CN109097882B - Production method of high-elastic composite yarn - Google Patents

Production method of high-elastic composite yarn Download PDF

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Publication number
CN109097882B
CN109097882B CN201811169900.3A CN201811169900A CN109097882B CN 109097882 B CN109097882 B CN 109097882B CN 201811169900 A CN201811169900 A CN 201811169900A CN 109097882 B CN109097882 B CN 109097882B
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cotton
roller
polyester
rotating speed
yarn
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CN109097882A (en
Inventor
张娣
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ANHUI HANLIAN COLOUR SPIN Co.,Ltd.
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Anhui Hanlian Colour Spin Co ltd
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/01—Natural vegetable fibres
    • D10B2201/02—Cotton
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The invention provides a production method of high-elastic composite yarn, which comprises the steps of controlling transmission by a single motor through a front roller of a spinning frame, controlling transmission by a single motor through a middle roller through a single motor, controlling transmission by a single motor through a gear between the middle roller and a rear roller, feeding short fiber roving through the rear roller, outputting the short fiber sliver through the front roller after drafting in a drafting zone, respectively feeding two filaments through the front rollers positioned at the left side and the right side of the short fiber sliver to wrap the short fiber sliver, feeding one filament through the front roller positioned right above the short fiber sliver to be wrapped by the short fiber sliver, changing the linear density of the short fiber sliver, the twist degree of the short fiber sliver and the wrapping twist degree of the two filaments on the short fiber sliver by changing the rotating speed of the front roller during spinning, then changing the linear density of the composite yarn, realizing the slub effect, and simultaneously changing the combination mode between the two wrapping filaments and one core-spun filament and the short fiber, the production of the filament and staple fiber composite slub yarns with various different styles is realized.

Description

Production method of high-elastic composite yarn
Technical Field
The invention relates to the field of new spinning technologies, in particular to a production method of high-elasticity composite yarn.
Background
With the increasing development of social economy and the continuous improvement of the living standard of people, the consumption concept of people is continuously updated, the requirements on the functionality and the serviceability of the clothes are higher and higher, and the requirements on the aspects of antibiosis, health care, hand feeling quality and the like of the clothes are continuously improved; on the other hand, with the development of economy, the application fields of various functional fibers and textiles are gradually expanded. Therefore, the development of fiber materials having various special functions is receiving more and more attention, and the kinds of functional fiber materials are also more and more complete. However, the performance of various functional fibers is often single, for example, bamboo charcoal fibers have excellent antibacterial performance, but have poor handfeel, skin-friendliness, cohesive force and spinnability, so that functional textiles with comprehensive performance need to be blended by multiple fibers, how to select fibers of different varieties and different proportions to be fully and uniformly mixed, and what spinning process is adopted to spin functional high-quality yarns with excellent performance, which is a problem to be solved urgently at present.
In the invention, the high-elasticity composite yarn is produced by compounding the filaments and the short fibers, a front roller of a spinning frame adopts independent motor control transmission, a middle roller adopts independent motor control transmission and is in gear transmission with the rear roller, short fiber roving is fed by the rear roller, is output by the front roller after being drafted in a drafting zone to obtain short fiber strands, two filaments are respectively fed by the front rollers positioned at the left side and the right side of the short fiber strands to wrap the short fiber strands, one filament is fed by the front roller positioned right above the short fiber strands to be wrapped by the short fiber strands, the linear density of the short fiber strands, the twisting twist degree of the short fiber strands and the wrapping twist degree of the two filaments to the short fiber strands are changed during spinning by changing the rotating speed of the front roller, the linear density of the spun filament and short fiber composite yarn is changed, and the slub effect is realized, meanwhile, the combination mode between two wrapping filaments and one core-spun filament and short fiber strand is changed, so that the production of the filament and short fiber composite slub yarns in various different styles is realized, and the added value of the product is greatly improved.
Disclosure of Invention
The invention aims to provide a production method of a high-elasticity composite yarn in a mode of compounding filaments and short fibers, which changes the linear density of short fiber strands, the twisting degree of the short fiber strands and the wrapping degree of the two filaments to the short fiber strands by changing the rotating speed of a front roller, changes the linear density of the spun composite yarn, realizes a slub effect, and changes the combination mode of two wrapped filaments, one core-spun filament and the short fiber strands, thereby realizing the production of composite slub yarns with various styles and greatly improving the added value of products.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a production method of high-elastic composite yarn, the composite yarn includes a spun yarn, a covering filament, two wrap filament, a spun yarn, a covering filament, two combination modes of wrap filament include three along the length direction of the composite yarn, firstly, when the linear density of the spun yarn is greater than twice of the linear density of the covering filament, the covering filament is totally wrapped by the spun yarn to obtain the inner wrapping filament, two wrap filaments wrap the outside of the inner wrapping yarn at the same time; when the linear density of the spun yarn is between one time and two times of that of the core-spun filament, the spun yarn is wound on the core-spun filament to obtain an inner wrapping yarn, the core-spun filament is kept vertical, and the two wrapping filaments are wrapped outside the inner wrapping yarn at the same time; thirdly, when the linear density of the spun yarn is smaller than that of the core-spun filament, the spun yarn and the core-spun filament are arranged in parallel to obtain an inner parallel yarn, and the two wrapping filaments wrap the outer part of the inner parallel yarn at the same time; and the twist of the spun yarn is in inverse proportion to the linear density of the spun yarn and in direct proportion to the wrapping twist of the two wrapping yarns, wherein the spun yarn is polyester-cotton blended yarn, the core-spun filament is XLA polyolefin elastic fiber filament, and the two wrapping filaments are T400 filament, and the method specifically comprises the following steps:
the first step is as follows: cotton blending is carried out on cotton with production places of Acksu, Usu, Zhijiang and Changjie according to the proportion of 5:2:2:1, cotton fibers are subjected to a first blowing-carding unit, a first pre-drawing, lap and combing process to prepare combed cotton slivers, polyester fibers with the production place of Yuzheng production line with the batch number of 8k and the production line batch number of 32k are mixed according to the proportion of 1:9, polyester slivers are prepared from the polyester fibers through a second blowing-carding unit and a second pre-drawing, polyester cotton hybrid slivers are prepared from the prepared combed cotton slivers and the polyester slivers through a drawing process, wherein the drawing process comprises a first drawing process, a second drawing process and a last drawing process, the combed cotton slivers and the polyester slivers are mixed in the first drawing process, and then the polyester cotton hybrid slivers are prepared into polyester cotton hybrid roving through a roving process;
