Production method of wrapped blended yarn

Abstract

The invention discloses a spinning method for wrapping blended yarns, which comprises the following steps of: adopting a front row of drafting roller pairs, a middle row of drafting roller pairs and a rear row of drafting roller pairs which are independently driven, sleeving left and right rotating shaft sleeve groups which are axially symmetrically arranged on a roller shaft of a lower roller, and sleeving left and right rubber roller sleeve groups which are axially symmetrically arranged on a rubber roller shaft of an upper rubber roller; three pairs of pressing, holding and feeding jaws for short fiber roving are respectively formed on the roller shaft and the first rotating shaft sleeve and the second rotating shaft sleeve in the left and right rotating shaft sleeve groups in a bilateral symmetry manner; a first pair of short fiber strands which are pressed, drafted and output on a roller shaft, a second pair of short fiber strands which are pressed, drafted and output on a second rotating shaft sleeve and a third pair of short fiber strands which are pressed, drafted and output on a first rotating shaft sleeve are output in a lower, middle and upper space overlapping state, and production of needed wrapped blended yarn is achieved. Then direct blending in the spinning process is achieved, different fiber components in blended yarn are arranged in a layered mode, the blending efficiency is improved, and different blending purposes are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of novel spinning, in particular to a production method of wrapped blended yarn. Background Art

[0002] As the times continue to advance, people's requirements for clothing fabrics continue to increase. 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 during the spinning and thread making process. 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. Drafting is the most important link in the production of fine yarn. During drafting, the fibers are gradually drawn out from the surrounding fiber groups one by one. Due to mutual friction, the hooks are gradually eliminated and the curling is gradually straightened. In this way, the lateral connection remaining in each fiber may be completely eliminated, creating conditions for firmly establishing a regular head-to-tail connection relationship. Therefore, effective control of fibers during the drafting process is an important condition for achieving excellent drafting effects. Summary of the invention

[0003] The purpose of the present invention is to provide a method for producing a wrapped blended yarn to solve the problems in the prior art.

[0004] The present invention provides a method for producing a wrapped blended yarn, and uses a production device for the wrapped blended yarn. The production device for the wrapped blended yarn includes a drafting system, and the drafting system includes three independently driven front, middle and rear drafting roller pairs. The roller shafts of the lower rollers of each drafting roller pair are sleeved with left and right rotating shaft sleeve groups arranged in an axisymmetric manner. The left and right rotating shaft groups include a first rotating shaft sleeve and a second rotating shaft sleeve that are concentrically nested, and one end of the second rotating shaft sleeve extends out of the first rotating shaft sleeve. The rubber roller shafts of the upper rubber rollers of each drafting roller pair are sleeved with left and right rubber roller sleeve groups arranged in an axisymmetric manner. The left and right rubber roller sets include a first rubber roller set, a second rubber roller set, and a third rubber roller set of different diameters. Corresponding pressing, holding, and feeding jaws for three short-fiber rovings on the left are formed on the roller shaft and the first rotating shaft sleeve and the second rotating shaft sleeve in the left rotating shaft sleeve set. Corresponding pressing, holding, and feeding jaws for three short-fiber rovings on the right are formed on the roller shaft and the first rotating shaft sleeve and the second rotating shaft sleeve in the right rotating shaft sleeve set. The three pairs of pressing, holding, and feeding jaws for the short-fiber rovings on the left are symmetrically arranged with the three pairs of pressing, holding, and feeding jaws for the short-fiber rovings on the right. The yarn pair is stretched through the press-holding feeding jaws of the short fiber roving on the left side and the press-holding feeding jaws of the short fiber roving on the right side formed on the roller shaft, and the first pair of short fiber whiskers are output after being stretched. The second pair of short fiber rovings is stretched through the press-holding feeding jaws of the short fiber roving on the left side and the press-holding feeding jaws of the short fiber roving on the right side formed on the second rotating sleeve, and the second pair of short fiber whiskers are output after being stretched. The third pair of short fiber rovings is stretched through the press-holding feeding jaws of the short fiber roving on the left side and the press-holding feeding jaws of the short fiber roving on the right side formed on the first rotating sleeve, and the third pair of short fiber whiskers are output after being stretched, and the first pair The staple fiber whiskers, the second pair of staple fiber whiskers, and the third pair of staple fiber whiskers are output to the drafting system in a spatially overlapping state at the bottom, middle, and top. Under the action of twisting twist, the first pair of staple fiber whiskers are twisted with each other to form an inner yarn, the second pair of staple fiber whiskers are twisted with each other and simultaneously spatially wrap the first pair of staple fiber whiskers to form a middle yarn, and the third pair of staple fiber whiskers are twisted with each other and simultaneously spatially wrap the first pair of staple fiber whiskers and the second pair of staple fiber whiskers to form an outer yarn, thereby obtaining a directly blended yarn in the spinning process and a wrapped blended yarn in which different fiber components in the blended yarn are arranged in layers.

[0005] A production method for wrapped blended yarn as described above, wherein preferably, the first rotating sleeve and the second rotating sleeve are both cylindrical hollow structures with open left and right ends, the materials of the first rotating sleeve and the second rotating sleeve are exactly the same as the material of the roller shaft, the second rotating sleeve is directly sleeved on the roller shaft, the second rotating sleeve and the roller shaft are integrated and fixedly connected, and a certain distance is maintained between the right end of the second rotating sleeve of the left rotating sleeve group and the left end of the second rotating sleeve of the right rotating sleeve group, a certain distance is maintained between the left end of the second rotating sleeve of the left rotating sleeve group and the left end of the roller shaft of the spindle position where it is located, and a certain distance is maintained between the right end of the second rotating sleeve of the right rotating sleeve group and the right end of the roller shaft of the spindle position where it is located, the first rotating sleeve is nested on the second rotating sleeve, the left end of the first rotating sleeve of the left rotating sleeve group is aligned with the left end of the roller shaft of the spindle position where it is located, and the left end of the first rotating sleeve of the left rotating sleeve group is located The first rotating shaft sleeve between the left end of the second rotating shaft sleeve and the roller shaft are integrally fixedly connected, and a certain gap is maintained between the first rotating shaft sleeve and the second rotating shaft sleeve of the left rotating shaft sleeve group, and the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group is located on the left side of the right end of the first rotating shaft sleeve and a certain distance is maintained between the two, the right end of the first rotating shaft sleeve of the right rotating shaft sleeve group is aligned with the right end of the roller shaft of the spindle position, and the first rotating shaft sleeve of the right rotating shaft sleeve group between the right end of the first rotating shaft sleeve and the right end of the second rotating shaft sleeve is integrally fixedly connected with the roller shaft, and a certain gap is maintained between the first rotating shaft sleeve and the second rotating shaft sleeve of the right rotating shaft sleeve group between the left end of the second rotating shaft sleeve and the left end of the first rotating shaft sleeve, and the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group is located on the right side of the left end of the first rotating shaft sleeve and a certain distance is maintained between the two.

[0006] A method for producing a wrapped blended yarn as described above, wherein preferably, the first rubber roller cover, the second rubber roller cover, and the middle rubber roller cover are respectively connected to the rubber roller shaft through bearings, so that the first rubber roller cover, the second rubber roller cover, and the middle rubber roller cover can rotate freely around the rubber roller shaft independently, the diameter of the first rubber roller cover is smaller than the diameter of the second rubber roller cover, the diameter of the second rubber roller cover is smaller than the diameter of the middle rubber roller cover, the left end of the first rubber roller cover of the left rubber roller cover group is vertically aligned with the left end of the rubber roller shaft, and is vertically aligned with the left end of the first rotating shaft sleeve of the left rotating shaft sleeve group, the right end of the first rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the first rotating shaft sleeve of the left rotating shaft sleeve group, and the left end of the second rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the first rotating shaft sleeve of the left rotating shaft sleeve group, The right end of the second rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group, the right end of the first rubber roller cover of the right rubber roller cover group is vertically aligned with the right end of the rubber roller shaft, and is vertically aligned with the right end of the first rotating shaft sleeve of the right rotating shaft sleeve group, the left end of the first rubber roller cover of the right rubber roller cover group is vertically aligned with the left end of the first rotating shaft sleeve of the right rotating shaft sleeve group, the right end of the second rubber roller cover of the right rubber roller cover group is vertically aligned with the left end of the first rotating shaft sleeve of the right rotating shaft sleeve group, the left end of the second rubber roller cover of the right rubber roller cover group is vertically aligned with the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group, the left end of the middle rubber roller cover is vertically aligned with the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group, and the right end of the middle rubber roller cover is vertically aligned with the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group.

[0007] The method for producing a wrapped blended yarn as described above preferably includes the production of pure spun single yarn, pure spun twin yarn, and wrapped blended twin yarn.

[0008] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of pure single yarn, a short fiber roving unwound from a roving tube is first grasped by the rear middle pressing and holding continuous conveying jaws to enter the drafting system, and then grasped and outputted by the middle pressing and holding continuous conveying jaws, during which time it is subjected to the drafting action of the lower rear drafting zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws to obtain a short fiber bundle with reduced linear density, and the short fiber bundle is then grasped and outputted from the drafting system by the front middle pressing and holding continuous conveying jaws, during which time it is subjected to the drafting action of the lower front drafting zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain a short fiber strand with reduced linear density, thereby completing the drafting action of the fed short fiber roving in the drafting system.

[0009] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of pure spun siro yarn, a first short fiber roving pair including a first left short fiber roving and a first right short fiber roving respectively unwound from two roving tubes are respectively gripped by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system, or a second short fiber roving pair including a second left short fiber roving and a second right short fiber roving respectively unwound from two roving tubes are respectively gripped by the rear two pressing and holding continuous conveying jaws and the rear three pressing and holding continuous conveying jaws to enter the drafting system, at which time the first left short fiber roving located at the rear side of the rear middle pressing and holding continuous conveying jaw and the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller located on the right side are aligned with the first left The short-fiber roving is kept in contact at the rear arc point of the horizontal diameter, the first left short-fiber roving located in front of the rear center pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller on the right side at the front arc point of the diameter kept horizontal with the first left short-fiber roving, the first right short-fiber roving located in the rear center pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the rear arc point of the diameter kept horizontal with the first right short-fiber roving, the first right short-fiber roving located in front of the rear center pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the rear arc point of the diameter kept horizontal with the first right short-fiber roving The second left staple fiber roving located at the rear side of the rear two pressing and holding continuous conveying jaws contacts at the front arc point of the diameter maintained horizontally with the second left staple fiber roving, or the second left staple fiber roving located at the rear side of the rear two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear bottom roller on the right side at the rear arc point of the diameter maintained horizontally with the second left staple fiber roving, the second left staple fiber roving located at the front side of the rear two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear bottom roller on the right side at the front arc point of the diameter maintained horizontally with the second left staple fiber roving, the second right staple fiber roving located at the rear side of the rear two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear bottom roller on the left side at the rear arc point of the diameter maintained horizontally with the second right staple fiber roving. The first and second right staple fiber rovings are in contact with each other at a point, the second right staple fiber roving located in front of the rear two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller located on the left side at the front arc point of the diameter kept horizontal with the second right staple fiber roving. During the contact process, the rear arc point has an upward driving effect on the short fibers in the first left staple fiber roving, the first right staple fiber roving or the second left staple fiber roving, and the second right staple fiber roving under the friction force, thereby realizing the uniform distribution and finishing of the short fibers in the staple fiber roving in the cross section, and then realizing the upper finishing of the staple fiber roving. The front arc point has a downward driving effect on the short fibers in the first left staple fiber roving, the first right staple fiber roving or the second left staple fiber roving, and the second right staple fiber roving under the friction force.Thereby achieving uniform distribution of the short fibers in the short fiber roving in the cross section, and then achieving the bottom finishing of the short fiber roving;

