CN109972252A - Production method of high-count pure cotton yarn - Google Patents

Abstract

The invention discloses a method for producing high-count pure cotton yarn. The method adopts long-staple cotton with an average grade of 3.46 and an average length of 36.75mm, and the blowing is completed on the four-hand cleaning and carding unit; the method adopts an average grade of 31 and an average length of 28.96mm. The fine-staple cotton is finished, and the cleaning is completed on the second brushing and carding unit. After the two are pre-combined, they are mixed on the sliver and spooling unit, and then they are combed, drawn, roving and spun together to obtain a quantitative ratio of 0.89g/100m fine spun yarn. The production method of the invention saves the production cost and improves the yarn quality.

Description

Production method of high-count pure cotton yarn

technical field

The invention belongs to the technical field of textiles, and relates to a new type of yarn weaving process, in particular to a method for producing high-count pure cotton yarn.

Background technique

With the development of social economy and the continuous improvement of people's living standards, for apparel textiles, in addition to the pursuit of wearing comfort, more and more attention is paid to their fashion and functionality, and the pursuit of unique styles and various functions, such as antibacterial , Anti-static and other functions. In order to meet this demand of consumers, it has become an important task for the textile industry to continuously develop new yarns and fabrics. With the development of science and technology, the competition in the textile market is becoming more and more fierce. In order to maximize profits, various manufacturers continue to develop in the direction of high-grade, high-grade, good technical content and high added value.

In view of this, the present invention provides a method for producing high-count pure cotton yarn, which adopts long-staple cotton with an average grade of 3.46 and an average length of 36.75 mm, and completes the blowing on the four grips of the blowing-carding unit; 28.96mm fine-staple cotton, and the cleaning is completed on the second blowing-carding unit. After the two are pre-combined, they are mixed on the sliver-rolling unit, and then combed, drawn, roving, and spun together. The basis weight is 0.89g/100m of spun yarn.

SUMMARY OF THE INVENTION

Solved technical problem: the purpose of this invention is to provide a kind of high-count pure cotton yarn production method, after the long-staple cotton and the fine-staple cotton are respectively through the blowing carding and pre-drawing, after the sliver is rolled and mixed together. After combing, the consistent control of the two lengths can be achieved, and the high-count spun yarn with a basis weight of 0.89g/100m can be obtained by combing, drawing, roving and spun yarn together, thereby saving production costs and improving yarn quality.

Technical scheme: The production method of high-count pure cotton yarn, the long-staple cotton is cleaned on the fourth grip of the blowing-carding unit, and the fine-staple cotton is cleaned on the second grip of the blowing-carding unit. The sliver is mixed on the sliver and spooling machine, and then combed, drawn, roving and spun together to obtain a spun yarn with a basis weight of 0.89g/100m, including the following steps:

The first step: cotton matching: according to the classification and queuing method, the length of Xinjiang long-staple cotton and fine-staple cotton is used as the main component for cotton blending; due to the use of a cotton picker to mix cotton, the total amount of cotton used is large, and the number of queues should be set more. , Xinjiang long-staple cotton set up 9 teams; and the mixed use of fine-staple cotton from various places, the raw cotton production area is vast and complex, and the quality varies greatly. In order to stabilize the quality and reduce the number of batches, the number of teams should be set more. It is set to 19 teams; according to the characteristics of the reciprocating cotton grabber, combined with the main performance indicators obtained from different raw cotton tests, arrange the bale diagram to ensure the stable quality of the cotton grabbed each time;