the second step is that: polyester-cotton mixed roving, an XLA polyolefin elastic fiber filament and two T400 filaments are subjected to a spinning process together to prepare composite yarn, wherein the spinning process adopts a ring spinning frame, a drafting mechanism of the ring spinning frame comprises a rear roller pair consisting of a rear roller and a rear rubber covered roller, a middle roller pair consisting of a middle roller and a middle rubber covered roller, and a front roller pair consisting of a front roller and a front rubber covered roller, the front roller is driven to rotate by a first motor, the middle roller is driven to rotate by a second motor, the middle roller and the rear roller are in gear connection transmission, a main shaft spindle is driven to rotate by a third motor, a steel collar plate is driven to lift by a fourth motor, the polyester-cotton mixed roving is fed by the rear roller and the rear rubber covered roller of the rear roller pair, then is pressed and output by the middle roller and the middle rubber covered roller of the middle roller pair and is subjected to the drafting action of a rear drafting zone formed by the rear roller pair and the, then the polyester cotton mixed fiber is output through the pressing between a front roller and a front rubber roller of a front roller pair under the drafting action of a front drafting zone formed between a middle roller pair and a front roller pair, finally the polyester cotton mixed fiber strip is output through a front jaw between the front roller pair and a front rubber roller, two T400 filaments are respectively output through the front jaw between the front roller pair and the front rubber roller after being pressed between the front roller pair and the front rubber roller after passing through a yarn guide device, the two T400 filaments are symmetrically distributed on the front jaws positioned at the left side and the right side of the polyester cotton mixed fiber strip, one XLA polyolefin elastic fiber filament is output through the front jaw between the front roller pair and the front rubber roller after being pressed between the front roller pair and the front rubber roller after passing through a core yarn feeding device, and is fed through the front jaw between the front roller positioned right above the polyester cotton mixed fiber strip, so that the XLA polyolefin elastic fiber filament and the polyester cotton mixed fiber strip are output through the front jaw together, during spinning, the rotating speeds of the second motor, the third motor and the fourth motor are kept unchanged, so that the rotating speed of the middle roller, the rotating speed of the spindle and the lifting speed of the ring plate are kept unchanged, at the moment, the draft multiple d1 of the rear draft zone is equal to the rotating speed of the middle roller/the rotating speed of the rear roller, d1 is determined by a gear between the middle roller and the rear roller, the draft multiple d2 of the front draft zone is equal to the rotating speed of the front roller/the rotating speed of the middle roller is equal to the rotating speed of the first motor/the rotating speed of the second motor, the linear density of the polyester-cotton mixed fiber is equal to the linear density of the polyester-cotton mixed roving/(d 1 × d2), and the rotating speed of the first motor is set to comprise three states: firstly, make the linear density of the mixed whisker strip of polyester-cotton be greater than the twice of XLA polyolefin elastic fiber filament's linear density, also satisfy: the first motor rotating speed is less than the second motor rotating speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 multiplied by 2 multiplied by the linear density of the XLA polyolefin elastic fiber filament), at this time, because the linear density of the polyester-cotton mixed sliver is more than twice of the linear density of the XLA polyolefin elastic fiber filament, and because the twist of the polyester-cotton mixed sliver is the spindle rotating speed/the front roller rotating speed/the third motor rotating speed/the first motor rotating speed, the twist of the polyester-cotton mixed sliver is larger and increases along with the reduction of the first motor speed, thereby on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the action of the twist to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is continuously wrapped in the process of the polyester-cotton mixed sliver, so that the XLA polyolefin elastic fiber filament is completely wrapped in the polyester-cotton mixed spun yarn, then obtaining the inner covering yarn, and simultaneously, keeping a certain distance between the polyester-cotton mixed fiber strips and the T400 filament and polyester-cotton mixed fiber strips on the left side and the right side at the front jaw and fixedly connecting the polyester-cotton mixed fiber strips and the polyester-cotton mixed fiber strips under the front jaw, so that the two T400 filaments on the left side and the right side are driven to wrap the surface of the inner covering yarn simultaneously in the twisting process of the polyester-cotton mixed fiber strips, and then obtaining a roving section of the composite yarn; secondly, the linear density of the polyester-cotton mixed fiber strand is between one time and two times of the linear density of XLA polyolefin elastic fiber filaments, and the following requirements are met: the second motor rotation speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 × 2 × XLA polyolefin elastic fiber filament linear density) < the first motor rotation speed < the second motor rotation speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 × XLA polyolefin elastic fiber filament linear density), at this time, because the linear density of the polyester-cotton mixed sliver is between one time and two times of the linear density of the XLA polyolefin elastic fiber filament, and because the twist of the polyester-cotton mixed sliver is equal to the spindle rotation speed/the front roller rotation speed equal to the third motor rotation speed/the first motor rotation speed, the twist of the polyester-cotton mixed sliver is centered and decreases with the increase of the first motor speed, so that on one hand, the polyester-cotton mixed sliver is continuously twisted into a yarn under the twisting action of the twist to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is not enough to be wrapped in the twisting process of the polyester-cotton mixed sliver, the polyester-cotton mixed spun yarn is continuously wrapped on the XLA polyolefin elastic fiber filament to obtain an internally wrapped yarn, the XLA polyolefin elastic fiber filament is kept vertical, and meanwhile, as the T400 filament and the polyester-cotton mixed filament strips positioned on the left side and the right side keep a certain distance from each other at the front jaw and are fixedly connected with each other below the front jaw, the two T400 filament strips on the left side and the right side are driven to be simultaneously wrapped on the surface of the internally wrapped yarn in the twisting process of the polyester-cotton mixed filament strips, and then a middle yarn section of the composite yarn is obtained; thirdly, the linear density of the polyester-cotton mixed fiber strand is smaller than that of XLA polyolefin elastic fiber filaments, namely, the linear density meets the following requirements: the first motor rotating speed is greater than the second motor rotating speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 multiplied by 2 multiplied by the linear density of the XLA polyolefin elastic fiber filament), at this time, because the linear density of the polyester-cotton mixed sliver is less than the linear density of the XLA polyolefin elastic fiber filament, and because the twisting twist of the polyester-cotton mixed sliver is equal to the spindle rotating speed/the front roller rotating speed is equal to the third motor rotating speed/the first motor rotating speed, the twisting twist of the polyester-cotton mixed sliver is smaller and is reduced along with the increase of the first motor speed, so that on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the twisting action of the twisting degree to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is not enough to be wrapped in the twisting process of the polyester-cotton mixed sliver, so that the polyester-cotton mixed spun yarn and the XLA polyolefin elastic fiber filament are kept parallel, and then the inner parallel yarn is obtained, meanwhile, the T400 filaments and the polyester-cotton mixed sliver on the left side and the right side keep a certain distance from each other at the position of the front jaw and are fixedly connected with each other below the front jaw, so that the two T400 filaments on the left side and the right side are driven to wrap the surface of the inner wrapped yarn simultaneously in the twisting process of the polyester-cotton mixed sliver, and then the spun yarn section of the composite yarn is obtained.