[0010] Then, the first left staple fiber roving and the first right staple fiber roving are gripped and outputted through the left and right sides of the middle press-holding continuous conveying jaws respectively, or the second left staple fiber roving and the second right staple fiber roving are gripped and outputted through the middle second press-holding continuous conveying jaws and the middle third press-holding continuous conveying jaws respectively, so that the first left staple fiber roving and the first right staple fiber roving are stretched in the lower rear stretching zone between the rear middle press-holding continuous conveying jaws and the middle press-holding continuous conveying jaws to obtain the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, or the second left staple fiber roving is stretched in the left middle rear stretching zone between the rear second press-holding continuous conveying jaws and the middle second press-holding continuous conveying jaws, and the second right staple fiber roving is stretched in the left middle rear stretching zone between the rear three press-holding continuous conveying jaws and the middle third press-holding continuous conveying jaws. The stretching action of the right middle and rear stretching zone between the conveying jaws obtains a second left short fiber bundle and a second right short fiber bundle with reduced linear density. At this time, the first left short fiber roving located at the rear side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the first left short fiber roving, the first left short fiber bundle located at the front side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side at the front arc point of the diameter maintained horizontally with the first left short fiber bundle, the first right short fiber roving located at the rear side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the left side The sleeve wall surface of the second rotating sleeve contacts at the rear arc point of the diameter maintained horizontally with the first right short fiber roving, the first right short fiber bundle located at the front side of the middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating middle and lower roller located on the left side at the front arc point of the diameter maintained horizontally with the first right short fiber bundle, or the second left short fiber roving located at the rear side of the middle second pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rotating middle and lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the second left short fiber roving, the second left short fiber bundle located at the front side of the middle second pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side The surface contacts at a front arc point of a diameter that is horizontal with the second left short fiber bundle, the second right short fiber roving located at the rear side of the middle second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating middle lower roller located on the left side at a rear arc point of a diameter that is horizontal with the second right short fiber roving, the second right short fiber bundle located at the front side of the middle second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating middle lower roller located on the left side at a front arc point of a diameter that is horizontal with the second right short fiber bundle, during the contact process, the rear arc point produces an upward driving effect on the short fibers in the first left short fiber roving, the first right short fiber roving or the second left short fiber roving, and the second right short fiber roving under the action of friction,Thereby, the short fibers in the short fiber roving before the drafting in the rear drafting zone are evenly distributed and arranged in the cross section, and then the upper arrangement of the short fiber roving is achieved. The front arc point drives the short fibers in the first left short fiber bundle, the first right short fiber bundle or the second left short fiber bundle, the second right short fiber bundle downward under the friction force, thereby achieving the even distribution and arrangement of the short fibers in the short fiber bundle obtained by the drafting in the rear drafting zone in the cross section, and then the lower arrangement of the short fiber bundle is achieved;,

[0011] Then, the first left short fiber bundle and the first right short fiber bundle are gripped and outputted through the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, or the second left short fiber bundle and the second right short fiber bundle are gripped and outputted through the first two pressing and holding continuous conveying jaws and the first three pressing and holding continuous conveying jaws respectively, so that the first left short fiber bundle and the first right short fiber bundle are stretched in the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain the first left short fiber strand and the first right short fiber strand with reduced linear density, or the second left short fiber bundle is stretched in the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the first two pressing and holding continuous conveying jaws, and the second right short fiber bundle is stretched in the middle three pressing and holding continuous conveying jaws and the first three pressing and holding continuous conveying jaws. The stretching action of the right middle front stretching zone between the conveying jaws obtains a second left staple fiber strand and a second right staple fiber strand with reduced linear density. At this time, the first left staple fiber bundle located at the rear side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the first left staple fiber bundle. The first left staple fiber strand located at the front side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side at the front arc point of the diameter maintained horizontally with the first left staple fiber strand. The sleeve wall surfaces of the two rotating sleeves are in contact at the rear arc point of the diameter maintained horizontally with the first right short fiber bundle, the first right short fiber strand located at the front side of the front middle pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating front bottom roller located on the left side at the front arc point of the diameter maintained horizontally with the first right short fiber strand, or the second left short fiber bundle located at the rear side of the first two pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating front bottom roller located on the right side at the rear arc point of the diameter maintained horizontally with the second left short fiber bundle, the second left short fiber strand located at the front side of the first two pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating front bottom roller located on the right side The surface contacts at a front arc point of a diameter that is horizontal with the second left staple fiber strand, the second right staple fiber bundle located at the rear side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side at a rear arc point of a diameter that is horizontal with the second right staple fiber bundle, the second right staple fiber strand located at the front side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side at a front arc point of a diameter that is horizontal with the second right staple fiber strand, during the contact process, the rear arc point produces an upward driving effect on the short fibers in the first left staple fiber bundle, the first right staple fiber bundle or the second left staple fiber bundle, and the second right staple fiber bundle under the action of friction,Thus, the short fibers in the short fiber bundle before the drafting in the front drafting zone are evenly distributed and arranged in the cross section, and then the short fiber bundle is arranged upward. The front arc point drives the short fibers in the first left short fiber strand, the first right short fiber strand or the second left short fiber strand, and the second right short fiber strand downward under the friction force, thereby achieving the even distribution and arrangement of the short fibers in the short fiber strands obtained by the drafting in the front drafting zone in the cross section, and then the short fiber strands are arranged downward.

[0012] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of the wrapped blended siro yarn, a first pair of short fiber rovings including a first left short fiber roving and a first right short fiber roving respectively unwound from two roving tubes are respectively gripped by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system, while a second pair of short fiber rovings including a second left short fiber roving and a second right short fiber roving respectively unwound from the two roving tubes are respectively gripped by the rear two pressing and holding continuous conveying jaws and the rear three pressing and holding continuous conveying jaws to enter the drafting system, while a third pair of short fiber rovings including a third left short fiber roving and a third right short fiber roving respectively unwound from the two roving tubes are respectively gripped by the rear one pressing and holding continuous conveying jaws and the rear four pressing and holding continuous conveying jaws to enter the drafting system, at which time the first left short fiber roving is successively gripped by the upper wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rear lower roller in contact with it before being gripped. The first right staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it before holding, and the lower finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it after holding. The second left staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rear bottom roller in contact with it before holding, and the lower finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rear bottom roller in contact with it after holding. The second right staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it before holding, and the lower finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it after holding.

[0013] Then, the first left staple roving and the first right staple roving are gripped and outputted through the left and right sides of the middle pressing and holding continuous conveying jaws respectively, during which the drafting action in the lower rear drafting zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving and the second right staple roving are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, during which the left middle rear drafting zone between the rear second pressing and holding continuous conveying jaws and the rear third pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving and the second right staple fiber roving are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, The stretching action of the right middle rear stretching zone between the continuous conveying jaw and the middle three pressing and holding continuous conveying jaws obtains the second left short fiber bundle and the second right short fiber bundle with reduced linear density. At the same time, the third left short fiber roving and the third right short fiber roving are respectively gripped and output by the middle one pressing and holding continuous conveying jaw and the middle four pressing and holding continuous conveying jaw. During this period, the stretching action in the upper left rear stretching zone between the rear one pressing and holding continuous conveying jaw and the middle one pressing and holding continuous conveying jaw, and the upper right rear stretching zone between the rear four pressing and holding continuous conveying jaws and the middle four pressing and holding continuous conveying jaws obtains the third left short fiber bundle and the third right short fiber bundle with reduced linear density. Right short fiber bundle, at this time, the first left short fiber roving is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve of the left rotating shaft sleeve group of the middle lower roller in contact with it before being held, and the first left short fiber strip obtained by drawing after holding is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve of the left rotating shaft sleeve group of the middle lower roller in contact with it, and the first right short fiber roving is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the middle lower roller in contact with it before being held, and the first right short fiber strip obtained by drawing after holding is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the middle lower roller in contact with it. The second left staple roving is subjected to the upper finishing effect of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the middle lower roller in contact with it before being held, and the second left staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the middle lower roller in contact with it, and the second right staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the middle lower roller in contact with it;

[0014] Then, the first left staple fiber strip and the first right staple fiber strip are gripped and outputted by the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, during which the first left staple fiber strip and the first right staple fiber strip with reduced linear density are obtained by the stretching action of the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws, and at the same time, the second left staple fiber strip and the second right staple fiber strip are gripped and outputted by the front two pressing and holding continuous conveying jaws and the front three pressing and holding continuous conveying jaws respectively, during which the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the front two pressing and holding continuous conveying jaws and the middle three pressing and holding continuous conveying jaws are used to stretch the fiber strips. The stretching action of the right middle front stretching zone between the continuous conveying jaw and the first three pressing and holding continuous conveying jaws obtains the second left staple fiber strip and the second right staple fiber strip with reduced linear density. At the same time, the third left staple fiber strip and the third right staple fiber strip are respectively grasped and output by the previous pressing and holding continuous conveying jaw and the first four pressing and holding continuous conveying jaws. During this period, the stretching action in the left upper front stretching zone between the middle pressing and holding continuous conveying jaw and the previous pressing and holding continuous conveying jaw, and the right upper front stretching zone between the middle four pressing and holding continuous conveying jaws and the first four pressing and holding continuous conveying jaws obtains the third left staple fiber strip and the third right staple fiber strip with reduced linear density. Right staple fiber strip, at this time, the first left staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the front bottom roller in contact with it before being grasped, and the first left staple fiber strip obtained by stretching after grasping is subjected to the lower sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the front bottom roller in contact with it, and the first right staple fiber strip obtained by stretching after grasping is subjected to the lower sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the front bottom roller in contact with it. The second left staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the front lower roller in contact with it before being held, and the second left staple fiber strip obtained by stretching after holding is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the front lower roller in contact with it. The second right staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the front lower roller in contact with it before being held, and the second right staple fiber strip obtained by stretching after holding is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the front lower roller in contact with it.

[0015] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of pure spun single yarn, the short fiber slivers output by the drafting system are twisted under the action of the twisting twist transmitted from the spinning machine twisting system to obtain the final pure spun single yarn, and the pure spun single yarn is wound on the spun yarn tube in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spun yarn tube to rotate. The rotation of the spun yarn tube then drives the pure spun single yarn to pass through the yarn guide hook and the steel wire ring in turn and be wound on the spun yarn tube, so that the steel wire ring rotates around the steel collar. At this time, since the pure spun single yarn is a flexible structure and due to the weight of the steel wire ring itself, the winding speed of the pure spun single yarn on the spun yarn tube is less than the rotation speed of the spun yarn tube, and the speed difference between the two produces twisting twist, which is transmitted from bottom to top. When it is transmitted to the twisting point, the short fiber slivers are twisted under the action of the twisting twist to obtain the required pure spun single yarn.

[0016] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of pure spun siro yarn, the first left staple fiber strand and the first right staple fiber strand or the second left staple fiber strand and the second right staple fiber strand output by the drafting system are twisted under the action of the twisting twist transmitted by the twisting system of the spinning frame to obtain pure spun siro yarn, and the pure spun siro yarn is wound on the spinning tube in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spinning tube to rotate. The rotation of the spinning tube then drives the pure spun siro yarn to pass through the yarn guide hook and the wire ring in turn and be wound on the spinning tube, from The wire ring rotates around the steel collar. At this time, due to the flexible structure of the pure spun twin yarn and the weight of the wire ring itself, the winding speed of the pure spun twin yarn on the spun yarn tube is lower than the rotation speed of the spun yarn tube. The speed difference between the two produces twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to be transmitted separately along the direction of the first left staple fiber strip and the first right staple fiber strip or the second left staple fiber strip and the second right staple fiber strip, so that the first left staple fiber strip or the second left staple fiber strip is twisted under the action of the transmitted first sub-twist to obtain the first left sub-yarn or the second right staple fiber strip. Two left sub-yarns, so that the first right staple fiber strip or the second right staple fiber strip is twisted under the action of the second sub-twist transmitted to obtain the first right sub-yarn or the second right sub-yarn, the first left sub-yarn and the first right sub-yarn are made into the final first twin yarn under the action of the twist twist transmitted at the lower twisting point, or the second left sub-yarn and the second right sub-yarn are made into the final second twin yarn under the action of the twist twist transmitted at the lower twisting point. At this time, since the spacing between the first left staple fiber strip and the first right staple fiber strip is greater than the spacing between the second left staple fiber strip and the second right staple fiber strip, the first left staple fiber strip is made into the final second twin yarn along the first left staple fiber strip. The first sub-twist transmitted is greater than the first sub-twist transmitted along the second left staple fiber strip, so that the second sub-twist transmitted along the second left staple fiber strip is greater than the second sub-twist transmitted along the second right staple fiber strip, and then the twisting twist of the first left sub-yarn and the first right sub-yarn is greater than the twisting twist of the second left sub-yarn and the second right sub-yarn, and at the same time, the winding twist of the first left sub-yarn and the first right sub-yarn in the first twin yarn is less than the winding twist of the second left sub-yarn and the second right sub-yarn in the second twin yarn, and then the layered plying phenomenon in the first twin yarn is less than the layered plying phenomenon in the second twin yarn.

