A method of spinning a multi-composite yarn

Abstract

The application discloses a multiple composite yarn spinning method, which adopts four single-drive rollers, a rubber roller with rubber roller sleeves added to the left and right of a back upper flat roller, and a roller with a roller sleeve added to the middle of a back lower roller, and includes single roving feeding spinning, double roving feeding spinning and triple roving feeding spinning, and single roving feeding, double roving feeding and triple roving feeding are selected respectively, each roving fed can be selected to undergo two-group independent two-zone drafting processes, and then the production of fancy yarns with different effects is realized, the variety of yarns is enriched, the added value of the yarns is improved, and in the drafting process, the drafting effect is improved and the yarn quality is improved by the additional friction force field of the middle and back upper rubber roller and the additional friction force field of the back lower roller.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spinning technology, in particular to a multi-composite yarn spinning method. BACKGROUND

[0002] With the continuous advancement of the times, people's requirements for clothing fabrics are constantly improving, and the textile and garment industry is currently in an era of pursuing fashion, diversification and high quality. Therefore, new requirements have been put forward for the development of textile raw materials, among which fancy yarns have gradually entered people's field of vision and occupy an irreplaceable position. Fancy yarns refer to yarns with special structures and appearance effects obtained by processing fibers or yarns with special raw materials, special equipment or special processes during spinning and making. Fancy yarns are a kind of yarns with decorative effect in yarn products. The unique structure, flexible modeling, rich color performance and diversified use of raw materials of fancy yarns are creative, which makes it easy to update fancy yarn products and produce more differentiated textile products. In today's era of pursuing individualized consumption, the market gives fancy yarns a broad space. Among them, segment color yarn is a kind of fancy yarn that is widely researched and applied at present, which has a new style of multi-color combination. It not only has thickness changes in the axial direction of the yarn, but also has discontinuous distribution of alternating fancy colors, showing irregular and unique color effects. At present, segment color yarn production is mainly realized by modification on traditional spinning machines with three rollers. White roving is continuously fed by the middle roller, one color auxiliary yarn is intermittently fed by the rear roller, and the two rovings are combined at the outlet of the front roller to produce segment color effect. This method has low modification cost and high efficiency, but the yarn evenness is poor. In view of this, a segment color yarn production device with four rollers is given in Chinese patent "Segment color spinning transmission device (Patent No. ZL200420081737.2)", but this device still uses double roving feeding, and the first roller and the second roller are still controlled by the same motor, so the main draft cannot be freely adjusted. SUMMARY

[0003] The purpose of the present application is to provide a multi-composite yarn spinning method to solve the problems in the prior art, realize independent double-zone drafting process of three rovings fed into two groups, and then realize the production of multi-structure composite yarns with different effects, enrich the variety of yarns, improve the added value of yarns, and improve the drafting effect and yarn quality by applying additional friction force field of middle and rear top rubber-covered rollers and rear lower roller in the drafting process.

[0004] The application provides a multiple composite yarn spinning method, which adopts a multiple composite yarn spinning device, and comprises a back roller drafting pair composed of a back lower roller and a back upper rubber-covered roller, a middle back roller drafting pair composed of a middle back lower roller and a middle back upper rubber-covered roller, a middle front roller drafting pair composed of a middle front lower roller and a middle front upper rubber-covered roller, and a front roller drafting pair composed of a front lower roller and a front upper rubber-covered roller, and comprises single roving feeding spinning, double roving feeding spinning and triple roving feeding spinning.

[0005] In the single roving feeding spinning, the single roving is hindered by the lower hindering friction force of the stationary back lower roller, and the fibers in the roving are hindered by the lower hindering friction field, so that part of the fibers in the roving are further straightened backward.

[0006] In the double roving feeding spinning, the two rovings fed with a certain interval are hindered by the upper hindering friction force of the middle back upper rubber-covered roller rotating from stationary to passive, and the fibers in the rovings are hindered by the upper hindering friction field, so that part of the fibers in the rovings are further straightened backward.

