A method of producing a wrapped blended yarn

Abstract

The application discloses a spinning method of wrapped blended yarn, which adopts three rows of stretching rollers driven separately, and the roller shaft of the lower roller is sleeved with left and right rotating shaft sleeve groups arranged in axial symmetry; the glue roller shaft of the glue roller is sleeved with left and right glue roller sleeve groups arranged in axial symmetry; three pairs of press-holding feeding jaws of staple roving are formed on the first rotating shaft sleeve and the second rotating shaft sleeve in the left and right rotating shaft sleeve groups and the roller shaft, and the jaws are left-right symmetrical; the first pair of staple sliver output by pressing and stretching on the roller shaft, the second pair of staple sliver output by pressing and stretching on the second rotating shaft sleeve and the third pair of staple sliver output by pressing and stretching on the first rotating shaft sleeve are output in the spatial superposition state from below, middle and above, the required wrapped blended yarn is produced, direct blending in the spinning process is realized, the different fiber components in the blended yarn are arranged in layers, the blending efficiency is improved and different blending purposes are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new spinning technology, in particular to a production method of wrapped blended yarn. BACKGROUND

[0002] With the continuous advancement of the times, people's requirements for clothing fabrics are constantly improving, and the textile and garment industry is currently in an era of pursuing fashion, diversification and high quality. Therefore, new requirements have been put forward for the development of textile raw materials, among which fancy yarns have gradually entered people's field of vision and occupy an irreplaceable position. Fancy yarn refers to a yarn with special structure and appearance effect obtained by processing fibers or yarns with special raw materials, special equipment or special process during spinning and making. It is a kind of yarn with decorative effect in yarn products. Fancy yarn has unique structure, flexible modeling, rich color performance, diversified use of raw materials, and creativity, which makes fancy yarn products easy to update and produce more differentiated textile products. In today's era of pursuing individualized consumption, the market gives fancy yarn a broad space. Drafting is the most important link in spinning. During drafting, fibers are gradually drawn out from the surrounding fiber group one by one, and due to mutual friction, the hook gradually disappears and the curl gradually straightens. In this way, the transverse connection remaining in each fiber can be completely eliminated, creating conditions for firmly establishing regular head-to-tail connection. Therefore, effective control of fibers during drafting is an important condition for achieving excellent drafting effect. SUMMARY

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

[0004] The application provides a production method of wrapped blended yarn and a production device of wrapped blended yarn, the production device of wrapped blended yarn comprises a drafting system, the drafting system comprises three rows of separately driven front, middle and rear drafting roller pairs, a left and right rotating shaft sleeve group arranged in axial symmetry is sleeved on the roller shaft of the lower roller of each drafting roller pair, the left and right rotating shaft group comprises 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, a left and right rubber roller sleeve group arranged in axial symmetry is sleeved on the rubber roller shaft of the upper rubber roller of each drafting roller pair, the left and right rubber roller sleeve group comprises first, second and third rubber roller sleeves with different diameters, three left-side pressing and holding feeding jaws of staple fiber rovings are formed on the roller shaft, the first rotating shaft sleeve and the second rotating shaft sleeve in the left rotating shaft sleeve group, three right-side pressing and holding feeding jaws of staple fiber rovings are formed on the roller shaft, the first rotating shaft sleeve and the second rotating shaft sleeve in the right rotating shaft sleeve group, and the three pairs of left-side pressing and holding feeding jaws of staple fiber rovings and the three pairs of right-side pressing and holding feeding jaws of staple fiber rovings are arranged in symmetry, the first pair of staple fiber rovings is output after being drafted through the left-side pressing and holding feeding jaws of staple fiber rovings and the right-side pressing and holding feeding jaws of staple fiber rovings formed on the roller shaft, the second pair of staple fiber rovings is output after being drafted through the left-side pressing and holding feeding jaws of staple fiber rovings and the right-side pressing and holding feeding jaws of staple fiber rovings formed on the second rotating shaft sleeve, the third pair of staple fiber rovings is output after being drafted through the left-side pressing and holding feeding jaws of staple fiber rovings and the right-side pressing and holding feeding jaws of staple fiber rovings formed on the first rotating shaft sleeve, and the first, second and third pairs of staple fiber rovings are output in a spatial superposition state of lower, middle and upper layers in the drafting system, under the action of the twisting degree, the mutual twisting between the first pair of staple fiber rovings forms an inner layer yarn, the mutual twisting between the second pair of staple fiber rovings and the spatial wrapping of the first pair of staple fiber rovings forms a middle layer yarn, and the mutual twisting between the third pair of staple fiber rovings and the spatial wrapping of the first and second pairs of staple fiber rovings form an outer layer yarn, the wrapped blended yarn which is directly blended in the spinning process and makes the different fiber components in the blended yarn arranged in layers is prepared.

[0005] The production method of the wrapped blended yarn as described above, preferably, the first rotating shaft sleeve and the second rotating shaft sleeve are both cylindrical hollow structures with open left and right ends, the material of the first rotating shaft sleeve and the second rotating shaft sleeve is completely the same as that 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 integrally fixedly connected, a certain interval is kept 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 interval is kept 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 interval is kept 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, 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 first rotating shaft sleeve between the left end of the first rotating shaft sleeve and the left end of the second rotating shaft sleeve of the left rotating shaft sleeve group is integrally fixedly connected with the roller shaft, a certain gap is kept between the first rotating shaft sleeve and the second rotating shaft sleeve of the left rotating shaft sleeve group between the right end of the second rotating shaft sleeve and the right end of the first rotating shaft sleeve, 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 interval is kept 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, the first rotating shaft sleeve between the right end of the first rotating shaft sleeve and the right end of the second rotating shaft sleeve of the right rotating shaft sleeve group is integrally fixedly connected with the roller shaft, a certain gap is kept 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, 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 interval is kept between the two.

[0006] The production method of the wrapped blended yarn as described above, wherein preferably, the first rubber roller sleeve, the second rubber roller sleeve and the middle rubber roller sleeve are respectively connected between the bearing and the rubber roller shaft, so that the first rubber roller sleeve, the second rubber roller sleeve and the middle rubber roller sleeve can independently rotate around the rubber roller shaft, the diameter of the first rubber roller sleeve is smaller than the diameter of the second rubber roller sleeve, the diameter of the second rubber roller sleeve is smaller than the diameter of the middle rubber roller sleeve, the left end of the first rubber roller sleeve of the left rubber roller sleeve group is vertically aligned with the left end of the rubber roller shaft and the left 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 left rubber roller sleeve 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 sleeve of the left rubber roller sleeve 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 sleeve of the left rubber roller sleeve 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 sleeve of the right rubber roller sleeve group is vertically aligned with the right end of the rubber roller shaft and 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.

[0007] The production method of the wrapped blended yarn as described above, wherein preferably, the method comprises pure spinning single yarn production, pure spinning siro yarn production and wrapped blended siro yarn production.

[0008] The production method of the wrapped blended yarn as described above, wherein preferably, in the pure spinning single yarn production, a short fiber roving unwound from a roving tube is first held by the rear middle pressing and continuous conveying jaw and then output, during which the short fiber roving is subjected to the drafting action of the lower rear drafting zone between the rear middle pressing and continuous conveying jaw and the middle pressing and continuous conveying jaw to obtain a short fiber bundle with reduced linear density, and then the short fiber bundle is held by the front middle pressing and continuous conveying jaw and output from the drafting system, during which the short fiber bundle is subjected to the drafting action of the lower front drafting zone between the middle pressing and continuous conveying jaw and the front middle pressing and continuous conveying jaw to obtain a short fiber sliver with reduced linear density, so as to complete the drafting action of the fed short fiber roving in the drafting system.

[0009] A production method of a wrapped blended yarn as described above, wherein, preferably, in the production of a pure spun siro yarn, a first pair of left and right short fiber rovings unwound from two respective roving cans are held by the left and right sides of the middle pressing continuous conveying nip and then enter the drafting system, or a second pair of left and right short fiber rovings unwound from two respective roving cans are held by the second and third pressing continuous conveying nips and then enter the drafting system, at this time, the sleeve wall surface of the second rotating sleeve of the left rotating sleeve set of the right rotating back roller contacts the first left short fiber roving at a rear arc point of the diameter that remains horizontal with the first left short fiber roving, the sleeve wall surface of the second rotating sleeve of the left rotating sleeve set of the right rotating back roller contacts the first left short fiber roving at a front arc point of the diameter that remains horizontal with the first left short fiber roving, the sleeve wall surface of the second rotating sleeve of the right rotating sleeve set of the left rotating back roller contacts the first right short fiber roving at a rear arc point of the diameter that remains horizontal with the first right short fiber roving, the sleeve wall surface of the second rotating sleeve of the right rotating sleeve set of the left rotating back roller contacts the first right short fiber roving at a front arc point of the diameter that remains horizontal with the first right short fiber roving, or the sleeve wall surface of the first rotating sleeve of the left rotating sleeve set of the right rotating back roller contacts the second left short fiber roving at a rear arc point of the diameter that remains horizontal with the second left short fiber roving, the sleeve wall surface of the first rotating sleeve of the left rotating sleeve set of the right rotating back roller contacts the second left short fiber roving at a front arc point of the diameter that remains horizontal with the second left short fiber roving, the sleeve wall surface of the first rotating sleeve of the right rotating sleeve set of the left rotating back roller contacts the second right short fiber roving at a rear arc point of the diameter that remains horizontal with the second right short fiber roving, the sleeve wall surface of the first rotating sleeve of the right rotating sleeve set of the left rotating back roller contacts the second right short fiber roving at a front arc point of the diameter that remains horizontal with the second right short fiber roving, in the process of contact, 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, the second right short fiber roving under the frictional force, thereby achieving uniform distribution and arrangement of the short fibers in the cross section of the short fiber roving, and then achieving the upper arrangement of the short fiber roving, the front arc point produces a downward 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, the second right short fiber roving under the frictional force,Thus, the uniform distribution of the short fibers in the cross section of the short fiber roving is achieved, and then the subsequent arrangement of the short fiber roving is achieved.