[0017] A method for producing a wrapped blended yarn as described above, wherein preferably, in the production of the wrapped blended siro yarn, a first pair of staple fiber whiskers including a first left staple fiber whisker and a first right staple fiber whisker, a second pair of staple fiber whiskers including a second left staple fiber whisker and a second right staple fiber whisker, and a third pair of staple fiber whiskers including a third left staple fiber whisker and a third right staple fiber whisker outputted by the drafting system are output in a spatially overlapped state at the bottom, middle and top. Under the action of the twisting twist transmitted from the spinning frame twisting system, the first pair of staple fiber whiskers are twisted with each other to form an inner layer yarn, the second pair of staple fiber whiskers are twisted with each other and simultaneously form a middle layer yarn that spatially wraps the first pair of staple fiber whiskers, the third pair of staple fiber whiskers are twisted with each other and simultaneously form the first pair of staple fiber whiskers, The second pair of staple fiber strips are spatially wrapped with an outer layer of yarn, thereby finally twisting to obtain the required wrapped blended yarn, and the wrapped blended yarn is wound on the spun yarn tube in a clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spun yarn tube to rotate. The rotation of the spun yarn tube then drives the wrapped blended yarn to pass through the yarn guide hook and the wire ring in turn and wind around the spun yarn tube, so that the wire ring rotates around the steel collar. At this time, due to the flexible structure of the wrapped blended yarn and the weight of the wire ring itself, the winding speed of the wrapped blended yarn on the spun yarn tube is lower than the rotation speed of the spun yarn tube. The speed difference between the two produces twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to rotate along the first left and right sides respectively. The directions of the staple fiber whiskers and the first right staple fiber whiskers, the second left staple fiber whiskers and the second right staple fiber whiskers, the third left staple fiber whiskers and the third right staple fiber whiskers are transmitted separately, so that the first left staple fiber whiskers are twisted under the action of the transmitted first left sub-twist to obtain the first left sub-yarn, the first right staple fiber whiskers are twisted under the action of the transmitted first right sub-twist to obtain the first right sub-yarn, and at the same time, the first left sub-yarn and the first right sub-yarn are twisted and entangled with each other at the inner lower twisting point to form an inner yarn, the second left staple fiber whiskers are twisted under the action of the transmitted second left sub-twist to obtain the second left sub-yarn, the second right staple fiber whiskers are twisted under the action of the transmitted second right sub-twist to obtain the second right sub-yarn, and at the same time, the second left sub-yarn and the second right sub-yarn are twisted with each other at the middle and lower twisting point. The middle layer yarn is twisted and wound into the middle layer yarn, and the second left sub-yarn and the second right sub-yarn are twisted and wound with each other at the middle and lower twisting point, and the inner layer yarn is wrapped around, so as to obtain the middle-inner layer wrapped yarn, wherein the middle and lower twisting point is located in front of and below the inner lower twisting point, the third left staple fiber strands are twisted under the action of the transmitted third left sub-twist to obtain the third left sub-yarn, and the third right staple fiber strands are twisted under the action of the transmitted third right sub-twist to obtain the third right sub-yarn, and at the same time, the third left sub-yarn and the third right sub-yarn are twisted and wound with each other at the outer and lower twisting point to form the outer layer yarn, and the third left sub-yarn and the third right sub-yarn are twisted and wound with each other at the outer and lower twisting point, and the middle-inner layer wrapped yarn is wrapped around, so as to obtain the final wrapped blended yarn, wherein the outer and lower twisting point is located in front of and below the middle and lower twisting point.

[0018] Compared with the prior art, the present invention adopts three rows of drafting roller pairs of front, middle and rear which are driven separately, and the roller shaft of the lower roller of each drafting roller pair is sleeved with a left and right rotating shaft sleeve group which is arranged axially symmetrically, and the left and right rotating shaft group includes a first rotating shaft sleeve and a second rotating shaft sleeve which are concentrically nested, and one end of the second rotating shaft sleeve extends out of the first rotating shaft sleeve, and the rubber roller shaft of the upper rubber roller is sleeved with a left and right rubber roller sleeve group which is arranged axially symmetrically, and the left and right rubber roller sleeve groups include a first rubber roller sleeve, a second rubber roller sleeve and a third rubber roller sleeve of a first diameter, so that left and right symmetrical jaws for pressing, holding and feeding corresponding three pairs of short fiber rovings are respectively formed on the roller shaft, the first rotating shaft sleeve and the second rotating shaft sleeve in the left and right rotating shaft sleeve group, so that the first pair of short fiber rovings which are pressed and stretched and outputted on the roller shaft are realized. The staple fibers, the second pair of staple fibers stretched and output after being pressed on the second rotating sleeve, and the third pair of staple fibers stretched and output after being pressed on the first rotating sleeve are output from the stretching system in a spatially overlapping state of lower, middle and upper parts, thereby realizing the mutual twisting of the first pair of staple fibers into inner yarns, the mutual twisting of the second pair of staple fibers into middle yarns that spatially wrap the first pair of staple fibers, and the mutual twisting of the third pair of staple fibers into outer yarns that spatially wrap the first pair of staple fibers and the second pair of staple fibers, thereby realizing the production of the required wrapped blended yarns, and then realizing direct blending in the spinning process and arranging different fiber components in the blended yarns in layers, thereby improving the blending efficiency and realizing different blending purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the wrapped blended yarn production device of the present invention.

[0020] Explanation of the accompanying drawings: 1-first left staple roving, 2-second left staple roving, 3-third left staple roving, 4-first right staple roving, 5-second right staple roving, 6-third right staple roving, 7-rear lower roller, 8-rear upper rubber roller, 9-middle lower roller, 10-middle upper rubber roller, 11-front lower roller, 12-front upper rubber roller, 13-roller shaft, 14-second rotating sleeve, 15-first rotating sleeve, 16-first rubber roller sleeve, 17-second rubber roller sleeve, 18-middle rubber roller sleeve, 19-first servo motor, 20-second servo motor, 21-third servo motor, 22-programmable logic controller, 23-yarn guide hook, 24-wire ring, 25-steel collar, 26-spinning tube, 27-rubber roller shaft. 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 purpose of the present invention is to provide a method for producing wrapped blended yarn, by sleeves of left and right rotating shaft sleeves arranged in an axisymmetric manner on the roller shaft of the lower roller of each drafting roller pair, and sleeves of left and right rubber roller sleeves arranged in an axisymmetric manner on the rubber roller shaft of the upper rubber roller, so as to achieve direct blending in the spinning process and produce wrapped blended yarn with different fiber components arranged in layers, thereby improving the blending efficiency and achieving different blending purposes.

[0023] The present invention relates to a method for producing a wrapped blended yarn, and a production device for a wrapped blended yarn is used. Figure 1As shown, the production device of the wrapped blended yarn includes a drafting system, and the drafting system includes three rows of drafting rollers: a rear drafting roller pair, a middle drafting roller pair, and a front drafting roller pair. The rear drafting roller pair includes a rear lower roller 7 and a rear upper rubber roller 8, the middle drafting roller pair includes a middle lower roller 9 and a middle upper rubber roller 10, and the front drafting roller pair includes a front lower roller 11 and a front upper rubber roller 12. The rear lower roller 7, the middle lower roller 9, and the front lower roller 11 have the same structure. The rear lower roller 7, the middle lower roller 9, and the front lower roller 11 include a roller shaft 13, which is made of iron or steel and is a solid cylindrical structure. The roller shafts 13 of the rear lower roller 7 of all spindles on the front car table of the spinning frame are integrally connected, and the roller shafts 13 of the middle lower roller 9 are connected to each other. The roller shafts 13 of the front lower roller 11 are integratedly connected, the roller shafts 13 of the rear lower rollers 7 of all spindles on the rear table of the spinning machine are integratedly connected, the roller shafts 13 of the middle lower rollers 9 are integratedly connected, and the roller shafts 13 of the front lower roller 11 are integratedly connected. The roller shafts 13 are sleeved with a left rotating shaft sleeve group and a right rotating shaft sleeve group that are axially symmetrically arranged. The left rotating shaft sleeve group and the right rotating shaft sleeve group include a first rotating shaft sleeve 15 and a second rotating shaft sleeve 14. The first rotating shaft sleeve 15 and the second rotating shaft sleeve 14 are both cylindrical hollow structures with open left and right ends. The materials of the first rotating shaft sleeve 15 and the second rotating shaft sleeve 14 are exactly the same as those of the roller shaft 13. The second rotating shaft sleeve 14 is directly sleeved on the roller shaft 13. On the shaft 13, the second rotating shaft sleeve 14 is integrated and fixedly connected with the roller shaft 13, and a certain distance is maintained between the right end of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group, a certain distance is maintained between the left end of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the left end of the roller shaft 13 of the spindle position, and a certain distance is maintained between the right end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group and the right end of the roller shaft 13 of the spindle position, the first rotating shaft sleeve 15 is nested on the second rotating shaft sleeve 14, the left end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group is aligned with the left end of the roller shaft 13 of the spindle position, and the left end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group is aligned with the left end of the roller shaft 13 of the spindle position The first rotating sleeve 15 between the left end of the second rotating sleeve 14 and the roller shaft 13 are integrally fixedly connected, a certain gap is maintained between the first rotating sleeve 15 and the second rotating sleeve 14 of the left rotating sleeve group located between the right end of the second rotating sleeve 14 and the right end of the first rotating sleeve 15, the right end of the second rotating sleeve 14 of the left rotating sleeve group is located on the left side of the right end of the first rotating sleeve 15 and a certain distance is maintained between the two, the right end of the first rotating sleeve 15 of the right rotating sleeve group is aligned with the right end of the roller shaft 13 of the spindle position, and the first rotating sleeve 15 of the right rotating sleeve group located between the right end of the first rotating sleeve 15 and the right end of the second rotating sleeve 14 and the roller shaft 13 are integrally fixedly connected,A certain gap is maintained between the first rotating sleeve 15 and the second rotating sleeve 14 of the right rotating sleeve group, which are located between the left end of the second rotating sleeve 14 and the left end of the first rotating sleeve 15. The left end of the second rotating sleeve 14 of the right rotating sleeve group is located on the right side of the left end of the first rotating sleeve 15, and a certain distance is maintained between the two.

[0024] The structures of the rear upper rubber roller 8, the middle upper rubber roller 10 and the front upper rubber roller 12 are the same. The rear upper rubber roller 8, the middle upper rubber roller 10 and the front upper rubber roller 12 include a rubber roller shaft 27. The rubber roller shaft 27 is made of iron or steel and is a solid cylindrical structure. A spindle position on the front car table of the spinning frame and an adjacent spindle position on the left or right side form a spindle position group. A spindle position on the rear car table of the spinning frame and an adjacent spindle position on the left or right side form a spindle position group. The rubber roller shafts 27 of the rear upper rubber roller 8 of the two spindles of each spindle position group on the front car table of the spinning frame are integrally connected, the rubber roller shafts 27 of the middle upper rubber roller 10 are integrally connected, and the rubber roller shafts 27 of the front upper rubber roller 12 are integrally connected. The two spindles of each spindle position group on the rear car table of the spinning frame The rubber roller shafts 27 of the rear upper rubber roller 8, the rubber roller shafts 27 of the middle upper rubber roller 10, and the rubber roller shafts 27 of the front upper rubber roller 12 are integrally connected. A left rubber roller set and a right rubber roller set arranged in an axisymmetric manner are sleeved on the rubber roller shaft 27. The left rubber roller set and the right rubber roller set include a first rubber roller set 16 and a second rubber roller set 17. A middle rubber roller set 18 is arranged between the left rubber roller set and the right rubber roller set. The first rubber roller set 16, the second rubber roller set 17, and the middle rubber roller set 18 are respectively connected to the rubber roller shaft 27 through bearings, so that the first rubber roller set 16, the second rubber roller set 17, and the middle rubber roller set 18 can rotate freely around the rubber roller shaft 27 independently. The diameter of the first rubber roller set 16 is smaller than the diameter of the second rubber roller set 17. The diameter of the rubber roller sleeve 17 is smaller than the diameter of the middle rubber roller sleeve 18. The left end of the first rubber roller sleeve 16 of the left rubber roller sleeve group is vertically aligned with the left end of the rubber roller shaft 27, and is vertically aligned with the left end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group. The right end of the first rubber roller sleeve 16 of the left rubber roller sleeve group is vertically aligned with the right end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group. The left end of the second rubber roller sleeve 17 of the left rubber roller sleeve group is vertically aligned with the right end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group. The right end of the second rubber roller sleeve 17 of the left rubber roller sleeve group is vertically aligned with the right end of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group. The right end of the first rubber roller sleeve 16 of the right rubber roller sleeve group is vertically aligned with the right end of the rubber roller shaft 27, and is vertically aligned with the right end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group. The left end of the first rubber roller sleeve 16 of the right rubber roller set is vertically aligned with the left end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve set, the right end of the second rubber roller sleeve 17 of the right rubber roller set is vertically aligned with the left end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve set, the left end of the second rubber roller sleeve 17 of the right rubber roller set is vertically aligned with the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve set, the left end of the middle rubber roller sleeve 18 is vertically aligned with the right end of the second rotating shaft sleeve 14 of the left rotating shaft sleeve set, the right end of the middle rubber roller sleeve 18 is vertically aligned with the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve set, the rubber roller shaft 27 between the right rubber roller set of the rear upper rubber roller 8 of the left spindle position in a spindle position group and the left rubber roller set of the rear upper rubber roller 8 of the right spindle position is embedded in the rear embedding grip of the pressure assembly,Thus, the rear upper rubber roller 8 is installed on the pressurizing assembly. The rubber roller shaft 27 between the right rubber roller set of the middle upper rubber roller 10 of the left spindle in a spindle position group and the left rubber roller set of the middle upper rubber roller 10 of the right spindle position is embedded in the middle embedding grip of the pressurizing assembly, thereby realizing the installation of the middle upper rubber roller 10 on the pressurizing assembly. The rubber roller shaft 27 between the right rubber roller set of the front upper rubber roller 12 of the left spindle in a spindle position group and the left rubber roller set of the front upper rubber roller 12 of the right spindle position is embedded in the front embedding grip of the pressurizing assembly, thereby realizing the installation of the front upper rubber roller 12 on the pressurizing assembly.