[0007] In the triple roving feeding spinning, when the linear speed of the middle back lower roller is greater than that of the back lower roller, the two rovings on the two sides are promoted by the upper promoting friction force of the rotating middle back upper rubber-covered roller, and the fibers in the rovings are promoted by the upper promoting friction field, so that the fibers in the rovings change from the slow motion consistent with the speed of the back lower roller to the preliminary fast motion consistent with the speed of the middle back upper rubber-covered roller, realizing the twice speed change of the rovings in the back drafting area, the middle roving is hindered by the lower relative hindering friction force of the rotating back lower roller, and the fibers in the roving are hindered by the lower relative hindering friction field, so that part of the fibers in the roving are further straightened backward, realizing the uniform and concentrated speed change of the roving in the back drafting area.

[0008] When the linear speed of the middle back lower roller is less than that of the back lower roller, the two rovings on the two sides are hindered by the upper relative hindering friction force of the rotating middle back upper rubber-covered roller, and the fibers in the rovings are hindered by the upper relative hindering friction field, so that part of the fibers in the rovings are further straightened backward, realizing the uniform and concentrated speed change of the rovings in the back drafting area, the middle roving is promoted by the lower relative promoting friction force of the rotating back lower roller, and the fibers in the roving are promoted by the lower relative promoting friction field, so that part of the fibers in the roving are further straightened forward, realizing the uniform and concentrated speed change of the roving in the back drafting area.

[0009] The multi-composite yarn spinning method as described above, preferably, the rear top rubber-covered roll, the middle-rear top rubber-covered roll, the middle-front top rubber-covered roll and the front top rubber-covered roll comprise a rubber-covered roll shaft, a left-rear rubber-covered roll sleeve and a right-rear rubber-covered roll sleeve are sleeved on the rubber-covered roll shaft of the rear top rubber-covered roll and kept a certain distance apart by bearings, a middle-rear rubber-covered roll sleeve, a middle-front rubber-covered roll sleeve and a front rubber-covered roll sleeve are respectively sleeved on the rubber-covered roll shafts of the middle-rear top rubber-covered roll, the middle-front top rubber-covered roll and the front top rubber-covered roll by bearings, and the lengths of the sleeves are equal to the length of the left-rear rubber-covered roll sleeve, the length of the right-rear rubber-covered roll sleeve and the sum of the distance between the left-rear rubber-covered roll sleeve and the right-rear rubber-covered roll sleeve, the rear bottom roller, the middle-rear bottom roller, the middle-front bottom roller and the front bottom roller comprise a roller shaft, a rear roller sleeve, a middle-front roller sleeve and a front roller sleeve are respectively fixed on the roller shafts of the rear bottom roller, the middle-front bottom roller and the front bottom roller by bearings, and the lengths of the sleeves are consistent with the lengths of the middle-rear rubber-covered roll sleeve, the middle-front rubber-covered roll sleeve and the front rubber-covered roll sleeve, and a middle-rear bottom roller sleeve is fixed on the middle-rear bottom roller and has a length equal to the distance between the left-rear rubber-covered roll sleeve and the right-rear rubber-covered roll sleeve.

[0010] The multi-composite yarn spinning method as described above, preferably, after the pressing assembly is pressed, the left-rear rubber-covered roll sleeve and the right-rear rubber-covered roll sleeve are tightly pressed with the rear roller sleeve, the rubber-covered roll shafts between the left-rear rubber-covered roll sleeve and the right-rear rubber-covered roll sleeve are kept suspended with the rear roller sleeve, the middle-rear rubber-covered roll sleeve is tightly pressed with the middle-rear roller sleeve, the middle-rear roller sleeve is kept suspended with the roller shaft of the middle-rear bottom roller on the left side of the middle-rear roller sleeve and with the roller shaft of the middle-rear bottom roller on the right side of the middle-rear roller sleeve, the middle-front rubber-covered roll sleeve is tightly pressed with the middle-front roller sleeve, and the front rubber-covered roll sleeve is tightly pressed with the front roller sleeve.

[0011] The multi-composite yarn spinning method as described above, preferably, single roving feeding is adopted in spinning, a separate third roving passes through the space between the rubber-covered roll shafts between the left-rear rubber-covered roll sleeve and the right-rear rubber-covered roll sleeve and the rear roller sleeve, is then fed and pressed between the middle-rear roller sleeve and the middle-rear rubber-covered roll sleeve, is then pressed and passes through between the middle-front roller sleeve and the middle-front rubber-covered roll sleeve, is subjected to the drafting action of a second rear drafting zone composed of the middle-rear roller drafting pair and the middle-front roller drafting pair, is finally output between the front roller sleeve and the front rubber-covered roll sleeve, is subjected to the drafting action of a front drafting zone composed of the middle-front roller drafting pair and the front roller drafting pair, and a third sliver is obtained.