[0010] And then the first left short fiber roving and the first right short fiber roving are respectively held and outputted by the left side and the right side of the middle pressing holding continuous conveying nipper, or the second left short fiber roving and the second right short fiber roving are respectively held and outputted by the middle two pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, so that the first left short fiber roving and the first right short fiber roving are stretched by the stretching effect of the lower rear stretching zone between the rear middle pressing holding continuous conveying nipper and the middle pressing holding continuous conveying nipper to obtain the first left short fiber bundle and the first right short fiber bundle with reduced linear density, or the second left short fiber roving is stretched by the stretching effect of the left middle rear stretching zone between the rear two pressing holding continuous conveying nipper and the middle two pressing holding continuous conveying nipper, and the second right short fiber roving is stretched by the stretching effect of the right middle rear stretching zone between the rear three pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper to obtain the second left short fiber bundle and the second right short fiber bundle with reduced linear density, at this time, the sleeve wall surface of the second rotating sleeve of the left rotating sleeve group of the rotating middle lower roller on the right side is in contact with the first left short fiber roving at the rear arc point of the diameter which keeps horizontal with the first left short fiber roving, the sleeve wall surface of the second rotating sleeve of the left rotating sleeve group of the rotating middle lower roller on the right side is in contact with the first left short fiber bundle at the front arc point of the diameter which keeps horizontal with the first left short fiber bundle, the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating middle lower roller on the left side is in contact with the first right short fiber roving at the rear arc point of the diameter which keeps horizontal with the first right short fiber roving, the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rotating middle lower roller on the left side is in contact with the first right short fiber bundle at the front arc point of the diameter which keeps horizontal with the first right short fiber bundle, or the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rotating middle lower roller on the right side is in contact with the second left short fiber roving at the rear arc point of the diameter which keeps horizontal with the second left short fiber roving, the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rotating middle lower roller on the right side is in contact with the second left short fiber bundle at the front arc point of the diameter which keeps horizontal with the second left short fiber bundle, the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the rotating middle lower roller on the left side is in contact with the second right short fiber roving at the rear arc point of the diameter which keeps horizontal with the second right short fiber roving, the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the rotating middle lower roller on the left side is in contact with the second right short fiber bundle at the front arc point of the diameter which keeps horizontal with the second right short fiber bundle, in the process of contact, the short fibers in the first left short fiber roving, the first right short fiber roving, the second left short fiber roving or the second right short fiber roving are driven upward by the friction force of the rear arc point,Thus, the short fibers in the short fiber roving before drafting in the rear drafting zone are arranged uniformly in the cross section, and then the short fiber roving is arranged, 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 are driven downward by the friction force at the front arc point, thus, the short fibers in the short fiber bundle drafted in the rear drafting zone are arranged uniformly in the cross section, and then the short fiber bundle is arranged,

[0011] And then the first left short fiber bundle and the first right short fiber bundle are respectively held and output by the left side and the right side of the front middle pressing holding continuous conveying jaw, or the second left short fiber bundle and the second right short fiber bundle are respectively held and output by the front two pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw, so that the first left short fiber bundle and the first right short fiber bundle are stretched in the front lower stretching area between the middle pressing holding continuous conveying jaw and the front middle pressing holding continuous conveying jaw to obtain the first left short fiber sliver and the first right short fiber sliver with reduced linear density, or the second left short fiber bundle is stretched in the left middle front stretching area between the middle two pressing holding continuous conveying jaw and the front two pressing holding continuous conveying jaw, and the second right short fiber bundle is stretched in the right middle front stretching area between the middle three pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw to obtain the second left short fiber sliver and the second right short fiber sliver with reduced linear density, at this time, 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 is in contact with the first left short fiber bundle at the rear arc point maintaining the horizontal diameter of the first left short fiber bundle, 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 is in contact with the first left short fiber sliver at the front arc point maintaining the horizontal diameter of the first left short fiber sliver, the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side is in contact with the first right short fiber bundle at the rear arc point maintaining the horizontal diameter of the first right short fiber bundle, the sleeve wall surface of the second rotating shaft sleeve of the right rotating shaft sleeve group of the rotating front lower roller located on the left side is in contact with the first right short fiber sliver at the front arc point maintaining the horizontal diameter of the first right short fiber sliver, or the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side is in contact with the second left short fiber bundle at the rear arc point maintaining the horizontal diameter of the second left short fiber bundle, the sleeve wall surface of the first rotating shaft sleeve of the left rotating shaft sleeve group of the rotating front lower roller located on the right side is in contact with the second left short fiber sliver at the front arc point maintaining the horizontal diameter of the second left short fiber sliver, 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 is in contact with the second right short fiber bundle at the rear arc point maintaining the horizontal diameter of the second right short fiber bundle, and 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 is in contact with the second right short fiber sliver at the front arc point maintaining the horizontal diameter of the second right short fiber sliver, in the process of contact, 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 and the second right short fiber bundle upward under the friction force,Thus, the uniform distribution of the short fibers in the cross section of the short fiber bundle before drafting in the front drafting zone is achieved, and then the upper arrangement of the short fiber bundle is achieved. The downward driving effect of the short fibers in the first left short fiber sliver, the first right short fiber sliver, or the second left short fiber sliver, the second right short fiber sliver under the friction force is achieved, so that the uniform distribution of the short fibers in the cross section of the short fiber sliver obtained by drafting in the front drafting zone is achieved, and then the lower arrangement of the short fiber sliver is achieved.

[0012] The production method of the wrapped blended yarn as described above, wherein, preferably, in the production of the wrapped blended siro yarn, the first pair of short fiber rovings including the first left short fiber roving and the first right short fiber roving unwound from the two roving cans respectively are held by the left side and the right side of the rear middle pressing continuous conveying nip respectively and enter the drafting system, at the same time, the second pair of short fiber rovings including the second left short fiber roving and the second right short fiber roving unwound from the two roving cans respectively are held by the rear second pressing continuous conveying nip and the rear third pressing continuous conveying nip respectively and enter the drafting system, at the same time, the third pair of short fiber rovings including the third left short fiber roving and the third right short fiber roving unwound from the two roving cans respectively are held by the rear first pressing continuous conveying nip and the rear fourth pressing continuous conveying nip respectively and enter the drafting system, at this time, the first left short fiber roving is subjected to the upper arrangement of the sleeve wall surface of the second rotating sleeve of the left rotating sleeve group of the rear lower roller before being held and the lower arrangement of the sleeve wall surface of the second rotating sleeve of the left rotating sleeve group of the rear lower roller after being held in turn, the first right short fiber roving is subjected to the upper arrangement of the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rear lower roller before being held and the lower arrangement of the sleeve wall surface of the second rotating sleeve of the right rotating sleeve group of the rear lower roller after being held in turn, the second left short fiber roving is subjected to the upper arrangement of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rear lower roller before being held and the lower arrangement of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve group of the rear lower roller after being held in turn, and the second right short fiber roving is subjected to the upper arrangement of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the rear lower roller before being held and the lower arrangement of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve group of the rear lower roller after being held in turn.

[0013] The first left short fiber roving and the first right short fiber roving are respectively held and output by the left side and the right side of the middle pressing holding continuous conveying nipper, and the first left short fiber bundle and the first right short fiber bundle with reduced linear density are obtained under the drafting action of the lower rear drafting zone between the rear middle pressing holding continuous conveying nipper and the middle pressing holding continuous conveying nipper, while the second left short fiber roving and the second right short fiber roving are respectively held and output by the middle two pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, and the second left short fiber bundle and the second right short fiber bundle with reduced linear density are obtained under the drafting action of the left middle rear drafting zone between the rear two pressing holding continuous conveying nipper and the middle two pressing holding continuous conveying nipper and the right middle rear drafting zone between the rear three pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, while the third left short fiber roving and the third right short fiber roving are respectively held and output by the middle one pressing holding continuous conveying nipper and the middle four pressing holding continuous conveying nipper, and the third left short fiber bundle and the third right short fiber bundle with reduced linear density are obtained under the drafting action of the left upper rear drafting zone between the rear one pressing holding continuous conveying nipper and the middle one pressing holding continuous conveying nipper and the right upper rear drafting zone between the rear four pressing holding continuous conveying nipper and the middle four pressing holding continuous conveying nipper.

[0014] The first left short fiber strip and the first right short fiber strip are respectively held and output by the left side and the right side of the front middle pressing holding continuous conveying jaw, and the first left short fiber web and the first right short fiber web with reduced linear density are obtained through the drafting action of the lower front drafting zone between the middle pressing holding continuous conveying jaw and the front middle pressing holding continuous conveying jaw, while the second left short fiber strip and the second right short fiber strip are respectively held and output by the front two pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw, and the second left short fiber web and the second right short fiber web with reduced linear density are obtained through the drafting action of the left middle front drafting zone between the middle two pressing holding continuous conveying jaw and the front two pressing holding continuous conveying jaw and the right middle front drafting zone between the middle three pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw, while the third left short fiber strip and the third right short fiber strip are respectively held and output by the front one pressing holding continuous conveying jaw and the front four pressing holding continuous conveying jaw, and the third left short fiber web and the third right short fiber web with reduced linear density are obtained through the drafting action of the left upper front drafting zone between the middle one pressing holding continuous conveying jaw and the front one pressing holding continuous conveying jaw and the right upper front drafting zone between the middle four pressing holding continuous conveying jaw and the front four pressing holding continuous conveying jaw.

[0015] The production method of the wrapped blended yarn as described above, wherein preferably, in the production of the pure spun single yarn, the sliver of the staple fiber is twisted into the final pure spun single yarn under the action of the twisting twist degree transmitted by the twisting system of the spinning frame, and the pure spun single yarn is wound on the spinning tube in the clockwise or counterclockwise direction, in the process, the main motor drives all the spindles to rotate through the spindle belt, and then drives the spinning tube to rotate, the spinning tube rotates and then drives the pure spun single yarn to pass through the guide hook and the ring in turn and is wound on the spinning tube, so that the ring rotates around the ring traveler, at this time, due to the flexible structure of the pure spun single yarn and the weight of the ring itself, the winding speed of the pure spun single yarn on the spinning tube is less than the rotating speed of the spinning tube, the speed difference between the two produces the twisting twist degree, and the produced twisting twist degree is transmitted from bottom to top, when it is transmitted to the twisting point, the sliver of the staple fiber is twisted into the required pure spun single yarn under the action of the twisting twist degree.

[0016] The production method of the wrapped blended yarn as described above, wherein preferably, in the production of the pure spun Siro yarn, the first left sliver and the first right sliver or the second left sliver and the second right sliver output by the drafting system are twisted into the pure spun Siro yarn under the action of the twist level transmitted by the twisting system of the spinning frame, and the pure spun Siro yarn is wound on the spinning tube in the 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 spinning tube rotates and then drives the pure spun Siro yarn to pass through the guide hook and the ring in turn and is wound on the spinning tube, so that the ring rotates around the ring traveler, at this time, due to the flexible structure of the pure spun Siro yarn and the weight of the ring itself, the winding speed of the pure spun Siro yarn on the spinning tube is less than the rotating speed of the spinning tube, and the speed difference between the two produces a twist level, the produced twist level is transmitted from bottom to top, when it is transmitted to the lower twisting point, it continues to be transmitted along the direction of the first left sliver and the first right sliver or the second left sliver and the second right sliver respectively, so that the first left sliver or the second left sliver is twisted into the first left sub-yarn or the second left sub-yarn under the action of the first sub-twist transmitted, and the first right sliver or the second right sliver is twisted into the first right sub-yarn or the second right sub-yarn under the action of the second sub-twist transmitted, the first left sub-yarn and the first right sub-yarn are made into the final first Siro yarn at the lower twisting point under the action of the twist level transmitted, or the second left sub-yarn and the second right sub-yarn are made into the final second Siro yarn at the lower twisting point under the action of the twist level transmitted, at this time, due to the distance between the first left sliver and the first right sliver being greater than the distance between the second left sliver and the second right sliver, the first sub-twist transmitted along the first left sliver is greater than the first sub-twist transmitted along the second left sliver, the second sub-twist transmitted along the second left sliver is greater than the second sub-twist transmitted along the second right sliver, and then the twist level of the first left sub-yarn and the first right sub-yarn is greater than the twist level of the second left sub-yarn and the second right sub-yarn, at the same time, the winding twist of the first left sub-yarn and the first right sub-yarn in the first Siro yarn is less than the winding twist of the second left sub-yarn and the second right sub-yarn in the second Siro yarn, and then the layering and plying phenomenon in the first Siro yarn is less than the layering and plying phenomenon in the second Siro yarn.