[0025] The roller shaft 13 of the rear lower roller 7 is driven to rotate by the first servo motor 19, the roller shaft 13 of the middle lower roller 9 is driven to rotate by the second servo motor 20, and the roller shaft 13 of the front lower roller 11 is driven to rotate by the third servo motor 21. The first servo motor 19, the second servo motor 20, and the third servo motor 21 are all connected to the programmable logic controller 22.

[0026] When in use, the pressure assembly is pressed downward, so that the first rubber roller sleeve 16 of the left rubber roller sleeve group of the rear upper rubber roller 8 is closely pressed and contacted with the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear lower roller 7, so that a rear pressing and holding jaw is formed between the first rubber roller sleeve 16 of the left rubber roller sleeve group of the rear upper rubber roller 8 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear lower roller 7, so that the second rubber roller sleeve 17 of the left rubber roller sleeve group of the rear upper rubber roller 8 and the left rotating shaft sleeve group of the rear lower roller 7 are tightly pressed and contacted. The second rotating shaft sleeve 14 extending out of the first rotating shaft sleeve 15 is tightly pressed and contacted between the second rubber roller sleeve 17 of the left rubber roller sleeve group of the rear upper rubber roller 8 and the second rotating shaft sleeve 14 extending out of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear lower roller 7, so that the middle rubber roller sleeve 18 of the rear upper rubber roller 8 and the roller shaft 18 between the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rear lower roller 7 are tightly pressed and contacted. 3 is pressed and contacted tightly, so that a rear middle pressing and holding jaw is formed between the middle rubber roller sleeve 18 of the rear upper rubber roller 8 and the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rear bottom roller 7, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear upper rubber roller 8 and the second rotating shaft sleeve 14 extending from the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rear bottom roller 7 are pressed and contacted tightly ... rear bottom roller 7 are pressed and contacted tightly, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear upper rubber roller 8 and the second rotating shaft sleeve 14 extending from the first rotating shaft sleeve 15 of the rear bottom roller 7 are pressed and contacted tightly, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear upper rubber roller 8 and the second rotating shaft sleeve 17 of the right rubber roller sleeve group of the rear bottom roller 7 and the second rotating shaft sleeve 17 of the right rubber roller sleeve group of the rear upper rubber roller 8 and the second rotating shaft sleeve 17 of the right rubber roller sleeve group of the rear bottom roller 7 and the second rotating shaft sleeve 17 of the right rubber roller sleeve group of the rear The rear three pressing and holding jaws are formed between the sleeve 17 and the second rotating sleeve 14 of the right rotating shaft sleeve group of the rear lower roller 7 that extends out from the first rotating sleeve 15, so that the first rubber roller sleeve 16 of the right rubber roller sleeve group of the rear upper rubber roller 8 is in close pressing contact with the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rear lower roller 7, thereby forming the rear four pressing and holding jaws between the first rubber roller sleeve 16 of the right rubber roller sleeve group of the rear upper rubber roller 8 and the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rear lower roller 7.

[0027] At the same time, the first rubber roller sleeve 16 of the left rubber roller set of the middle upper rubber roller 10 is tightly pressed and contacted with the first rotating shaft sleeve 15 of the left rotating shaft sleeve set of the middle lower roller 9, so that a middle pressing and holding jaw is formed between the first rubber roller sleeve 16 of the left rubber roller set of the middle upper rubber roller 10 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve set of the middle lower roller 9, so that the second rubber roller sleeve 17 of the left rubber roller set of the middle upper rubber roller 10 and the extended first rotating shaft sleeve of the left rotating shaft sleeve set of the middle lower roller 9 The second rotating shaft sleeve 14 of the middle rubber roller 15 is tightly pressed and contacted, so that the second rubber roller sleeve 17 of the left rubber roller sleeve group of the middle upper rubber roller 10 and the second rotating shaft sleeve 14 of the left rotating shaft sleeve group extending from the first rotating shaft sleeve 15 of the middle lower roller 9 are formed between the middle rubber roller sleeve 18 of the middle upper rubber roller 10 and the roller shaft 13 located between the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the middle lower roller 9 are tightly pressed and contacted. The middle rubber roller sleeve 18 of the middle upper rubber roller 10 and the second rotating shaft sleeve 14 of the middle lower roller 9 located in the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group are formed by pressing and holding the jaws, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the middle upper rubber roller 10 and the second rotating shaft sleeve 14 extending out of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9 are closely pressed and contacted, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the middle upper rubber roller 10 is in close contact with each other. A middle three-way pressing and holding jaw is formed between 7 and the second rotating shaft sleeve 14 extending out of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9, so that the first rubber roller sleeve 16 of the right rubber roller sleeve group of the middle upper rubber roller 10 is in close pressing contact with the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9, thereby forming a middle four-way pressing and holding jaw between the first rubber roller sleeve 16 of the right rubber roller sleeve group of the middle upper rubber roller 10 and the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9.

[0028] At the same time, the first rubber roller sleeve 16 of the left rubber roller sleeve group of the front upper rubber roller 12 is closely pressed and contacted with the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the front lower roller 11, so that a front pressing and holding jaw is formed between the first rubber roller sleeve 16 of the left rubber roller sleeve group of the front upper rubber roller 12 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the front lower roller 11, so that the second rubber roller sleeve 17 of the left rubber roller sleeve group of the front upper rubber roller 12 and the extended first rotating shaft of the left rotating shaft sleeve group of the front lower roller 11 are The second rotating shaft sleeve 14 of the left rubber roller sleeve 15 is tightly pressed and contacted, so that the first two pressing and holding jaws are formed between the second rubber roller sleeve 17 of the left rubber roller sleeve group of the front upper rubber roller 12 and the second rotating shaft sleeve 14 of the left rotating shaft sleeve group extending from the first rotating shaft sleeve 15 of the front lower roller 11, so that the middle rubber roller sleeve 18 of the front upper rubber roller 12 and the roller shaft 13 located between the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the front lower roller 11 are tightly pressed and contacted. The front rubber roller 12 is in contact with the middle rubber roller sleeve 18, thereby forming a front middle pressing and holding jaw between the second rotating shaft sleeve 14 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the front bottom roller 11, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the front rubber roller 12 is in close pressing contact with the second rotating shaft sleeve 14 of the right rotating shaft sleeve group extending out of the first rotating shaft sleeve 15 of the front bottom roller 11, thereby the second rubber roller sleeve 17 of the right rubber roller sleeve group of the front rubber roller 12 is in close pressing contact with the second rubber roller sleeve 17 of the right rubber roller sleeve group of the front rubber roller 12. The front three pressing and holding jaws are formed between the second rotating shaft sleeve 14 of the right rotating shaft sleeve group extending out from the first rotating shaft sleeve 15 of the front lower roller 11, so that the first rubber roller sleeve 16 of the right rubber roller sleeve group of the front upper rubber roller 12 is in close pressing contact with the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the front lower roller 11, thereby forming the front four pressing and holding jaws between the first rubber roller sleeve 16 of the right rubber roller sleeve group of the front upper rubber roller 12 and the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the front lower roller 11.

[0029] The first servo motor 19 drives the roller shaft 13 of the rear lower roller 7 to rotate, and then drives the middle rubber roller sleeve 18 of the rear upper rubber roller 8 in close pressing contact therewith to rotate, so that the rear middle pressing and holding jaw is transformed into the rear middle pressing and holding continuous conveying jaw, the roller shaft 13 of the rear lower roller 7 rotates and then drives the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear lower roller 7 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the left rubber roller sleeve group of the rear upper rubber roller 8 in close pressing contact therewith to rotate around the rubber roller shaft 27, so that the rear pressing and holding jaw is transformed into the rear pressing and holding continuous conveying jaw, the roller shaft 13 of the rear lower roller 7 rotates and then drives the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rear lower roller 7 integrally connected thereto to rotate, and then drives the second rubber roller sleeve of the left rubber roller sleeve group of the rear upper rubber roller 8 in close pressing contact therewith. 17 rotates around the rubber roller shaft 27, thereby transforming the rear two pressing and holding jaws into the rear two pressing and holding continuous conveying jaws, the roller shaft 13 of the rear lower roller 7 rotates and then drives the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rear lower roller 7 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the right rubber roller sleeve group of the rear upper rubber roller 8 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the rear four pressing and holding jaws into the rear four pressing and holding continuous conveying jaws, the roller shaft 13 of the rear lower roller 7 rotates and then drives the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rear lower roller 7 integrally connected thereto to rotate, and then drives the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear upper rubber roller 8 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the rear three pressing and holding jaws into the rear three pressing and holding continuous conveying jaws.

[0030] The second servo motor 20 drives the roller shaft 13 of the middle and lower roller 9 to rotate, and then drives the middle rubber roller sleeve 18 of the middle and upper rubber roller 10 which is in close pressing contact with it to rotate, so that the middle pressing and holding jaw is transformed into the middle pressing and holding continuous conveying jaw, the roller shaft 13 of the middle and lower roller 9 rotates and then drives the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the middle and lower roller 9 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the left rubber roller sleeve group of the middle and upper rubber roller 10 which is in close pressing contact with it to rotate around the rubber roller shaft 27, so that the middle-first pressing and holding jaw is transformed into the middle-first pressing and holding continuous conveying jaw, the roller shaft 13 of the middle and lower roller 9 rotates and then drives the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the middle and lower roller 9 which is integrally connected thereto to rotate, and then drives the second rubber roller of the left rubber roller sleeve group of the middle and upper rubber roller 10 which is in close pressing contact with it. The sleeve 17 rotates around the rubber roller shaft 27, thereby transforming the middle two pressing and holding jaws into the middle two pressing and holding continuous conveying jaws, the roller shaft 13 of the middle lower roller 9 rotates and then drives the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the right rubber roller sleeve group of the middle upper rubber roller 10 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the middle four pressing and holding jaws into the middle four pressing and holding continuous conveying jaws, the roller shaft 13 of the middle lower roller 9 rotates and then drives the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the middle lower roller 9 integrally connected thereto to rotate, and then drives the second rubber roller sleeve 17 of the right rubber roller sleeve group of the middle upper rubber roller 10 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the middle three pressing and holding jaws into the middle three pressing and holding continuous conveying jaws.

[0031] The third servo motor 21 drives the roller shaft 13 of the front lower roller 11 to rotate, and then drives the middle rubber roller sleeve 18 of the front upper rubber roller 12 which is in close pressing contact with it to rotate, so that the front middle pressing and holding jaw is transformed into the front middle pressing and holding continuous conveying jaw, the roller shaft 13 of the front lower roller 11 rotates and then drives the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the front lower roller 11 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the left rubber roller sleeve group of the front upper rubber roller 12 which is in close pressing contact with it to rotate around the rubber roller shaft 27, so that the middle front pressing and holding jaw is transformed into the front pressing and holding continuous conveying jaw, the roller shaft 13 of the front lower roller 11 rotates and then drives the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the front lower roller 11 which is integrally connected thereto to rotate, and then drives the second rubber roller sleeve 16 of the left rubber roller sleeve group of the front upper rubber roller 12 which is in close pressing contact with it. The roller sleeve 17 rotates around the rubber roller shaft 27, thereby transforming the first two pressing and holding jaws into the first two pressing and holding continuous conveying jaws, the roller shaft 13 of the front lower roller 11 rotates and then drives the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the front lower roller 11 fixedly connected thereto to rotate, and then drives the first rubber roller sleeve 16 of the right rubber roller sleeve group of the front upper rubber roller 12 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the first four pressing and holding jaws into the front four pressing and holding continuous conveying jaws, the roller shaft 13 of the front lower roller 11 rotates and then drives the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the front lower roller 11 integrally connected thereto to rotate, and then drives the second rubber roller sleeve 17 of the right rubber roller sleeve group of the front upper rubber roller 12 in close pressing contact with it to rotate around the rubber roller shaft 27, thereby transforming the first three pressing and holding jaws into the front three pressing and holding continuous conveying jaws.