[0012] The multi-composite yarn spinning method as claimed in claim 1, wherein preferably, two roving yarns are fed into the spinning, and the first roving yarn and the second roving yarn are pressed to be fed between the left rear rubber-covered roller sleeve and the rear roller sleeve and the right rear rubber-covered roller sleeve and the rear roller sleeve, respectively, and then slip through between the roller shafts of the middle rear lower roller on the left side of the middle rear roller sleeve and the middle rear roller sleeve and the roller shafts of the middle rear lower roller on the right side of the middle rear roller sleeve and the middle rear roller sleeve, and then are pressed to pass through between the middle front roller sleeve and the middle front rubber-covered roller sleeve, and are subjected to drafting action of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally are pressed to be output between the front roller sleeve and the front rubber-covered roller sleeve, and are subjected to drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, and the first sliver and the second sliver are obtained, respectively.

[0013] The multi-composite yarn spinning method as claimed in claim 1, wherein preferably, three roving yarns are fed into the spinning, and the first roving yarn and the second roving yarn are pressed to be fed between the left rear rubber-covered roller sleeve and the rear roller sleeve and the right rear rubber-covered roller sleeve and the rear roller sleeve, respectively, and then slip through between the roller shafts of the middle rear lower roller on the left side of the middle rear roller sleeve and the middle rear roller sleeve and the roller shafts of the middle rear lower roller on the right side of the middle rear roller sleeve and the middle rear roller sleeve, and then are pressed to pass through between the middle front roller sleeve and the middle front rubber-covered roller sleeve, and are subjected to drafting action of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally are pressed to be output between the front roller sleeve and the front rubber-covered roller sleeve, and are subjected to drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, and the first sliver and the second sliver are obtained, respectively; and the third roving yarn slips through between the rubber-covered roller shafts between the left rear rubber-covered roller sleeve and the right rear rubber-covered roller sleeve and the rear roller sleeve, and then is pressed to be fed between the middle rear roller sleeve and the middle rear rubber-covered roller sleeve, and then is pressed to pass through between the middle front roller sleeve and the middle front rubber-covered roller sleeve, and is subjected to drafting action of the second rear drafting zone composed of the middle rear roller drafting pair and the middle front roller drafting pair, and finally is pressed to be output between the front roller sleeve and the front rubber-covered roller sleeve, and is subjected to drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, and the third sliver is obtained.

[0014] The multi-composite yarn spinning method as claimed in claim 1, wherein preferably, the first roving yarn, the second roving yarn and the third roving yarn are the same or different roving yarns.

[0015] The multi-composite yarn spinning method as claimed in claim 1, wherein preferably, two roving yarns are fed into the spinning, and the first sliver and the second sliver output under the effect of the twist transferred first are twisted into the first sub-yarn and the second sub-yarn, respectively, and then the first sub-yarn and the second sub-yarn are symmetrically interlaced and combined into a Siro yarn with a certain strength, or are asymmetrically interlaced and combined into a Siro yarn with a certain strength.

[0016] The multiple composite yarn spinning method as described above, preferably, three roving yarns are fed into the spinning, and the output first, second and third strands are first twisted into first, second and third sub-yarns under the effect of the twist transferred, and then the first and second sub-yarns are symmetrically interlaced with the third sub-yarn in the middle, or the third sub-yarn in the middle is asymmetrically interlaced with the first and second sub-yarns to form a combined yarn with a certain strength.

[0017] The multiple composite yarn spinning method as described above, preferably, the left rear rubber sleeve length, the right rear rubber sleeve length and the interval between the left rear rubber sleeve and the right rear rubber sleeve are the same.

[0018] Compared with the prior art, the application adopts four single-driven roller columns, the rear upper cover roller adopts rubber sleeves, the middle rear lower roller adopts a roller sleeve, the three roving yarns are divided into two groups to complete independent double-zone drafting processes, different effect fancy yarns are produced, the variety of yarns is enriched, the added value of the yarns is improved, the drafting effect is improved and the yarn quality is improved by the additional friction field of the middle rear upper rubber roller and the additional friction field of the rear lower roller. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic diagram of the multiple composite yarn spinning device of the application.

