Multi-composite yarn spinning method

Abstract

The invention discloses a multi-composite yarn spinning method, which adopts four rows of rollers in independent transmission, a rear upper leather roller adopts a rubber roller of which the left and right are additionally provided with rubber roller sleeves, a middle rear lower roller adopts a roller of which the middle is additionally provided with a roller sleeve, and the method comprises single roving feeding spinning, double roving feeding spinning and three roving feeding spinning. Single roving feeding, two roving feeding and three roving feeding are respectively selected, so that each fed roving can be selectively subjected to two groups of independent double-area drafting processes, the production of fancy yarns with different effects is realized, the varieties of the yarns are enriched, the additional value of the yarns is improved, and the production cost is reduced. And in the drafting process, an additional friction force field of the middle and rear upper rubber rollers and an additional friction force field of the rear lower roller act, so that the drafting effect is improved, and the yarn forming quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spinning, in particular to a spinning method for multiple composite yarns. Background Art

[0002] As the times continue to advance, people's requirements for clothing fabrics are constantly increasing. At present, the textile and clothing industry is 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 them, fancy yarns have gradually entered people's field of vision and occupied an irreplaceable position. Fancy yarn refers to yarns with special structures and appearance effects obtained by processing fibers or yarns with special raw materials, special equipment or special processes in the process of spinning and thread making. It is a kind of yarn with decorative effect in yarn products. Fancy yarn has unique structure, flexible shape, rich color expression, diversified use of raw materials, and creativity. These make it easy for fancy yarn products to be innovative and produce more differentiated textile products. In today's era of pursuing personalized consumption, the market has given fancy yarns a broad space. Among them, segmented color yarn is a kind of fancy yarn that is currently widely studied and applied. It has a new style of multi-color combination. It not only has thickness changes in the yarn axis, but also has discontinuous distribution and alternating fancy colors, presenting irregular and unique color effects. At present, the production of segment color yarn is mainly achieved by modifying the traditional spinning frame with three rollers. The white roving is continuously fed by the middle roller, and a colored auxiliary yarn is intermittently fed by the rear roller. The two rovings merge at the outlet of the front roller to produce a segment color effect. This method has low modification cost and high efficiency, but the yarn evenness is poor. In response to this, the Chinese patent "Segment Color Spinning Transmission Device (Patent No.: ZL200420081737.2)" provides a segment color yarn production device with four rollers, but the device still uses double roving feeding. At the same time, the first roller and the second roller are still controlled by the same motor, so the main draft cannot be freely adjusted. Summary of the invention

[0003] The purpose of the present invention is to provide a multiple composite yarn spinning method to solve the problems in the prior art, realize the independent dual-zone drafting process of dividing the three fed coarse yarns into two groups, and then realize the production of composite yarns with multiple structures with different effects, enrich the variety of yarns, and improve the added value of yarns. In addition, during the drafting process, the additional friction field is applied by the middle and rear upper rubber rollers and the rear lower rollers to improve the drafting effect and improve the yarn quality.

[0004] The invention provides a multiple composite yarn spinning method, which adopts a multiple composite yarn spinning device, including a rear roller drafting pair consisting of a rear lower roller and a rear upper rubber roller, a middle rear roller drafting pair consisting of a middle rear lower roller and a middle rear upper rubber roller, a middle front roller drafting pair consisting of a middle front lower roller and a middle front upper rubber roller, and a front roller drafting pair consisting of a front lower roller and a front upper rubber roller, including single roving feeding spinning, double roving feeding spinning, and triple roving feeding spinning;

[0005] When a single roving is fed into the spinning machine, the single roving is subjected to the lower friction force produced by the stationary rear lower roller to hinder the movement, which produces a lower friction force field on the fibers in the roving, so that part of the fibers in the roving are further straightened backwards;

[0006] In the double roving feeding spinning, the two rovings fed at a certain distance are subjected to the upper resistance friction force of the middle and rear rubber rollers which are rotating from static to passive, and the upper resistance friction force field is generated on the fibers in the roving, so that part of the fibers in the roving are further straightened backwards;