[0032] Spinning includes the production of pure single yarn, pure siro yarn and wrapped blended siro yarn. For the production of pure single yarn, a short fiber roving unwound from the roving tube is first held by the rear middle pressing and holding continuous conveying jaws and enters the drafting system, and then held and output by the middle pressing and holding continuous conveying jaws. During this period, it is subjected to the drafting effect of the lower rear drafting zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws to obtain a short fiber bundle with reduced linear density. The short fiber bundle is then held and output from the drafting system by the front middle pressing and holding continuous conveying jaws. During this period, it is subjected to the drafting effect of the lower front drafting zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain a short fiber strand with reduced linear density, thereby completing the drafting effect of the fed short fiber roving in the drafting system.

[0033] For the production of pure spun twin yarn, the first short fiber roving pair including the first left short fiber roving 1 and the first right short fiber roving 4 unwound from the two roving tubes is selected to be gripped by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system respectively, or the second short fiber roving pair including the second left short fiber roving 2 and the second right short fiber roving 5 unwound from the two roving tubes is selected to be gripped by the rear second pressing and holding continuous conveying jaws and the rear third pressing and holding continuous conveying jaws to enter the drafting system respectively. At this time, the first left short fiber roving 1 located at the rear side of the rear middle pressing and holding continuous conveying jaw and the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating rear lower roller 7 located on the right side are kept in contact with the first left short fiber roving 1 The first left staple roving 1 located at the front side of the rear middle pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating rear lower roller 7 located on the right side at the front arc point of the diameter maintained horizontally with the first left staple roving 1, the first right staple roving 4 located at the rear side of the rear middle pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating rear lower roller 7 located on the left side at the rear arc point of the diameter maintained horizontally with the first right staple roving 4, the first right staple roving 4 located at the front side of the rear middle pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating rear lower roller 7 located on the left side at the rear arc point of the diameter maintained horizontally with the first right staple roving 4 The sleeve wall surface is in contact with the first right staple roving 4 at a front arc point of a diameter that is horizontal, or the second left staple roving 2 located at the rear side of the second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating rear lower roller 7 located on the right side at a rear arc point of a diameter that is horizontal to the second left staple roving 2, the second left staple roving 2 located at the front side of the second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating rear lower roller 7 located on the right side at a front arc point of a diameter that is horizontal to the second left staple roving 2, the second right staple roving 5 located at the rear side of the second pressing and holding continuous conveying jaws contacts with the rotating rear lower roller 7 located on the left side. The sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group contacts at the rear arc point of the diameter kept horizontal with the second right staple roving 5, and the second right staple roving 5 located at the front side of the rear two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the rotating rear lower roller 7 located on the left side at the front arc point of the diameter kept horizontal with the second right staple roving 5. During the contact process, the rear arc point drives the short fibers in the first left staple roving 1, the first right staple roving 4 or the second left staple roving 2, and the second right staple roving 5 upward under the friction force, thereby realizing the uniform distribution of the short fibers in the staple roving in the cross section, and then realizing the upper finishing of the staple roving.The front arc point drives the short fibers in the first left short fiber roving 1, the first right short fiber roving 4 or the second left short fiber roving 2, the second right short fiber roving 5 downward under the friction force, thereby achieving uniform distribution of the short fibers in the short fiber roving in the cross section, and then achieving the downward finishing of the short fiber roving.

[0034] Then, the first left staple fiber roving 1 and the first right staple fiber roving 4 are gripped and outputted through the left and right sides of the middle press-holding continuous conveying jaws respectively, or the second left staple fiber roving 2 and the second right staple fiber roving 5 are gripped and outputted through the middle two press-holding continuous conveying jaws and the middle three press-holding continuous conveying jaws respectively, so that the first left staple fiber roving 1 and the first right staple fiber roving 4 are stretched in the lower rear stretching zone between the rear middle press-holding continuous conveying jaws and the middle press-holding continuous conveying jaws to obtain the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, or the second left staple fiber roving 2 is stretched in the left middle rear stretching zone between the rear two press-holding continuous conveying jaws and the middle two press-holding continuous conveying jaws, and the second right staple fiber roving 5 is stretched in the rear three press-holding continuous conveying jaws. The stretching action of the right middle rear stretching zone between the feeding jaw and the middle three pressing and holding continuous conveying jaws obtains a second left short fiber bundle and a second right short fiber bundle with reduced linear density. At this time, the first left short fiber roving 1 located at the rear side of the middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating middle lower roller 9 located on the right side at the rear arc point of the diameter maintained horizontally with the first left short fiber roving 1, and the first left short fiber bundle located at the front side of the middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating middle lower roller 9 located on the right side at the front arc point of the diameter maintained horizontally with the first left short fiber bundle. The roving 4 contacts the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating middle lower roller 9 on the left side at the rear arc point of the diameter kept horizontal with the first right short fiber roving 4, the first right short fiber bundle located in front of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating middle lower roller 9 on the left side at the front arc point of the diameter kept horizontal with the first right short fiber bundle, or the second left short fiber roving 2 located in the rear side of the middle second pressing and holding continuous conveying jaw contacts the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating middle lower roller 9 on the right side at the rear arc point of the diameter kept horizontal with the second left short fiber roving 2, The second left short fiber bundle at the front side of the jaws contacts the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating middle lower roller 9 on the right side at the front arc point of the diameter kept horizontal with the second left short fiber bundle, the second right short fiber roving 5 located at the rear side of the middle second pressing and holding continuous conveying jaws contacts the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rotating middle lower roller 9 on the left side at the rear arc point of the diameter kept horizontal with the second right short fiber roving 5, the second right short fiber bundle located at the front side of the middle second pressing and holding continuous conveying jaws contacts the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rotating middle lower roller 9 on the left side at the front arc point of the diameter kept horizontal with the second right short fiber bundle, during the contact process,The rear arc point drives the short fibers in the first left short fiber roving 1, the first right short fiber roving 4 or the second left short fiber roving 2, the second right short fiber roving 5 upward under the friction force, thereby realizing the uniform distribution and finishing of the short fibers in the short fiber roving before the drafting in the rear drafting zone in the cross section, and then realizing the upper finishing of the short fiber roving. The front arc point drives the short fibers in the first left short fiber bundle, the first right short fiber bundle or the second left short fiber bundle, the second right short fiber bundle downward under the friction force, thereby realizing the uniform distribution and finishing of the short fibers in the short fiber bundle obtained by the drafting in the rear drafting zone in the cross section, and then realizing the lower finishing of the short fiber bundle.

[0035] Then, the first left short fiber bundle and the first right short fiber bundle are gripped and outputted through the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, or the second left short fiber bundle and the second right short fiber bundle are gripped and outputted through the first two pressing and holding continuous conveying jaws and the first three pressing and holding continuous conveying jaws respectively, so that the first left short fiber bundle and the first right short fiber bundle are stretched in the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain the first left short fiber strand and the first right short fiber strand with reduced linear density, or the second left short fiber bundle is stretched in the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the first two pressing and holding continuous conveying jaws, and the second right short fiber bundle is stretched in the middle three pressing and holding continuous conveying jaws and the front three The stretching action of the right middle front stretching zone between the pressing and holding continuous conveying jaws obtains a second left staple fiber strand and a second right staple fiber strand with reduced linear density. At this time, the first left staple fiber bundle located at the rear side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating front lower roller 11 located on the right side at the rear arc point of the diameter maintained horizontally with the first left staple fiber bundle. The first left staple fiber strand located at the front side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rotating front lower roller 11 located on the right side at the front arc point of the diameter maintained horizontally with the first left staple fiber strand. The sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating front lower roller 11 on the left side contacts at the rear arc point of the diameter kept horizontal with the first right short fiber bundle, the first right short fiber strand located in front of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rotating front lower roller 11 on the left side at the front arc point of the diameter kept horizontal with the first right short fiber strand, or the second left short fiber bundle located behind the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating front lower roller 11 on the right side at the rear arc point of the diameter kept horizontal with the second left short fiber bundle, The second left staple fiber strip on the side contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rotating front lower roller 11 on the right side at the front arc point of the diameter kept horizontal with the second left staple fiber strip, the second right staple fiber bundle located at the rear side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rotating front lower roller 11 on the left side at the rear arc point of the diameter kept horizontal with the second right staple fiber bundle, the second right staple fiber strip located at the front side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rotating front lower roller 11 on the left side at the front arc point of the diameter kept horizontal with the second right staple fiber strip, and during the contact process,The rear arc point drives the short fibers in the first left short fiber bundle, the first right short fiber bundle or the second left short fiber bundle, the second right short fiber bundle upward under the friction force, thereby realizing the uniform distribution and arrangement of the short fibers in the short fiber bundle before the drafting in the front drafting zone in the cross section, and then realizing the upper arrangement of the short fiber bundle, and the front arc point drives the short fibers in the first left short fiber strip, the first right short fiber strip or the second left short fiber strip, the second right short fiber strip downward under the friction force, thereby realizing the uniform distribution and arrangement of the short fibers in the short fiber strip obtained by the drafting in the front drafting zone in the cross section, and then realizing the lower arrangement of the short fiber strip.

[0036] For the production of wrapped blended siro yarn, the first short fiber roving pair including the first left short fiber roving 1 and the first right short fiber roving 4 respectively unwound from the two roving tubes are respectively held by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system, while the second short fiber roving pair including the second left short fiber roving 2 and the second right short fiber roving 5 respectively unwound from the two roving tubes are respectively held by the rear second pressing and holding continuous conveying jaws and the rear third pressing and holding continuous conveying jaws to enter the drafting system. The third short-fiber roving pair including the third left short-fiber roving 3 and the third right short-fiber roving 6 respectively unwound from the two roving tubes enters the drafting system. At the same time, the third short-fiber roving pair including the third left short-fiber roving 3 and the third right short-fiber roving 6 respectively unwound from the two roving tubes are gripped by the rear first pressing and holding continuous conveying jaw and the rear fourth pressing and holding continuous conveying jaw respectively and enter the drafting system. At this time, the first left short-fiber roving 1 is successively subjected to the upper finishing effect of the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rear lower roller 7 in contact with it before being gripped, and is subjected to the rear lower roller in contact with it after being gripped. The first right staple roving 4 is sequentially subjected to the upper finishing action of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the rear lower roller 7 in contact with it before being held, and the second left staple roving 2 is sequentially subjected to the upper finishing action of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the rear lower roller 7 in contact with it after being held, and the second left staple roving 2 is sequentially subjected to the upper finishing action of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the rear lower roller 7 in contact with it before being held. The first rotating sleeve 15 is subjected to the upper sorting effect of the sleeve wall surface, and after being grasped, it is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the rear lower roller 7 in contact with it. The second right short fiber roving 5 is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the rear lower roller 7 in contact with it before being grasped, and after being grasped, it is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the rear lower roller 7 in contact with it.

[0037] Then, the first left staple roving 1 and the first right staple roving 4 are gripped and outputted through the left and right sides of the middle pressing and holding continuous conveying jaws respectively, during which the drafting action in the lower rear drafting zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving 2 and the second right staple fiber roving 5 are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, during which the left middle rear drafting zone between the rear second pressing and holding continuous conveying jaws and the rear third pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving 2 and the second right staple fiber roving 5 are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, The stretching action of the right middle rear stretching zone between the jaws and the middle three pressing and holding continuous conveying jaws obtains the second left short fiber bundle and the second right short fiber bundle with reduced linear density. At the same time, the third left short fiber roving 3 and the third right short fiber roving 6 are respectively gripped and output by the middle one pressing and holding continuous conveying jaw and the middle four pressing and holding continuous conveying jaws. During this period, the stretching action in the upper left rear stretching zone between the rear one pressing and holding continuous conveying jaw and the middle one pressing and holding continuous conveying jaw, and the upper right rear stretching zone between the rear four pressing and holding continuous conveying jaws and the middle four pressing and holding continuous conveying jaws obtains the third left short fiber bundle and the third right short fiber bundle with reduced linear density. At this time, the first left The staple roving 1 is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the middle and lower roller 9 in contact with it before being held. The first left staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the middle and lower roller 9 in contact with it. The first right staple fiber strip 4 is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the middle and lower roller 9 in contact with it before being held. The first right staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the middle and lower roller 9 in contact with it. The second left staple rovings 2 are subjected to the upper finishing effect of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the middle lower roller 9 in contact with it before being held, and the second left staple fiber strips obtained by stretching after being held are subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the middle lower roller 9 in contact with it. The second right staple rovings 5 ​​are subjected to the upper finishing effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the middle lower roller 9 in contact with it before being held, and the second right staple fiber strips obtained by stretching after being held are subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the middle lower roller 9 in contact with it.