The technical scheme of the invention for further perfecting the process is as follows:
the optimized first blowing-carding unit sequentially selects an FA003 type disc type plucker-SFA 035E mixed opener-FA 106E type card wire beater opener-YQ 600H foreign fiber clearing machine-SF 161A vibration cotton feeder-A076F single beater scutcher-FA 231C type cotton carding machine, the FA003 type disc type plucker ensures that the cotton grabbing amount of each tooth of a cotton grabbing beater blade of the disc type plucker is slightly mastered according to the principle of fine cotton grabbing, the rotation speed of a trolley is 2.36r/min, the cotton grabbing beater speed 940r/min, the blade extending rib distance is 2.5mm-7.5mm adjustable, and the beater intermittent descending distance is 3.25 mm/time; the SFA035E mixing and opening machine feeds the raw materials grabbed by the automatic plucker through the suction of the condenser, and performs mixing, high opening and impurity removal treatment, the impurity removal rate is high, the speed of a cotton conveying curtain is set to be 1.15m/min, the speed of a cotton pressing curtain is set to be 1.15m/min, the speed of a corner nail curtain is set to be 89m/min, the rotating speed of a first U-shaped beater is 505r/min, the rotating speed of a second U-shaped beater is set to be 600r/min, the rotating speed of a porcupine beater is set to be 800r/min, and the rotating speed of a nose beater is set to be 866; the FA106 type carding wire beater scutcher further opens and removes impurities from the primarily opened chemical fibers, the diameter of a carding wire roller is 600mm, the rotating speed is 540r/min, the diameter of a cotton feeding roller is 76mm, the rotating speed is 45r/min, the mounting angle of the carding wire roller beater is 65 degrees, the SFA161A further opens, mixes and processes the raw cotton of various grades sent by a cotton distributor or the chemical fibers below 76mm into uniform banners, the banners are fed into a lap former to be made into cotton rolls, the vibration frequency of a vibration plate is set to be adjustable between 82 and 205 times/min, the corner nail curtain speed is 54m/min, the flat curtain speed is 8m/min, the rotating speed of the cotton feeding roller is 5.81r/min, the diameter is 200mm, the spacing between the cotton homogenizing roller and an inclined curtain is set to be adjustable between 0 and 40mm, and the photoelectric delay action time is set to be adjustable between 2 and 5 s; A076F single beater scutcher is suitable for processing various raw cottons and various chemical fibers below 76mm, further opening and removing impurities from the fibers, and making into cotton rolls for carding machines, wherein the speed of a cotton conveying roller is 2.00-4.35m/min, the rotating speed of a balance roller is 11.94r/min, the rotating speed of a comprehensive beater is 1000r/min, the rotating speed of a fan is 1460r/min, the rotating speed of a cotton roll roller is 12r/min, the dry weight of the cotton roll is 400g/m, the wet weight of the cotton roll is 432g/m, the length of the cotton roll is 42m, the elongation of the cotton roll is 2.86%, the actual length of the cotton roll is 43.2m, the clean weight of the cotton roll is 17.28kg, and the wet net weight of the cotton roll is 18; the FA231C type carding machine is provided with a licker-in-cylinder gauge of 6mm, a licker-in-small leakage bottom inlet and outlet gauge of 31mm and 22mm, a licker-in-pre-carding plate gauge of 60mm, a cylinder-large leakage bottom inlet and outlet gauge of 178mm and 31mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 22mm respectively, a cylinder-rear fixed cover plate gauge of 17 mm, 18mm and 19mm, a cylinder cover plate gauge of 13mm, 11 mm and 13mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 11 mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm;
the first pre-drawing adopts an FA306A drawing frame, a JSF 360 drawing frame is adopted in a sliver lap, the FA306A drawing frame adjusts the distance between the front roller holding point and the rear roller holding point according to the quality and the length of a fiber to be spun, a roller gauge is used for adjusting, a roller gauge is used for threading a required roller gauge sheet on the roller A, then a core rod is placed on the surface of the roller, a roller seat is moved to enable the surface of the roller to be tightly attached to the gauge sheet, the left eye and the right eye are simultaneously checked, the parallelism between two rollers is facilitated, the roller gauge is 10mm, the rear roller gauge is 16mm, the diameter of a pressure rod adjusting ring is 13mm, a horn head aperture factory adopts 3.4mm, the cotton sliver dry weight is set to be 14.03g/m, the mechanical draft is 6.452 times, the actual draft is 6.387 times, the roller center distances are respectively 50mm and 51mm, and the combined number is 6; through the pre-drawing process, the sliver lap is taken as a preparation process of combing, and the preparation process provides good straightening parallelism, accurate quantification, compact winding, neat edge, uniform longitudinal and transverse directions, no roll sticking, large-package fiber small lap, 47.43g/m of cotton lap dry quantification, 300m of small lap length, 1.384 times of mechanical drafting, 1.42 times of actual drafting, 85r/min of production speed, 24 doubling numbers, 1.34 times of main drafting, 1.032 times of back drafting and 42bar of leather roller pressurization for a combing machine;
in combing, a JSF388 comber is adopted, the lap produced by pre-drawing and sliver lapping of the raw sliver of the carding machine is combed, short fibers below 16mm in the lap are removed, neps, impurities and fiber defects are removed, the straightening parallelism and the regularity of fibers in the surface sliver are improved, necessary cohesive force is provided among the fibers, the yarn has good luster and high strength; setting the cotton combing evenness ration to be 14.12g/5m, the cylinder to be 200 times/min, feeding cotton in a cotton feeding mode to retreat, the cotton feeding length to be 4.7mm, the cotton doffing rate to be 17 percent, the carding spacing to be 0.4mm, and the pressure of a leather roller to be 5 bar;
in the second blowing-carding unit, an FA003 type disc type plucker, an SFA035E mixed opener, an FA106E gill needle beater opener, an SF161A vibration cotton feeder, an A076F single beater scutcher, an FA201B cotton carding machine are sequentially selected, the FA003 type disc type plucker is set to have the rotation speed of a trolley of 2.36r/min, the speed of a beater of 940r/min, the distance of a blade extending out of a rib of 2.5mm-7.5mm and the intermittent descending distance of the beater of 3.25 mm/time; the SFA035E mixed cotton opener is set to have a cotton conveying curtain speed of 1.15m/min, a cotton pressing curtain speed of 1.15m/min, a brad curtain speed of 89m/min, a first U-shaped beater rotation speed of 505r/min, a second U-shaped beater rotation speed of 600r/min, a porcupine beater rotation speed of 800r/min and a nose beater rotation speed of 866 r/min; the FA106 type carding wire beater scutcher is provided with a carding wire roller with the diameter of 600mm, the rotating speed of 540r/min, the diameter of a cotton feeding roller with the diameter of 76mm, the rotating speed of 45r/min and the mounting angle of a carding wire roller beater of 65 degrees, an SFA161A set vibrating plate vibration frequency of 82-205 times/min adjustable, a corner nail curtain speed of 54m/min, a flat curtain speed of 8m/min, the rotating speed of a cotton feeding roller of 5.81r/min, the diameter of 200mm, a spacing between a cotton homogenizing roller and an inclined curtain of 0-40mm adjustable, and photoelectric delay action time of 2-5s adjustable; A076F single beater scutcher is provided with a cotton conveying roller speed of 2.00-4.35m/min, a balance roller rotating speed of 11.94r/min, a comprehensive beater rotating speed of 900r/min, a fan rotating speed of 1460r/min, a cotton lap roller rotating speed of 12r/min, a polyester lap dry weight of 398g/m, a polyester lap wet weight of 400.39g/m, a polyester lap length of 36m, a polyester lap elongation of-1.93%, a polyester lap actual length of 35.5m, a polyester lap clean weight of 14.09kg and a polyester lap wet clean weight of 14.21 kg; the FA231B type carding machine is provided with a licker-in-cylinder gauge of 7mm, a licker-in-small leakage bottom inlet and outlet gauge of 40mm and 24mm, a licker-in-pre-carding plate gauge of 59mm, a cylinder-large leakage bottom inlet and outlet gauge of 63mm and 22mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 31mm respectively, a cylinder-rear fixed cover plate gauge of 18mm, 17 mm and 16mm, a cylinder cover plate gauge of 12mm, 10mm and 12mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 12mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm;
in the second pre-drawing process, an FA306A drawing frame is adopted, the gauge of a front region roller is 10mm, the gauge of a rear region roller is 16mm, the diameter of a pressure bar adjusting ring is 13mm, 3.4mm is adopted in the production of a trumpet head aperture factory, the cotton yarn quantity is set to be 17.37g/m, the mechanical drafting is 7.059 times, the actual drafting is 6.988 times, the roller center distance is respectively 50mm and 51mm, and the number of combined cotton yarns is 7;
an FA306A drawing frame is adopted in drawing, and comprises a first drawing frame, a second drawing frame and a last drawing frame, wherein the quantity of the slivers in the first drawing frame is 16.44g/5m, the mechanical drafting is 7.937 times, the actual drafting is 7.86 times, the roller spacing distances are respectively 10mm and 16mm, the roller center distances are respectively 50mm and 51mm, the horn caliber is 3.0mm, 5 polyester strips and 3 combed cotton slivers are adopted for feeding, the output speed of a compression roller is 256.8m/min, and the frequency conversion control of a belt pulley is realized; the quantitative quantity of the sliver in the second drawing is 16.39g/5m, the mechanical drawing is 6.082 times, the actual drawing is 6.02 times, the roller gauge is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.2mm, the mixed sliver obtained by 6 head drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out; the quantitative quantity of the sliver in the last drawing is 16.2g/5m, the mechanical drawing is 6.131 times, the actual drawing is 6.07 times, the roller space distance is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.4mm, the mixed sliver obtained by 6 secondary drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out;
an JWF1415 type roving machine is adopted in roving, the dry weight of the roving is set to be 5.02g/10m, the mechanical draft is set to be 6.59 times, the actual draft is 6.46 times, the roller space distances are respectively 12mm, 28mm and 35mm, the roller center distances are respectively 40mm, 54.5mm and 61.5mm, the twist number is 3.3637 twist/m, the jaw space distance is 7.5mm, the rotating speed of a front roller is 304r/min, and the rotating speed of a spindle is 900 r/min;
the spun yarn adopts an EJM128K type spinning machine additionally provided with a core-spun yarn device and a yarn guide device, and is provided with a spindle rotating speed of 15262r/min, a jaw space of 3.5mm, a ring diameter of 42mm, roller spaces of 18mm and 25mm respectively and roller center distances of 43mm and 50mm respectively.