[0017] The production method of the wrapped blended yarn as described above, wherein preferably, in the production of the wrapped blended siro yarn, the first pair of the left and right fluff strips including the first left fluff strip and the first right fluff strip, the second pair of the left and right fluff strips including the second left fluff strip and the second right fluff strip, and the third pair of the left and right fluff strips including the third left fluff strip and the third right fluff strip are output in the spatial superposition state of lower, middle, and upper, under the action of the twist degree of the twist system transmitted by the spinning frame, the mutual twisting between the first pair of the left and right fluff strips forms the inner layer yarn, the mutual twisting between the second pair of the left and right fluff strips and the spatial wrapping of the first pair of the left and right fluff strips at the same time form the middle layer yarn, and the mutual twisting between the third pair of the left and right fluff strips and the spatial wrapping of the first pair of the left and right fluff strips and the second pair of the left and right fluff strips at the same time form the outer layer yarn, so as to finally twist the wrapped blended yarn as required, and the wrapped blended yarn is wound on the spinning tube in the 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 spinning tube rotates and then drives the wrapped blended yarn to pass through the guide hook and the ring in turn and is wound on the spinning tube, so as to make the ring rotate around the ring traveler, at this time, due to the flexible structure of the wrapped blended yarn and the weight of the ring itself, the winding speed of the wrapped blended yarn on the spinning tube is less than the rotating speed of the spinning tube, the speed difference between the two produces the twist degree, the produced twist degree is transmitted from bottom to top, when it is transmitted to the lower twisting point, it continues to be transmitted along the directions of the first left fluff strip and the first right fluff strip, the second left fluff strip and the second right fluff strip, and the third left fluff strip and the third right fluff strip respectively, so as to make the first left fluff strip be twisted to the first left yarn under the action of the first left sub-twist degree transmitted, the first right fluff strip be twisted to the first right yarn under the action of the first right sub-twist degree transmitted, the first left yarn and the first right yarn be twisted to the inner layer yarn at the inner lower twisting point, the second left fluff strip be twisted to the second left yarn under the action of the second left sub-twist degree transmitted, the second right fluff strip be twisted to the second right yarn under the action of the second right sub-twist degree transmitted, and the second left yarn and the second right yarn be twisted to the middle layer yarn at the middle lower twisting point and wrap the inner layer yarn in the process of mutual twisting at the middle lower twisting point, so as to obtain the middle inner layer wrapped yarn, the middle lower twisting point is located below the inner lower twisting point, the third left fluff strip be twisted to the third left yarn under the action of the third left sub-twist degree transmitted, the third right fluff strip be twisted to the third right yarn under the action of the third right sub-twist degree transmitted, and the third left yarn and the third right yarn be twisted to the outer layer yarn at the outer lower twisting point and wrap the middle inner layer wrapped yarn in the process of mutual twisting at the outer lower twisting point, so as to obtain the final wrapped blended yarn, and the outer lower twisting point is located below the middle lower twisting point.

[0018] Compared with the prior art, the application adopts three rows of front, middle and rear drafting roller pairs driven separately, and the lower roller shaft of each drafting roller pair is sleeved with left and right rotating shaft sleeve groups arranged in axial symmetry, the left and right rotating shaft groups include concentrically nested first rotating shaft sleeve and second rotating shaft sleeve, and the second rotating shaft sleeve extends out of the first rotating shaft sleeve at one end, and the rubber roller shaft of the rubber roller cooperatively adopted is sleeved with left and right rubber roller sleeve groups arranged in axial symmetry, the left and right rubber roller sleeve groups include first rubber roller sleeve, second rubber roller sleeve and third rubber roller sleeve, thereby forming left and right symmetrical nip jaws for pressing and holding feeding of the corresponding three pairs of short fiber rovings on the roller shaft, the first rotating shaft sleeve and the second rotating shaft sleeve in the left and right rotating shaft sleeve groups respectively, thereby realizing the first pair of short fiber slivers output by pressing and drafting on the roller shaft, the second pair of short fiber slivers output by pressing and drafting on the second rotating shaft sleeve and the third pair of short fiber slivers output by pressing and drafting on the first rotating shaft sleeve in the space superposition state of lower, middle and upper to output the drafting system, thereby realizing the mutual twisting of the first pair of short fiber slivers into the inner layer yarn, the mutual twisting of the second pair of short fiber slivers and the space wrapping of the first pair of short fiber slivers at the same time to form the middle layer yarn, and the mutual twisting of the third pair of short fiber slivers and the space wrapping of the first pair of short fiber slivers and the second pair of short fiber slivers at the same time to form the outer layer yarn during the twisting process, thereby realizing the production of the required wrapped blended yarn, and then realizing the direct blending during the spinning process and making the different fiber components in the blended yarn arranged in layers, thereby improving the blending efficiency and realizing different blending purposes. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic diagram of the wrapped blended yarn production device of the application.

[0020] BRIEF DESCRIPTION OF DRAWINGS 1 - first left short fiber roving, 2 - second left short fiber roving, 3 - third left short fiber roving, 4 - first right short fiber roving, 5 - second right short fiber roving, 6 - third right short fiber 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 shaft sleeve, 15 - first rotating shaft 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 - steel ring, 25 - steel ring, 26 - spinning tube, 27 - rubber roller shaft. DETAILED DESCRIPTION

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

[0022] The application discloses a production method of wrapped blended yarn.

[0023] The application relates to a production method of wrapped blended yarn, and applies a wrapped blended yarn production device. Figure 1As shown, the production device of the wrapped blended yarn comprises a drafting system, the drafting system comprises three rows of drafting rollers: a pair of back drafting rollers, a pair of middle drafting rollers and a pair of front drafting rollers, the pair of back drafting rollers comprises a back lower roller 7 and a back upper roller 8, the pair of middle drafting rollers comprises a middle lower roller 9 and a middle upper roller 10, the pair of front drafting rollers comprises a front lower roller 11 and a front upper roller 12, the back lower roller 7, the middle lower roller 9 and the front lower roller 11 are of the same structure, the back lower roller 7, the middle lower roller 9 and the front lower roller 11 comprise a roller shaft 13, the roller shaft 13 is made of iron or steel, the roller shaft 13 is a solid cylindrical structure, the roller shafts 13 of the back lower rollers 7 of all spindles on the front bed of the spinning frame are integrally connected, the roller shafts 13 of the middle lower rollers 9 are integrally connected, the roller shafts 13 of the front lower rollers 11 are integrally connected, the roller shafts 13 of the back lower rollers 7 of all spindles on the back bed of the spinning frame are integrally connected, the roller shafts 13 of the middle lower rollers 9 are integrally connected, the roller shafts 13 of the front lower rollers 11 are integrally connected, the roller shaft 13 is sleeved with a left rotating shaft sleeve group and a right rotating shaft sleeve group arranged in axial symmetry, the left rotating shaft sleeve group and the right rotating shaft sleeve group comprise 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 both ends open, the material of the first rotating shaft sleeve 15 and the second rotating shaft sleeve 14 is completely the same as that of the roller shaft 13, the second rotating shaft sleeve 14 is directly sleeved on the roller shaft 13, the second rotating shaft sleeve 14 is integrally and fixedly connected with the roller shaft 13, and a certain interval is kept 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 interval is kept 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, and a certain interval is kept 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, 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, a certain gap is kept between the first rotating shaft sleeve 15 of the left rotating shaft sleeve group and the second rotating shaft sleeve 14 between the left end of the first rotating shaft sleeve 15 and the left end of the second rotating shaft sleeve 14, the right end of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group is located to the left of the right end of the first rotating shaft sleeve 15 with a certain interval therebetween, the right end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group is aligned with the right end of the roller shaft 13 of the spindle, and the first rotating shaft sleeve 15 of the right rotating shaft sleeve group is integrally and fixedly connected with the roller shaft 13 between the right end of the first rotating shaft sleeve 15 and the right end of the second rotating shaft sleeve 14,The first rotating shaft sleeve 15 and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group keep a certain gap between the left end of the second rotating shaft sleeve 14 and the left end of the first rotating shaft sleeve 15, and the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group is located to the right of the left end of the first rotating shaft sleeve 15 and keeps a certain distance therebetween.

[0024] The rear top glue roller 8, the middle top glue roller 10 and the front top glue roller 12 are the same in structure, and the rear top glue roller 8, the middle top glue roller 10 and the front top glue roller 12 comprise a glue roller shaft 27, the glue roller shaft 27 is made of iron or steel, and the glue roller shaft 27 is in a solid cylindrical structure, one spindle position of the front carrier platform of the spinning machine and one adjacent spindle position on the left or right side form a spindle position group, one spindle position of the rear carrier platform of the spinning machine and one adjacent spindle position on the left or right side form a spindle position group, the glue roller shaft 27 of the rear top glue roller 8 of the two spindle positions of each spindle position group of the front carrier platform of the spinning machine is integrally connected, the glue roller shaft 27 of the middle top glue roller 10 is integrally connected, the glue roller shaft 27 of the front top glue roller 12 is integrally connected, the glue roller shaft 27 of the rear top glue roller 8 of the two spindle positions of each spindle position group of the rear carrier platform of the spinning machine is integrally connected, the glue roller shaft 27 of the middle top glue roller 10 is integrally connected, and the glue roller shaft 27 of the front top glue roller 12 is integrally connected, the left glue roller sleeve group and the right glue roller sleeve group arranged in axial symmetry are sleeved on the glue roller shaft 27, the left glue roller sleeve group and the right glue roller sleeve group comprise a first glue roller sleeve 16 and a second glue roller sleeve 17, a middle glue roller sleeve 18 is arranged between the left glue roller sleeve group and the right glue roller sleeve group, the first glue roller sleeve 16, the second glue roller sleeve 17 and the middle glue roller sleeve 18 are connected with the glue roller shaft 27 through bearings, so that the first glue roller sleeve 16, the second glue roller sleeve 17 and the middle glue roller sleeve 18 can rotate around the glue roller shaft 27 independently, the diameter of the first glue roller sleeve 16 is smaller than that of the second glue roller sleeve 17, the diameter of the second glue roller sleeve 17 is smaller than that of the middle glue roller sleeve 18, the left end of the first glue roller sleeve 16 of the left glue roller sleeve group is vertically aligned with the left end of the glue roller shaft 27 and the left end of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group, the right end of the first glue roller sleeve 16 of the left glue 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 glue roller sleeve 17 of the left glue 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 glue roller sleeve 17 of the left glue 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 glue roller sleeve 16 of the right glue roller sleeve group is vertically aligned with the right end of the glue roller shaft 27 and the right end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group, the left end of the first glue roller sleeve 16 of the right glue roller sleeve group is vertically aligned with the left end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group, the right end of the second glue roller sleeve 17 of the right glue roller sleeve group is vertically aligned with the left end of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group, the left end of the second glue roller sleeve 17 of the right glue roller sleeve group is vertically aligned with the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group, the left end of the middle glue roller sleeve 18 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 middle glue roller sleeve 18 is vertically aligned with the left end of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group, the glue roller shaft 27 between the right glue roller sleeve group of the rear top glue roller 8 of the left spindle position in one spindle position group and the left glue roller sleeve group of the rear top glue roller 8 of the right spindle position is embedded in the rear embedding grab of the pressing assembly,Thus, the rear top rubber roller 8 is installed on the pressing assembly, the rubber roller shaft 27 between the right rubber roller sleeve group of the middle top rubber roller 10 of the left spinning position and the left rubber roller sleeve group of the middle top rubber roller 10 of the right spinning position in one spinning position group is embedded in the middle embedded grab of the pressing assembly, thus, the middle top rubber roller 10 is installed on the pressing assembly, the rubber roller shaft 27 between the right rubber roller sleeve group of the front top rubber roller 12 of the left spinning position and the left rubber roller sleeve group of the front top rubber roller 12 of the right spinning position in one spinning position group is embedded in the front embedded grab of the pressing assembly, thus, the front top rubber roller 12 is installed on the pressing assembly.