[0020] The reference signs are explained as follows: 1-first roving yarn, 2-second roving yarn, 3-third roving yarn, 4-rear lower roller, 5-rear upper rubber roller, 6-middle rear lower roller, 7-middle rear upper rubber roller, 8-middle front lower roller, 9-middle front upper rubber roller, 10-front lower roller, 11-front upper rubber roller, 12-first servo motor, 13-second servo motor, 14-third servo motor, 15-fourth servo motor, 16-programmable logic controller, 17-yarn guide hook, 18-traveler, 19-ring, 20-yarn tube, 21-rubber roller shaft, 22-right rear rubber sleeve, 23-left rear rubber sleeve, 24-roller shaft, 25-middle rear roller sleeve. DETAILED DESCRIPTION

[0021] The embodiments described below with reference to the drawings are exemplary and are only used to explain the application, and cannot be explained as a limitation of the application.

[0022] The application provides a multiple composite yarn spinning method, three roving yarns are divided into two groups to complete independent double-zone drafting processes, different effect multiple structure composite yarns are produced, the variety of yarns is enriched, the added value of the yarns is improved, the drafting effect is improved and the yarn quality is improved by the additional friction field of the middle rear upper rubber roller 7 and the rear lower roller 4.

[0023] To achieve the above object, the present application relates to a multiple composite yarn spinning device, referring to Figure 1As shown, the multiple composite yarn spinning device includes four rows of drafting roller pairs: a back roller drafting pair composed of a back lower roller 4 and a back upper rubber-covered roller 5, a middle back roller drafting pair composed of a middle back lower roller 6 and a middle back upper rubber-covered roller 7, a middle front roller drafting pair composed of a middle front lower roller 8 and a middle front upper rubber-covered roller 9, a front roller drafting pair composed of a front lower roller 10 and a front upper rubber-covered roller 11, the back upper rubber-covered roller 5, the middle back upper rubber-covered roller 7, the middle front upper rubber-covered roller 9, and the front upper rubber-covered roller 11 include rubber-covered roller shafts 21, the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 are sleeved on the rubber-covered roller shaft 21 of the back upper rubber-covered roller 5, the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 are the same in structure, the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 are made of rubber and are connected with the rubber-covered roller shaft 21 of the back upper rubber-covered roller 5 through bearings, so that the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 can rotate freely around the rubber-covered roller shaft 21 of the back upper rubber-covered roller 5, the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 maintain a certain distance, the length of the left back rubber-covered roller sleeve 23, the length of the right back rubber-covered roller sleeve 22, and the distance between the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22 are the same, a middle back rubber-covered roller sleeve is sleeved on the rubber-covered roller shaft 21 of the middle back upper rubber-covered roller 7, the middle back rubber-covered roller sleeve and the rubber-covered roller shaft 21 of the middle back upper rubber-covered roller 7 are connected through bearings, so that the middle back rubber-covered roller sleeve can rotate freely around the rubber-covered roller shaft 21 of the middle back upper rubber-covered roller 7, the length of the middle back rubber-covered roller sleeve is equal to the sum of the length of the left back rubber-covered roller sleeve 23, the length of the right back rubber-covered roller sleeve 22, and the distance between the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22, a middle front rubber-covered roller sleeve is sleeved on the rubber-covered roller shaft 21 of the middle front upper rubber-covered roller 9, the middle front rubber-covered roller sleeve and the rubber-covered roller shaft 21 of the middle front upper rubber-covered roller 9 are connected through bearings, so that the middle front rubber-covered roller sleeve can rotate freely around the rubber-covered roller shaft 21 of the middle front upper rubber-covered roller 9, the length of the middle front rubber-covered roller sleeve is equal to the length of the middle back rubber-covered roller sleeve, a front rubber-covered roller sleeve is sleeved on the rubber-covered roller shaft 21 of the front upper rubber-covered roller 11, the front rubber-covered roller sleeve and the rubber-covered roller shaft 21 of the front upper rubber-covered roller 11 are connected through bearings, so that the front rubber-covered roller sleeve can rotate freely around the rubber-covered roller shaft 21 of the front upper rubber-covered roller 11, the length of the front rubber-covered roller sleeve is equal to the length of the middle front rubber-covered roller sleeve, the back lower roller 4, the middle back lower roller 6, the middle front lower roller 8, and the front lower roller 10 include roller shafts 24, a back roller sleeve is sleeved on the roller shaft 24 of the back lower roller 4, the back roller sleeve and the roller shaft 24 of the back lower roller 4 are the same in material and are integrally fixedly connected, the length of the back roller sleeve is equal to the sum of the length of the left back rubber-covered roller sleeve 23, the length of the right back rubber-covered roller sleeve 22, and the distance between the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22, a middle back roller sleeve 25 is sleeved on the middle part of the roller shaft 24 of the middle back lower roller 6, the middle back roller sleeve 25 and the roller shaft 24 of the middle back lower roller 6 are the same in material and are integrally fixedly connected, the length of the middle back roller sleeve 25 is equal to the distance between the left back rubber-covered roller sleeve 23 and the right back rubber-covered roller sleeve 22, a middle front roller sleeve is sleeved on the roller shaft 24 of the middle front lower roller 8, the middle front roller sleeve and the roller shaft 24 of the middle front lower roller 8 are the same in material and are integrally fixedly connected, the length of the middle front roller sleeve is equal to the length of the back roller sleeve,The front roller sleeve is sleeved on the roller shaft 24 of the front lower roller 10, and is integrally fixedly connected with the roller shaft 24 of the front lower roller 10 and has the same material as the roller shaft 24 of the front lower roller 10. The length of the front roller sleeve is equal to the length of the rear roller sleeve. The roller shaft 24 of the rear lower roller 4 is driven to rotate by the first servo motor 12. The roller shaft 24 of the middle rear lower roller 6 is driven to rotate by the second servo motor 13. The roller shaft 24 of the middle front lower roller 8 is driven to rotate by the third servo motor 14. The roller shaft 24 of the front lower roller 10 is driven to rotate by the fourth servo motor 15. The first servo motor 12, the second servo motor 13, the third servo motor 14, and the fourth servo motor 15 are connected through the programmable logic controller 16.