The invention provides a method for producing high-elasticity composite yarn by compounding filaments and short fibers, wherein a front roller of a spinning frame adopts independent motor control transmission, a middle roller adopts independent motor control transmission and is in gear transmission with a rear roller, short fiber roving is fed by the rear roller, is drafted by a drafting zone and is output by the front roller to obtain short fiber strands, two filaments are respectively fed by the front rollers positioned at the left side and the right side of the short fiber strands to wrap the short fiber strands, one filament is fed by the front roller positioned right above the short fiber strands to be wrapped by the short fiber strands, the linear density of the short fiber strands, the twisting degree of the short fiber strands and the wrapping degree of the two filaments to the short fiber strands are changed by changing the rotating speed of the front roller during spinning, the linear density of the spun short fiber composite yarn is changed, and the slub effect is realized, meanwhile, the combination mode between two wrapping filaments and one core-spun filament and short fiber strand is changed, so that the production of the filament and short fiber composite slub yarns in various different styles is realized, and the added value of the product is greatly improved.
The specific implementation mode is as follows:
taking the production of a composite yarn in which the spun yarn is a polyester-cotton blended yarn and comprises 65% of polyester and 35% of cotton fibers, 50D of XLA polyolefin elastic fiber filament of core-spun filament and 50D of two 50D T400 filaments of wrapping filament as an example, the method specifically comprises the following steps:
(1) cotton blending is carried out on cotton with production places of Acksu, Usu, Zhijiang and Changjie according to the proportion of 5:2:2:1, cotton fibers are subjected to a first blowing-carding unit, a first pre-drawing, lap and combing process to prepare combed cotton slivers, polyester fibers with the production place of Yuzheng production line with the batch number of 8k and the production line batch number of 32k are mixed according to the proportion of 1:9, polyester slivers are prepared from the polyester fibers through a second blowing-carding unit and a second pre-drawing, polyester cotton hybrid slivers are prepared from the prepared combed cotton slivers and the polyester slivers through a drawing process, wherein the drawing process comprises a first drawing process, a second drawing process and a last drawing process, the combed cotton slivers and the polyester slivers are mixed in the first drawing process, and then the polyester cotton hybrid slivers are prepared into polyester cotton hybrid roving through a roving process;
in the first blowing-carding unit, an FA003 type disc type plucker-SFA 035E mixed opener-FA 106E type card wire beater opener-YQ 600H foreign fiber clearing machine-SF 161A vibration cotton feeder-A076F single beater scutcher-FA 231C type cotton carding machine are sequentially selected, the FA003 type disc type plucker is provided with a trolley rotation speed of 2.36r/min, a beater speed of 940r/min, a blade extending rib distance of 2.5mm-7.5mm adjustable and a beater intermittent descending distance of 3.25 mm/time; the SFA035E mixed cotton opener is set to have a cotton conveying curtain speed of 1.15m/min, a cotton pressing curtain speed of 1.15m/min, a brad curtain speed of 89m/min, a first U-shaped beater rotation speed of 505r/min, a second U-shaped beater rotation speed of 600r/min, a porcupine beater rotation speed of 800r/min and a nose beater rotation speed of 866 r/min; the FA106 type carding wire beater scutcher is provided with a carding wire roller with the diameter of 600mm, the rotating speed of 540r/min, the diameter of a cotton feeding roller with the diameter of 76mm, the rotating speed of 45r/min and the mounting angle of a carding wire roller beater of 65 degrees, an SFA161A set vibrating plate vibration frequency of 82-205 times/min adjustable, a corner nail curtain speed of 54m/min, a flat curtain speed of 8m/min, the rotating speed of a cotton feeding roller of 5.81r/min, the diameter of 200mm, a spacing between a cotton homogenizing roller and an inclined curtain of 0-40mm adjustable, and photoelectric delay action time of 2-5s adjustable; A076F single beater scutcher is provided with a cotton conveying roller speed of 2.00-4.35m/min, a balance roller rotating speed of 11.94r/min, a comprehensive beater rotating speed of 1000r/min, a fan rotating speed of 1460r/min, a lap roller rotating speed of 12r/min, a lap dry weight of 400g/m, a lap wet weight of 432g/m, a lap length of 42m, a lap elongation of 2.86%, a lap actual length of 43.2m, a lap clean weight of 17.28kg and a lap wet clean weight of 18.66 kg; the FA231C type carding machine is provided with a licker-in-cylinder gauge of 6mm, a licker-in-small leakage bottom inlet and outlet gauge of 31mm and 22mm, a licker-in-pre-carding plate gauge of 60mm, a cylinder-large leakage bottom inlet and outlet gauge of 178mm and 31mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 22mm respectively, a cylinder-rear fixed cover plate gauge of 17 mm, 18mm and 19mm, a cylinder cover plate gauge of 13mm, 11 mm and 13mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 11 mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm;
an FA306A drawing frame is adopted in the first pre-drawing, a JSF 360 drawing machine is adopted in a sliver lap, the gauge of a front region roller of the FA306A drawing frame is 10mm, the gauge of a rear region roller is 16mm, the diameter of a pressure bar adjusting ring is 13mm, 3.4mm is adopted in the production of a bell-end aperture factory, the cotton sliver quantity is set to be 14.03g/m, the mechanical draft is 6.452 times, the actual draft is 6.387 times, the roller center distances are respectively 50mm and 51mm, and the number of combined cotton slivers is 6; the lap is provided with a lap dry ration of 47.43g/m, a lap length of 300m, a mechanical draft of 1.384 times, an actual draft of 1.42 times, a production speed of 85r/min, a doubling number of 24, a main draft of 1.34 times, a back draft of 1.032 times and a leather roller pressurization of 42 bar;
adopting a JSF388 comber in combing, setting the cotton comber sliver ration to be 14.12g/5m, the cylinder to be 200 nipped times/min, feeding cotton in a backward feeding mode, the cotton feeding length to be 4.7mm, the cotton doffing rate to be 17 percent, the combing distance to be 0.4mm, and the pressure of a leather roller to be 5 bar;
in the second blowing-carding unit, an FA003 type disc type plucker, an SFA035E mixed opener, an FA106E gill needle beater opener, an SF161A vibration cotton feeder, an A076F single beater scutcher, an FA201B cotton carding machine are sequentially selected, the FA003 type disc type plucker is set to have the rotation speed of a trolley of 2.36r/min, the speed of a beater of 940r/min, the distance of a blade extending out of a rib of 2.5mm-7.5mm and the intermittent descending distance of the beater of 3.25 mm/time; the SFA035E mixed cotton opener is set to have a cotton conveying curtain speed of 1.15m/min, a cotton pressing curtain speed of 1.15m/min, a brad curtain speed of 89m/min, a first U-shaped beater rotation speed of 505r/min, a second U-shaped beater rotation speed of 600r/min, a porcupine beater rotation speed of 800r/min and a nose beater rotation speed of 866 r/min; the FA106 type carding wire beater scutcher is provided with a carding wire roller with the diameter of 600mm, the rotating speed of 540r/min, the diameter of a cotton feeding roller with the diameter of 76mm, the rotating speed of 45r/min and the mounting angle of a carding wire roller beater of 65 degrees, an SFA161A set vibrating plate vibration frequency of 82-205 times/min adjustable, a corner nail curtain speed of 54m/min, a flat curtain speed of 8m/min, the rotating speed of a cotton feeding roller of 5.81r/min, the diameter of 200mm, a spacing between a cotton homogenizing roller and an inclined curtain of 0-40mm adjustable, and photoelectric delay action time of 2-5s adjustable; A076F single beater scutcher is provided with a cotton conveying roller speed of 2.00-4.35m/min, a balance roller rotating speed of 11.94r/min, a comprehensive beater rotating speed of 900r/min, a fan rotating speed of 1460r/min, a cotton lap roller rotating speed of 12r/min, a polyester lap dry weight of 398g/m, a polyester lap wet weight of 400.39g/m, a polyester lap length of 36m, a polyester lap elongation of-1.93%, a polyester lap actual length of 35.5m, a polyester lap clean weight of 14.09kg and a polyester lap wet clean weight of 14.21 kg; the FA231B type carding machine is provided with a licker-in-cylinder gauge of 7mm, a licker-in-small leakage bottom inlet and outlet gauge of 40mm and 24mm, a licker-in-pre-carding plate gauge of 59mm, a cylinder-large leakage bottom inlet and outlet gauge of 63mm and 22mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 31mm respectively, a cylinder-rear fixed cover plate gauge of 18mm, 17 mm and 16mm, a cylinder cover plate gauge of 12mm, 10mm and 12mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 12mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm;