[0007] When three rovings are fed into the spinning machine, when the rotational linear speed of the middle rear lower roller is greater than that of the rear lower roller, the two rovings on both sides are subjected to the upper promoting friction force of the rotating middle rear upper rubber roller, which generates an upper promoting friction force field for the fibers in the roving, so that the fibers in the roving change from the slow motion consistent with the rotation speed of the rear lower roller to the preparatory fast motion consistent with the middle rear upper rubber roller, thereby realizing two speed changes of the roving in the rear drafting zone where the roving is located, and the middle roving is subjected to the lower relative hindering friction force of the rotating rear lower roller, which generates a lower relative hindering friction force field for the fibers in the roving, so that part of the fibers in the roving are further straightened backward, thereby realizing uniform and concentrated speed change of the roving in the rear drafting zone where the roving is located;

[0008] When the rotational linear speed of the middle rear lower roller is lower than that of the rear lower roller, the two rovings on both sides are subjected to the upper relative hindering friction force of the rotating middle rear upper rubber roller, which produces an upper relative hindering friction force field for the fibers in the roving, so that the fibers in the roving are further straightened backward, thereby achieving uniform and concentrated speed change of the roving in the rear stretching zone where the roving is located; the middle roving is subjected to the lower relative promoting friction force of the rotating rear lower roller, which produces a lower relative promoting friction force field for the fibers in the roving, so that part of the fibers in the roving are further straightened forward, thereby achieving uniform and concentrated speed change of the roving in the rear stretching zone where the roving is located.

[0009] A multiple composite yarn spinning method as described above, wherein preferably, the rear upper rubber roller, the middle rear upper rubber roller, the middle front upper rubber roller, and the front upper rubber roller include a rubber roller shaft, and a left rear rubber roller sleeve and a right rear rubber roller sleeve are sleeved on the rubber roller shaft of the rear upper rubber roller at a certain distance through a bearing, and a length equal to the length of the left rear rubber roller sleeve, the length of the right rear rubber roller sleeve, and the spacing between the left rear rubber roller sleeve and the right rear rubber roller sleeve is respectively sleeved on the rubber roller shaft of the middle rear upper rubber roller, the middle front upper rubber roller, and the front upper rubber roller. The sum of the middle-rear rubber roller cover, the middle-front rubber roller cover, and the front rubber roller cover, the rear bottom roller, the middle-rear bottom roller, the middle-front bottom roller, and the front bottom roller include roller shafts, and the covers fixed on the roller shafts of the rear bottom roller, the middle-front bottom roller, and the front bottom roller respectively have the rear roller cover, the middle-front roller cover, and the front roller cover respectively, and the cover fixed on the middle-rear bottom roller has the middle-rear roller cover whose length is equal to the distance between the left rear rubber roller cover and the right rear rubber roller cover.

[0010] A multiple composite yarn spinning method as described above, wherein preferably, after the pressure assembly is pressed, the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover are tightly pressed, the rubber roller shaft between the left rear rubber roller cover and the right rear rubber roller cover and the rear roller cover remain suspended, the middle rear rubber roller cover and the middle rear roller cover are tightly pressed, the middle rear roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and the middle rear roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover are all kept suspended, the middle front rubber roller cover and the middle front roller cover are tightly pressed, and the front rubber roller cover and the front roller cover are tightly pressed.

[0011] A multiple composite yarn spinning method as described above, wherein preferably, a single roving is fed into the spinning, and a separate third roving is used to slide through the suspended space between the rubber roller shaft between the left rear rubber roller cover and the right rear rubber roller cover and the rear roller cover, and then is pressed and fed between the middle rear roller cover and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and is stretched by the second rear stretching zone composed of the middle rear roller stretching pair and the middle front roller stretching pair, and finally is pressed and output between the front roller cover and the front rubber roller cover, and is stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, to obtain the third roving.

[0012] A multiple composite yarn spinning method as described above, wherein preferably, double rovings are fed into the spinning process, and the first roving and the second roving are pressed and fed between the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover, respectively, and then slide through in midair between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover, respectively, and then are pressed and passed between the middle front roller cover and the middle front rubber roller cover, and are stretched by the first rear stretching zone composed of the rear roller stretching pair and the middle front roller stretching pair, and finally are pressed and output between the front roller cover and the front rubber roller cover, and are stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, to obtain the first whisker and the second whisker, respectively.