The second step: long-staple cotton cleaning and carding: including the cleaning process and the carding process. The tasks of the carding process include four aspects: opening, cleaning, mixing, and uniform rolling. In order to ensure the effect of mixing and opening, many The combination of a cotton box, free blow and grip blow is used to open and remove impurities. Each stand-alone machine is based on the principle of "evenly grasping and fine grasping, large impurities fall early and less broken, opening and combing instead of beating", reduce the amount of grasping. The weight of the cotton bundle block makes the impurities fully exposed on the surface of the cotton bundle to achieve the purpose of controlling the growth of short staples and the growth of neps in the cleaning line. Gradually open to reduce damage to cotton fibers; for the process of picking up cotton, it is set to adapt to four different heights of cotton bales, and two opening and cleaning lines are supplied at the same time. The cotton bales with different heights are finally finished at the same time, and the speed of the cotton picker is driven to 1200-1400r/min; for the multi-silo cotton blending process, each warehouse is randomly filled with cotton, the output speed of each warehouse is different, and the storage height of each warehouse is different. Mixing is carried out on the output cotton curtain. A beater is set under each bin to further decompose the cotton bundle. The beater speed is 500r/min; for the cotton cleaning and impurity removal process, the working range is set to 1.5m. The cooperation of the feeding roller with sawtooth strips greatly enhances the opening efficiency of the subsequent two beaters including the spiral blade beater and the free-strike beater, and removes impurities without increasing neps; the beater speed is 420r/min, due to the opening The number of counting settings is small. In order to enhance the impurity removal efficiency, the dust bar is opened at the maximum angle; for the cotton opening and impurity removal process, a sawtooth beater is used, and a carding plate is installed under it. The precisely adjusted dust-removing knife makes the noil discharge continuously, the working range is 1.5m, the beater speed is 760r/min, and the angle is 0°; for the carding process of long-staple cotton, the FA203A carding machine is selected, the long-staple cotton fiber length is long and neat At the same time, because the fiber maturity is good, the fiber strength is good, but the short staple and impurities are slightly higher, and the rotation speed is appropriately increased to increase the output;

The third step: fine-staple cotton cleaning and carding: including the opening and cleaning process and the carding process. The process principle of the opening and cleaning process adopts "multiple bales, fine cotton picking, gradual opening and delivery, early fall and less broken, and carding instead of beating. Due to the impurities in the raw cotton, the beater speed is set on the high side; for the cotton picking process, according to the principle of fine cotton grasping, the serrated blade is inserted into the cotton layer shallowly, the average weight of the grasped cotton block is light, and the opening effect is Well, make sure that the amount of cotton catching per tooth of the cotton catching beater blade of the cotton picker is too small, and the speed of the cotton picking beater is set too high, the blade has a strong effect on the cotton block, the cotton block is small, the average weight is light, and the opening The effect is good, and the intermittent drop distance of the beater is set to be small, which is conducive to increasing the effect of opening and removing impurities and improving the output; for the process of cotton opening and removing impurities, free blow is used to ease the opening effect and the fiber is not easy to damage. The beater speed is set to 600. While enhancing the effect of opening and removing impurities, it can avoid the re-flowering of the drum to form filaments. The gap between the beater and the dust bar is set too small to enhance the effect of opening and cleaning; Impurity removal effect; for the multi-bin mixing process, the speed of the stripping roller is set to 412r/min, and the speed of the beater should not be too high, so as to avoid the occurrence of back flowers, and at the same time to avoid the formation of ropes due to repeated blows and excessive blows at the beater. and cotton balls; for the process of cleaning cotton and removing impurities, the working principle of the blower-carding combined feeding box and the principle of carding and removing impurities are organically combined, and the fed fibers are initially opened into small cotton bundles, and then the cotton The bundle is beaten with a comb to strip impurities from the inside of the fiber; at the same time, an FA125 heavy object separator is equipped before the cotton opener to remove metal impurities and reduce the pressure of impurity removal in the subsequent process. After the cotton flow passes through the fan and carding pipeline, it enters the FA179B blowing and carding connection box, and the uniformly opened and mixed fibers are formed into a uniform feast cotton layer and fed into the card The cotton machine ensures the continuous and uniform supply of cotton by the carding machine, and realizes the continuous cleaning and carding process; for the carding process of fine-staple cotton, the FA203A carding machine is selected. Because the fine-staple cotton is sawtooth cotton, the length is short and the fiber strength is poor. , but the fiber uniformity is good, the short pile and impurities are less, so the speed is appropriately reduced to reduce the damage to the fiber;

Step 4: Pre-drawing frame: For long-staple cotton pre-drawing design, use 5 long-staple cotton carding slivers for pre-drawing. The initial quantitative design of long-staple cotton pre-drawing frame is 20.09g/5m. Design, use 5 fine-staple cotton carded sliver for pre-drawing, and the initial quantitative design of fine-staple cotton pre-drawing frame is 21.03g/5m;

Step 5: Strip and roll: 20 long-staple cotton pre-drawing frames and 4 fine-staple cotton pre-drawing frames are used to form rolls on the strip rolling machine. The long-staple cotton pre-draw frames are divided into 5 groups, each group of 4, and the 4 fine-staple cotton pre-draw frames are embedded in the 5 groups of long-staple cotton pre-draw frames in turn; It not only improves the uniformity of the vertical and horizontal directions of the small rolls, but also improves the straightness and parallelism of the fibers.