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

[0026] In use, the pressing assembly is pressed down, so that the first rubber roller sleeve 16 of the left rubber roller sleeve group of the rear top rubber roller 8 is in close pressing contact with the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear bottom roller 7, thus forming a rear first pressing holding jaw between the first rubber roller sleeve 16 of the left rubber roller sleeve group of the rear top rubber roller 8 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the rear bottom roller 7, so that the second rubber roller sleeve 17 of the left rubber roller sleeve group of the rear top rubber roller 8 is in close pressing contact with the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rear bottom roller 7 which extends from the first rotating shaft sleeve 15, thus forming a rear second pressing holding jaw between the second rubber roller sleeve 17 of the left rubber roller sleeve group of the rear top rubber roller 8 and the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the rear bottom roller 7 which extends from the first rotating shaft sleeve 15, so that the middle rubber roller sleeve 18 of the rear top rubber roller 8 is in close pressing contact with the roller shaft 13 of the rear bottom roller 7 which is 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, thus forming a rear middle pressing holding jaw between the middle rubber roller sleeve 18 of the rear top rubber roller 8 and the roller shaft 13 of the rear bottom roller 7 which is 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, so that the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear top rubber roller 8 is in close pressing contact with the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rear bottom roller 7 which extends from the first rotating shaft sleeve 15, thus forming a rear third pressing holding jaw between the second rubber roller sleeve 17 of the right rubber roller sleeve group of the rear top rubber roller 8 and the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the rear bottom roller 7 which extends from the first rotating shaft sleeve 15, so that the first rubber roller sleeve 16 of the right rubber roller sleeve group of the rear top 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 bottom roller 7, thus forming a rear fourth pressing holding jaw between the first rubber roller sleeve 16 of the right rubber roller sleeve group of the rear top rubber roller 8 and the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the rear bottom roller 7.

[0027] Simultaneously, the first rubber roller sleeve 16 of the left rubber roller sleeve group of the upper rubber roller 10 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the lower rubber roller 9 are pressed into close contact, thereby forming a pressing gripping jaw between the first rubber roller sleeve 16 of the left rubber roller sleeve group of the upper rubber roller 10 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the lower rubber roller 9, so that the second rubber roller sleeve 17 of the left rubber roller sleeve group of the upper rubber roller 10 and the left rotating shaft sleeve group of the lower rubber roller 9 extend out of the first rotating shaft sleeve. The second rotating bushing 14 of the upper roller 10 and the lower roller 9 are pressed tightly together, thereby forming a pressing gripping jaw between the second roller bushing 17 of the left roller bushing group of the upper roller 10 and the second rotating bushing 14 of the left rotating bushing group of the lower roller 9, which extends from the first rotating bushing 15. This results in a tight pressing contact between the middle roller bushing 18 of the upper roller 10 and the roller shaft 13 of the lower roller 9 located between the second rotating bushing 14 of the left rotating bushing group and the second rotating bushing 14 of the right rotating bushing group. This creates a middle pressing and gripping jaw between the middle rubber roller sleeve 18 of the upper rubber roller 10 and the second rotating sleeve 14 of the left rotating sleeve group and the second rotating sleeve 14 of the right rotating sleeve group of the lower rubber roller 9. This results in a tight pressing contact between the second rubber roller sleeve 17 of the right rubber roller sleeve group of the upper rubber roller 10 and the second rotating sleeve 14 of the right rotating sleeve group of the lower rubber roller 9, which extends from the first rotating sleeve 15. A three-way pressing grip jaw is formed between the second rotating sleeve 14 of the right rotating sleeve 15 of the middle and lower roller 9 and the right rotating sleeve 15 of the middle and lower roller 9, so that the first rubber roller sleeve 16 of the right rubber roller sleeve 10 and the first rotating sleeve 15 of the right rotating sleeve 15 of the middle and lower roller 9 are in close pressing contact, thereby forming a four-way pressing grip jaw between the first rubber roller sleeve 16 of the right rubber roller sleeve 10 and the first rotating sleeve 15 of the right rotating sleeve 15 of the middle and lower roller 9.

[0028] Meanwhile, the first rubber sleeve 16 of the left rubber sleeve set of the front top rubbering roller 12 is tightly pressed against the first rotating shaft sleeve 15 of the left rotating shaft sleeve set of the front bottom roller 11, so that a first pressing holding nip is formed between the first rubber sleeve 16 of the left rubber sleeve set of the front top rubbering roller 12 and the first rotating shaft sleeve 15 of the left rotating shaft sleeve set of the front bottom roller 11, the second rotating shaft sleeve 14 of the left rotating shaft sleeve set of the front bottom roller 11 is extended from the first rotating shaft sleeve 15, the second rubber sleeve 17 of the left rubber sleeve set of the front top rubbering roller 12 is tightly pressed against the second rotating shaft sleeve 14 of the left rotating shaft sleeve set of the front bottom roller 11 which is extended from the first rotating shaft sleeve 15, so that a second pressing holding nip is formed between the second rubber sleeve 17 of the left rubber sleeve set of the front top rubbering roller 12 and the second rotating shaft sleeve 14 of the left rotating shaft sleeve set of the front bottom roller 11 which is extended from the first rotating shaft sleeve 15, the rubber roller shaft 13 of the front bottom roller 11 is located between the second rotating shaft sleeve 14 of the left rotating shaft sleeve set and the second rotating shaft sleeve 14 of the right rotating shaft sleeve set, the middle rubber sleeve 18 of the front top rubbering roller 12 is tightly pressed against the rubber roller shaft 13 of the front bottom roller 11 which is located between the second rotating shaft sleeve 14 of the left rotating shaft sleeve set and the second rotating shaft sleeve 14 of the right rotating shaft sleeve set, so that a middle pressing holding nip is formed between the middle rubber sleeve 18 of the front top rubbering roller 12 and the rubber roller shaft 13 of the front bottom roller 11 which is located between the second rotating shaft sleeve 14 of the left rotating shaft sleeve set and the second rotating shaft sleeve 14 of the right rotating shaft sleeve set, the second rotating shaft sleeve 14 of the right rotating shaft sleeve set of the front bottom roller 11 is extended from the first rotating shaft sleeve 15, the second rubber sleeve 17 of the right rubber sleeve set of the front top rubbering roller 12 is tightly pressed against the second rotating shaft sleeve 14 of the right rotating shaft sleeve set of the front bottom roller 11 which is extended from the first rotating shaft sleeve 15, so that a third pressing holding nip is formed between the second rubber sleeve 17 of the right rubber sleeve set of the front top rubbering roller 12 and the second rotating shaft sleeve 14 of the right rotating shaft sleeve set of the front bottom roller 11 which is extended from the first rotating shaft sleeve 15, the first rotating shaft sleeve 15 of the right rotating shaft sleeve set of the front bottom roller 11 is tightly pressed against the first rubber sleeve 16 of the right rubber sleeve set of the front top rubbering roller 12, so that a fourth pressing holding nip is formed between the first rubber sleeve 16 of the right rubber sleeve set of the front top rubbering roller 12 and the first rotating shaft sleeve 15 of the right rotating shaft sleeve set of the front bottom 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 roller sleeve 18 of the rear upper rubber roller 8 in close pressing contact to rotate, so that the rear middle pressing holding jaw is changed into a rear middle pressing holding continuous conveying jaw. The roller shaft 13 of the rear lower roller 7 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 to rotate around the rubber roller shaft 27, so that the rear pressing holding jaw is changed into a rear pressing holding continuous conveying jaw. The roller shaft 13 of the rear lower roller 7 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 17 of the left rubber roller sleeve group of the rear upper rubber roller 8 in close pressing contact to rotate around the rubber roller shaft 27, so that the rear second pressing holding jaw is changed into a rear second pressing holding continuous conveying jaw. The roller shaft 13 of the rear lower roller 7 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 to rotate around the rubber roller shaft 27, so that the rear fourth pressing holding jaw is changed into a rear fourth pressing holding continuous conveying jaw. The roller shaft 13 of the rear lower roller 7 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 to rotate around the rubber roller shaft 27, so that the rear third pressing holding jaw is changed into a rear third pressing holding continuous conveying jaw.

[0030] The second servo motor 20 drives the roller shaft 13 of the middle lower roller 9 to rotate, and in turn drives the middle rubber roller sleeve 18 of the middle upper rubber roller 10 in close pressing contact to rotate, so that the middle pressing holding nip is changed into a middle pressing holding continuous conveying nip. The roller shaft 13 of the middle lower roller 9 drives the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the middle lower roller 9 in fixed connection to rotate, and in turn drives the first rubber roller sleeve 16 of the left rubber roller sleeve group of the middle upper rubber roller 10 in close pressing contact to rotate around the rubber roller shaft 27, so that the middle one pressing holding nip is changed into a middle one pressing holding continuous conveying nip. The roller shaft 13 of the middle lower roller 9 drives the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the middle lower roller 9 in integral connection to rotate, and in turn drives the second rubber roller sleeve 17 of the left rubber roller sleeve group of the middle upper rubber roller 10 in close pressing contact to rotate around the rubber roller shaft 27, so that the middle two pressing holding nip is changed into a middle two pressing holding continuous conveying nip. The roller shaft 13 of the middle lower roller 9 drives the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the middle lower roller 9 in fixed connection to rotate, and in turn 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 to rotate around the rubber roller shaft 27, so that the middle four pressing holding nip is changed into a middle four pressing holding continuous conveying nip. The roller shaft 13 of the middle lower roller 9 drives the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the middle lower roller 9 in integral connection to rotate, and in turn 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 to rotate around the rubber roller shaft 27, so that the middle three pressing holding nip is changed into a middle three pressing holding continuous conveying nip.

[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 top rubber roller 12 in close pressing contact to rotate, so that the front middle pressing holding nip is changed into a front middle pressing holding continuous conveying nip. 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 top rubber roller 12 in close pressing contact to rotate around the rubber roller shaft 27, so that the middle front one pressing holding nip is changed into a front one pressing holding continuous conveying nip. 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 integrally connected thereto to rotate, and then drives the second rubber roller sleeve 17 of the left rubber roller sleeve group of the front top rubber roller 12 in close pressing contact to rotate around the rubber roller shaft 27, so that the front two pressing holding nip is changed into a front two pressing holding continuous conveying nip. 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 top rubber roller 12 in close pressing contact to rotate around the rubber roller shaft 27, so that the front four pressing holding nip is changed into a front four pressing holding continuous conveying nip. 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 top rubber roller 12 in close pressing contact to rotate around the rubber roller shaft 27, so that the front three pressing holding nip is changed into a front three pressing holding continuous conveying nip.

[0032] During spinning, pure spinning single yarn production, pure spinning siro yarn production, and wrapped blended siro yarn production are included. For pure spinning single yarn production, a short fiber roving unwound from a roving tube is first held into the drafting system through the rear middle pressing holding continuous conveying nip, and then held out through the middle pressing holding continuous conveying nip, during which the short fiber bundle is subjected to the drafting action of the lower rear drafting zone between the rear middle pressing holding continuous conveying nip and the middle pressing holding continuous conveying nip to obtain a short fiber bundle with reduced linear density, and the short fiber bundle is then held out of the drafting system through the front middle pressing holding continuous conveying nip, during which the short fiber bundle is subjected to the drafting action of the lower front drafting zone between the middle pressing holding continuous conveying nip and the front middle pressing holding continuous conveying nip to obtain a short fiber sliver with reduced linear density, so that the drafting action of the drafting system on the fed-in short fiber roving is completed.