[0013] A multiple composite yarn spinning method as described above, wherein preferably, three rovings are fed into the spinning process, and the first roving and the second roving are pressed and fed between the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover respectively, and then slide through in midair between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover respectively, and then are pressed and passed between the middle front roller cover and the middle front rubber roller cover, and are subjected to the drafting effect of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally are pressed and output between the front roller cover and the front rubber roller cover, and are subjected to the drafting effect of the middle The first whisker and the second whisker are obtained by the drafting action of the front roller drafting pair and the front drafting zone composed of the front roller drafting pair respectively; at the same time, the third coarse yarn is slipped through the rubber roller shaft between the left rear rubber roller cover and the right rear rubber roller cover and the rear roller cover in the air, and then is pressed and fed between the middle rear roller cover and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and 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, and finally is pressed and output between the front roller cover and the front rubber roller cover, 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, so as to obtain the third whisker.

[0014] In the above-mentioned method for spinning multiple composite yarns, preferably, the first roving, the second roving and the third roving are the same or different rovings.

[0015] A multiple composite yarn spinning method as described above, wherein preferably, double rovings are fed into the spinning process, and the first sliver and the second sliver outputted at the same time are first twisted into the first sub-yarn and the second sub-yarn respectively under the action of the transmitted twist, and then the first sub-yarn and the second sub-yarn are symmetrically intertwined and twisted with each other, or asymmetrically intertwined and twisted with each other to form a spun yarn with a certain strength.

[0016] A multiple composite yarn spinning method as described above, wherein preferably, three coarse yarns are fed into the spinning process, and the first, second and third slivers output simultaneously are first twisted into the first, second and third sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically intertwined and twisted with each other about the third sub-yarn in the middle, or the third sub-yarn in the middle is asymmetrically intertwined and twisted with each other to form a twisted spun yarn with a certain strength.

[0017] In the above-mentioned multiple composite yarn spinning method, preferably, the length of the left rear rubber roller cover, the length of the right rear rubber roller cover, and the spacing between the left rear rubber roller cover and the right rear rubber roller cover are the same.

[0018] Compared with the prior art, the present invention adopts four-row rollers with separate transmission, and the rear upper rubber roller adopts a rubber roller with rubber roller covers installed on the left and right, and the middle and rear lower roller adopts a roller with a roller cover installed in the middle, so that the three coarse yarns fed are divided into two groups to complete their own independent double-zone drafting processes, thereby realizing the production of fancy yarns with different effects, enriching the variety of yarns, and improving the added value of yarns. In the drafting process, the yarns are respectively affected by the additional friction field of the middle and rear upper rubber rollers and the additional friction field of the rear lower rollers, thereby improving the drafting effect and improving the yarn quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the multiple composite yarn spinning device of the present invention.

[0020] Explanation of the reference numerals: 1 - first roving, 2 - second roving, 3 - third roving, 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 - wire ring, 19 - steel collar, 20 - yarn tube, 21 - rubber roller shaft, 22 - right rear rubber roller cover, 23 - left rear rubber roller cover, 24 - roller shaft, 25 - middle rear roller cover. DETAILED DESCRIPTION

[0021] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0022] The present invention provides a multiple composite yarn spinning method, which realizes an independent dual-zone drafting process in which three fed coarse yarns are divided into two groups, and then realizes the production of composite yarns with multiple structures with different effects, enriches the variety of yarns, and improves the added value of yarns. In addition, during the drafting process, an additional friction field is applied by the middle and rear upper rubber rollers 7 and the rear lower rollers 4 to improve the drafting effect and the yarn quality.