Step 6: Combing: The even-number principle process is adopted in the combing preparation process, so that most of the hook fibers are still in the front hook state in the cotton layer held by the nipper when the small roll is fed into the comber. It makes it easier to be combed by the cylinder, so as to be straightened, which can further reduce the noil rate, so as to reduce the loss of fibers and save cotton; in order to reduce the neps of the combing sliver, the comber adopts a smaller feeding length. , reduce the carding distance, enhance the carding effect, and pay attention to the joints of the fibers to improve the quality of the output cotton web; control the noil rate of the combed sliver, reduce the loss, fully eliminate the short lint and impurities, and improve the quality of the combed sliver cotton web. To improve the clarity of the sliver, properly reduce the ration of the sliver, and improve the evenness of the combed sliver by using a slow speed and reducing the total draft ratio; regularly clean the intarsia and impurities in the gap of the cylinder, and the gap between the top comb needles. Remove impurities, and trim the brush in time to maintain the flatness of the brush and reduce the occurrence of broken edges of the cotton mesh;

Step 7: Drawing: According to the odd-number rule in the drawing process, a merging principle is adopted, and a drawing frame with autoleveling is selected. The autoleveling system adopts short segments, with high leveling accuracy and wide leveling range, which can guarantee On-line detection of cotton sliver, to ensure that evenness CV% is below 2.5, select 6 cotton combed sliver obtained in the sixth step for merging, for roller drafting, select curve drafting process, for roller gripping distance, in order to It does not damage the fibers, but can also control the movement of most fibers. The holding distance of the rollers is larger than the quality length of the fibers, and the process principle of "tight gap and heavy pressure" is adopted, which is beneficial to improve the evenness of the output whiskers. ;For roller pressurization, the roller pressurization needs to keep the roller jaws with enough holding force to overcome the drafting force and prevent the delamination of the whiskers under the roller jaws at a large slip speed. The pressurization method is a spring cradle Pressurized, and the gripping force of the jaws of the front roller is set to be greater than that of the rear roller;

The eighth step: roving: including three processes, drafting: draw and draw the sliver by 8-10 times, so that the fibers in the sliver are further stretched and parallel, to prepare for the drafting of the spun yarn, using four rollers and three drafting zones The double short apron drafting, in which the drafting ratio between 1-2 rollers is set to 1.05 times, which is the finishing area, and a front cotton collector is set in the finishing area, and the diameter of the front cotton collector is 5, 2 Between -3 rollers is the main drafting area, and no cotton collector is placed in the main drafting area, so that the drafting is not concentrated and bundled without drafting, so as to achieve the purpose of improving the evenness of evenness, and the finishing between 3-4 rollers Coagulation zone, so that the fibers drawn in the main drafting zone can be bundled in the finishing and coagulation zone. A rear cotton collector is set in the finishing and coagulation zone, and the diameter of the rear cotton collector is selected to be 12, which is good for the grip of the drafting roller. The holding distance is determined according to the quality length Lp of the fiber, and is considered comprehensively with reference to the uniformity of the fiber and the drafting force in the drafting area. The rear area between the rollers is simple roller drafting, and the process method of heavy pressure and large distance is adopted. Due to the collector, the holding distance can be appropriately enlarged. Since the quality length of the pure cotton fiber is 36mm, the distance between 1-2 rollers is 36mm. The holding distance in the finishing area is set to 38mm, including the roller diameter of 28mm and the gauge distance of 10mm; Twisting: add appropriate twist to the drafted whiskers to make the roving have a certain strength and prevent accidental drafting or breaking , the twist coefficient of the roving is slightly larger, which is beneficial to the stability of the yarn quality. In the actual production process, the twist coefficient of the roving is selected to be 105; winding forming: the twisted roving is wound on the roving bobbin to make a shape that meets certain requirements. and size packages, so as to store, transport and adapt to the feeding requirements of the spinning frame, use four-up and four-down double-short apron D-type drafting, put the collector in the main drafting area in front, and carry out drafting and bundling. Separation, reducing the length of the floating area to improve the evenness of evenness;