[0024] When spinning, the pressure assembly is pressed, so that the left rear rubber roller sleeve 23 and the right rear rubber roller sleeve 22 are tightly pressed between the rear roller sleeve, the rubber roller shaft 21 between the left rear rubber roller sleeve 23 and the right rear rubber roller sleeve 22 is kept suspended between the rear roller sleeve, the middle rear rubber roller sleeve is tightly pressed between the middle rear roller sleeve 25, the middle rear roller sleeve 25 and the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller sleeve 25, and the middle rear roller sleeve 25 and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller sleeve 25 are all kept suspended, the middle front rubber roller sleeve is tightly pressed between the middle front roller sleeve, the front rubber roller sleeve is tightly pressed between the front roller sleeve, the first roving 1 and the second roving 2 are respectively fed by the pressing between the left rear rubber roller sleeve 23, the right rear rubber roller sleeve 22 and the rear roller sleeve, and then slip through the suspension between the middle rear rubber roller sleeve and the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller sleeve 25, the middle rear rubber roller sleeve and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller sleeve 25, and then pass through the pressing between the middle front roller sleeve and the middle front rubber roller sleeve, and are subjected to the drafting action of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally are output by the pressing between the front roller sleeve and the front rubber roller sleeve, subjected to the drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, and respectively obtain the first sliver and the second sliver; the third roving 3 slips through the suspension between the rubber roller shaft 21 between the left rear rubber roller sleeve 23 and the right rear rubber roller sleeve 22 and the rear roller sleeve, and then is fed by the pressing between the middle rear roller sleeve 25 and the middle rear rubber roller sleeve, and then passes through the pressing between the middle front roller sleeve and the middle front rubber roller sleeve, subjected to the drafting action of the second rear drafting zone composed of the middle rear roller drafting pair and the middle front roller drafting pair, and finally is output by the pressing between the front roller sleeve and the front rubber roller sleeve, subjected to the drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, and obtains the third sliver. The first roving 1 and the second roving 2 are the same roving, and the first roving 1, the second roving 2 and the third roving 3 are the same or different rovings.

[0025] The application also relates to a multiple composite yarn spinning method, including single roving feeding spinning, double roving feeding spinning and triple roving feeding spinning, wherein the fourth servo motor 15 drives the front roller to rotate, and the rotation of the front roller is determined by the spindle rotation linear speed and the designed twist.