[0023] In order to achieve the above-mentioned object, the present invention 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 rear roller drafting pair consisting of a rear lower roller 4 and a rear upper rubber roller 5, a middle rear roller drafting pair consisting of a middle rear lower roller 6 and a middle rear upper rubber roller 7, a middle front roller drafting pair consisting of a middle front lower roller 8 and a middle front upper rubber roller 9, and a front roller drafting pair consisting of a front lower roller 10 and a front upper rubber roller 11. The rear upper rubber roller 5, the middle rear upper rubber roller 7, the middle front upper rubber roller 9, and the front upper rubber roller 11 include a rubber roller shaft 21. A left rear rubber roller cover 23 and a right rear rubber roller cover 22 are sleeved on the rubber roller shaft 21 of the rear upper rubber roller 5. The left rear rubber roller cover 23 and the right rear rubber roller cover 22 have the same structure. The left rear rubber roller cover 23 and the right rear rubber roller cover 22 are made of rubber and are respectively connected to the rubber roller shaft 21 of the rear upper rubber roller 5 through bearings, so that The left rear rubber roller cover 23 and the right rear rubber roller cover 22 can rotate freely around the rubber roller shaft 21 of the rear upper rubber roller 5. A certain distance is maintained between the left rear rubber roller cover 23 and the right rear rubber roller cover 22, and the length of the left rear rubber roller cover 23, the length of the right rear rubber roller cover 22, and the distance between the left rear rubber roller cover 23 and the right rear rubber roller cover 22 are the same. A middle rear rubber roller cover is sleeved on the rubber roller shaft 21 of the middle rear upper rubber roller 7. The middle rear rubber roller cover is connected to the rubber roller shaft 21 of the middle rear upper rubber roller 7 through a bearing, so that the middle rear rubber roller cover can rotate freely around the rubber roller shaft 21 of the middle rear upper rubber roller 7. The length of the middle rear rubber roller cover is equal to the sum of the length of the left rear rubber roller cover 23, the length of the right rear rubber roller cover 22, and the distance between the left rear rubber roller cover 23 and the right rear rubber roller cover 22. 1 is covered with a middle front rubber roller cover, and the middle front rubber roller cover is connected to the rubber roller shaft 21 of the middle front upper rubber roller 9 through a bearing, so that the middle front rubber roller cover can rotate freely around the rubber roller shaft 21 of the middle front upper rubber roller 9, and the length of the middle front rubber roller cover is equal to the length of the middle rear rubber roller cover, and the front rubber roller cover is covered on the rubber roller shaft 21 of the front upper rubber roller 11, and the front rubber roller cover is connected to the rubber roller shaft 21 of the front upper rubber roller 11 through a bearing, so that the front rubber roller cover can rotate freely around the rubber roller shaft 21 of the front upper rubber roller 11, and the length of the front rubber roller cover is equal to the length of the middle front rubber roller cover, the rear lower roller 4, the middle rear lower roller 6, the middle front lower roller 8, and the front lower roller 10 include a roller shaft 24, and the rear roller cover is covered on the roller shaft 24 of the rear lower roller 4, and the rear roller cover and the roller shaft 2 of the rear lower roller 4 4 are made of the same material and are integrally fixedly connected therebetween. The length of the rear roller sleeve is equal to the sum of the length of the left rear rubber roller sleeve 23, the length of the right rear rubber roller sleeve 22, and the distance between the left rear rubber roller sleeve 23 and the right rear rubber roller sleeve 22. A middle rear roller sleeve 25 is sleeved on the middle part of the roller shaft 24 of the middle rear lower roller 6. The middle rear roller sleeve 25 is made of the same material as the roller shaft 24 of the middle rear lower roller 6 and are integrally fixedly connected therebetween. The length of the middle rear roller sleeve 25 is equal to the distance between the left rear rubber roller sleeve 23 and the right rear rubber 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 is made of the same material as the roller shaft 24 of the middle front lower roller 8 and are integrally fixedly connected therebetween. The length of the middle front roller sleeve is equal to the length of the rear roller sleeve.A front roller sleeve is sleeved on the roller shaft 24 of the front lower roller 10. The front roller sleeve is made of the same material as the roller shaft 24 of the front lower roller 10 and the two are integrally fixedly connected. 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, and 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 a programmable logic controller 16.