The ninth step: Spinning: using three-roller and double-drafting zone drafting, long and short aprons, Suessen cradle pressure, mesh ring compact spinning, centralized negative pressure control, using 2.7 pressure bar jaws, shortening the length of the free zone, Thereby reducing the floating fibers, strengthening the control of the fiber movement, and improving the evenness of the yarn; reducing the front area gap, enlarging the rear area gap, reducing the draft ratio of the rear area, and concentrating the front area drafting on the upper and lower aprons to the yarn Under the effective control of the sliver, the density of the beard in the front area of the spun yarn is increased, the loss of edge fibers and short piles is reduced, the hairiness is reduced, the long details are reduced, and the strength is improved; the rear drafting area adopts the curve drafting, and the drafting ratio is small. Provides whiskers with uniform structure for the front drafting area, and adopts "tight gauge and heavy pressure", which is beneficial to control the movement of fibers in the drafting area and improve the uniformity of the output whiskers. The roller gauge in the rear drafting area adopts 38mm ; The drafting configuration process in the front drafting area satisfies the principles of small roller center distance, small floating area and small gap between the rubber ring jaws of the front and middle rollers. The roller gap in the front drafting area is 18mm.

Preferably, the average grade of long-staple cotton is 3.46 and the average length is 36.75mm.

Preferably, the average grade of fine-staple cotton is 31 and the average length is 28.96 mm.

Preferably, in the first step, when the raw materials are used up, the raw cotton produced in the same batch is used to replace the raw cotton. First, the same origin is used as the standard to arrange the bales, secondly, the technical grade is considered, and finally the color characteristic grade is considered.

Preferably, the impurity content of the Xinjiang long-staple cotton is 2.2%.

Preferably, in the second step, the blowing and carding system of Crosrol low impurity raw cotton is selected.

Preferably, in the second step, in the opening and cleaning process, ABO automatic cotton picker is used for picking cotton, 6CB six-silo cotton mixer for mixing and impurity removal, 3RC three-drum cotton cleaner for impurity removal and mixing, and FCI fine cotton opening. The machine is used for opening and impurity removal, and the Uster foreign fiber separator is used for foreign fiber separation, and 2 are set for opening and counting.

Preferably, in the third step, the Qingdao blowing and carding system is used.

Preferably, in the third step, the FA009 reciprocating cotton picker is used in the opening and cleaning process to achieve cotton picking, the FA125 heavy object separator is used to remove heavy objects and impurities, the FA105A uniaxial flow opener is used to achieve opening and impurity removal, and the FA029 multi-silo The cotton blender realizes mixing and impurity removal, the FA116 cotton cleaning machine realizes impurity removal and opening, and the USTER foreign fiber separator realizes foreign fiber separation.

Preferably, an E62 type comber is used in the sixth step.

Beneficial effect: In the present invention, after the long-staple cotton and the fine-staple cotton are respectively combed and pre-drawn, they are combed together after the sliver is spooled and mixed, so as to realize the consistency control of the lengths of the two, and the joints are refined. Combing, drawing, roving and spun yarn can produce high-count spun yarn with a basis weight of 0.89g/100m, thereby saving production costs and improving yarn quality.

Detailed ways

The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Modifications and substitutions made to the methods, steps or conditions of the present invention without departing from the spirit and essence of the present invention all belong to the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Example 1

(1) Raw material selection

Long-staple cotton blending and performance indicators of various cotton bales

Fine-staple cotton blending with cotton and performance indicators of various cotton bales

Note: Grade 31, 3 means grade, 1 means white cotton.