[0033] For pure spun siro yarn production, the first left and right short fiber roving pair including the first left short fiber roving 1 and the first right short fiber roving 4 respectively unwound from two roving tubes is held by the left and right sides of the middle pressing holding continuous conveying nip respectively and enters the drafting system, or 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 two roving tubes is held by the second pressing holding continuous conveying nip and the third pressing holding continuous conveying nip respectively and enters the drafting system, at this time, the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the right rotating back lower roller 7 contacts the first left short fiber roving 1 at the rear arc point of the diameter which keeps horizontal with the first left short fiber roving 1, the sleeve wall surface of the second rotating shaft sleeve 14 of the left rotating shaft sleeve group of the right rotating back lower roller 7 contacts the first left short fiber roving 1 at the front arc point of the diameter which keeps horizontal with the first left short fiber roving 1, the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the left rotating back lower roller 7 contacts the first right short fiber roving 4 at the rear arc point of the diameter which keeps horizontal with the first right short fiber roving 4, the sleeve wall surface of the second rotating shaft sleeve 14 of the right rotating shaft sleeve group of the left rotating back lower roller 7 contacts the first right short fiber roving 4 at the front arc point of the diameter which keeps horizontal with the first right short fiber roving 4, or the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the right rotating back lower roller 7 contacts the second left short fiber roving 2 at the rear arc point of the diameter which keeps horizontal with the second left short fiber roving 2, the sleeve wall surface of the first rotating shaft sleeve 15 of the left rotating shaft sleeve group of the right rotating back lower roller 7 contacts the second left short fiber roving 2 at the front arc point of the diameter which keeps horizontal with the second left short fiber roving 2, the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the left rotating back lower roller 7 contacts the second right short fiber roving 5 at the rear arc point of the diameter which keeps horizontal with the second right short fiber roving 5, the sleeve wall surface of the first rotating shaft sleeve 15 of the right rotating shaft sleeve group of the left rotating back lower roller 7 contacts the second right short fiber roving 5 at the front arc point of the diameter which keeps horizontal with the second right short fiber roving 5, in the contacting process, 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 are driven upward under the friction force, thereby realizing the uniform distribution arrangement of the short fibers in the cross section of the short fiber roving, and then realizing the upper arrangement of the short fiber roving,The front arc point produces downward driving effect on 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 under the friction force, thereby realizing uniform distribution arrangement of the short fibers in the short fiber rovings in the cross section, and then realizing the lower arrangement of the short fiber rovings.

[0034] And then the first left short fiber roving 1 and the first right short fiber roving 4 are respectively held and outputted by the left side and the right side of the middle pressing holding continuous conveying nipper, or the second left short fiber roving 2 and the second right short fiber roving 5 are respectively held and outputted by the middle two pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, so that the first left short fiber roving 1 and the first right short fiber roving 4 get the first left short fiber bundle and the first right short fiber bundle with reduced linear density under the stretching effect of the lower rear stretching area between the rear middle pressing holding continuous conveying nipper and the middle pressing holding continuous conveying nipper, or the second left short fiber roving 2 gets the second left short fiber bundle with reduced linear density under the stretching effect of the left middle rear stretching area between the rear two pressing holding continuous conveying nipper and the middle two pressing holding continuous conveying nipper, and the second right short fiber roving 5 gets the second right short fiber bundle with reduced linear density under the stretching effect of the right middle rear stretching area between the rear three pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, at this time, 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 of the first left short fiber roving 1 contacts the first left short fiber roving 1 at the rear arc point of the diameter which keeps horizontal with the first left short fiber roving 1, 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 of the first left short fiber bundle contacts the first left short fiber bundle at the front arc point of the diameter which keeps horizontal with the first left short fiber bundle, 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 located on the left side of the first right short fiber roving 4 contacts the first right short fiber roving 4 at the rear arc point of the diameter which keeps horizontal with the first right short fiber roving 4, 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 located on the left side of the first right short fiber bundle contacts the first right short fiber bundle at the front arc point of the diameter which keeps horizontal with the first right short fiber bundle, or 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 located on the right side of the second left short fiber roving 2 contacts the second left short fiber roving 2 at the rear arc point of the diameter which keeps horizontal with the second left short fiber roving 2, 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 located on the right side of the second left short fiber bundle contacts the second left short fiber bundle at the front arc point of the diameter which keeps horizontal with the second left short fiber bundle, 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 located on the left side of the second right short fiber roving 5 contacts the second right short fiber roving 5 at the rear arc point of the diameter which keeps horizontal with the second right short fiber roving 5, 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 located on the left side of the second right short fiber bundle contacts the second right short fiber bundle at the front arc point of the diameter which keeps horizontal with the second right short fiber bundle, in the contacting process,The back arc point produces upward driving effect on 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 under the frictional force, thereby realizing the uniform distribution arrangement of the short fibers in the short fiber rovings before drafting in the back drafting zone in the cross section, and then realizing the upper arrangement of the short fiber rovings, the front arc point produces downward driving effect on 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 under the frictional force, thereby realizing the uniform distribution arrangement of the short fibers in the short fiber bundles after drafting in the back drafting zone in the cross section, and then realizing the lower arrangement of the short fiber bundles.

[0035] And then the first left short fiber bundle and the first right short fiber bundle are respectively held and output by the left side and the right side of the front middle pressing holding continuous conveying jaw, or the second left short fiber bundle and the second right short fiber bundle are respectively held and output by the front two pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw, so that the first left short fiber bundle and the first right short fiber bundle are stretched in the front lower stretching area between the middle pressing holding continuous conveying jaw and the front middle pressing holding continuous conveying jaw to obtain the first left short fiber sliver and the first right short fiber sliver with reduced linear density, or the second left short fiber bundle is stretched in the left middle front stretching area between the middle two pressing holding continuous conveying jaw and the front two pressing holding continuous conveying jaw, and the second right short fiber bundle is stretched in the right middle front stretching area between the middle three pressing holding continuous conveying jaw and the front three pressing holding continuous conveying jaw to obtain the second left short fiber sliver and the second right short fiber sliver with reduced linear density, at this time, 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 on the right side contacts the first left short fiber bundle at the rear arc point of the diameter that keeps horizontal with the first left short fiber bundle, 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 on the right side contacts the first left short fiber sliver at the front arc point of the diameter that keeps horizontal with the first left short fiber sliver, 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 the first right short fiber bundle at the rear arc point of the diameter that keeps horizontal with the first right short fiber bundle, 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 the first right short fiber sliver at the front arc point of the diameter that keeps horizontal with the first right short fiber sliver, or 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 contacts the second left short fiber bundle at the rear arc point of the diameter that keeps horizontal with the second left short fiber bundle, 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 contacts the second left short fiber sliver at the front arc point of the diameter that keeps horizontal with the second left short fiber sliver, 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 contacts the second right short fiber bundle at the rear arc point of the diameter that keeps horizontal with the second right short fiber bundle, and 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 contacts the second right short fiber sliver at the front arc point of the diameter that keeps horizontal with the second right short fiber sliver, in the contacting process,The back arc point produces upward driving effect on 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 under the frictional force, thereby realizing the uniform distribution arrangement of the short fibers in the short fiber bundle before drafting in the front drafting zone in the cross section, and then realizing the upper arrangement of the short fiber bundle. The front arc point produces downward driving effect on the short fibers in the first left short fiber sliver, the first right short fiber sliver or the second left short fiber sliver, the second right short fiber sliver under the frictional force, thereby realizing the uniform distribution arrangement of the short fibers in the short fiber sliver obtained by drafting in the front drafting zone in the cross section, and then realizing the lower arrangement of the short fiber sliver.

[0036] For the production of wrapped blended siro yarn, the first pair of short fiber rovings including the first left short fiber roving 1 and the first right short fiber roving 4 unwound from two roving tubes respectively are held by the left side and the right side of the rear middle pressing continuous conveying jaw respectively and enter the drafting system, at the same time, the second pair of short fiber rovings including the second left short fiber roving 2 and the second right short fiber roving 5 unwound from two roving tubes respectively are held by the rear second pressing continuous conveying jaw and the rear third pressing continuous conveying jaw respectively and enter the drafting system, at the same time, the third pair of short fiber rovings including the third left short fiber roving 3 and the third right short fiber roving 6 unwound from two roving tubes respectively are held by the rear first pressing continuous conveying jaw and the rear fourth pressing continuous conveying jaw respectively and enter the drafting system, at this time, the first left short fiber roving 1 is subjected to the upper arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the rear lower roller 7 in contact therewith before holding, and is subjected to the lower arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the rear lower roller 7 in contact therewith after holding, the first right short fiber roving 4 is subjected to the upper arrangement 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 therewith before holding, and is subjected to the lower arrangement 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 therewith after holding, the second left short fiber roving 2 is subjected to the upper arrangement action 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 therewith before holding, and is subjected to the lower arrangement action 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 therewith after holding, the second right short fiber roving 5 is subjected to the upper arrangement action 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 therewith before holding, and is subjected to the lower arrangement action 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 therewith after holding.

[0037] The first left short fiber roving 1 and the first right short fiber roving 4 are respectively held and output by the left side and the right side of the middle pressing holding continuous conveying nipper, and the first left short fiber bundle and the first right short fiber bundle with reduced linear density are obtained through the drafting action of the lower rear drafting zone between the rear middle pressing holding continuous conveying nipper and the middle pressing holding continuous conveying nipper, while the second left short fiber roving 2 and the second right short fiber roving 5 are respectively held and output by the middle two pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, and the second left short fiber bundle and the second right short fiber bundle with reduced linear density are obtained through the drafting action of the left middle rear drafting zone between the rear two pressing holding continuous conveying nipper and the middle two pressing holding continuous conveying nipper, and the right middle rear drafting zone between the rear three pressing holding continuous conveying nipper and the middle three pressing holding continuous conveying nipper, while the third left short fiber roving 3 and the third right short fiber roving 6 are respectively held and output by the middle one pressing holding continuous conveying nipper and the middle four pressing holding continuous conveying nipper, and the third left short fiber bundle and the third right short fiber bundle with reduced linear density are obtained through the drafting action of the left upper rear drafting zone between the rear one pressing holding continuous conveying nipper and the middle one pressing holding continuous conveying nipper, and the right upper rear drafting zone between the rear four pressing holding continuous conveying nipper and the middle four pressing holding continuous conveying nipper.

[0038] The first left short fiber strip and the first right short fiber strip are respectively held and output by the left side and the right side of the front middle pressing holding continuous conveying nipper, and the first left short fiber web and the first right short fiber web with reduced linear density are obtained through the drafting action of the lower front drafting zone between the middle pressing holding continuous conveying nipper and the front middle pressing holding continuous conveying nipper. Meanwhile, the second left short fiber strip and the second right short fiber strip are respectively held and output by the front two pressing holding continuous conveying nipper and the front three pressing holding continuous conveying nipper, and the second left short fiber web and the second right short fiber web with reduced linear density are obtained through the drafting action of the left middle front drafting zone between the middle two pressing holding continuous conveying nipper and the front two pressing holding continuous conveying nipper and the right middle front drafting zone between the middle three pressing holding continuous conveying nipper and the front three pressing holding continuous conveying nipper. Meanwhile, the third left short fiber strip and the third right short fiber strip are respectively held and output by the front one pressing holding continuous conveying nipper and the front four pressing holding continuous conveying nipper, and the third left short fiber web and the third right short fiber web with reduced linear density are obtained through the drafting action of the left upper front drafting zone between the middle one pressing holding continuous conveying nipper and the front one pressing holding continuous conveying nipper and the right upper front drafting zone between the middle four pressing holding continuous conveying nipper and the front four pressing holding continuous conveying nipper. At this time, the first left short fiber strip is subjected to the upper arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the front lower roller 11 before being held, and the first left short fiber web obtained through drafting after being held is subjected to the lower arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the left rotating sleeve group of the front lower roller 11. The first right short fiber strip is subjected to the upper arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the front lower roller 11 before being held, and the first right short fiber web obtained through drafting after being held is subjected to the lower arrangement action of the sleeve wall surface of the second rotating sleeve 14 of the right rotating sleeve group of the front lower roller 11. The second left short fiber strip is subjected to the upper arrangement action of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the front lower roller 11 before being held, and the second left short fiber web obtained through drafting after being held is subjected to the lower arrangement action of the sleeve wall surface of the first rotating sleeve 15 of the left rotating sleeve group of the front lower roller 11. The second right short fiber strip is subjected to the upper arrangement action of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the front lower roller 11 before being held, and the second right short fiber web obtained through drafting after being held is subjected to the lower arrangement action of the sleeve wall surface of the first rotating sleeve 15 of the right rotating sleeve group of the front lower roller 11.