[0024] During spinning, the pressure assembly is pressed, so that the left rear rubber roller cover 23, the right rear rubber roller cover 22 and the rear roller cover are tightly pressed, the rubber roller shaft 21 between the left rear rubber roller cover 23 and the right rear rubber roller cover 22 and the rear roller cover are kept suspended, the middle rear rubber roller cover and the middle rear roller cover 25 are tightly pressed, and the middle rear roller cover 25 and the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller cover 25, and the middle rear roller cover 25 and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller cover 25 are kept suspended. The first roving 1 and the second roving 2 are pressed and fed between the left rear rubber roller cover 23 and the right rear rubber roller cover 22 and the rear roller cover respectively, and then slide through the middle rear rubber roller cover and the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller cover 25, and between the middle rear rubber roller cover and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller cover 25 respectively, and then pass through the middle front roller cover and The first roving 3 is pressed and passed between the middle and front rubber roller sleeves, and is subjected to the drafting effect of the first rear drafting zone composed of the rear roller drafting pair and the middle and front roller drafting pair, and is finally pressed and output between the front roller sleeve and the front rubber roller sleeve, and is subjected to the drafting effect of the front drafting zone composed of the middle and front roller drafting pair and the front roller drafting pair, so as to obtain the first whisker and the second whisker respectively; the third roving 3 passes through the rubber roller shaft 21 between the left rear rubber roller sleeve 23 and the right rear rubber roller sleeve 22 and is suspended between the rear roller sleeve, and then is output by the middle rear roller sleeve 25 and the middle rear It is pressed and fed between the rubber roller sleeves, and then pressed and passed between the middle front roller sleeve and the middle front rubber roller sleeve, and is stretched by the second rear stretching zone composed of the middle rear roller stretching pair and the middle front roller stretching pair, and finally is pressed and output between the front roller sleeve and the front rubber roller sleeve, and is stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, to obtain the third roving, 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 present invention 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, a separate third roving 3 is used to slide through the rubber roller shaft 21 between the left rear rubber roller cover 23 and the right rear rubber roller cover 22 and the rear roller cover in the air, and then is pressed and fed between the middle rear roller cover 25 and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and is stretched by the second rear stretching zone composed of the middle rear roller stretching pair and the middle front roller stretching pair, and finally is pressed and output between the front roller cover and the front rubber roller cover, and is stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, so as to obtain the third sliver.

[0027] During the spinning process, the first roving 1 and the second roving 2 are fed into the left rear rubber roller cover 23, the right rear rubber roller cover 22 and the rear roller cover respectively, and then slide through the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller cover 25 and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller cover 25 respectively, and then are pressed through between the middle front roller cover and the middle front rubber roller cover, and are stretched by the first rear stretching zone composed of the rear roller stretching pair and the middle front roller stretching pair, and finally are pressed and output between the front roller cover and the front rubber roller cover, and are stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, to obtain the first whisker and the second whisker respectively.

[0028] In the three-roving feeding spinning, the first roving 1 and the second roving 2 are pressed and fed between the left rear rubber roller cover 23, the right rear rubber roller cover 22 and the rear roller cover respectively, and then slide through in the air between the middle rear rubber roller cover and the roller shaft 24 of the middle rear lower roller 6 on the left side of the middle rear roller cover 25, and between the middle rear rubber roller cover and the roller shaft 24 of the middle rear lower roller 6 on the right side of the middle rear roller cover 25, and then press through between the middle front roller cover and the middle front rubber roller cover, and are subjected to the drafting effect of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally are pressed and output between the front roller cover and the front rubber roller cover, and are subjected to the drafting effect of the middle front roller drafting pair and the front roller The first and second whiskers are obtained by the stretching effect of the front stretching zone composed of the pulling stretching pair; at the same time, the third coarse yarn 3 is slipped through the rubber roller shaft 21 between the left rear rubber roller cover 23 and the right rear rubber roller cover 22 and the rear roller cover in a suspended manner, and then is pressed and fed between the middle rear roller cover 25 and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and is subjected to the stretching effect of the second rear stretching zone composed of the middle rear roller stretching pair and the middle front roller stretching pair, and finally is pressed and output between the front roller cover and the front rubber roller cover, and is subjected to the stretching effect of the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, so as to obtain the third whisker.