(2) The process flow is designed as follows

Long-staple cotton: optional→ABO automatic cotton picker→6CB six-silo cotton blender→3RC three-drum cleaning machine→FCI fine opener→Uster foreign fiber separator→FA203A carding machine

Fine Staple Cotton: Optional→FA009 Reciprocating Cotton Grabber→FA125 Heavy Object Separator→FA105A Single Axial Flow Opener→FA029 Multi-silo Cotton Blender→FA116 Cotton Cleaner→Uster Foreign Fiber Separator→FA179B Cotton Box →FA203A Carding Machine

Raw cotton blending: SB2 pre-drawing frame → E32 sliver spooling machine → E62 type comber → HSR1000 type draw frame → JWF1415 roving frame → DTM129 type spinning frame

(3) Design of key process parameters

Preliminary dry quantitative selection of each process

Carding:

Fine Staple Cotton Carding Process Design Table

Long-staple cotton carding process design table

Pre-draw:

Pre-combination process design table

Strip and roll:

Strip and roll process process design table

Combing:

Combing process process design table

Draw:

Drawing process process design table

Roving:

Roving process process design table

Spinning yarn:

Spinning process design table

(4) Quality test:

Quality test table for blowing-carding and pre-merging processes

Combed sliver quality test table

Drawing quality test table

Roving Quality Test Table

Spinning yarn twist test table

Yarn twist was measured by Y331LN digital twist meter, and two sets of tests were carried out with 20 sections each. The average twist was 107.10 twists/10cm and 106.80 twists/10cm, and the design was 108.00 twists/10cm. The twist CV<3, the deviation is within the allowable range.

Spinning yarn evenness test table

Yarn evenness was tested by the Uster evenness tester, and the evenness of the cop and the bobbin was tested respectively, and the average grade was 1-2. After winding, the evenness and hairiness of the packaged yarn increased slightly, which were still within a reasonable range.

Spinning Strength Test Table

The yarn strength is tested by the YG063G automatic single yarn strength tester. The test results show that the strength meets the design requirements and the strength uniformity is good. After the details and weak knots of the bobbin yarn are removed, the average tenacity of the single yarn is higher than that of the cop yarn, and the average number of the cop yarn meets the original design requirements.

Claims (10)

1. high-count pure cotton yarn production method, which is characterized in that long-staple cotton is grabbed upper completion blowing in Blowing carding four, medium staple cotton is existed Blowing carding two grabs completion blowing, the two respectively by it is pre- and after, in being mixed on draw frame and lap machine combined, then jointly through essence The spun yarn of quantification of 0.89g/100m is made in comb, drafting, rove, spun yarn, comprising the following steps:

Step 1: distributing cotton: according to the method for classification and queuing, ingredient is distributed cotton based on Xinjiang Long staple cotton and the length of medium staple cotton； Larger with cotton total amount due to using griping cotton machine mixed cotton, the setting of team's number should be more, and 9 teams are arranged in Xinjiang Long staple cotton；And mixed various regions are thin Suede cotton, the vast kind in raw cotton producing region is complicated and quality difference is larger, and in order to which batch number is changed in stability property reduction, the setting of team's number is answered More, medium staple cotton team number is set as 19 teams；The characteristics of according to reciprocation bale plucker, the main property tested in conjunction with different raw cotton Energy index, the row's of arranging properly packet figure guarantee that the cotton quality grabbed every time is stablized；