in the second pre-drawing process, an FA306A drawing frame is adopted, the gauge of a front region roller is set to be 10mm, the gauge of a rear region roller is set to be 16mm, the diameter of a pressure bar adjusting ring is 13mm, the diameter of a horn head aperture factory is 3.4mm, the cotton sliver ration is set to be 17.37g/m, the mechanical drafting is 7.059 times, the actual drafting is 6.988 times, the roller center distance is respectively 50mm and 51mm, and the number of combined cotton slivers is 7;
an FA306A drawing frame is adopted in drawing, and comprises a first drawing frame, a second drawing frame and a last drawing frame, wherein the quantity of the slivers in the first drawing frame is 16.44g/5m, the mechanical drafting is 7.937 times, the actual drafting is 7.86 times, the roller spacing distances are respectively 10mm and 16mm, the roller center distances are respectively 50mm and 51mm, the horn caliber is 3.0mm, 5 polyester strips and 3 combed cotton slivers are adopted for feeding, the output speed of a compression roller is 256.8m/min, and the frequency conversion control of a belt pulley is realized; the quantitative quantity of the sliver in the second drawing is 16.39g/5m, the mechanical drawing is 6.082 times, the actual drawing is 6.02 times, the roller gauge is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.2mm, the mixed sliver obtained by 6 head drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out; the quantitative quantity of the sliver in the last drawing is 16.2g/5m, the mechanical drawing is 6.131 times, the actual drawing is 6.07 times, the roller space distance is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.4mm, the mixed sliver obtained by 6 secondary drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out;
an JWF1415 type roving machine is adopted in roving, the dry weight of the roving is set to be 5.02g/10m, the mechanical draft is set to be 6.59 times, the actual draft is 6.46 times, the roller space distances are respectively 12mm, 28mm and 35mm, the roller center distances are respectively 40mm, 54.5mm and 61.5mm, the twist number is 3.3637 twist/m, the jaw space distance is 7.5mm, the rotating speed of a front roller is 304r/min, and the rotating speed of a spindle is 900 r/min;
(2) polyester-cotton mixed roving, an XLA polyolefin elastic fiber filament and two T400 filaments are subjected to a spinning process together to prepare composite yarn, wherein the spinning process adopts a ring spinning frame, the spinning frame adopts an EJM128K type spinning frame provided with a core-spun yarn device and a yarn guide device, the rotating speed of a spindle is 15262r/min, the jaw spacing is 3.5mm, the diameter of a steel collar is 42mm, the roller spacing is respectively 18mm and 25mm, the roller center distance is respectively 43mm and 50mm,
the drafting mechanism of the ring spinning frame comprises a rear roller pair consisting of a rear roller and a rear rubber roller, a middle roller pair consisting of a middle roller and a middle rubber roller, a front roller pair consisting of a front roller and a front rubber roller, wherein the front roller is driven by a first motor to rotate, the middle roller is driven by a second motor to rotate, the middle roller and the rear roller are in transmission connection through a gear, a spindle is driven by a third motor to rotate, a steel collar plate is driven by a fourth motor to lift, polyester-cotton mixed roving is pressed and fed between the rear roller and the rear rubber roller of the rear roller pair, then is pressed and output between the middle roller and the middle rubber roller of the middle roller pair, is subjected to the drafting effect of a rear drafting area consisting of the rear roller pair and the middle roller pair, is pressed and output between the front roller and the front rubber roller of the front roller pair, is subjected to the drafting effect of a front drafting area consisting of the middle roller pair and the front roller pair, and finally is subjected to the front nip between the front roller and, two T400 filaments are respectively pressed by the filament guide device and then are output by a front jaw between the front roller and the front rubber roller after passing through the front roller and the front rubber roller of the front roller pair, the two T400 filaments are arranged on the front jaws at the left and right sides of the polyester-cotton mixed sliver and are symmetrically distributed relative to the polyester-cotton mixed sliver, an XLA polyolefin elastic fiber filament is pressed by the core filament feeding device and then is output by the front jaw between the front roller and the front rubber roller after passing through the front roller and the front rubber roller of the front roller pair, and the XLA polyolefin elastic fiber filament is pressed and fed between the front roller and the front rubber roller right above the polyester-cotton mixed sliver, so that the XLA polyolefin elastic fiber filament and the polyester-cotton mixed sliver are output by the front jaw together, the rotating speeds of the second motor, the third motor and the fourth motor are kept unchanged during spinning, and the rotating speed of the middle roller, the rotating speed of the spindle and the lifting speed of the steel collar plate are kept unchanged, at this time, the draft multiple d1 of the back draft zone is equal to the rotation speed of the middle roller/the rotation speed of the back roller, d1 is determined by a gear between the middle roller and the back roller, the draft multiple d2 of the front draft zone is equal to the rotation speed of the front roller/the rotation speed of the middle roller is equal to the rotation speed of the first motor/the rotation speed of the second motor, the linear density of the polyester-cotton blended sliver is equal to the linear density of the polyester-cotton blended roving/(d 1 × d2), and the rotation speed of the first motor is set to include three states: firstly, the linear density of polyester-cotton mixed sliver is larger than 11tex, on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the action of twisting twist to obtain polyester-cotton mixed spun yarn, on the other hand, XLA polyolefin elastic fiber filament is continuously wrapped in the twisting process of the polyester-cotton mixed sliver, so that the XLA polyolefin elastic fiber filament is completely wrapped in the polyester-cotton mixed spun yarn to obtain inner wrapping yarn, and meanwhile, two T400 filaments on the left side and the right side are driven to wrap the surface of the inner wrapping yarn simultaneously in the twisting process of the polyester-cotton mixed sliver to obtain a roving section of the composite yarn; secondly, the linear density of the polyester-cotton mixed sliver is between 5.5tex and 11tex, on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the action of twisting twist to obtain polyester-cotton mixed spun yarn, on the other hand, XLA polyolefin elastic fiber filaments are not sufficiently wrapped in the twisting process of the polyester-cotton mixed sliver, so that the polyester-cotton mixed spun yarn is continuously wrapped on the XLA polyolefin elastic fiber filaments to obtain internally wrapped yarn, the XLA polyolefin elastic fiber filaments are kept vertical, and meanwhile, two T400 filaments on the left side and the right side are driven to be simultaneously wrapped on the surface of the internally wrapped yarn in the twisting process of the polyester-cotton mixed sliver, and then a middle yarn section of the composite yarn is obtained; and thirdly, enabling the linear density of the polyester-cotton mixed sliver to be less than 5.5tex, on one hand, continuously twisting the polyester-cotton mixed sliver into yarn under the action of twisting twist to obtain polyester-cotton mixed spun yarn, on the other hand, enabling the XLA polyolefin elastic fiber filament to be insufficiently wrapped in the twisting process of the polyester-cotton mixed sliver, so that the polyester-cotton mixed spun yarn and the XLA polyolefin elastic fiber filament are kept parallel, then obtaining inner parallel yarn, and simultaneously driving two T400 filaments on the left side and the right side to be simultaneously wrapped on the surface of the inner wrapped yarn in the twisting process of the polyester-cotton mixed sliver, thus obtaining the spun yarn section of the composite yarn.