[0029] During spinning, the main motor drives the spindle to rotate through the spindle belt, and then drives the bobbin 20 to rotate, and the twist generated is transmitted from bottom to top, so that the third whisker obtained after drawing, or the first whisker and the second whisker, or the first whisker, the second whisker and the third whisker rotate around their own axis, and the third whisker output separately is directly produced into a single-spinning yarn with a certain strength under the action of the twisting twist; or the first whisker and the second whisker output at the same time are first twisted into the first sub-yarn and the second sub-yarn respectively under the action of the transmitted twist, and then the first sub-yarn and the second sub-yarn are symmetrically intertwined and plyed with each other, or asymmetrically intertwined and plyed with each other to form a yarn with a certain strength. The first, second and third whiskers output at the same time are first twisted into the first, second and third sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically intertwined and twisted with each other about the third sub-yarn in the middle, or the third sub-yarn in the middle is asymmetrically intertwined and twisted with each other to form a twisted spun yarn with a certain strength; the obtained spun yarn is wound on the bobbin 20 after passing through the yarn guide hook 17 and the wire ring 18, and the rotation of the bobbin 20 drives the wire ring 18 to rotate around the steel collar 19. Since the rotation linear speed of the wire ring 18 is less than the rotation linear speed of the bobbin 20, the spun yarn is continuously wound on the bobbin 20.

[0030] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A multiple composite yarn spinning method, using a multiple composite yarn spinning device, including a rear roller drafting pair consisting of a rear bottom roller and a rear upper rubber roller, a middle rear roller drafting pair consisting of a middle rear bottom roller and a middle rear upper rubber roller, a middle front roller drafting pair consisting of a middle front bottom roller and a middle front upper rubber roller, and a front roller drafting pair consisting of a front bottom roller and a front upper rubber roller, including single roving feeding spinning, double roving feeding spinning, and triple roving feeding spinning, characterized in that: When a single roving is fed into the spinning machine, the single roving is subjected to the lower friction force produced by the stationary rear lower roller to hinder the movement, which produces a lower friction force field on the fibers in the roving, so that part of the fibers in the roving are further straightened backwards; In the double roving feeding spinning, the two rovings fed at a certain distance are subjected to the upper resistance friction force of the middle and rear rubber rollers which are rotating from static to passive, and the upper resistance friction force field is generated on the fibers in the roving, so that part of the fibers in the roving are further straightened backwards; When three rovings are fed into the spinning machine, when the rotational linear speed of the middle rear lower roller is greater than that of the rear lower roller, the two rovings on both sides are subjected to the upper promoting friction force of the rotating middle rear upper rubber roller, which generates an upper promoting friction force field for the fibers in the roving, so that the fibers in the roving change from the slow motion consistent with the rotation speed of the rear lower roller to the preparatory fast motion consistent with the middle rear upper rubber roller, thereby realizing two speed changes of the roving in the rear drafting zone where the roving is located, and the middle roving is subjected to the lower relative hindering friction force of the rotating rear lower roller, which generates a lower relative hindering friction force field for the fibers in the roving, so that part of the fibers in the roving are further straightened backward, thereby realizing uniform and concentrated speed change of the roving in the rear drafting zone where the roving is located; When the rotational linear speed of the middle rear lower roller is lower than that of the rear lower roller, the two rovings on both sides are subjected to the upper relative hindering friction force of the rotating middle rear upper rubber roller, which produces an upper relative hindering friction force field for the fibers in the roving, so that the fibers in the roving are further straightened backward, thereby achieving uniform and concentrated speed change of the roving in the rear stretching zone where the roving is located; the middle roving is subjected to the lower relative promoting friction force of the rotating rear lower roller, which produces a lower relative promoting friction force field for the fibers in the roving, so that part of the fibers in the roving are further straightened forward, thereby achieving uniform and concentrated speed change of the roving in the rear stretching zone where the roving is located.

2. A method for spinning multiple composite yarns according to claim 1, characterized in that: The rear upper rubber roller, the middle rear upper rubber roller, the middle front upper rubber roller and the front upper rubber roller include a rubber roller shaft, on the rubber roller shaft of the rear upper rubber roller, there are sleeves with a left rear rubber roller sleeve and a right rear rubber roller sleeve which are kept at a certain distance through bearings, and on the rubber roller shafts of the middle rear upper rubber roller, the middle front upper rubber roller and the front upper rubber roller, there are sleeves with a middle rear rubber roller sleeve and a middle front rubber roller sleeve respectively which have a length equal to the sum of the length of the left rear rubber roller sleeve, the length of the right rear rubber roller sleeve and the distance between the left rear rubber roller sleeve and the right rear rubber roller sleeve through bearings. The sleeves are respectively fixed on the roller shafts of the rear bottom roller, the middle front bottom roller and the front bottom roller, and have the rear roller sleeve, the middle front roller sleeve and the front roller sleeve, and the sleeve fixed on the middle rear bottom roller has the middle rear roller sleeve whose length is the same as the distance between the left rear rubber roller sleeve and the right rear rubber roller sleeve.