Step 2: long-staple cotton Blowing carding: including opening or cleaning process and carding step, carding step task includes shredding, is cleaned, and is mixed It closes, uniform coiled four aspects, to guarantee mixing and shredding effect, using multiple hoppers, freely hits and mutually tied with gripping strike The mode of conjunction carries out shredding and removal of impurities, principle of each single machine according to " even grab carefully grab, big miscellaneous caducous few broken, shredding is to comb for beating ", The weight for reducing crawl flock block, makes impurity be sufficiently exposed to the surface of flock, reaches control short flannel and increases and opening or cleaning line cotton knot Increase high purpose；Selection holds strike after first freely hitting, and makes shredding by mitigating to acutely, gradually shredding is realized, to reduce Damage to cotton fiber；For grabbing cotton process, setting adapts to the different cotton packet of four kinds of height, while supplying two opening or cleaning lines, Memory sponge packet height in operation, adjust automatically grab depth, make just different cotton packets finally while having grabbed, grab cotton hired roughneck's speed Reach 1200-1400r/min；For more storehouse mixed cotton processes, supplement cotton using each storehouse is outer at random, every storehouse output speed is different, every storehouse Storing highly is different, is mixed on output cotton curtain, every storehouse following settings hired roughneck is further to decompose flock, Beater Speed 500r/min；For scutching cotton dedoping step, work range 1.5m is set, first hired roughneck is foot staple, is surrounded by sawtooth with one The feed roll motor of item matches, and greatly enhancing subsequent two hired roughnecks includes screw blade hired roughneck and the shredding effect for freely hitting hired roughneck Rate, and impurities removal is carried out in the case where not increasing cotton knot；Beater Speed 420r/min, since opening or cleaning point setting quantity is few, in order to Enhance dust removal rate, dirt stick opens maximum angle；For opener dedoping step, using garnet beater, under be furnished with a point comb version, opener Effect mitigates, dust removal rate is high, blocks without fiber, and the mote knife accurately adjusted discharges noil continuously, and work range 1.5m is beaten Hand speed 760r/min, 0 ° of angle；For the carding step of long-staple cotton, FA203A type carding machine, long-staple cotton fiber length are selected Long, uniformity is preferable, suitably reduction linters rate, simultaneously because fibre maturity is good, fiber strength is excellent, but short flannel and containing miscellaneous It is slightly higher, revolving speed is properly increased, to improve yield；

Step 3: medium staple cotton Blowing carding: including opening or cleaning process and carding step, the technological principle of opening or cleaning process is using " more packets take With, select content, it is progressive open give, it is caducous it is few it is broken, beaten with comb generation, hurt fiber less ", due to containing impurity in raw cotton, so its dozen The higher setting of hand speed；For grabbing cotton process, according to the principle of select content, sawtooth blade is inserted into cotton layer shallowly, the cotton block of crawl Average weight is light, and shredding effect is good, it is ensured that griping cotton machine grab cotton hired roughneck's blade per tooth grab the grasp less than normal of cotton amount, grab cotton hired roughneck's The higher setting of speed, blade are violent to the effect of cotton block, and crawl cotton block is small, and average weight is light, and shredding is made good use of, under hired roughneck's interval Drop is conducive to increase shredding impurity-eliminating effect, improves yield apart from setting less than normal；For opener dedoping step, using free strike, Shredding effect mitigates, easy damaged, Beater Speed are not set as 600 to fiber, avoids roller while enhancing shredding removal of impurities effect Flower-shape is returned into synnema, the gauge setting less than normal of hired roughneck and dirt stick, enhancing shredding removal of impurities effect；Gauge setting bigger than normal between dirt stick, Improve linters rate, enhancing removal of impurities effect；For more storehouse mixed processes, the revolving speed of pattern doffing roller is set as 412r/min, Da Shouzhuan Speed avoid it is excessively high, in order to avoid occur returning flower, at the same avoid because at the present hired roughneck of cotton block by repeating strike and excessively strike easily forms rope Silk and cotton-wool；For scutching cotton dedoping step, had using continuous blowing-carding feeding hopper working principle and carding machine licker-in point comb removal of impurities principle Machine combines, and is tiny flock to the preliminary shredding of the fiber of feeding, then beaten with combing generation flock, impurity is separated from fibrous inside Come；Meanwhile FA125 weight seperator is equipped with before opener, metal impurities are removed, mitigate the pressure of later process removal of impurities, clearly It is equipped with this special fine separator of crow after cotton machine, reduces the content of impurity, different fibre in cotton flow, cotton flow passes through blower and cotton carding pipe later Road connects hopper into FA179B Blowing carding, and uniform sheet cotton layer feeding cotton carding will be formed by uniform shredding, mixed fiber Machine, it is ensured that the continuous uniform of carding machine realizes carding procedure serialization for cotton；For the carding step of medium staple cotton, select FA203A type carding machine, since medium staple cotton is saw ginned cotton, length is short, and fiber strength is poor, but fibre uniformity is good, short flannel and containing miscellaneous It is less, therefore revolving speed is suitably reduced, hurt fiber less；