[0038] Then, the first left staple fiber strip and the first right staple fiber strip are gripped and outputted by the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, during which the stretching action of the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws obtains the first left staple fiber strip and the first right staple fiber strip with reduced linear density, and at the same time, the second left staple fiber strip and the second right staple fiber strip are gripped and outputted by the front two pressing and holding continuous conveying jaws and the front three pressing and holding continuous conveying jaws respectively, during which the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the front two pressing and holding continuous conveying jaws, and the middle three pressing and holding continuous conveying jaws and the front The stretching action of the right middle front stretching zone between the three press-holding continuous conveying jaws obtains the second left staple fiber strip and the second right staple fiber strip with reduced linear density. At the same time, the third left staple fiber strip and the third right staple fiber strip are respectively grasped and output by the previous press-holding continuous conveying jaw and the first four press-holding continuous conveying jaws. During this period, the stretching action of the left upper front stretching zone between the middle first press-holding continuous conveying jaw and the previous press-holding continuous conveying jaw and the right upper front stretching zone between the middle fourth press-holding continuous conveying jaw and the first four press-holding continuous conveying jaws obtains the third left staple fiber strip and the third right staple fiber strip with reduced linear density. At this time, the first left staple fiber strip is Before holding, the first left staple fiber strip obtained by drawing is subjected to the upper sorting effect of the sleeve wall surface of the second rotating sleeve 14 of the left rotating shaft sleeve group of the front bottom roller 11 in contact with it. After holding, the first left staple fiber strip obtained by drawing is subjected to the lower sorting effect of the sleeve wall surface of the second rotating sleeve 14 of the left rotating shaft sleeve group of the front bottom roller 11 in contact with it. Before holding, the first right staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the second rotating sleeve 14 of the right rotating shaft sleeve group of the front bottom roller 11 in contact with it. After holding, the first right staple fiber strip obtained by drawing is subjected to the lower sorting effect of the sleeve wall surface of the second rotating sleeve 14 of the right rotating shaft sleeve group of the front bottom roller 11 in contact with it. Before being grasped, the fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the front lower roller 11 in contact with it. After being grasped, the second left staple fiber strip obtained by stretching is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the front lower roller 11 in contact with it. Before being grasped, the second right staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the front lower roller 11 in contact with it. After being grasped, the second right staple fiber strip obtained by stretching is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the front lower roller 11 in contact with it.

[0039] For the production of pure spun single yarn, the short fiber sliver output by the drafting system is twisted under the action of the twisting twist transmitted from the spinning frame twisting system to obtain the final pure spun single yarn, and the pure spun single yarn is wound on the spun yarn tube 26 in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spun yarn tube 26 to rotate. The rotation of the spun yarn tube 26 then drives the pure spun single yarn to pass through the yarn guide hook 23 and the steel wire ring 24 in turn and be wound on the spun yarn tube 26, so that the steel wire ring 24 rotates around the steel collar 25. At this time, since the pure spun single yarn is a flexible structure and due to the weight of the steel wire ring 24 itself, the winding speed of the pure spun single yarn on the spun yarn tube 26 is less than the rotation speed of the spun yarn tube 26. The speed difference between the two produces twisting twist, and the generated twisting twist is transmitted from bottom to top. When it is transmitted to the twisting point, the short fiber sliver is twisted under the action of the twisting twist to obtain the required pure spun single yarn.

[0040] For the production of pure spun twin yarn, the first left staple fiber strand and the first right staple fiber strand or the second left staple fiber strand and the second right staple fiber strand output by the drafting system are twisted under the action of the twisting twist transmitted by the spinning frame twisting system to obtain pure spun twin yarn, and the pure spun twin yarn is wound on the spinning tube 26 in a clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spinning tube 26 to rotate. The rotation of the spinning tube 26 then drives the pure spun twin yarn to pass through the yarn guide hook 23 and the wire ring 24 in turn and be wound on the spinning tube 26, so that the wire ring 24 is wound around the steel collar. 25 rotates, at this time, due to the flexible structure of the pure spun twin yarn and the weight of the wire ring 24 itself, the winding speed of the pure spun twin yarn on the spun yarn tube 26 is lower than the rotation speed of the spun yarn tube 26, and the speed difference between the two generates a twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to be transmitted separately along the direction of the first left staple fiber strip and the first right staple fiber strip or the second left staple fiber strip and the second right staple fiber strip, so that the first left staple fiber strip or the second left staple fiber strip is twisted under the action of the transmitted first sub-twist to obtain the first left sub-yarn or the second right staple fiber strip. The left sub-yarn makes the first right staple fiber strip or the second right staple fiber strip twisted under the action of the transmitted second sub-twist to obtain the first right sub-yarn or the second right sub-yarn, and the first left sub-yarn and the first right sub-yarn are twisted at the lower twisting point under the action of the transmitted twisting twist to obtain the final first twin yarn, or the second left sub-yarn and the second right sub-yarn are twisted at the lower twisting point under the action of the transmitted twisting twist to obtain the final second twin yarn. At this time, since the spacing between the first left staple fiber strip and the first right staple fiber strip is greater than the spacing between the second left staple fiber strip and the second right staple fiber strip, the first left staple fiber strip is transmitted along the first left staple fiber strip. The first sub-twist handed up is greater than the first sub-twist handed up along the second left staple fiber strip, so that the second sub-twist handed up along the second left staple fiber strip is greater than the second sub-twist handed up along the second right staple fiber strip, and then the twisting twist of the first left sub-yarn and the first right sub-yarn is greater than the twisting twist of the second left sub-yarn and the second right sub-yarn, and at the same time, the winding twist of the first left sub-yarn and the first right sub-yarn in the first twin yarn is less than the winding twist of the second left sub-yarn and the second right sub-yarn in the second twin yarn, and then the layered plying phenomenon in the first twin yarn is less than the layered plying phenomenon in the second twin yarn.

[0041] For the production of wrapped blended siro yarn, the first pair of staple fiber whiskers including the first left staple fiber whiskers and the first right staple fiber whiskers, the second pair of staple fiber whiskers including the second left staple fiber whiskers and the second right staple fiber whiskers, and the third pair of staple fiber whiskers including the third left staple fiber whiskers and the third right staple fiber whiskers output by the drafting system are output in a spatially overlapped state from bottom to top. Under the action of the twisting twist transmitted from the spinning frame twisting system, the first pair of staple fiber whiskers are twisted with each other to form an inner yarn, the second pair of staple fiber whiskers are twisted with each other and simultaneously spatially wrap the first pair of staple fiber whiskers to form a middle yarn, and the third pair of staple fiber whiskers are twisted with each other and simultaneously spatially wrap the first pair of staple fiber whiskers and the second pair of staple fiber whiskers to form an outer yarn, thereby finally twisting to obtain The required wrapped blended yarn is obtained, and the wrapped blended yarn is wound on the spun yarn tube 26 in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spun yarn tube 26 to rotate. The rotation of the spun yarn tube 26 then drives the wrapped blended yarn to pass through the yarn guide hook 23 and the wire ring 24 in turn and wind around the spun yarn tube 26, so that the wire ring 24 rotates around the steel collar 25. At this time, since the wrapped blended yarn is a flexible structure and due to the weight of the wire ring 24 itself, the winding speed of the wrapped blended yarn on the spun yarn tube 26 is lower than the rotation speed of the spun yarn tube 26, and the speed difference between the two generates twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to rotate along the first left short fiber. The directions of the whisker and the first right staple whisker, the second left staple whisker and the second right staple whisker, the third left staple whisker and the third right staple whisker are transmitted separately, so that the first left staple whisker is twisted under the action of the transmitted first left sub-twist to obtain the first left sub-yarn, the first right staple whisker is twisted under the action of the transmitted first right sub-twist to obtain the first right sub-yarn, and at the same time, the first left sub-yarn and the first right sub-yarn are twisted and entangled with each other at the inner lower twisting point to form an inner yarn, the second left staple whisker is twisted under the action of the transmitted second left sub-twist to obtain the second left sub-yarn, the second right staple whisker is twisted under the action of the transmitted second right sub-twist to obtain the second right sub-yarn, and at the same time, the second left sub-yarn and the second right sub-yarn are twisted with each other at the middle and lower twisting point The middle layer yarn is wound, and the second left sub-yarn and the second right sub-yarn are twisted and wound with each other at the middle and lower twisting point, and the inner layer yarn is wrapped in the process, so as to obtain the middle-inner wrapped yarn, wherein the middle and lower twisting point is located in front of and below the inner lower twisting point, the third left staple fiber strands are twisted under the action of the transmitted third left sub-twist to obtain the third left sub-yarn, and the third right staple fiber strands are twisted under the action of the transmitted third right sub-twist to obtain the third right sub-yarn, and at the same time, the third left sub-yarn and the third right sub-yarn are twisted and wound with each other at the outer and lower twisting point to form the outer layer yarn, and the third left sub-yarn and the third right sub-yarn are twisted and wound with each other at the outer and lower twisting point to wrap the middle-inner wrapped yarn, so as to obtain the final wrapped blended yarn, wherein the outer and lower twisting point is located in front of and below the middle and lower twisting point.

[0042] 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 method for producing a wrapped blended yarn, using a production device for a wrapped blended yarn, characterized in that: The production device of the wrapped blended yarn includes a drafting system, which includes three rows of drafting roller pairs, namely, front, middle and rear rows, which are driven separately. The roller shaft of the lower roller of each drafting roller pair is sleeved with a left and a right rotating shaft sleeve group which are arranged axially symmetrically. The left and the right rotating shaft groups include a first rotating shaft sleeve and a second rotating shaft sleeve which are concentrically nested, and one end of the second rotating shaft sleeve extends out of the first rotating shaft sleeve. The rubber roller shaft of the upper rubber roller of each drafting roller pair is sleeved with a left and a right rubber roller sleeve group which are arranged axially symmetrically. The left and the right rubber roller sleeve group includes a first rubber roller sleeve and a second rubber roller sleeve with different diameters. The roller sleeve and the third rubber roller sleeve form corresponding three pressing, holding and feeding jaws for short fiber rovings on the left side on the roller shaft, the first rotating shaft sleeve in the left rotating shaft sleeve group, and the second rotating shaft sleeve, and corresponding three pressing, holding and feeding jaws for short fiber rovings on the right side are formed on the roller shaft, the first rotating shaft sleeve in the right rotating shaft sleeve group, and the second rotating shaft sleeve, and the three pairs of pressing, holding and feeding jaws for short fiber rovings on the left side are symmetrically arranged with the three pairs of pressing, holding and feeding jaws for short fiber rovings on the right side. The pressing and holding feeding jaws of the yarn and the pressing and holding feeding jaws of the short fiber roving on the right are stretched to output the first pair of short fiber whiskers. The second short fiber roving pair is stretched through the pressing and holding feeding jaws of the short fiber roving on the left side formed on the second rotating sleeve and the pressing and holding feeding jaws of the short fiber roving on the right side to output the second pair of short fiber whiskers. The third short fiber roving pair is stretched through the pressing and holding feeding jaws of the short fiber roving on the left side formed on the first rotating sleeve and the pressing and holding feeding jaws of the short fiber roving on the right side to output the third pair of short fiber whiskers. The first pair of short fiber whiskers and the second pair The staple fiber strands and the third pair of staple fiber strands are output to the drafting system in a spatially overlapping state at the bottom, middle and top. Under the action of twisting twist, the first pair of staple fiber strands are twisted with each other to form an inner yarn, the second pair of staple fiber strands are twisted with each other and simultaneously form a middle yarn that spatially wraps the first pair of staple fiber strands, and the third pair of staple fiber strands are twisted with each other and simultaneously form an outer yarn that spatially wraps the first pair of staple fiber strands and the second pair of staple fiber strands, thereby obtaining a directly blended yarn in the spinning process and a wrapped blended yarn in which different fiber components in the blended yarn are arranged in layers.

