiber separating device keeps static, an upper hole with an upward inclined opening is formed in the side face of the upper fiber separating device, the distribution density of the upper hole is gradually increased from top to bottom along the side face, a pressing roller pair is arranged on the bottom end circular face of the upper fiber separating device and comprises a pressing upper rubber roller and a pressing lower rubber roller, the pressing upper rubber roller and the pressing lower rubber roller are identical in structure and comprise a rubber roller shaft and a rubber roller sleeve, the rubber roller sleeve is connected with the rubber roller shaft through a bearing so that the rubber roller sleeve can freely rotate around the rubber roller shaft, the pressing upper rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through an upper connecting rod, the upper connecting rod is a cross rod capable of controlling extension and shortening, the pressing lower rubber roller is fixedly connected with the bottom end circular face of the upper fiber separating device through a lower connecting rod, the lower connecting rod is a cross rod capable of controlling extension and shortening, and the lower core-spun device is of a hollow elliptical hemisphere structure, the top end and the bottom end of the lower twisting core-spun device are both circular openings, the caliber of the circular opening at the bottom end is smaller than that of the circular opening at the top end, the caliber of the lower twisting core-spun device is gradually reduced from top to bottom, the top end round surface of the lower twisting core-spun device is connected with the bottom end round surface of the upper fiber separating device in a sealing manner through a bearing, the bottom end round surface of the lower twisting core-spun device is connected with the side surface in a sealing manner through a bearing, the lower twisting core-spun device is driven by a motor to rotate, the top end round surface and the side surface of the lower twisting core-spun device synchronously rotate under the driving of the motor, but the bottom end round surface of the lower twisting core-spun device is always kept static, a lower hole with a vertical opening is formed in the side surface of the lower twisting core-spun device, and the distribution density of the lower hole is kept consistent along the side surface.

3. A method of producing an eddy current core-spun yarn according to claim 1, wherein: when in use, the short fiber aggregate which generates the wrapping fiber and has certain twist is fed into the drafting system, in the drafting system, the fed short fiber aggregate is firstly held by a first linear contact jaw between a back lower roller and a back upper sizing roller, at the moment, the held short fiber aggregate held by the first linear contact jaw is driven by a rotating back roller drafting pair to realize the passive unwinding of the short fiber aggregate from a winding device and the active feeding to the drafting system, the fed short fiber aggregate is then held by a second linear contact jaw between a middle back lower roller and the middle back upper sizing roller, at the moment, in a back drafting area formed by the back roller drafting pair and the middle back roller drafting pair, the back end of the fed short fiber aggregate is held by the first linear contact jaw, and the front end is held by the second linear contact jaw, thereby the short fiber aggregate is subjected to the linear drafting action of a simple roller, under the action, when one end of the fiber in the short fiber assembly is held by the second linear contact jaw, the fiber is converted from slow motion which keeps consistent with the speed of the back roller drafting pair motion linear velocity into fast motion which keeps consistent with the speed of the middle and back roller drafting pair motion linear velocity, namely, the speed change process of the fiber is realized, and the fiber which is in contact with the fiber and is not held by the second linear contact jaw is driven by the fiber which is subjected to speed change, so that the contacted fiber is subjected to gradual speed change until the contacted fiber is held by the second linear contact jaw, fiber speed change gradient distribution is formed near the second linear contact jaw, and the fiber speed change gradient formed near the second linear contact jaw is narrower due to the narrow control range of the second linear contact jaw and the small drafting area of the back drafting area, so that the linear density of the short fiber assembly is reduced under the speed change action, simultaneously, the twist of the short fiber aggregate is partially removed due to the gradient distribution and the smaller draft multiple in the speed changing process, so that a first short fiber strand is obtained, the first short fiber strand is then held by a first cambered surface contact jaw between a middle front lower roller and a middle front upper rubber roller, at the moment, in a middle draft area formed by the middle rear roller draft pair and the middle front roller draft pair, the rear end of the first short fiber strand is held by a second linear contact jaw, the front end of the first short fiber strand is held by a first cambered surface contact jaw, so that the first short fiber strand is subjected to the single-side cambered surface draft effect, under the effect, when one end of the fiber in the first short fiber strand is held by the first cambered surface contact jaw, the fiber is firstly held by a jaw line with small pressure at the rear part of the first cambered surface contact jaw, then the holding acting force is gradually increased until the fiber is held by a third linear contact jaw at the maximum pressure, therefore, the fibers realize gradual speed change under the holding action of gradually increased pressure, the linear density of