Step 4: pre-drawing: it is pre- for long-staple cotton and design, using 5 long-staple cotton card slivers carry out it is pre- simultaneously, long-staple cotton pre-drawing First quantitative design is 20.09g/5m, pre- for medium staple cotton and design, using 5 medium staple cotton card slivers carry out it is pre- simultaneously, medium staple cotton is pre- Just quantitative design is 21.03g/5m to drafting；

Step 5: item and rolling up: using 20 long-staple cotton pre-drawings and 4 medium staple cotton pre-drawings on draw frame and lap machine combined in rolls, Quantification of 64.49g/m at the beginning of combing rouleau, wherein 20 long-staple cotton pre-drawings are divided into 5 groups, it is every group 4,4 medium staple cottons are pre- Drafting is sequentially embedded between 5 groups of long-staple cotton pre-drawings；Using the high draft technique of comingling, it is vertical and horizontal rouleau had both been improved Uniformity coefficient, and improve the parallel degree of stretching of fiber, realize that rouleau unwinds clear, adhesion, road combing process pair after reduction The injury of cotton fiber；

Step 6: combing: using even number principle technique in Comb preparation procedure, hold rouleau by nipper when feeding combing machine In the cotton layer held, hook solid state, is more easier it by Cylinder Carding before most of hooked fibres remain as, thus stretch, it can Further decrease linters rate, to reduce the loss of fiber, Blood salvage；For reduce yarn cotton knot, combing machine use compared with Small gives cotton length, reduces carding isolation distance, enhances carding role, while paying attention to the connector of fiber, to improve the matter of output cotton net Amount；Yarn linters rate is controlled, loss is reduced, sufficiently excludes short flannel and impurity, improves the clarity of yarn cotton net, it is appropriate to drop Low sliver quantifies, and the bar evenness of yarn is improved using the method for slow train speed and reduction total draft multiple；Timing is clear Embossing and impurity in clean cylinder backlash, the impurity in top comb needle gap, and hairbrush is trimmed in time, to keep the flatness of hairbrush, The occurrence of reducing cotton net edge damage；

Step 7: drafting: according to odd number rule is used in mixing in doubling step, using one and closing principle, select with autoleveller Drawing frame, auto-leveling system use short-movie section, and neat and well spaced precision is high, and neat and well spaced range is wide, it is ensured that the on-line checking of sliver is protected Unevenness CV % is demonstrate,proved 2.5 hereinafter, cotton yarn made from 6 article of the 6th step is selected to carry out and close, for roller draft, selects curve Drafting process, for roller hold away from, in order to neither damage fiber, and can control the movement of most fibers, roller hold Away from the quality length for being greater than fiber is selected, using " tight gauge is pressurizeed " technological principle again, the item for being conducive to improve output yarn is dry The uniformity；For roller loading, roller loading needs that roller nip is kept to have enough curable grips, to overcome drafting force, prevents Yarn big sliding velocity lamination under roller nip, pressuring method are Spring cradle pressurization, and the gripping of front roller nip Power is set greater than rear roller；

Step 8: rove: including three processes, drawing-off: ripe bar attenuating being drawn and attenuated 8-10 times, stretches fiber in sliver further In parallel, it prepares for spun yarn drafting, using the double-short leather-ring drawing-off of four rollers, three draft area, the wherein drawing-off between 1-2 roller Multiple is set as 1.05 times, for Distribution Area, the condensers before Distribution Area is provided with, and selecting the bore of preceding condensers is 5,2-3 It is main drawing area between roller, condensers is not placed in main drawing area, realizes that constriction beam not drawing-off is not concentrated in drawing-off, is improved with reaching The purpose of bar evenness, to arrange condensation region between 3-4 roller, fiber after making main drawing area drawing-off is risen arranging condensation region It is acted on to boundling, the condensers after arranging condensation region and being provided with, and the bore of condensers is 12 after selecting, for drawing rollers It holds away from the size of drafting force is comprehensive in the uniformity and draft area depending on the quality length Lp of fiber, and referring to fiber Consider, do not open fibrous fracture or yarn drawing-off as principle, wherein the back zone between 3-4 roller is simple roller draft, It is held due to there is collector away from can suitably amplify, since the quality of pure cotton fiber is long using the process for big gauge of pressurizeing again Degree is 36mm, and the Distribution Area between 1-2 roller is held away from being set as 38mm, including roller diameter 28mm and gauge 10mm；Twisting: Yarn after drawing-off is added into the twist appropriate, makes rove that there is certain strength, prevents misdraft or break, rove twists system Number grasp slightly bigger than normal, is conducive to stable yarn quality, and actual production process selects roving twist factor 105；Winding shaping: will add The package for meeting necessarily required shapes and sizes is made on roving bobbin in reeling roving after twirl, to store, to carry and The feeding requirement of spinning frame is adapted to, four lower double-short leather-ring D type drawing-offs, preposition by the collector of main drawing area in use four, reality Row drawing-off is separated with boundling, length of floating area is reduced, to improve bar evenness；