[0026] In the single roving feeding spinning, the third roving 3 is fed through the gap between the rubber roller shaft 21 and the back roller sleeve from the left back rubber roller sleeve 23 to the right back rubber roller sleeve 22, and then pressed through the gap between the middle back rubber roller sleeve and the middle back roller sleeve 25, and then pressed through the gap between the middle front rubber roller sleeve and the middle front roller sleeve, stretched by the second back drafting zone composed of the middle back roller drafting pair and the middle front roller drafting pair, and finally output from the gap between the front rubber roller sleeve and the front roller sleeve, stretched by the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, to obtain the third sliver.

[0027] In the double roving feeding spinning, the first roving 1 and the second roving 2 are simultaneously fed through the gap between the left back rubber roller sleeve 23 and the back roller sleeve, and then respectively fed through the gap between the middle back rubber roller sleeve and the roller shaft 24 of the middle back lower roller 6 on the left side of the middle back roller sleeve 25, and then respectively fed through the gap between the middle front rubber roller sleeve and the roller shaft 24 of the middle front lower roller 6 on the right side of the middle front roller sleeve 25, stretched by the first back drafting zone composed of the back roller drafting pair and the middle front roller drafting pair, and finally output from the gap between the front rubber roller sleeve and the front roller sleeve, stretched by the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, to obtain the first sliver and the second sliver.

[0028] In the three-rough spinning, the first and second rough yarns 1, 2 are pressed to feed between the left and right back rubber roller sleeves 23, 22 and the back roller sleeve, and then slip through between the middle back rubber roller sleeve and the roller shaft 24 of the middle back lower roller 6 on the left side of the middle back roller sleeve 25, and then slip through between the middle back rubber roller sleeve and the roller shaft 24 of the middle back lower roller 6 on the right side of the middle back roller sleeve 25, and then press to feed between the middle front roller sleeve and the middle front rubber roller sleeve, and then pass through the first back drafting zone formed by the back roller drafting pair and the middle front roller drafting pair, and finally press to output between the front roller sleeve and the front rubber roller sleeve, and then pass through the front drafting zone formed by the middle front roller drafting pair and the front roller drafting pair, to obtain the first and second slivers, respectively; meanwhile, the third rough yarn 3 slips through between the rubber roller shaft 21 between the left and right back rubber roller sleeves 23, 22 and the back roller sleeve, and then is pressed to feed between the middle back roller sleeve 25 and the middle back rubber roller sleeve, and then press to feed between the middle front roller sleeve and the middle front rubber roller sleeve, and then pass through the second back drafting zone formed by the middle back roller drafting pair and the middle front roller drafting pair, and finally press to output between the front roller sleeve and the front rubber roller sleeve, and then pass through the front drafting zone formed by the middle front roller drafting pair and the front roller drafting pair, to obtain the third sliver.

[0029] In the spinning, the main motor drives the spindle to rotate through the spindle belt, and then drives the bobbin 20 to rotate to generate twist which is transmitted from bottom to top, so that the third sliver, or the first and second slivers, or the first, second and third slivers obtained after drafting rotate around their own axes, and the third sliver output alone is directly made into a single spun yarn with a certain strength under the action of twisting; or the first and second slivers output simultaneously are first twisted into first and second sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically interlaced and cabled with each other or asymmetrically interlaced and cabled with each other into a certain strength of a siro yarn; or the first, second and third slivers output simultaneously are first twisted into first, second and third sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically interlaced and cabled with each other about the middle third sub-yarn or asymmetrically interlaced and cabled with each other about the middle third sub-yarn into a certain strength of a cabled yarn; the spun yarn is wound on the bobbin 20 after passing through the guide hook 17 and the traveller 18, and the bobbin 20 drives the traveller 18 to rotate around the ring 19, and since the linear speed of the traveller 18 is less than that of the bobbin 20, the spun yarn is continuously wound on the bobbin 20.

[0030] The above detailed description of the structure, features and effects of the present application is based on the embodiments shown in the drawings. The above description is only the preferred embodiments of the present application, but the present application is not limited to the embodiments shown in the drawings. Any changes or modifications made in accordance with the concept of the present application, or equivalent embodiments with equivalent changes, are still within the scope of the present application.