2. The method for producing a wrapped blended yarn according to claim 1, characterized in that: The first rotating shaft sleeve and the second rotating shaft sleeve are both cylindrical hollow structures with open left and right ends. The materials of the first rotating shaft sleeve and the second rotating shaft sleeve are exactly the same as the material of the roller shaft. The second rotating shaft sleeve is directly sleeved on the roller shaft. The second rotating shaft sleeve and the roller shaft are integrated and fixedly connected. A certain distance is maintained between the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group and the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group. A certain distance is maintained between the left end of the second rotating shaft sleeve of the left rotating shaft sleeve group and the left end of the roller shaft of the spindle position. A certain distance is maintained between the right end of the second rotating shaft sleeve of the right rotating shaft sleeve group and the right end of the roller shaft of the spindle position. The first rotating shaft sleeve is nested on the second rotating shaft sleeve, and the left end of the first rotating shaft sleeve of the left rotating shaft sleeve group is aligned with the left end of the roller shaft of the spindle position. The left rotating shaft sleeve group is located between the left end of the first rotating shaft sleeve and the left end of the second rotating shaft sleeve. The first rotating shaft sleeve is integrally and fixedly connected to the roller shaft, and a certain gap is maintained between the first rotating shaft sleeve and the second rotating shaft sleeve of the left rotating shaft sleeve group, the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group is located on the left side of the right end of the first rotating shaft sleeve and a certain distance is maintained between the two, the right end of the first rotating shaft sleeve of the right rotating shaft sleeve group is aligned with the right end of the roller shaft of the spindle position, and the first rotating shaft sleeve of the right rotating shaft sleeve group is located between the right end of the first rotating shaft sleeve and the right end of the second rotating shaft sleeve and the roller shaft, a certain gap is maintained between the first rotating shaft sleeve and the second rotating shaft sleeve of the right rotating shaft sleeve group, and the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group is located on the right side of the left end of the first rotating shaft sleeve and a certain distance is maintained between the two.

3. The method for producing wrapped blended yarn according to claim 1, characterized in that: The first rubber roller cover, the second rubber roller cover and the middle rubber roller cover are respectively connected to the rubber roller shaft through bearings, so that the first rubber roller cover, the second rubber roller cover and the middle rubber roller cover can rotate freely around the rubber roller shaft independently, the diameter of the first rubber roller cover is smaller than the diameter of the second rubber roller cover, the diameter of the second rubber roller cover is smaller than the diameter of the middle rubber roller cover, the left end of the first rubber roller cover of the left rubber roller cover group is vertically aligned with the left end of the rubber roller shaft, and is vertically aligned with the left end of the first rotating shaft sleeve of the left rotating shaft sleeve group, the right end of the first rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the first rotating shaft sleeve of the left rotating shaft sleeve group, the left end of the second rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the first rotating shaft sleeve of the left rotating shaft sleeve group, and the right end of the second rubber roller cover of the left rubber roller cover group is vertically aligned with the right end of the first rotating shaft sleeve of the left rotating shaft sleeve group. The right end of the first rubber roller sleeve of the right rubber roller sleeve group is vertically aligned with the right end of the rubber roller shaft, and is vertically aligned with the right end of the first rotating shaft sleeve of the right rotating shaft sleeve group. The left end of the first rubber roller sleeve of the right rubber roller sleeve group is vertically aligned with the left end of the first rotating shaft sleeve of the right rotating shaft sleeve group, the right end of the second rubber roller sleeve of the right rubber roller sleeve group is vertically aligned with the left end of the first rotating shaft sleeve of the right rotating shaft sleeve group, the left end of the second rubber roller sleeve of the right rubber roller sleeve group is vertically aligned with the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group, the left end of the middle rubber roller sleeve is vertically aligned with the right end of the second rotating shaft sleeve of the left rotating shaft sleeve group, and the right end of the middle rubber roller sleeve is vertically aligned with the left end of the second rotating shaft sleeve of the right rotating shaft sleeve group.

4. The method for producing wrapped blended yarn according to claim 1, characterized in that: Including pure single yarn production, pure spun siro yarn production, and wrapped blended siro yarn production.

5. The method for producing wrapped blended yarn according to claim 4, characterized in that: In the production of pure single yarn, a short fiber roving unwound from the roving tube is first grasped by the rear middle pressing and holding continuous conveying jaws to enter the drafting system, and then grasped and outputted by the middle pressing and holding continuous conveying jaws, during which time it is stretched by the lower rear stretching zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws to obtain a short fiber bundle with reduced linear density, and the short fiber bundle is then grasped and outputted from the drafting system by the front middle pressing and holding continuous conveying jaws, during which time it is stretched by the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain a short fiber strand with reduced linear density, thereby completing the stretching effect of the fed short fiber roving in the drafting system.

6. The method for producing wrapped blended yarn according to claim 4, characterized in that: In the production of pure spun siro yarn, the first short-fiber roving pair including the first left short-fiber roving and the first right short-fiber roving respectively unwound from the two roving tubes are respectively held by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system, or the second short-fiber roving pair including the second left short-fiber roving and the second right short-fiber roving respectively unwound from the two roving tubes are respectively held by the rear two pressing and holding continuous conveying jaws and the rear three pressing and holding continuous conveying jaws to enter the drafting system. At this time, the first left short-fiber roving located at the rear side of the rear middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller located on the right side at the rear arc point of the diameter kept horizontal with the first left short-fiber roving, and the rear middle pressing and holding continuous conveying jaw is located at the rear arc point of the diameter kept horizontal with the first left short-fiber roving. The first left staple roving on the front side of the continuous conveying jaws for holding and pressing the continuous conveying is in contact with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller on the right side at the front arc point of the diameter kept horizontal with the first left staple roving, the first right staple roving on the rear side of the continuous conveying jaws for holding and pressing the continuous conveying is in contact with the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the rear arc point of the diameter kept horizontal with the first right staple roving, the first right staple roving on the front side of the continuous conveying jaws for holding and pressing the continuous conveying is in contact with the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the front arc point of the diameter kept horizontal with the first right staple roving, or the second rotating shaft sleeve of the continuous conveying jaws for holding and pressing the continuous conveying is in contact with the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the front arc point of the diameter kept horizontal with the first right staple roving, or The second left short fiber roving at the rear side of the jaws contacts the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller on the right side at the rear arc point of the diameter kept horizontal with the second left short fiber roving, the second left short fiber roving located at the front side of the rear two pressing and holding continuous conveying jaws contacts the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating rear lower roller on the right side at the front arc point of the diameter kept horizontal with the second left short fiber roving, the second right short fiber roving located at the rear side of the rear two pressing and holding continuous conveying jaws contacts the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller on the left side at the rear arc point of the diameter kept horizontal with the second right short fiber roving, the second right short fiber roving located at the front side of the rear two pressing and holding continuous conveying jaws The staple roving contacts the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating rear lower roller located on the left side at the front arc point of the diameter kept horizontal with the second right staple roving. During the contact process, the rear arc point produces an upward driving effect on the short fibers in the first left staple roving, the first right staple roving or the second left staple roving, and the second right staple roving under the friction force, thereby achieving uniform distribution and finishing of the short fibers in the staple roving in the cross section, and then achieving the upper finishing of the staple roving. The front arc point produces a downward driving effect on the short fibers in the first left staple roving, the first right staple roving or the second left staple roving, and the second right staple roving under the friction force, thereby achieving uniform distribution and finishing of the short fibers in the staple roving in the cross section.Then the finishing of the short fiber roving is realized; Then, the first left staple fiber roving and the first right staple fiber roving are gripped and outputted through the left and right sides of the middle press-holding continuous conveying jaws respectively, or the second left staple fiber roving and the second right staple fiber roving are gripped and outputted through the middle second press-holding continuous conveying jaws and the middle third press-holding continuous conveying jaws respectively, so that the first left staple fiber roving and the first right staple fiber roving are stretched in the lower rear stretching zone between the rear middle press-holding continuous conveying jaws and the middle press-holding continuous conveying jaws to obtain the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, or the second left staple fiber roving is stretched in the left middle rear stretching zone between the rear second press-holding continuous conveying jaws and the middle second press-holding continuous conveying jaws, and the second right staple fiber roving is stretched in the left middle rear stretching zone between the rear three press-holding continuous conveying jaws and the middle third press-holding continuous conveying jaws. The stretching action of the right middle and rear stretching zone between the conveying jaws obtains a second left short fiber bundle and a second right short fiber bundle with reduced linear density. At this time, the first left short fiber roving located at the rear side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the first left short fiber roving, the first left short fiber bundle located at the front side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side at the front arc point of the diameter maintained horizontally with the first left short fiber bundle, the first right short fiber roving located at the rear side of the middle pressing and holding continuous conveying jaw contacts the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the left side The sleeve wall surface of the second rotating sleeve contacts at the rear arc point of the diameter maintained horizontally with the first right short fiber roving, the first right short fiber bundle located at the front side of the middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating middle and lower roller located on the left side at the front arc point of the diameter maintained horizontally with the first right short fiber bundle, or the second left short fiber roving located at the rear side of the middle second pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rotating middle and lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the second left short fiber roving, the second left short fiber bundle located at the front side of the middle second pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating middle and lower roller located on the right side The surface contacts at a front arc point of a diameter that is horizontal with the second left short fiber bundle, the second right short fiber roving located at the rear side of the middle second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating middle lower roller located on the left side at a rear arc point of a diameter that is horizontal with the second right short fiber roving, the second right short fiber bundle located at the front side of the middle second pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating middle lower roller located on the left side at a front arc point of a diameter that is horizontal with the second right short fiber bundle, during the contact process, the rear arc point produces an upward driving effect on the short fibers in the first left short fiber roving, the first right short fiber roving or the second left short fiber roving, and the second right short fiber roving under the action of friction,Thereby, the short fibers in the short fiber roving before the drafting in the rear drafting zone are evenly distributed and arranged in the cross section, and then the upper arrangement of the short fiber roving is achieved. The front arc point drives the short fibers in the first left short fiber bundle, the first right short fiber bundle or the second left short fiber bundle, the second right short fiber bundle downward under the friction force, thereby achieving the even distribution and arrangement of the short fibers in the short fiber bundle obtained by the drafting in the rear drafting zone in the cross section, and then the lower arrangement of the short fiber bundle is achieved;, Then, the first left short fiber bundle and the first right short fiber bundle are gripped and outputted through the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, or the second left short fiber bundle and the second right short fiber bundle are gripped and outputted through the first two pressing and holding continuous conveying jaws and the first three pressing and holding continuous conveying jaws respectively, so that the first left short fiber bundle and the first right short fiber bundle are stretched in the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws to obtain the first left short fiber strand and the first right short fiber strand with reduced linear density, or the second left short fiber bundle is stretched in the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the first two pressing and holding continuous conveying jaws, and the second right short fiber bundle is stretched in the middle three pressing and holding continuous conveying jaws and the first three pressing and holding continuous conveying jaws. The stretching action of the right middle front stretching zone between the conveying jaws obtains a second left staple fiber strand and a second right staple fiber strand with reduced linear density. At this time, the first left staple fiber bundle located at the rear side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side at the rear arc point of the diameter maintained horizontally with the first left staple fiber bundle. The first left staple fiber strand located at the front side of the front middle pressing and holding continuous conveying jaw contacts with the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side at the front arc point of the diameter maintained horizontally with the first left staple fiber strand. The sleeve wall surfaces of the two rotating sleeves are in contact at the rear arc point of the diameter maintained horizontally with the first right short fiber bundle, the first right short fiber strand located at the front side of the front middle pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating front bottom roller located on the left side at the front arc point of the diameter maintained horizontally with the first right short fiber strand, or the second left short fiber bundle located at the rear side of the first two pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating front bottom roller located on the right side at the rear arc point of the diameter maintained horizontally with the second left short fiber bundle, the second left short fiber strand located at the front side of the first two pressing and holding continuous conveying jaws is in contact with the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rotating front bottom roller located on the right side The surface contacts at a front arc point of a diameter that is horizontal with the second left staple fiber strand, the second right staple fiber bundle located at the rear side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side at a rear arc point of a diameter that is horizontal with the second right staple fiber bundle, the second right staple fiber strand located at the front side of the first two pressing and holding continuous conveying jaws contacts with the sleeve wall surface of the first rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side at a front arc point of a diameter that is horizontal with the second right staple fiber strand, during the contact process, the rear arc point produces an upward driving effect on the short fibers in the first left staple fiber bundle, the first right staple fiber bundle or the second left staple fiber bundle, and the second right staple fiber bundle under the action of friction,Thus, the short fibers in the short fiber bundle before the drafting in the front drafting zone are evenly distributed and arranged in the cross section, and then the short fiber bundle is arranged upward. The front arc point drives the short fibers in the first left short fiber strand, the first right short fiber strand or the second left short fiber strand, and the second right short fiber strand downward under the friction force, thereby achieving the even distribution and arrangement of the short fibers in the short fiber strands obtained by the drafting in the front drafting zone in the cross section, and then the short fiber strands are arranged downward.