Step 9: spun yarn: using the double draft area drawing-offs of three rollers, length apron, Suessen Pendulum Weighting Arm System, grid ring compact spinning, collection Middle vacuum cavitations select 2.7 pressure bar jaws, shorten free section length, to reduce floating fiber, reinforce to fiber movement Control improves Spinning Evenness；Proparea gauge is reduced, back zone gauge is amplified, reduces back zone drafting multiple, proparea is concentrated to lead Upper and lower cushion rubber is stretched outside under effective control of sliver, spun yarn proparea yarn density is improved, reduces scattering and disappearing for edge fibers and short flannel, Filoplume is effectively reduced, long details is reduced, improves strength；First break draft area uses curve drawing, and drafting multiple grasp less than normal is led before being It stretches area and the uniform yarn of structure is provided, using " tight gauge is pressurizeed " again, be conducive to the movement for controlling draft area fiber, improve defeated The uniformity of yarn out, first break draft area roller gauge use 38mm；Front draft zone Draft Configuration technique meet before, sieve of middle roller Drawing center uses 18mm away from principle small, that area of swimming is small and cushion rubber nip gauge is small, front draft zone roller gauge.

2. high-count pure cotton yarn production method according to claim 1, which is characterized in that the average grade 3.46 of long-staple cotton, Average length 36.75mm.

3. high-count pure cotton yarn production method according to claim 1, which is characterized in that the average grade 31 of medium staple cotton is put down Equal length 28.96mm.

4. high-count pure cotton yarn production method according to claim 1, which is characterized in that in the first step, when raw material is finished, connect The raw cotton of same batch production is used for raw cotton, is arranged wrap as standard arrangement using the identical place of production first, secondly considers technology grade, most Color characteristic grade is considered afterwards.

5. high-count pure cotton yarn production method according to claim 1, which is characterized in that the Xinjiang Long staple cotton is containing miscellaneous 2.2%.

6. high-count pure cotton yarn production method according to claim 1, which is characterized in that in second step, select Crosrol low Blowing-carding system containing miscellaneous raw cotton.

7. high-count pure cotton yarn production method according to claim 1, which is characterized in that in second step, opening or cleaning process difference Select that ABO automatic plucker carries out grabbing cotton, six storehouse cotton blender machine of 6CB is mixed and cleaned, tri- roller scutcher of 3RC cleans It carries out different fibre with mixing, the progress shredding of FCI fine opener and removal of impurities, this black special fine seperator and separates, opening or cleaning point setting 2 It is a.

8. high-count pure cotton yarn production method according to claim 1, which is characterized in that in third step, combed clearly using Qingdao Connection system.

9. high-count pure cotton yarn production method according to claim 1, which is characterized in that in third step, opening or cleaning process is selected Cotton is grabbed in the realization of FA009 reciprocation bale plucker, FA125 weight seperator realizes the removal of weight impurity, FA105A Single axial waste silk opener Realize that shredding and removal of impurities, FA029 multi-mixer realize that removal of impurities and shredding, Wu Site are realized in mixing and removal of impurities, FA116 scutcher Different fibre seperator realizes different fine separation.

10. high-count pure cotton yarn production method according to claim 1, which is characterized in that use E62 model essence in the 6th step Comb.