3. A method for spinning multiple composite yarns according to claim 2, characterized in that: After the pressure assembly is pressed, the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover are tightly pressed, the rubber roller shaft between the left rear rubber roller cover and the right rear rubber roller cover and the rear roller cover remain suspended, the middle rear rubber roller cover and the middle rear roller cover are tightly pressed, the middle rear roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and the middle rear roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover are all kept suspended, the middle front rubber roller cover and the middle front roller cover are tightly pressed, and the front rubber roller cover and the front roller cover are tightly pressed.

4. A method for spinning multiple composite yarns according to claim 2, characterized in that: In the single roving feeding spinning, a separate third roving is used to slide through the suspended space between the rubber roller shaft between the left rear rubber roller cover and the right rear rubber roller cover and the rear roller cover, and then is pressed and fed between the middle rear roller cover and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and is stretched by the second rear stretching zone composed of the middle rear roller stretching pair and the middle front roller stretching pair, and finally is pressed and output between the front roller cover and the front rubber roller cover, and is stretched by the front stretching zone composed of the middle front roller stretching pair and the front roller stretching pair, so as to obtain the third sliver.

5. A method for spinning multiple composite yarns according to claim 2, characterized in that: In the spinning process, the double roving is fed, and the first roving and the second roving are pressed and fed between the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover respectively, and then slide through in midair between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover respectively, and then pressed and passed between the middle front roller cover and the middle front rubber roller cover, and subjected to the drafting effect of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally pressed and outputted between the front roller cover and the front rubber roller cover, and subjected to the drafting effect of the front drafting zone composed of the middle front roller drafting pair and the front roller drafting pair, to obtain the first whisker and the second whisker respectively.

6. A method for spinning multiple composite yarns according to claim 2, characterized in that: In the three-roving feeding spinning, the first roving and the second roving are pressed and fed between the left rear rubber roller cover, the right rear rubber roller cover and the rear roller cover respectively, and then slide through in the air between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the left side of the middle rear roller cover, and between the middle rear rubber roller cover and the roller shaft of the middle rear lower roller on the right side of the middle rear roller cover respectively, and then pressed and passed between the middle front roller cover and the middle front rubber roller cover, and subjected to the drafting effect of the first rear drafting zone composed of the rear roller drafting pair and the middle front roller drafting pair, and finally pressed and outputted between the front roller cover and the front rubber roller cover, and subjected to the drafting effect of the middle front roller drafting pair and the front roller drafting pair. The first and second whiskers are obtained by the drafting action of the front drafting zone composed of the left rear rubber roller cover and the right rear rubber roller cover, respectively; at the same time, the third coarse yarn is slipped through the suspended slide between the rubber roller shaft and the rear roller cover between the left rear rubber roller cover and the right rear rubber roller cover, and then is pressed and fed between the middle rear roller cover and the middle rear rubber roller cover, and then is pressed and passed between the middle front roller cover and the middle front rubber roller cover, and 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, and finally is pressed and output between the front roller cover and the front rubber roller cover, 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, so as to obtain the third whisker.

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

8. A method for spinning multiple composite yarns according to claim 5, characterized in that: The double roving is fed into the spinning process, and the first and second slivers output at the same time are twisted into the first and second sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically intertwined and twisted with each other, or asymmetrically intertwined and twisted with each other to form a spun yarn with a certain strength.

9. A method for spinning multiple composite yarns according to claim 6, characterized in that: Three coarse yarns are fed into the spinning process, and the first, second and third yarns output at the same time are twisted into the first, second and third sub-yarns respectively under the action of the transmitted twist, and then the first and second sub-yarns are symmetrically intertwined and twisted with each other about the third sub-yarn in the middle, or the third sub-yarn in the middle is asymmetrically intertwined and twisted with each other to form a twisted spun yarn with a certain strength.

10. A method for spinning multiple composite yarns according to claim 2, characterized in that: The length of the left rear rubber roller cover, the length of the right rear rubber roller cover, and the spacing between the left rear rubber roller cover and the right rear rubber roller cover are the same.

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