Claims

1. A method for spinning multiple composite yarns, employing a multiple composite yarn spinning apparatus, comprising a rear roller drafting pair consisting of a rear lower roller and a rear upper roller, a middle rear roller drafting pair consisting of a middle rear lower roller and a middle rear upper roller, a middle front roller drafting pair consisting of a middle front lower roller and a middle front upper roller, and a front roller drafting pair consisting of a front lower roller and a front upper roller, including single roving feeding spinning, double roving feeding spinning, and triple roving feeding spinning, characterized in that: The upper rear rubber roller includes left and right rear rubber roller sleeves that maintain a certain distance, and the lower middle rear roller includes a middle rear roller sleeve whose length is equal to the distance between the left and right rear rubber roller sleeves. When a single roving is fed into the spinning process, the single roving is subjected to a downward frictional force that hinders the movement generated by the stationary lower roller. This downward frictional force field is generated on the fibers in the roving, causing some of the fibers in the roving to be straightened further backward. When two identical rovings are fed into the spinning process, they are fed at a certain distance and experience the same draft ratio and draft distribution. During this process, they are subjected to the upper resistance friction force of the middle and rear upper rubber rollers, which rotate from a stationary state to a passive state. This generates an upper resistance friction force field on the fibers in the rovings, causing some of the fibers in the rovings to be further straightened backward. When two rovings are fed into the spinning process, the first and second slivers output simultaneously are twisted into first and second sub-yarns by the twist transmitted from them. Then, the first and second sub-yarns are symmetrically intertwined or asymmetrically intertwined to form Siro yarn with a certain strength. When three rovings are fed into the spinning process, and the rotational linear speed of the middle and lower rollers is greater than that of the lower rollers, the two identical rovings on both sides experience the same draft ratio and draft distribution process. During this process, they are subjected to the upward promoting frictional force of the rotating middle and upper rollers, which generates an upward promoting frictional force field on the fibers in the rovings. This causes the fibers in the rovings to change from a slow motion that keeps pace with the speed of the lower rollers to a preparatory fast motion that keeps pace with the speed of the middle and upper rollers. This achieves two speed changes for the rovings in their respective rear drafting zones. The middle roving is subjected to the downward relative resistance frictional force of the rotating lower rollers, which generates a downward relative resistance frictional force field on the fibers in the rovings. This causes some of the fibers in the rovings to straighten further backward, achieving uniform and concentrated speed changes for the rovings in their respective rear drafting zones. When the rotational linear speed of the middle and lower rollers is less than that of the lower rollers, the two identical rovings on both sides experience the same draft ratio and draft distribution process. During this process, they are subjected to the upper relative resistance friction force of the rotating middle and lower rollers, which generates an upper relative resistance friction field on the fibers in the rovings. This causes the fibers in the rovings to straighten further backward, achieving uniform and concentrated speed change of the rovings in their respective rear drafting zones. The middle roving is subjected to the lower relative promotion friction force of the rotating lower rollers, which generates a lower relative promotion friction field on the fibers in the rovings. This causes some of the fibers in the rovings to straighten further forward, achieving uniform and concentrated speed change of the rovings in their respective rear drafting zones. When three rovings are fed into the spinning mill, the first, second, and third slivers that are output simultaneously are twisted into first, second, and third sub-yarns by the transmitted twist. Then, the first and second sub-yarns are symmetrically intertwined with the middle third sub-yarn or asymmetrically intertwined with the middle third sub-yarn to form a plied yarn with a certain strength.

2. The method for spinning multiple composite yarns according to claim 1, characterized in that: The rear upper rubber roller, middle rear upper rubber roller, middle front upper rubber roller, and front upper rubber roller all include rubber roller shafts. A left rear rubber roller sleeve and a right rear rubber roller sleeve are fitted onto the rubber roller shaft of the rear upper rubber roller at a certain distance via bearings. A middle rear rubber roller sleeve and a middle front rubber roller sleeve are respectively fitted onto the rubber roller shafts of the middle rear upper rubber roller, middle front upper rubber roller, and front upper rubber roller via bearings. The lengths of these rollers are equal to the sum of the lengths of the left and right rear rubber roller sleeves and the distance between the left and right rear rubber roller sleeves. The system includes a front roller sleeve, a rear lower roller, a middle rear lower roller, a middle front lower roller, and a front lower roller, each with a roller shaft. A rear roller sleeve, a middle front roller sleeve, and a front roller sleeve, each with a length equal to that of the middle rear roller sleeve, the middle front roller sleeve, and the front roller sleeve, are respectively fixed on the roller shafts of the rear lower roller, the middle front lower roller, and the front lower roller. A middle rear roller sleeve, with a length equal to the distance between the left and right rear roller sleeves, is fixed on the middle rear lower roller.