7. The method for producing wrapped blended yarn according to claim 4, characterized in that: In the production of wrapped blended siro yarn, the first short fiber roving pair including the first left short fiber roving and the first right short fiber roving unwound from the two roving tubes are respectively held by the left and right sides of the rear middle pressing and holding continuous conveying jaws to enter the drafting system, while the second short fiber roving pair including the second left short fiber roving and the second right short fiber roving unwound from the two roving tubes are respectively held by the rear two pressing and holding continuous conveying jaws and the rear three pressing and holding continuous conveying jaws to enter the drafting system, while the third short fiber roving pair including the third left short fiber roving and the third right short fiber roving unwound from the two roving tubes are respectively held by the rear one pressing and holding continuous conveying jaws and the rear four pressing and holding continuous conveying jaws to enter the drafting system, at this time, the first left short fiber roving is successively subjected to the upper finishing effect of the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the rear lower roller in contact with it before being held, and is subjected to the upper finishing effect of the sleeve wall surface of the second rotating shaft sleeve group of the rear lower roller in contact with it after being held. The first right staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it before being held, and the lower finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it after being held. The second left staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rear bottom roller in contact with it before being held, and the lower finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the rear bottom roller in contact with it after being held. The second right staple roving is successively subjected to the upper finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it before being held, and the lower finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the rear bottom roller in contact with it after being held. Then, the first left staple roving and the first right staple roving are gripped and outputted through the left and right sides of the middle pressing and holding continuous conveying jaws respectively, during which the drafting action in the lower rear drafting zone between the rear middle pressing and holding continuous conveying jaws and the middle pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving and the second right staple roving are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, during which the left middle rear drafting zone between the rear second pressing and holding continuous conveying jaws and the rear third pressing and holding continuous conveying jaws obtains the first left staple fiber bundle and the first right staple fiber bundle with reduced linear density, and at the same time, the second left staple roving and the second right staple fiber roving are gripped and outputted through the middle second pressing and holding continuous conveying jaws and the middle third pressing and holding continuous conveying jaws respectively, The stretching action of the right middle rear stretching zone between the continuous conveying jaw and the middle three pressing and holding continuous conveying jaws obtains the second left short fiber bundle and the second right short fiber bundle with reduced linear density. At the same time, the third left short fiber roving and the third right short fiber roving are respectively gripped and output by the middle one pressing and holding continuous conveying jaw and the middle four pressing and holding continuous conveying jaw. During this period, the stretching action in the upper left rear stretching zone between the rear one pressing and holding continuous conveying jaw and the middle one pressing and holding continuous conveying jaw, and the upper right rear stretching zone between the rear four pressing and holding continuous conveying jaws and the middle four pressing and holding continuous conveying jaws obtains the third left short fiber bundle and the third right short fiber bundle with reduced linear density. Right short fiber bundle, at this time, the first left short fiber roving is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve of the left rotating shaft sleeve group of the middle lower roller in contact with it before being held, and the first left short fiber strip obtained by drawing after holding is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve of the left rotating shaft sleeve group of the middle lower roller in contact with it, and the first right short fiber roving is subjected to the upper finishing effect of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the middle lower roller in contact with it before being held, and the first right short fiber strip obtained by drawing after holding is subjected to the lower finishing effect of the sleeve wall surface of the second rotating sleeve of the right rotating shaft sleeve group of the middle lower roller in contact with it. The second left staple roving is subjected to the upper finishing effect of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the middle lower roller in contact with it before being held, and the second left staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the middle lower roller in contact with it, and the second right staple fiber strip obtained by drawing after being held is subjected to the lower finishing effect of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the middle lower roller in contact with it; Then, the first left staple fiber strip and the first right staple fiber strip are gripped and outputted by the left and right sides of the front middle pressing and holding continuous conveying jaws respectively, during which the first left staple fiber strip and the first right staple fiber strip with reduced linear density are obtained by the stretching action of the lower front stretching zone between the middle pressing and holding continuous conveying jaws and the front middle pressing and holding continuous conveying jaws, and at the same time, the second left staple fiber strip and the second right staple fiber strip are gripped and outputted by the front two pressing and holding continuous conveying jaws and the front three pressing and holding continuous conveying jaws respectively, during which the left middle front stretching zone between the middle two pressing and holding continuous conveying jaws and the front two pressing and holding continuous conveying jaws and the middle three pressing and holding continuous conveying jaws are used to stretch the fiber strips. The stretching action of the right middle front stretching zone between the continuous conveying jaw and the first three pressing and holding continuous conveying jaws obtains the second left staple fiber strip and the second right staple fiber strip with reduced linear density. At the same time, the third left staple fiber strip and the third right staple fiber strip are respectively grasped and output by the previous pressing and holding continuous conveying jaw and the first four pressing and holding continuous conveying jaws. During this period, the stretching action in the left upper front stretching zone between the middle pressing and holding continuous conveying jaw and the previous pressing and holding continuous conveying jaw, and the right upper front stretching zone between the middle four pressing and holding continuous conveying jaws and the first four pressing and holding continuous conveying jaws obtains the third left staple fiber strip and the third right staple fiber strip with reduced linear density. Right staple fiber strip, at this time, the first left staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the front bottom roller in contact with it before being grasped, and the first left staple fiber strip obtained by stretching after grasping is subjected to the lower sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the left rotating shaft sleeve group of the front bottom roller in contact with it, and the first right staple fiber strip obtained by stretching after grasping is subjected to the lower sorting effect of the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the front bottom roller in contact with it. The second left staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the front lower roller in contact with it before being held, and the second left staple fiber strip obtained by stretching after holding is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve of the left rotating shaft sleeve group of the front lower roller in contact with it. The second right staple fiber strip is subjected to the upper sorting effect of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the front lower roller in contact with it before being held, and the second right staple fiber strip obtained by stretching after holding is subjected to the lower sorting effect of the sleeve wall surface of the first rotating sleeve of the right rotating shaft sleeve group of the front lower roller in contact with it.

8. The method for producing wrapped blended yarn according to claim 5, characterized in that: In the production of pure spun single yarn, the short fiber slivers output by the drafting system are twisted under the action of the twisting twist transmitted from the spinning frame twisting system to obtain the final pure spun single yarn, and the pure spun single yarn is wound on the spinning tube in a clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spinning tube to rotate. The rotation of the spinning tube then drives the pure spun single yarn to pass through the yarn guide hook and the wire ring in turn and wind around the spinning tube, so that the wire ring rotates around the steel collar. At this time, due to the flexible structure of the pure spun single yarn and the weight of the wire ring itself, the winding speed of the pure spun single yarn on the spinning tube is less than the rotation speed of the spinning tube. The speed difference between the two produces twisting twist, and the generated twisting twist is transmitted from bottom to top. When it is transmitted to the twisting point, the short fiber slivers are twisted under the action of the twisting twist to obtain the required pure spun single yarn.

9. The method for producing wrapped blended yarn according to claim 6, characterized in that: In the production of pure spun twin yarn, the first left staple fiber strand and the first right staple fiber strand or the second left staple fiber strand and the second right staple fiber strand output by the drafting system are twisted under the action of the twisting twist transmitted by the twisting system of the spinning frame to obtain pure spun twin yarn, and the pure spun twin yarn is wound on the spinning tube in a clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spinning tube to rotate. The rotation of the spinning tube then drives the pure spun twin yarn to pass through the yarn guide hook and the wire ring in turn and wind around the spinning tube, so that the wire ring rotates around the steel collar. At this time, due to the pure spun twin yarn The winding yarn is a flexible structure and due to the weight of the wire ring itself, the winding speed of the pure spun twin yarn on the spun yarn tube is lower than the rotation speed of the spun yarn tube. The speed difference between the two generates twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to be transmitted separately along the direction of the first left staple fiber whisker and the first right staple fiber whisker or the second left staple fiber whisker and the second right staple fiber whisker, so that the first left staple fiber whisker or the second left staple fiber whisker is twisted under the action of the transmitted first sub-twist to obtain the first left sub-yarn or the second left sub-yarn, so that the first right staple fiber whisker The first right sub-yarn or the second right sub-yarn is twisted under the action of the second sub-twist transmitted to obtain the first right sub-yarn or the second right sub-yarn, the first left sub-yarn and the first right sub-yarn are twisted at the lower twisting point under the action of the twisting twist transmitted to obtain the final first twin yarn, or the second left sub-yarn and the second right sub-yarn are twisted at the lower twisting point under the action of the twisting twist transmitted to obtain the final second twin yarn, at this time, since the spacing between the first left staple fiber strip and the first right staple fiber strip is greater than the spacing between the second left staple fiber strip and the second right staple fiber strip, the first left staple fiber strip transmitted along the first left staple fiber strip is The sub-twist is greater than the first sub-twist transmitted along the second left staple fiber strip, so that the second sub-twist transmitted along the second left staple fiber strip is greater than the second sub-twist transmitted along the second right staple fiber strip, and then the twisting twist of the first left sub-yarn and the first right sub-yarn is greater than the twisting twist of the second left sub-yarn and the second right sub-yarn, and at the same time, the winding twist of the first left sub-yarn and the first right sub-yarn in the first twin yarn is less than the winding twist of the second left sub-yarn and the second right sub-yarn in the second twin yarn, and then the layered plying phenomenon in the first twin yarn is less than the layered plying phenomenon in the second twin yarn.

10. The method for producing wrapped blended yarn according to claim 7, characterized in that: In the production of wrapped blended siro yarn, the first pair of staple fiber whiskers including the first left staple fiber whiskers and the first right staple fiber whiskers, the second pair of staple fiber whiskers including the second left staple fiber whiskers and the second right staple fiber whiskers, and the third pair of staple fiber whiskers including the third left staple fiber whiskers and the third right staple fiber whiskers output by the drafting system are output in a spatially overlapped state at the bottom, the middle and the top. Under the action of the twisting twist transmitted by the spinning frame twisting system, the first pair of staple fiber whiskers are twisted with each other to form an inner yarn, the second pair of staple fiber whiskers are twisted with each other and simultaneously form a middle yarn that spatially wraps the first pair of staple fiber whiskers, and the third pair of staple fiber whiskers are twisted with each other and simultaneously form an outer yarn that spatially wraps the first pair of staple fiber whiskers and the second pair of staple fiber whiskers, thereby Finally, the desired wrapped blended yarn is twisted, and the wrapped blended yarn is wound on the spun yarn tube in a clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spun yarn tube to rotate. The rotation of the spun yarn tube drives the wrapped blended yarn to pass through the yarn guide hook and the wire ring in turn and wind around the spun yarn tube, so that the wire ring rotates around the steel collar. At this time, due to the flexible structure of the wrapped blended yarn and the weight of the wire ring itself, the winding speed of the wrapped blended yarn on the spun yarn tube is lower than the rotation speed of the spun yarn tube. The speed difference between the two produces twisting twist, which is transmitted from bottom to top. When it is transmitted to the lower twisting point, it continues to rotate along the first left short fiber whisker and the first right short fiber whisker, The directions of the second left staple fiber strands and the second right staple fiber strands, the third left staple fiber strands and the third right staple fiber strands are transmitted separately, so that the first left staple fiber strands are twisted under the action of the transmitted first left sub-twist to obtain the first left sub-yarn, and the first right staple fiber strands are twisted under the action of the transmitted first right sub-twist to obtain the first right sub-yarn, and at the same time, the first left sub-yarn and the first right sub-yarn are twisted and entangled with each other at the inner lower twisting point to form an inner layer yarn, the second left staple fiber strands are twisted under the action of the transmitted second left sub-twist to obtain the second left sub-yarn, and the second right staple fiber strands are twisted under the action of the transmitted second right sub-twist to obtain the second right sub-yarn, and at the same time, the second left sub-yarn and the second right sub-yarn are twisted and entangled with each other at the middle lower twisting point to form a middle layer The second left sub-yarn and the second right sub-yarn are twisted and entangled with each other at the middle and lower twisting point, and the inner layer yarn is wrapped around the second left sub-yarn to obtain the middle-inner wrapped yarn, wherein the middle and lower twisting point is located in front of and below the inner lower twisting point; the third left staple fiber strands are twisted under the action of the transmitted third left sub-twist to obtain the third left sub-yarn, and the third right staple fiber strands are twisted under the action of the transmitted third right sub-twist to obtain the third right sub-yarn; at the same time, the third left sub-yarn and the third right sub-yarn are twisted and entangled with each other at the outer and lower twisting point to form the outer layer yarn; and the third left sub-yarn and the third right sub-yarn are twisted and entangled with each other at the outer and lower twisting point to wrap the middle and inner wrapped yarn to obtain the final wrapped blended yarn, wherein the outer and lower twisting point is located in front of and below the middle and lower twisting point.

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