the first short fiber strand is reduced under the speed change action, and the speed change points of the fibers are different due to different magnitudes of internal friction force fields formed by friction forces of other fibers received by the fibers in the first short fiber strand, so that the speed change points in gradient distribution are formed in the first cambered surface contact jaw positioned at the rear part of the third linear contact jaw, and simultaneously, the fibers which complete speed change or the fibers which do not complete speed change but are held by the first cambered surface contact jaw drive the fibers which are in contact with the fibers but are not held by the first cambered surface contact jaw, so that the contacted fibers are subjected to gradual speed change until the fibers are held by the first cambered surface contact jaw and subjected to complete speed change, and fiber speed change gradient distribution is formed near the first cambered surface contact jaw, the fiber variable speed gradient distribution range is larger than the fiber variable speed gradient distribution at the middle and rear roller drafting pairs, the extending fiber variable speed gradient distribution range weakens the twist removing effect of the first short fiber strand in the process of reducing larger linear density, so that more residual twist is kept in the manufactured second short fiber strand, the second short fiber strand is then held by a second cambered surface contact jaw between the front lower roller and the front upper roller, at the moment, in a front drafting area formed by the middle and front roller drafting pairs, the rear end of the second short fiber strand is held by the first cambered surface contact jaw, the front end of the second short fiber strand is held by a second cambered surface contact jaw, so that the second short fiber strand is subjected to bilateral cambered surface drafting effect, under the effect, the rear end of the fiber in the second short fiber strand is held by the first cambered surface contact jaw, at the moment, the fiber is firstly held by the line at the maximum pressure point of the first cambered surface contact jaw, then the held acting force is gradually reduced until the control of the first cambered contact jaw is completely separated, so that the strand realizes the gradual separation action under the holding action of the gradually reduced pressure, thereby realizing the forward extension of the fiber control range by the first cambered contact jaw on one hand, and on the other hand, the residual twist in the output second short fiber strand can be more stably kept, when one end of the fiber in the second short fiber strand is held by the second cambered contact jaw, the fiber is firstly held by a jaw line with small pressure at the rear part of the second cambered contact jaw, then the held acting force is gradually increased until the fiber is held by a fourth linear contact jaw at the maximum pressure, thereby realizing the gradual speed change of the fiber under the holding action of the gradually increased pressure, and reducing the linear density of the second short fiber strand under the speed change action, and because the fibers in the second short fiber strand are subjected to different internal friction force fields formed by the friction forces of other fibers, the speed change points of the fibers are different, so that the speed change points of the fibers are formed in a gradient distribution manner in a second arc-surface contact jaw positioned at the rear part of a fourth linear contact jaw, and the fibers which are in speed change or are not completely speed change but are held by the second arc-surface contact jaw drive the fibers which are in contact with the fibers but are not held by the second arc-surface contact jaw, so that the contacted fibers are subjected to gradual speed change until the fibers are held by the second arc-surface contact jaw and are subjected to complete speed change, and a fiber speed change gradient distribution is formed near the second arc-surface contact jaw, at the moment, because the drafting multiple of a front drafting area is large, and the internal friction force field formed by the acting forces among the fibers in the second short fiber strand is large, the gradient distribution of larger speed change points is formed, the twist removing effect of the second short fiber strand in the process of reducing the linear density in a large range is weakened under the large drafting effect, a small amount of residual twist is kept in the prepared short fiber strand, the prepared short fiber strand is held and conveyed by a fourth linear contact jaw at the position of the maximum pressure value of the middle part of a second cambered surface contact jaw, the holding acting force is gradually reduced until the control of the second cambered surface contact jaw is completely separated, the strand is gradually separated under the holding effect of gradually reduced pressure, and the residual twist in the output short fiber strand is kept more stably; the output short fiber strand then enters the vortex twisting core-spun device, at the moment, the short fiber strand firstly enters the upper fiber separation device, one end of the fiber on the surface of the entering short fiber strand begins to separate from the strand under the adsorption action of negative pressure in the upper hole, the separated fiber end is attached to the inner wall under the action of the negative pressure which is generated in the upper hole and inclines downwards along the inner wall of the upper fiber separation device and moves downwards along the inner wall, the fiber end begins to be uniformly dispersed along the gradually increased inner wall surface along with the gradual increase of the caliber of the upper fiber separation device and the increase of the distribution density