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

[0040] For pure spinning sirospun yarn production, the first left short fiber sliver and the first right short fiber sliver or the second left short fiber sliver and the second right short fiber sliver output by the drafting system are twisted to obtain pure spinning sirospun yarn under the action of the twisting twist transmitted by the twisting system of the spinning frame, and the pure spinning sirospun yarn is wound on the spinning tube 26 in the clockwise or counterclockwise direction. In this process, the main motor drives all spindles to rotate through the spindle belt, and in turn drives the spinning tube 26 to rotate, and the spinning tube 26 rotates in turn and drives the pure spinning sirospun yarn to pass through the guide hook 23 and the ring 24 in turn and wind on the spinning tube 26, so that the ring 24 rotates around the ring rail 25. At this time, since the pure spinning sirospun yarn is a flexible structure and due to the weight of the ring 24 itself, the winding speed of the pure spinning sirospun yarn on the spinning tube 26 is less than the rotating speed of the spinning tube 26, and the speed difference between the two produces a twisting twist, and the produced twisting twist 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 short fiber sliver and the first right short fiber sliver or the second left short fiber sliver and the second right short fiber sliver, so that the first left short fiber sliver or the second left short fiber sliver is twisted to obtain the first left sub-yarn or the second left sub-yarn under the action of the first sub-twist transmitted, and the first right short fiber sliver or the second right short fiber sliver is twisted to obtain the first right sub-yarn or the second right sub-yarn under the action of the second sub-twist transmitted. The first left sub-yarn and the first right sub-yarn are made into the final first sirospun yarn under the action of the twisting 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 sirospun yarn under the action of the twisting twist transmitted at the lower twisting point. At this time, since the distance between the first left short fiber sliver and the first right short fiber sliver is greater than the distance between the second left short fiber sliver and the second right short fiber sliver, the first sub-twist transmitted along the first left short fiber sliver is greater than the first sub-twist transmitted along the second left short fiber sliver, the second sub-twist transmitted along the second left short fiber sliver is greater than the second sub-twist transmitted along the second right short fiber sliver, and in turn 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. At the same time, the twisting twist of the first left sub-yarn and the first right sub-yarn in the first sirospun yarn is less than the twisting twist of the second left sub-yarn and the second right sub-yarn in the second sirospun yarn, and in turn the layering and plying phenomenon in the first sirospun yarn is less than the layering and plying phenomenon in the second sirospun yarn.

[0041] For the production of wrapped blended spun yarn, the first pair of short fiber strips including the first left short fiber strip and the first right short fiber strip, the second pair of short fiber strips including the second left short fiber strip and the second right short fiber strip, and the third pair of short fiber strips including the third left short fiber strip and the third right short fiber strip output by the drafting system are output in a spatially superimposed state from bottom to middle to top, under the action of the twist transferred from the twisting system of the spinning frame, the mutual twisting between the first pair of short fiber strips forms the inner layer yarn, the mutual twisting between the second pair of short fiber strips and the spatial wrapping of the first pair of short fiber strips at the same time form the middle layer yarn, and the mutual twisting between the third pair of short fiber strips and the spatial wrapping of the first pair of short fiber strips and the second pair of short fiber strips at the same time form the outer layer yarn, so that the required wrapped blended yarn is finally twisted, and the wrapped blended yarn is wound on the spinning tube 26 in the clockwise or counterclockwise direction. In this process, the main motor drives all the spindles to rotate through the spindle belt, and in turn drives the spinning tube 26 to rotate, and the spinning tube 26 rotates in turn and drives the wrapped blended yarn to pass through the guide hook 23 and the steel ring 24 in turn and wind on the spinning tube 26, so that the steel ring 24 rotates around the steel ring 25. At this time, due to the flexible structure of the wrapped blended yarn and the weight of the steel ring 24 itself, the winding speed of the wrapped blended yarn on the spinning tube 26 is less than the rotating speed of the spinning tube 26, and the speed difference between the two produces a twisting twist, and the twisting twist produced is transferred from bottom to top, and when it is transferred to the lower twisting point, it continues to be transferred along the directions of the first left short fiber strip and the first right short fiber strip, the second left short fiber strip and the second right short fiber strip, and the third left short fiber strip and the third right short fiber strip respectively, so that the first left short fiber strip is twisted to obtain the first left sub-yarn under the action of the first left sub-twist transferred, the first right short fiber strip is twisted to obtain the first right sub-yarn under the action of the first right sub-twist transferred, and at the same time, the first left sub-yarn and the first right sub-yarn are twisted and wound into the inner layer yarn at the inner lower twisting point, the second left short fiber strip is twisted to obtain the second left sub-yarn under the action of the second left sub-twist transferred, the second right short fiber strip is twisted to obtain the second right sub-yarn under the action of the second right sub-twist transferred, and at the same time, the second left sub-yarn and the second right sub-yarn are twisted and wound into the middle layer yarn at the middle lower twisting point, and the second left sub-yarn and the second right sub-yarn wrap the inner layer yarn during the mutual twisting and winding at the middle lower twisting point, so as to obtain the middle inner layer wrapped yarn, wherein the middle lower twisting point is located below the inner lower twisting point, the third left short fiber strip is twisted to obtain the third left sub-yarn under the action of the third left sub-twist transferred, the third right short fiber strip is twisted to obtain the third right sub-yarn under the action of the third right sub-twist transferred, and at the same time, the third left sub-yarn and the third right sub-yarn are twisted and wound into the outer layer yarn at the outer lower twisting point, and the third left sub-yarn and the third right sub-yarn wrap the middle inner layer wrapped yarn during the mutual twisting and winding at the outer lower twisting point, so as to obtain the final wrapped blended yarn, wherein the outer lower twisting point is located below the middle lower twisting point.

[0042] The above detailed description of the structure, features and effects of the present application is based on the embodiments shown in the drawings. The above description is only the preferred embodiments of the present application, but the present application is not limited to the embodiments shown in the drawings. Any changes or modifications made in accordance with the concept of the present application, or equivalent embodiments with equivalent changes, are still within the scope of the present application.

Claims

1. A method for producing wrapped blended yarn, using a production apparatus for wrapped blended yarn, characterized in that: The production apparatus for wrapping blended yarn includes a drafting system, which comprises three independently driven pairs of drafting rollers: front, middle, and rear. On the roller shaft of the lower roller of each drafting roller pair, left and right rotating shaft sleeves are arranged symmetrically. Each left and right rotating shaft sleeve includes a first rotating shaft sleeve and a second rotating shaft sleeve nested concentrically, with one end of the second rotating shaft sleeve extending beyond the first rotating shaft sleeve. On the rubber roller shaft of the upper rubber roller of each drafting roller pair, left and right rubber roller sleeves are arranged symmetrically. Each left and right rubber roller sleeve 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 three corresponding short fiber roving pressing and gripping feeding mouths on the left side of the first rotating shaft sleeve and the second rotating shaft sleeve within the roller shaft and the left rotating shaft sleeve group, and three corresponding short fiber roving pressing and gripping feeding mouths on the right side of the first rotating shaft sleeve and the second rotating shaft sleeve within the roller shaft and the right rotating shaft sleeve group. The three pairs of short fiber roving pressing and gripping feeding mouths on the left side and the three pairs of short fiber roving pressing and gripping feeding mouths on the right side are arranged symmetrically. The first short fiber roving is fed by the short fiber roving formed on the left side of the roller shaft. The first pair of short fiber slivers is output after the yarn is pressed and gripped into the nip, and the short fiber roving on the right side is pressed and gripped into the nip. The second pair of short fiber rovings, formed on the second rotating shaft sleeve, is pressed and gripped into the nip, and the second pair of short fiber slivers is output after drafting. The third pair of short fiber rovings, formed on the first rotating shaft sleeve, is pressed and gripped into the nip, and the third pair of short fiber slivers is output after drafting. The first pair of short fiber slivers and the second pair of short fiber rovings... The short fiber slivers and the third pair of short fiber slivers are output to the drafting system in a spatially overlapping state of lower, middle and upper. Under the action of twisting, the first pair of short fiber slivers twists with each other to form an inner layer yarn, the second pair of short fiber slivers twists with each other and simultaneously spatially wraps the first pair of short fiber slivers to form a middle layer yarn, and the third pair of short fiber slivers twists with each other and simultaneously spatially wraps the first pair of short fiber slivers and the second pair of short fiber slivers to form an outer layer yarn. This produces a directly blended yarn in the fine yarn process, which results in a layered arrangement of different fiber components in the blended yarn.

2. The method for producing wrapped blended yarn according to claim 1, characterized in that: Both the first and second rotating bushings are cylindrical hollow structures with open ends. The materials of the first and second rotating bushings are identical to those of the roller shaft. The second rotating bushing is directly fitted onto the roller shaft, forming an integrated, fixed connection. A certain distance is maintained between the right end of the second rotating bushing in the left rotating bushing group and the left end of the second rotating bushing in the right rotating bushing group. Similarly, a certain distance is maintained between the left end of the second rotating bushing in the left rotating bushing group and the left end of the roller shaft in the corresponding spindle position. The right end of the second rotating bushing in the right rotating bushing group is also spaced from the right end of the roller shaft in the corresponding spindle position. The first rotating bushing is nested within the second rotating bushing. The left end of the first rotating bushing in the left rotating bushing group is aligned with the left end of the roller shaft in the corresponding spindle position. The space between the left ends of the first and second rotating bushings in the left rotating bushing group... The first rotating sleeve and the roller shaft are integrally fixedly connected. The first rotating sleeve of the left rotating sleeve group, located between the right end of the second rotating sleeve and the right end of the first rotating sleeve, maintains a certain gap with the second rotating sleeve. The right end of the second rotating sleeve of the left rotating sleeve group is located to the left of the right end of the first rotating sleeve and maintains a certain distance between them. The right end of the first rotating sleeve of the right rotating sleeve group is aligned with the right end of the roller shaft of the spindle position. The first rotating sleeve of the right rotating sleeve group, located between the right ends of the first rotating sleeve and the right end of the second rotating sleeve, is integrally fixedly connected with the roller shaft. The first rotating sleeve of the right rotating sleeve group, located between the left end of the second rotating sleeve and the left end of the first rotating sleeve, maintains a certain gap with the second rotating sleeve. The left end of the second rotating sleeve of the right rotating sleeve group is located to the right of the left end of the first rotating sleeve and maintains a certain distance between them.

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

4. The method for producing wrapped blended yarn according to claim 1, characterized in that: This includes the production of pure spun single yarn, pure spun Siro yarn, and wrapped blended Siro yarn.