The results of the composite yarn quality tests are shown in the following table:
Figure GDA0002622204470000091

Claims (2)

1. a production method of high-elastic composite yarn, the composite yarn comprises a spun yarn, a core-spun filament and two wrapping filaments, and is characterized in that: the combination mode of one spun yarn, one core-spun filament and two wrapping filaments along the length direction of the composite yarn comprises three modes, wherein firstly, when the linear density of the spun yarn is more than twice of that of the core-spun filament, the core-spun filament is completely wrapped by the spun yarn to obtain an inner core-spun yarn, and the two wrapping filaments are wrapped outside the inner core-spun yarn simultaneously; when the linear density of the spun yarn is between one time and two times of that of the core-spun filament, the spun yarn is wound on the core-spun filament to obtain an inner wrapping yarn, the core-spun filament is kept vertical, and the two wrapping filaments are wrapped outside the inner wrapping yarn at the same time; thirdly, when the linear density of the spun yarn is smaller than that of the core-spun filament, the spun yarn and the core-spun filament are arranged in parallel to obtain an inner parallel yarn, and the two wrapping filaments wrap the outer part of the inner parallel yarn at the same time; and the twist of the spun yarn is in inverse proportion to the linear density of the spun yarn and in direct proportion to the wrapping twist of the two wrapping yarns, wherein the spun yarn is polyester-cotton blended yarn, the core-spun filament is XLA polyolefin elastic fiber filament, and the two wrapping filaments are T400 filament, and the method specifically comprises the following steps:
the first step is as follows: cotton blending is carried out on cotton with production places of Acksu, Usu, Zhijiang and Changjie according to the proportion of 5:2:2:1, cotton fibers are subjected to a first blowing-carding unit, a first pre-drawing, lap and combing process to prepare combed cotton slivers, polyester fibers with the production place of Yuzheng production line with the batch number of 8k and the production line batch number of 32k are mixed according to the proportion of 1:9, polyester slivers are prepared from the polyester fibers through a second blowing-carding unit and a second pre-drawing, polyester cotton hybrid slivers are prepared from the prepared combed cotton slivers and the polyester slivers through a drawing process, wherein the drawing process comprises a first drawing process, a second drawing process and a last drawing process, the combed cotton slivers and the polyester slivers are mixed in the first drawing process, and then the polyester cotton hybrid slivers are prepared into polyester cotton hybrid roving through a roving process;
the second step is that: polyester-cotton mixed roving, an XLA polyolefin elastic fiber filament and two T400 filaments are subjected to a spinning process together to prepare composite yarn, wherein the spinning process adopts a ring spinning frame, a drafting mechanism of the ring spinning frame comprises a rear roller pair consisting of a rear roller and a rear rubber covered roller, a middle roller pair consisting of a middle roller and a middle rubber covered roller, and a front roller pair consisting of a front roller and a front rubber covered roller, the front roller is driven to rotate by a first motor, the middle roller is driven to rotate by a second motor, the middle roller and the rear roller are in gear connection transmission, a main shaft spindle is driven to rotate by a third motor, a steel collar plate is driven to lift by a fourth motor, the polyester-cotton mixed roving is fed by the rear roller and the rear rubber covered roller of the rear roller pair, then is pressed and output by the middle roller and the middle rubber covered roller of the middle roller pair and is subjected to the drafting action of a rear drafting zone formed by the rear roller pair and the, then the polyester cotton mixed fiber is output through the pressing between a front roller and a front rubber roller of a front roller pair under the drafting action of a front drafting zone formed between a middle roller pair and a front roller pair, finally the polyester cotton mixed fiber strip is output through a front jaw between the front roller pair and a front rubber roller, two T400 filaments are respectively output through the front jaw between the front roller pair and the front rubber roller after being pressed between the front roller pair and the front rubber roller after passing through a yarn guide device, the two T400 filaments are symmetrically distributed on the front jaws positioned at the left side and the right side of the polyester cotton mixed fiber strip, one XLA polyolefin elastic fiber filament is output through the front jaw between the front roller pair and the front rubber roller after being pressed between the front roller pair and the front rubber roller after passing through a core yarn feeding device, and is fed through the front jaw between the front roller positioned right above the polyester cotton mixed fiber strip, so that the XLA polyolefin elastic fiber filament and the polyester cotton mixed fiber strip are output through the front jaw together, during spinning, the rotating speeds of the second motor, the third motor and the fourth motor are kept unchanged, so that the rotating speed of the middle roller, the rotating speed of the spindle and the lifting speed of the ring plate are kept unchanged, at the moment, the draft multiple d1 of the rear draft zone is equal to the rotating speed of the middle roller/the rotating speed of the rear roller, d1 is determined by a gear between the middle roller and the rear roller, the draft multiple d2 of the front draft zone is equal to the rotating speed of the front roller/the rotating speed of the middle roller is equal to the rotating speed of the first motor/the rotating speed of the second motor, the linear density of the polyester-cotton mixed fiber is equal to the linear density of the polyester-cotton mixed roving/(d 1 × d2), and the rotating speed of the first motor is set to comprise three states: firstly, make the linear density of the mixed whisker strip of polyester-cotton be greater than the twice of XLA polyolefin elastic fiber filament's linear density, also satisfy: the first motor rotating speed is less than the second motor rotating speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 multiplied by 2 multiplied by the linear density of the XLA polyolefin elastic fiber filament), at this time, because the linear density of the polyester-cotton mixed sliver is more than twice of the linear density of the XLA polyolefin elastic fiber filament, and because the twist of the polyester-cotton mixed sliver is the spindle rotating speed/the front roller rotating speed/the third motor rotating speed/the first motor rotating speed, the twist of the polyester-cotton mixed sliver is larger and increases along with the reduction of the first motor speed, thereby on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the action of the twist to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is continuously wrapped in the process of the polyester-cotton mixed sliver, so that the XLA polyolefin elastic fiber filament is completely wrapped in the polyester-cotton mixed spun yarn, then obtaining the inner covering yarn, and simultaneously, keeping a certain distance between the polyester-cotton mixed fiber strips and the T400 filament and polyester-cotton mixed fiber strips on the left side and the right side at the front jaw and fixedly connecting the polyester-cotton mixed fiber strips and the polyester-cotton mixed fiber strips under the front jaw, so that the two T400 filaments on the left side and the right side