of the upper hole in the downward movement process, meanwhile, only part of the fiber end in the short fiber strand is separated due to certain twist degree remained in the short fiber strand, and the rest fiber is still completely positioned in the strand, so that a central strand is formed, and in the process that the separated fiber end moves downwards along the inner wall of the upper fiber separation device, the central fiber strand also moves downwards along the cavity of the upper fiber separating device, the downward movement speed of the central fiber strand is slightly less than the downward movement speed of the separated fiber end, so that the downward movement speed of the separated fiber end relative to the central fiber strand is generated in the upper fiber separating device, the length of the separated fiber end separated from the central fiber strand is increased under the relative movement, when the central fiber strand moves to the bottom end of the upper fiber separating device, the central fiber strand is tightly pressed between the pressing upper rubber roller and the pressing lower rubber roller of the pressing roller pair, the process of separating the fiber end from the central fiber strand is stopped under the pressing action, so that the fiber at the separated fiber end cannot be completely separated from the central fiber strand, namely, one end of the fiber at the separated fiber end is separated from the central fiber strand, the other end of the fiber is positioned in the central fiber strand, in the process, when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be consistent with the height of the conveyed central fiber strip, the separation movement of the fiber end is stopped instantly at the pressing point of the pressed roller pair of the central fiber strip, when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be larger than the height of the conveyed central fiber strip, the central fiber strip can move upwards in a climbing manner before entering the pressing point, so that the separation process of the fiber end from the central fiber strip is slowed down until the top end cambered surface enters the pressing point, the separation length of the fiber end from the central fiber strip is reduced, and when the length of the upper connecting rod enables the top end cambered surface of the rubber roller sleeve pressing the rubber roller to be smaller than the height of the conveyed central fiber strip, the central fiber strip can move upwards in a descending manner before entering the pressing point, so that the process that the fiber end is separated from the central strand is accelerated until the fiber end enters the pressing point and stops completely, the length of the fiber where the separated fiber end is located is increased, the control of the fiber separation motion is realized through the length adjustment of the upper connecting rod, the length of the lower connecting rod is adaptively changed in the length change process of the upper connecting rod, so that the pressing upper rubber roller and the pressing lower rubber roller are kept in a tight pressing state all the time, meanwhile, the core filament wound on the bobbin is actively unwound after being driven by the driving roller, the unwound core filament is pressed by the pressing roller pair with certain tension after passing through the yarn guiding device, the core filament is pressed into the central strand under the pressing action to obtain a central yarn body, so that the combination of the core filament and the central strand is realized, the pressed and output central yarn body and the separated fiber end enter the lower twisting core-wrapping device immediately by the pressing roller pair, the fiber end entering the lower twisting core-spun device is tightly attached to the inner wall of the lower twisting core-spun device under the adsorption action generated by the negative pressure in the lower hole, in the process, because the negative pressure action is not generated at the connecting section of the upper fiber separating device and the lower twisting core-spun device, the fiber end naturally droops into the lower twisting core-spun device under the self gravity, then the fiber end is uniformly dispersed and attached to the inner wall of the lower twisting core-spun device according to the self length under the action of the vertical negative pressure generated in the lower hole, at the moment, the fiber end attached to the inner wall is wrapped on the central yarn body along with the rotation of the lower twisting core-spun device, and along with the reduction of the caliber of the lower twisting core-spun device, the inner wall of the lower twisting core-spun device is gradually reduced, and then the fiber end is tightly attached and wrapped on the central yarn body step by step until the fiber end moves to the bottom end round surface of the lower twisting core-spun device, then the required vortex core-spun yarn is obtained, the round surface at the bottom end keeps static and the caliber is small, so that the whole compact extrusion and fixation effect is generated on the prepared vortex core-spun yarn; the manufactured vortex core-spun yarn is continuously wound on a yarn barrel through a winding device, the yarn barrel is fixedly nested on a copper pipe, the copper pipe is driven by an independent motor to rotate at a constant speed, then the yarn barrel is driven to rotate correspondingly, a circulating swing device is arranged above the copper pipe, the manufactured vortex core-spun yarn passes through the circulating swing device and then is wound on the yarn barrel, and the vortex core-spun yarn is uniformly wound on the yarn barrel in parallel through the periodic circulating reciprocating motion of the circulating swing device along the length direction of the yarn barrel.

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