5. The method for producing wrapped blended yarn according to claim 4, characterized in that: In the production of pure spun 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. Then it is held by the middle pressing and holding continuous conveying jaws and output. During this process, 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, resulting in a short fiber bundle with reduced linear density. The short fiber bundle is then held by the front middle pressing and holding continuous conveying jaws and output from the drafting system. During this process, 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, resulting in a short fiber sliver with reduced linear density. This completes the drafting action 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 Siro yarn, the first short fiber rovings, including the first left short fiber roving and the first right short fiber roving, which are unwound from the two roving tubes respectively, are gripped by the left and right sides of the rear center pressing grip continuous conveying nip and enter the drafting system. Alternatively, the second short fiber rovings, including the second left short fiber roving and the second right short fiber roving, which are unwound from the two roving tubes respectively, are gripped by the rear second pressing grip continuous conveying nip and the rear third pressing grip continuous conveying nip and enter the drafting system. At this time, the first left short fiber roving located behind the rear center pressing grip continuous conveying nip contacts the sleeve wall of the second rotating shaft of the left rotating shaft assembly of the rotating rear lower roller located on the right side at the rear arc point of the diameter that is horizontal with the first left short fiber roving. The first left short fiber roving held in front of the continuous conveying jaws contacts the sleeve wall of the second rotating sleeve of the left rotating shaft assembly of the rotating rear lower roller located on the right side, at the front arc point of the diameter that is horizontal with the first left short fiber roving. The first right short fiber roving held in front of the continuous conveying jaws, located in the rear middle pressing position, contacts the sleeve wall of the second rotating sleeve of the right rotating shaft assembly of the rotating rear lower roller located on the left side, at the rear arc point of the diameter that is horizontal with the first right short fiber roving. The first right short fiber roving held in front of the continuous conveying jaws, located in the rear middle pressing position, contacts the sleeve wall of the second rotating sleeve of the right rotating shaft assembly of the rotating rear lower roller located on the left side, at the front arc point of the diameter that is horizontal with the first right short fiber roving. Alternatively, the continuous conveying... The second left short fiber roving on the rear side of the jaws contacts the sleeve wall of the first rotating bushing of the left rotating bushing assembly of the rotating rear lower roller on the right side at the rear arc point of the diameter that is horizontal with the second left short fiber roving. The second left short fiber roving on the front side of the rear two pressing grip continuous conveying jaws contacts the sleeve wall of the first rotating bushing of the left rotating bushing assembly of the rotating rear lower roller on the right side at the front arc point of the diameter that is horizontal with the second left short fiber roving. The second right short fiber roving on the rear side of the rear two pressing grip continuous conveying jaws contacts the sleeve wall of the first rotating bushing of the right rotating bushing assembly of the rotating rear lower roller on the left side at the rear arc point of the diameter that is horizontal with the second right short fiber roving. The second right short fiber roving on the front side of the rear two pressing grip continuous conveying jaws... The short-fiber roving contacts the wall of the first rotating sleeve of the right rotating sleeve assembly of the rotating rear lower roller located on the left side at the front arc point of the diameter that is horizontal with the second right short-fiber roving. During the contact process, the rear arc point exerts an upward driving force on the short fibers in the first left, first right, or second left and second right short-fiber rovings under the action of friction, thereby achieving a uniform distribution of short fibers in the cross-section of the short-fiber rovings, thus achieving the upward processing of the short-fiber rovings. The front arc point exerts a downward driving force on the short fibers in the first left, first right, or second left and second right short-fiber rovings under the action of friction, thereby achieving a uniform distribution of short fibers in the cross-section of the short-fiber rovings.This then enables the finishing of short-fiber rovings; Then, the first left short fiber roving and the first right short fiber roving are respectively gripped and output through the left and right sides of the middle pressing and gripping continuous conveying jaws, or the second left short fiber roving and the second right short fiber roving are respectively gripped and output through the middle second pressing and gripping continuous conveying jaws and the middle third pressing and gripping continuous conveying jaws. This results in the first left short fiber roving and the first right short fiber roving being drafted in the lower rear drafting zone between the rear middle pressing and gripping continuous conveying jaws and the middle pressing and gripping continuous conveying jaws, resulting in the first left short fiber bundle and the first right short fiber bundle with reduced linear density. Alternatively, the second left short fiber roving is drafted in the left middle rear drafting zone between the rear second pressing and gripping continuous conveying jaws and the middle second pressing and gripping continuous conveying jaws, and the second right short fiber roving is drafted in the lower rear drafting zone between the rear third pressing and gripping continuous conveying jaws and the middle third pressing and gripping continuous conveying jaws. The drafting action in the right-middle-rear drafting zone between the conveying jaws produces 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 behind the middle pressing and gripping continuous conveying jaws contacts the sleeve wall of the second rotating bushing of the left rotating bushing assembly of the rotating middle-lower roller located on the right side at the rear arc point of the diameter that is horizontal with the first left short fiber roving. The first left short fiber bundle located in front of the middle pressing and gripping continuous conveying jaws contacts the sleeve wall of the second rotating bushing of the left rotating bushing assembly of the rotating middle-lower roller located on the right side at the front arc point of the diameter that is horizontal with the first left short fiber bundle. The first right short fiber roving located behind the middle pressing and gripping continuous conveying jaws contacts the first right short fiber bundle located in front of the right rotating bushing assembly of the rotating middle-lower roller located on the left side. The sleeve wall of the second rotating bushing contacts the first right short fiber bundle, which is horizontal with the diameter of the first right short fiber roving. The sleeve wall of the second rotating bushing of the right rotating bushing assembly of the rotating lower roller on the left side of the first right short fiber bundle contacts the first right short fiber bundle at the point of the arc of the diameter of the first right short fiber bundle. Alternatively, the sleeve wall of the first rotating bushing of the left rotating bushing assembly of the rotating lower roller on the right side of the second left short fiber roving, located behind the middle two pressing and holding continuous conveying jaws, contacts the second left short fiber bundle, which is horizontal with the diameter of the second left rotating bushing. The second right short fiber roving, located behind the continuous conveying jaws of the middle two pressing and gripping rollers, contacts the wall of the first rotating sleeve of the right rotating shaft assembly of the rotating lower roller on the left side at the rear arc point of the diameter that is horizontal with the second right short fiber roving. The second right short fiber roving, located in front of the continuous conveying jaws of the middle two pressing and gripping rollers, contacts the wall of the first rotating shaft assembly of the right rotating shaft assembly of the rotating lower roller on the left side at the front arc point of the diameter that is horizontal with the second right short fiber roving. During this contact, the rear arc point exerts an upward driving force on the short fibers within 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 frictional force.This achieves a uniform distribution of short fibers within the cross-section of the short fiber roving before drafting in the post-drafting zone, subsequently achieving an upward finishing of the short fiber roving. The forward arc point exerts a downward driving force on the short fibers within the first left and first right short fiber bundles, or the second left and second right short fiber bundles, under frictional force, thereby achieving a uniform distribution of short fibers within the cross-section of the short fiber bundles obtained from drafting in the post-drafting zone, subsequently achieving a downward finishing of the short fiber bundles. Then, the first left short fiber bundle and the first right short fiber bundle are respectively gripped and output through the left and right sides of the front-middle pressing grip continuous conveying jaws, or the second left short fiber bundle and the second right short fiber bundle are respectively gripped and output through the front-second pressing grip continuous conveying jaws and the front-third pressing grip continuous conveying jaws. This results in the first left short fiber bundle and the first right short fiber bundle being drawn in the lower front drawing zone between the middle pressing grip continuous conveying jaws and the front-middle pressing grip continuous conveying jaws, resulting in the first left short fiber sliver and the first right short fiber sliver with reduced linear density. Alternatively, the second left short fiber bundle is drawn in the left-middle front drawing zone between the middle-second pressing grip continuous conveying jaws and the front-second pressing grip continuous conveying jaws, and the second right short fiber bundle is drawn in the middle-third pressing grip continuous conveying jaws and the front-third pressing grip continuous conveying jaws. The drafting action in the right-middle front drafting zone between the conveying jaws produces a second left short fiber sliver and a second right short fiber sliver with reduced linear density. At this time, the first left short fiber bundle located behind the front-middle pressing grip continuous conveying jaws contacts the sleeve wall of the second rotating bushing of the left rotating bushing assembly of the rotating front lower roller located on the right side at the rear arc point of the diameter that is horizontal with the first left short fiber bundle. The first left short fiber sliver located in front of the front-middle pressing grip continuous conveying jaws contacts the sleeve wall of the second rotating bushing of the left rotating bushing assembly of the rotating front lower roller located on the right side at the front arc point of the diameter that is horizontal with the first left short fiber sliver. The first right short fiber bundle located behind the front-middle pressing grip continuous conveying jaws contacts the first right short fiber sliver located behind the right rotating bushing of the rotating front lower roller located on the left side. The sleeve wall of the second rotating bushing contacts the first right short fiber bundle at the rear arc point of the diameter that is horizontal with the first right short fiber bundle. The first right short fiber strand located on the front side of the front middle pressing grip continuous conveying jaws contacts the sleeve wall of the second rotating bushing assembly of the right rotating bushing group of the rotating front lower roller located on the left side at the front arc point of the diameter that is horizontal with the first right short fiber strand. Alternatively, the second left short fiber bundle located on the rear side of the front two pressing grip continuous conveying jaws contacts the sleeve wall of the first rotating bushing assembly of the left rotating bushing group of the rotating front lower roller located on the right side at the rear arc point of the diameter that is horizontal with the second left short fiber bundle. The sleeve wall of the second left short fiber strand located on the front side of the front two pressing grip continuous conveying jaws contacts the sleeve wall of the first rotating bushing assembly of the left rotating bushing group of the rotating front lower roller located on the right side. The first right short fiber bundle, located behind the front two pressing and gripping continuous conveying jaws, contacts the wall surface of the first rotating bushing of the right rotating bushing assembly of the rotating front lower roller on the left side at the rear arc point of the diameter that is horizontal with the second right short fiber bundle. The second right short fiber bundle, located in front of the front two pressing and gripping continuous conveying jaws, contacts the wall surface of the first rotating bushing of the right rotating bushing assembly of the rotating front lower roller on the left side at the front arc point of the diameter that is horizontal with the second right short fiber bundle. During this contact process, the rear arc point exerts an upward driving force on the short fibers within the first left short fiber bundle, the first right short fiber bundle, or the second left short fiber bundle and the second right short fiber bundle under frictional force.This achieves a uniform distribution of short fibers within the cross-section of the short fiber bundle before drafting in the front drafting zone, followed by upward processing of the short fiber bundle. The front arc point exerts a downward driving force on the short fibers within the first left short fiber sliver, first right short fiber sliver, or second left short fiber sliver, second right short fiber sliver under frictional force, thereby achieving a uniform distribution of short fibers within the cross-section of the short fiber sliver obtained from drafting in the front drafting zone, followed by downward processing of the short fiber sliver.