are driven to wrap the surface of the inner covering yarn simultaneously in the twisting process of the polyester-cotton mixed fiber strips, and then obtaining a roving section of the composite yarn; secondly, the linear density of the polyester-cotton mixed fiber strand is between one time and two times of the linear density of XLA polyolefin elastic fiber filaments, and the following requirements are met: the second motor rotation speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 × 2 × XLA polyolefin elastic fiber filament linear density) < the first motor rotation speed < the second motor rotation speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 × XLA polyolefin elastic fiber filament linear density), at this time, because the linear density of the polyester-cotton mixed sliver is between one time and two times of the linear density of the XLA polyolefin elastic fiber filament, and because the twist of the polyester-cotton mixed sliver is equal to the spindle rotation speed/the front roller rotation speed equal to the third motor rotation speed/the first motor rotation speed, the twist of the polyester-cotton mixed sliver is centered and decreases with the increase of the first motor speed, so that on one hand, the polyester-cotton mixed sliver is continuously twisted into a yarn under the twisting action of the twist to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is not enough to be wrapped in the twisting process of the polyester-cotton mixed sliver, the polyester-cotton mixed spun yarn is continuously wrapped on the XLA polyolefin elastic fiber filament to obtain an internally wrapped yarn, the XLA polyolefin elastic fiber filament is kept vertical, and meanwhile, as the T400 filament and the polyester-cotton mixed filament strips positioned on the left side and the right side keep a certain distance from each other at the front jaw and are fixedly connected with each other below the front jaw, the two T400 filament strips on the left side and the right side are driven to be simultaneously wrapped on the surface of the internally wrapped yarn in the twisting process of the polyester-cotton mixed filament strips, and then a middle yarn section of the composite yarn is obtained; thirdly, the linear density of the polyester-cotton mixed fiber strand is smaller than that of XLA polyolefin elastic fiber filaments, namely, the linear density meets the following requirements: the first motor rotating speed is greater than the second motor rotating speed multiplied by the linear density of the polyester-cotton mixed roving/(d 1 multiplied by 2 multiplied by the linear density of the XLA polyolefin elastic fiber filament), at this time, because the linear density of the polyester-cotton mixed sliver is less than the linear density of the XLA polyolefin elastic fiber filament, and because the twisting twist of the polyester-cotton mixed sliver is equal to the spindle rotating speed/the front roller rotating speed is equal to the third motor rotating speed/the first motor rotating speed, the twisting twist of the polyester-cotton mixed sliver is smaller and is reduced along with the increase of the first motor speed, so that on one hand, the polyester-cotton mixed sliver is continuously twisted into yarn under the twisting action of the twisting degree to obtain the polyester-cotton mixed spun yarn, on the other hand, the XLA polyolefin elastic fiber filament is not enough to be wrapped in the twisting process of the polyester-cotton mixed sliver, so that the polyester-cotton mixed spun yarn and the XLA polyolefin elastic fiber filament are kept parallel, and then the inner parallel yarn is obtained, meanwhile, the T400 filaments and the polyester-cotton mixed sliver on the left side and the right side keep a certain distance from each other at the position of the front jaw and are fixedly connected with each other below the front jaw, so that the two T400 filaments on the left side and the right side are driven to wrap the surface of the inner wrapped yarn simultaneously in the twisting process of the polyester-cotton mixed sliver, and then the spun yarn section of the composite yarn is obtained.
2. The method for producing a high-elastic composite yarn according to claim 1, wherein: in the first blowing-carding unit, an FA003 type disc type plucker-SFA 035E mixed opener-FA 106E type card wire beater opener-YQ 600H foreign fiber cleaner-SF 161A vibration cotton feeder-A076F single beater scutcher-FA 231C type cotton carding machine are sequentially selected, the FA003 type disc type plucker ensures that the cotton grabbing amount of each tooth of a blade of the cotton grabbing beater of the disc type plucker is slightly mastered according to the principle of fine cotton grabbing, the rotation speed of a trolley is set to be 2.36r/min, the cotton grabbing beater speed is 940r/min, the distance of the extending rib of the blade is 2.5mm-7.5mm adjustable, and the intermittent descending distance of the beater is 3.25 mm/times; the SFA035E mixing and opening machine feeds the raw materials grabbed by the automatic plucker through the suction of the condenser, and performs mixing, high opening and impurity removal treatment, the impurity removal rate is high, the speed of a cotton conveying curtain is set to be 1.15m/min, the speed of a cotton pressing curtain is set to be 1.15m/min, the speed of a corner nail curtain is set to be 89m/min, the rotating speed of a first U-shaped beater is 505r/min, the rotating speed of a second U-shaped beater is set to be 600r/min, the rotating speed of a porcupine beater is set to be 800r/min, and the rotating speed of a nose beater is set to be 866; the FA106 type carding wire beater scutcher further opens and removes impurities from the primarily opened chemical fibers, the diameter of a carding wire roller is 600mm, the rotating speed is 540r/min, the diameter of a cotton feeding roller is 76mm, the rotating speed is 45r/min, the mounting angle of the carding wire roller beater is 65 degrees, the SFA161A further opens, mixes and processes the raw cotton of various grades sent by a cotton distributor or the chemical fibers below 76mm into uniform banners, the banners are fed into a lap former to be made into cotton rolls, the vibration frequency of a vibration plate is set to be adjustable between 82 and 205 times/min, the corner nail curtain speed is 54m/min, the flat curtain speed is 8m/min, the rotating speed of the cotton feeding roller is 5.81r/min, the diameter is 200mm, the spacing between the cotton homogenizing roller and an inclined curtain is set to be adjustable between 0 and 40mm, and the photoelectric delay action time is set to be adjustable between 2 and 5 s; A076F single beater scutcher is suitable for processing various raw cottons and various chemical fibers below 76mm, further opening and removing impurities from the fibers, and making into cotton rolls for carding machines, wherein the speed of a cotton conveying roller is 2.00-4.35m/min, the rotating speed of a balance roller is 11.94r/min, the rotating speed of a comprehensive beater is 1000r/min, the rotating speed of a fan is 1460r/min, the rotating speed of a cotton roll roller is 12r/min, the dry weight of the cotton roll is 400g/m, the wet weight of the cotton roll is 432g/m, the length of the cotton roll is 42m, the elongation of the cotton roll is 2.86%, the actual length of the cotton roll is 43.2m, the clean weight of the cotton roll is 17.28kg, and the wet net weight of the cotton roll is 18; the FA231C type carding machine is provided with a licker-in-cylinder gauge of 6mm, a licker-in-small leakage bottom inlet and outlet gauge of 31mm and 22mm, a licker-in-pre-carding plate gauge of 60mm, a cylinder-large leakage bottom inlet and outlet gauge of 178mm and 31mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 22mm respectively, a cylinder-rear fixed cover plate