3. The method for spinning multiple composite yarns according to claim 2, characterized in that: After the pressure assembly is pressed, the left and right rear rubber roller sleeves are pressed tightly against the rear roller sleeve. The rubber roller shaft between the left and right rear rubber roller sleeves remains suspended from the rear roller sleeve. The middle and rear rubber roller sleeves are pressed tightly against the middle and rear roller sleeves. The middle and rear roller sleeves remain suspended from the roller shaft of the middle and rear lower roller on the left side of the middle and rear roller sleeve, and from the roller shaft of the middle and rear lower roller on the right side of the middle and rear roller sleeve. The middle and front rubber roller sleeves are pressed tightly against each other, and the front rubber roller sleeves are pressed tightly against each other.

4. The method for spinning multiple composite yarns according to claim 2, characterized in that: In the single roving feeding process, a separate third roving is fed through the roller shaft between the left and right rear roller sleeves and the rear roller sleeve, suspended in mid-air. It is then pressed in between the middle rear roller sleeve and the middle rear roller sleeve, and then pressed through between the middle front roller sleeve and the middle front roller sleeve. It is subjected to the drafting action of the second rear drafting zone composed of the middle rear roller drafting pair and the middle front roller drafting pair. Finally, it is pressed out between the front roller sleeve and the front roller sleeve, and is subjected to the drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, thus obtaining the third sliver.

5. The method for spinning multiple composite yarns according to claim 2, characterized in that: In the spinning process, the first roving and the second roving are simultaneously fed in by pressing between the left rear rubber roller sleeve and the right rear rubber roller sleeve and the rear roller sleeve, respectively. Then, they slide through the middle rear rubber roller sleeve and the roller shaft of the middle rear lower roller on the left side of the middle rear roller sleeve, and between the middle rear rubber roller sleeve and the roller shaft of the middle rear lower roller on the right side of the middle rear roller sleeve, respectively. Then, they are pressed through the middle front roller sleeve and the middle front rubber roller sleeve, and are stretched by the first rear stretching zone composed of the rear roller stretching pair and the middle front roller stretching pair. Finally, they are pressed out by the front roller sleeve and the front rubber roller sleeve, and are stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, respectively, to obtain the first sliver and the second sliver.

6. The method for spinning multiple composite yarns according to claim 2, characterized in that: In the three-roving feeding process, the first and second rovings are fed in through pressing between the left and right rear roller sleeves and the rear roller sleeve, respectively. They then slide freely between the middle rear roller sleeve and the roller shaft of the lower middle rear roller on the left side of the middle rear roller sleeve, and between the middle rear roller sleeve and the roller shaft of the lower middle rear roller on the right side of the middle rear roller sleeve. Next, they are pressed between the middle front roller sleeve and the middle front roller sleeve, where they are subjected to the drafting action of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair. Finally, they are pressed out between the front roller sleeve and the front roller sleeve, where they are subjected to the drafting action of the middle front roller drafting pair and the front roller drafting pair. The drafting action of the front drafting zone produces the first and second slivers respectively. Simultaneously, the third roving is fed through the roller shaft between the left and right rear roller sleeves and the rear roller sleeve, then pressed in between the middle rear roller sleeve and the middle rear roller sleeve, and then pressed through between the middle front roller sleeve and the middle front roller sleeve. It is subjected to the drafting action of the second rear drafting zone composed of the middle rear roller drafting pair and the middle front roller drafting pair. Finally, it is pressed out between the front roller sleeve and the front roller sleeve, and subjected to the drafting action of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, to produce the third sliver.

7. The method for spinning multiple composite yarns according to claim 6, characterized in that: The first roving, the second roving, and the third roving may be the same or different rovings.

8. A method for spinning multiple composite yarns according to claim 2, characterized in that: The lengths of the left and right rear rubber roller sleeves are the same, as are the spacing between them.

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