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 rovings, including the first left short fiber roving and the first right short fiber roving, which are unwound from the two roving tubes respectively, are gripped by the left and right sides of the rear middle pressing grip continuous conveying nip and enter the drafting system. Simultaneously, the second short fiber rovings, including the second left short fiber roving and the second right short fiber roving, which are unwound from the two roving tubes respectively, are gripped by the rear second pressing grip continuous conveying nip and the rear third pressing grip continuous conveying nip and enter the drafting system. At the same time, the third short fiber rovings, including the third left short fiber roving and the third right short fiber roving, which are unwound from the two roving tubes respectively, are gripped by the rear first pressing grip continuous conveying nip and the rear fourth pressing grip continuous conveying nip and enter the drafting system. At this time, the first left short fiber roving is sequentially subjected to the upper finishing action of the sleeve wall of the left rotating shaft sleeve group of the rear lower roller before being gripped, and then subjected to the upper finishing action of the sleeve wall of the rear lower roller after being gripped. The first right short fiber roving is subjected to the downward finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating sleeve of the rear lower roller contacting it before being grasped, and the downward finishing action of the sleeve wall surface of the second rotating sleeve of the right rotating sleeve of the rear lower roller contacting it after being grasped. The second left short fiber roving is subjected to the upward finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve of the rear lower roller contacting it before being grasped, and the downward finishing action of the sleeve wall surface of the first rotating sleeve of the left rotating sleeve of the rear lower roller contacting it after being grasped. The second right short fiber roving is subjected to the upward finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve of the rear lower roller contacting it before being grasped, and the downward finishing action of the sleeve wall surface of the first rotating sleeve of the right rotating sleeve of the rear lower roller contacting it after being grasped. Then, the first left short fiber roving and the first right short fiber roving are respectively gripped and output through the left and right sides of the middle pressing and gripping continuous conveying jaws. During this process, the drafting action in the lower rear drafting zone between the rear middle pressing and gripping continuous conveying jaws and the middle pressing and gripping continuous conveying jaws results in the first left short fiber bundle and the first right short fiber bundle with reduced linear density. At the same time, the second left short fiber roving and the second right short fiber roving are respectively gripped and output through the middle second pressing and gripping continuous conveying jaws and the middle third pressing and gripping continuous conveying jaws. During this process, the left middle rear drafting zone and the rear third pressing and gripping zone between the rear second pressing and gripping continuous conveying jaws and the middle second pressing and gripping continuous conveying jaws... The drafting action in the right-middle rear drafting zone between the continuous conveying jaws and the middle three-press grip continuous conveying jaws produces a second left short fiber bundle and a second right short fiber bundle with reduced linear density. Simultaneously, the third left short fiber roving and the third right short fiber roving are gripped and output through the middle one-press grip continuous conveying jaws and the middle four-press grip continuous conveying jaws, respectively. During this process, the drafting action in the upper left rear drafting zone between the rear one-press grip continuous conveying jaws and the middle one-press grip continuous conveying jaws, and the upper right rear drafting zone between the rear four-press grip continuous conveying jaws and the middle four-press grip continuous conveying jaws, produces a third left short fiber bundle and a third right short fiber bundle with reduced linear density. The right short fiber bundle, at this time, the first left short fiber roving is subjected to an upward shaping action by the sleeve wall surface of the second rotating shaft of the left rotating shaft assembly of the middle and lower roller before being grasped, and the first left short fiber sliver obtained after being grasped is subjected to a downward shaping action by the sleeve wall surface of the second rotating shaft of the left rotating shaft assembly of the middle and lower roller before being grasped, and the first right short fiber roving is subjected to an upward shaping action by the sleeve wall surface of the second rotating shaft of the right rotating shaft assembly of the middle and lower roller before being grasped, and the first right short fiber sliver obtained after being grasped is subjected to a downward shaping action by the sleeve wall surface of the second rotating shaft of the right rotating shaft assembly of the middle and lower roller before being grasped. The second left short fiber roving is subjected to an upward finishing action by the sleeve wall of the first rotating sleeve of the left rotating sleeve group of the middle and lower roller before being gripped, and a downward finishing action by the sleeve wall of the first rotating sleeve of the left rotating sleeve group of the middle and lower roller after being gripped. The second right short fiber roving is subjected to an upward finishing action by the sleeve wall of the first rotating sleeve of the right rotating sleeve group of the middle and lower roller before being gripped, and a downward finishing action by the sleeve wall of the first rotating sleeve of the right rotating sleeve group of the middle and lower roller after being gripped. Then, the first left short fiber sliver and the first right short fiber sliver are respectively gripped and output through the left and right sides of the front-middle pressing grip continuous conveying jaws. During this process, the drafting action in the lower front drafting zone between the middle pressing grip continuous conveying jaws and the front-middle pressing grip continuous conveying jaws results in the first left short fiber sliver and the first right short fiber sliver with reduced linear density. Simultaneously, the second left short fiber sliver and the second right short fiber sliver are respectively gripped and output through the front second pressing grip continuous conveying jaws and the front third pressing grip continuous conveying jaws. During this process, the left-middle front drafting zone and the middle third pressing grip between the middle second pressing grip continuous conveying jaws and the front second pressing grip continuous conveying jaws are respectively gripped and output. The drafting action in the right-middle-front drafting zone between the continuous conveying jaws and the first three pressing grip continuous conveying jaws produces a second left short fiber sliver and a second right short fiber sliver with reduced linear density. Simultaneously, the third left short fiber sliver and the third right short fiber sliver are respectively gripped and output by the first pressing grip continuous conveying jaws and the first four pressing grip continuous conveying jaws. During this process, the drafting action in the upper left-front drafting zone between the middle pressing grip continuous conveying jaws and the first pressing grip continuous conveying jaws, and the upper right-front drafting zone between the middle four pressing grip continuous conveying jaws and the first four pressing grip continuous conveying jaws, produces a third left short fiber sliver and a third right short fiber sliver with reduced linear density. The first left short fiber sliver, before being grasped, is subjected to an upward shaping action from the wall surface of the second rotating sleeve of the left rotating sleeve assembly of the front lower roller. After being grasped and drawn, the first left short fiber sliver is subjected to a downward shaping action from the wall surface of the second rotating sleeve of the left rotating sleeve assembly of the front lower roller. Similarly, the first right short fiber sliver, before being grasped, is subjected to an upward shaping action from the wall surface of the second rotating sleeve of the right rotating sleeve assembly of the front lower roller. After being grasped and drawn, the first right short fiber sliver is subjected to a downward shaping action from the wall surface of the second rotating sleeve of the right rotating sleeve assembly of the front lower roller. The second left short fiber strip is subjected to an upward conditioning action from the sleeve wall surface of the first rotating sleeve of the left rotating sleeve assembly of the front lower roller before being gripped, and to a downward conditioning action from the sleeve wall surface of the first rotating sleeve of the left rotating sleeve assembly of the front lower roller after being gripped. The second right short fiber strip is subjected to an upward conditioning action from the sleeve wall surface of the first rotating sleeve of the right rotating sleeve assembly of the front lower roller before being gripped, and to a downward conditioning action from the sleeve wall surface of the first rotating sleeve of the right rotating sleeve assembly of the front lower roller after being gripped.

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 sliver output from the drafting system is twisted by the twisting twisting system of the spinning frame to obtain the final pure spun single yarn. The pure spun single 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, which in turn drives the spinning tube to rotate. The rotation of the spinning tube then drives the pure spun single yarn to pass through the guide hook and the traveler in sequence and wind onto the spinning tube. This causes the traveler to rotate around the ring. At this time, because the pure spun single yarn has a flexible structure and because of the weight of the traveler 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 the twisting twist, which 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 desired pure spun single yarn.

9. The method for producing wrapped blended yarn according to claim 6, characterized in that: In the production of pure Siro yarn, the first left and first right short fiber slivers or the second left and second right short fiber slivers output from the drafting system are twisted by the twisting twist transmitted from the spinning frame's twisting system to obtain pure Siro yarn. The pure Siro yarn is wound onto the spinning bobbin in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate via the spindle belt, which in turn drives the spinning bobbin to rotate. The rotation of the spinning bobbin then causes the pure Siro yarn to pass sequentially through the guide hook and traveler, winding onto the spinning bobbin. This causes the traveler to rotate around the ring. At this time, due to the pure Siro yarn... The winding structure is flexible, and due to the weight of the traveler, the winding speed of pure spun Siro yarn on the yarn bobbin is less than the rotation speed of the bobbin. This speed difference generates twist, which is transmitted from bottom to top. When it reaches the lower twisting point, it continues to be transmitted separately along the directions of the first left short fiber sliver and the first right short fiber sliver, or the second left short fiber sliver and the second right short fiber sliver. This causes the first left short fiber sliver or the second left short fiber sliver to twist under the influence of the transmitted first sub-twist, resulting in the first left yarn or the second left yarn, and the first right short fiber sliver... The first right short fiber sliver or the second right short fiber sliver is twisted under the action of the transmitted second twist to obtain the first right yarn or the second right yarn. The first left yarn and the first right yarn are twisted at the lower twist point under the action of the transmitted twist to obtain the final first Siro yarn. Alternatively, the second left yarn and the second right yarn are twisted at the lower twist point under the action of the transmitted twist to obtain the final second Siro yarn. At this time, because the distance between the first left short fiber sliver and the first right short fiber sliver is greater than the distance between the second left short fiber sliver and the second right short fiber sliver, the first right yarn is twisted along the first left short fiber sliver. The sub-twist is greater than the first sub-twist transmitted along the second left short fiber sliver, making the second sub-twist transmitted along the second left short fiber sliver greater than the second sub-twist transmitted along the second right short fiber sliver. Consequently, the twist of the first left sub-yarn and the first right sub-yarn is greater than the twist of the second left sub-yarn and the second right sub-yarn. At the same time, the winding twist of the first left sub-yarn and the first right sub-yarn in the first Siro yarn is less than the winding twist of the second left sub-yarn and the second right sub-yarn in the second Siro yarn. Consequently, the layering and plying phenomenon in the first Siro yarn is less than that in the second Siro 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 short fiber slivers (including the first left and first right short fiber slivers), the second pair of short fiber slivers (including the second left and second right short fiber slivers), and the third pair of short fiber slivers (including the third left and third right short fiber slivers) output by the drafting system are spatially stacked in a bottom, middle, and top manner. Under the action of the twisting twist transmitted by the spinning machine twisting system, the first pair of short fiber slivers twists together to form the inner layer yarn, the second pair of short fiber slivers twists together and simultaneously spatially wraps the first pair of short fiber slivers to form the middle layer yarn, and the third pair of short fiber slivers twists together and simultaneously spatially wraps the first and second pairs of short fiber slivers to form the outer layer yarn. Finally, the desired wrapped blended yarn is obtained through twisting, and the wrapped blended yarn is wound onto the yarn bobbin in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate via the spindle belt, which in turn drives the yarn bobbin to rotate. The rotation of the yarn bobbin then drives the wrapped blended yarn to pass through the guide hook and the traveler in sequence and wind onto the yarn bobbin, causing the traveler to rotate around the ring. At this time, due to the flexible structure of the wrapped blended yarn and the weight of the traveler itself, the winding speed of the wrapped blended yarn on the yarn bobbin is less than the rotation speed of the yarn bobbin. The speed difference between the two generates the twist, which is transmitted from bottom to top. When it reaches the lower twisting point, it continues to be transmitted along the first left short fiber sliver and the first right short fiber sliver, respectively. The second left short fiber sliver and the second right short fiber sliver, the third left short fiber sliver, and the third right short fiber sliver are transmitted in separate directions. This causes the first left short fiber sliver to twist under the transmitted first left twist to form the first left yarn, and the first right short fiber sliver to twist under the transmitted first right twist to form the first right yarn. Simultaneously, the first left and first right yarns twist and intertwine at the lower inner twist point to form the inner layer yarn. Similarly, the second left short fiber sliver twists under the transmitted second left twist to form the second left yarn, and the second right short fiber sliver twists under the transmitted second right twist to form the second right yarn. Simultaneously, the second left and second right yarns twist and intertwine at the lower middle twist point to form the middle layer yarn. The yarn, and the second left yarn and the second right yarn, wrap the inner layer yarn during the twisting and winding process at the middle and lower twisting point, thus obtaining the middle inner layer wrapped yarn. The middle and lower twisting point is located in front of and below the inner lower twisting point. The third left short fiber sliver twists under the action of the third left twist transmitted to obtain the third left yarn, and the third right short fiber sliver twists under the action of the third right twist transmitted to obtain the third right yarn. At the same time, the third left yarn and the third right yarn twist and wind each other at the outer lower twisting point to form the outer layer yarn. During the twisting and winding process at the outer lower twisting point, the third left yarn and the third right yarn wrap the middle inner layer wrapped yarn, thus obtaining the final wrapped blended yarn. The outer lower twisting point is located in front of and below the middle lower twisting point.

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