gauge of 17 mm, 18mm and 19mm, a cylinder cover plate gauge of 13mm, 11 mm and 13mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 11 mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm; the first pre-drawing adopts an FA306A drawing frame, a JSF 360 drawing frame is adopted in a sliver lap, the FA306A drawing frame adjusts the distance between the front roller holding point and the rear roller holding point according to the quality and the length of a fiber to be spun, a roller gauge is used for adjusting, a roller gauge is used for threading a required roller gauge sheet on the roller A, then a core rod is placed on the surface of the roller, a roller seat is moved to enable the surface of the roller to be tightly attached to the gauge sheet, the left eye and the right eye are simultaneously checked, the parallelism between two rollers is facilitated, the roller gauge is 10mm, the rear roller gauge is 16mm, the diameter of a pressure rod adjusting ring is 13mm, a horn head aperture factory adopts 3.4mm, the cotton sliver dry weight is set to be 14.03g/m, the mechanical draft is 6.452 times, the actual draft is 6.387 times, the roller center distances are respectively 50mm and 51mm, and the combined number is 6; through the pre-drawing process, the lap is used as a preparation process of combing, the dry weight of the lap is 47.43g/m, the length of the lap is 300m, the mechanical drafting is 1.384 times, the actual drafting is 1.42 times, the production speed is 85r/min, the number of the lap is 24, the main drafting is 1.34 times, the back drafting is 1.032 times, and the pressure of a leather roller is 42 bar; in combing, a JSF388 comber is adopted, the raw slivers of the carding machine are combed through pre-drawing and lap production, and short fibers below 16mm in the lap are removed; setting the cotton combing evenness ration to be 14.12g/5m, the cylinder to be 200 times/min, feeding cotton in a cotton feeding mode to retreat, the cotton feeding length to be 4.7mm, the cotton doffing rate to be 17 percent, the carding spacing to be 0.4mm, and the pressure of a leather roller to be 5 bar; in the second blowing-carding unit, an FA003 type disc type plucker, an SFA035E mixed opener, an FA106E gill needle beater opener, an SF161A vibration cotton feeder, an A076F single beater scutcher, an FA201B cotton carding machine are sequentially selected, the FA003 type disc type plucker is set to have the rotation speed of a trolley of 2.36r/min, the speed of a beater of 940r/min, the distance of a blade extending out of a rib of 2.5mm-7.5mm and the intermittent descending distance of the beater of 3.25 mm/time; the SFA035E mixed cotton opener is set to have a cotton conveying curtain speed of 1.15m/min, a cotton pressing curtain speed of 1.15m/min, a brad curtain speed of 89m/min, a first U-shaped beater rotation speed of 505r/min, a second U-shaped beater rotation speed of 600r/min, a porcupine beater rotation speed of 800r/min and a nose beater rotation speed of 866 r/min; the FA106 type carding wire beater scutcher is provided with a carding wire roller with the diameter of 600mm, the rotating speed of 540r/min, the diameter of a cotton feeding roller with the diameter of 76mm, the rotating speed of 45r/min and the mounting angle of a carding wire roller beater of 65 degrees, an SFA161A set vibrating plate vibration frequency of 82-205 times/min adjustable, a corner nail curtain speed of 54m/min, a flat curtain speed of 8m/min, the rotating speed of a cotton feeding roller of 5.81r/min, the diameter of 200mm, a spacing between a cotton homogenizing roller and an inclined curtain of 0-40mm adjustable, and photoelectric delay action time of 2-5s adjustable; A076F single beater scutcher is provided with a cotton conveying roller speed of 2.00-4.35m/min, a balance roller rotating speed of 11.94r/min, a comprehensive beater rotating speed of 900r/min, a fan rotating speed of 1460r/min, a cotton lap roller rotating speed of 12r/min, a polyester lap dry weight of 398g/m, a polyester lap wet weight of 400.39g/m, a polyester lap length of 36m, a polyester lap elongation of-1.93%, a polyester lap actual length of 35.5m, a polyester lap clean weight of 14.09kg and a polyester lap wet clean weight of 14.21 kg; the FA231B type carding machine is provided with a licker-in-cylinder gauge of 7mm, a licker-in-small leakage bottom inlet and outlet gauge of 40mm and 24mm, a licker-in-pre-carding plate gauge of 59mm, a cylinder-large leakage bottom inlet and outlet gauge of 63mm and 22mm, a cylinder-rear cover plate upper gauge and a cylinder-rear cover plate lower gauge of 19mm and 31mm respectively, a cylinder-rear fixed cover plate gauge of 18mm, 17 mm and 16mm, a cylinder cover plate gauge of 12mm, 10mm and 12mm, a cylinder-front upper cover plate gauge of 31mm, a cylinder-front lower cover plate gauge of 22mm, a cylinder-front fixed cover plate gauge of 12mm, 10mm and 9mm, and a cylinder-doffer gauge of 5 mm; in the second pre-drawing process, an FA306A drawing frame is adopted, the gauge of a front region roller is 10mm, the gauge of a rear region roller is 16mm, the diameter of a pressure bar adjusting ring is 13mm, 3.4mm is adopted in the production of a trumpet head aperture factory, the cotton yarn quantity is set to be 17.37g/m, the mechanical drafting is 7.059 times, the actual drafting is 6.988 times, the roller center distance is respectively 50mm and 51mm, and the number of combined cotton yarns is 7; an FA306A drawing frame is adopted in drawing, and comprises a first drawing frame, a second drawing frame and a last drawing frame, wherein the quantity of the slivers in the first drawing frame is 16.44g/5m, the mechanical drafting is 7.937 times, the actual drafting is 7.86 times, the roller spacing distances are respectively 10mm and 16mm, the roller center distances are respectively 50mm and 51mm, the horn caliber is 3.0mm, 5 polyester strips and 3 combed cotton slivers are adopted for feeding, the output speed of a compression roller is 256.8m/min, and the frequency conversion control of a belt pulley is realized; the quantitative quantity of the sliver in the second drawing is 16.39g/5m, the mechanical drawing is 6.082 times, the actual drawing is 6.02 times, the roller gauge is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.2mm, the mixed sliver obtained by 6 head drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out; the quantitative quantity of the sliver in the last drawing is 16.2g/5m, the mechanical drawing is 6.131 times, the actual drawing is 6.07 times, the roller space distance is respectively 10mm and 16mm, the roller center distance is respectively 50mm and 51mm, the caliber of a horn is 3.4mm, the mixed sliver obtained by 6 secondary drawing is fed, the output speed of a compacting roller is 256.8m/min, and the frequency conversion control of a belt pulley is carried out; an JWF1415 type roving machine is adopted in roving, the dry weight of the roving is set to be 5.02g/10m, the mechanical draft is set to be 6.59 times, the actual draft is 6.46 times, the roller space distances are respectively 12mm, 28mm and 35mm, the roller center distances are respectively 40mm, 54.5mm and 61.5mm, the twist number is 3.3637 twist/m, the jaw space distance is 7.5mm, the rotating speed of a front roller is 304r/min, and the rotating speed of a spindle is 900 r/min; the spun yarn adopts an EJM128K type spinning machine additionally provided with a core-spun yarn device and a yarn guide device, and is provided with a spindle rotating speed of 15262r/min, a jaw space of 3.5mm, a ring diameter of 42mm, roller spaces of 18mm and 25mm respectively and roller center distances of 43mm and 50mm respectively.
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Denomination of invention: A Production Method of High Elastic Composite Yarn

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