CN109652883A

CN109652883A - Cotton and stainless steel blended the electromagnetic shielding production method of yarn

Info

Publication number: CN109652883A
Application number: CN201910061158.2A
Authority: CN
Inventors: 宋娟; 苏旭中; 刘新金
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2019-04-19
Anticipated expiration: 2039-01-23
Also published as: CN109652883B

Abstract

本发明公开了棉和不锈钢混纺电磁屏蔽用纱的生产方法，采用不锈钢纤维以短纤状态与棉纤维进行混纺而成，将不锈钢长丝束经一台并条机两次牵伸切断得到主体长度与棉纤维相近的不锈钢短纤，其中并条机包括左、右牵伸系统，左牵伸系统的中上胶辊采用小直径胶辊，不锈钢长丝束首先由左牵伸系统进行第一次的牵切，从而牵切成主体平均长度等于后罗拉对和前罗拉对之间中心距的不锈钢短纤维，再经右牵伸系统进行第二次的牵切，从而将牵切成主体平均长度等于后罗拉对和中罗拉对之间中心距的不锈钢短纤维，将不锈钢短纤维束与棉精梳条经三道并条制得棉/不锈钢混合条，并再依次经粗纱、细纱制得棉/不锈钢混纺电磁屏蔽用纱。The invention discloses a production method of cotton and stainless steel blended electromagnetic shielding yarn. Stainless steel staple fibers similar to cotton fibers, in which the draw frame includes left and right drafting systems, the middle and upper rubber rollers of the left drafting system use small diameter rubber rollers, and the stainless steel filament bundles are firstly processed by the left drafting system so that the average length of the main body is equal to the center distance between the back roller pair and the front roller pair, and then the second time is drawn by the right drafting system, so that the average length of the main body is cut into the average length of the main body. The stainless steel staple fibers equal to the center distance between the rear roller pair and the middle roller pair are made by three-pass drawing of stainless steel staple fiber bundles and cotton combed sliver to obtain a cotton/stainless steel mixed sliver, and then through roving and spun yarn in turn to obtain cotton /Stainless steel blended yarn for electromagnetic shielding.

Description

Cotton and stainless steel blended the electromagnetic shielding production method of yarn

Technical field

The invention belongs to textile technology field, it is related to a kind of spinning method for genuine of new function yarn, specially cotton and stainless The production method of steel reinforced concrete spinning electromagnetic shielding yarn.

Background technique

Stainless steel fibre is a kind of novel textile fabric, due to its with good electric conductivity, high temperature resistant, spinnability and Economy is commonly used for antistatic and Electromagnetically shielding fabrics production.Use of the stainless steel fibre in textile industry be mainly It is blended with common textile fibers progress, it is added in fore-spinning in the form of staple fiber, or added with filament state in spun yarn process Enter.No matter stainless steel fibre is to exist in what manner in the fabric, and the fabric of production all has preferable electromagnetic wave shielding Energy.

When stainless steel fibre is mixed with other fibers, especially in the form of stainless steel short fiber with other staple fibers When being mixed, due to the property of stainless steel fibre and other atural staple fibres or cellulose fibre with excellent wearability Property differ greatly so that between each other mixing when mixing uniformity it is more difficult to control so that finally spun Yarn in stainless steel fibre be unevenly distributed, the effectiveness of road fabric after then influencing.

Summary of the invention

The technical issues of solution: for overcome the deficiencies in the prior art, the present invention by stainless steel filament beam at one Crush cutting twice is carried out on drawing frame, so that more accurate to the length of stainless steel filament and uniform cutting is realized, thus real The more uniform mixing of two kinds of fibers, improves the electricity of mixed yarn in the now final blended electromagnetic shielding yarn of spun cotton/stainless steel Magnetic Shielding Effectiveness；The present invention provides the production methods of cotton and the blended electromagnetic shielding yarn of stainless steel.

Technical solution: the production method of cotton and the blended electromagnetic shielding yarn of stainless steel, by cotton fiber and stainless steel short fiber Blended to form, successively cotton yarn is made through Blowing carding, combing process in cotton fiber, by stainless steel filament beam through drawing frame Drawing-off twice is cut off to obtain stainless steel short fiber beam, after wherein drawer drafting system is rear bottom roll and rear upper glue roller composition Roller is to the middle roller of, middle bottom roller and middle upper glue roller composition to the three of the front roller pair of, preceding bottom roll and preceding upper glue roller composition Roller double draft structure, including left drafting system and right drafting system, wherein the middle upper glue roller of left drafting system is using small straight Diameter rubber roller, so that hanging between the middle upper glue roller and middle bottom roller of left drafting system, stainless steel filament Shu Shouxian is in drafting Between the rear roller pair and front roller pair of the left drafting system of machine carry out first time crush cutting, thus by stainless steel filament beam not Become rusty the crush cutting of steel long filament at main body average length be equal between rear roller pair and front roller pair bottom roll center away from the short fibre of stainless steel Dimension, obtains the first stainless steel short fiber beam, then by the short fibre Shu Yici of the first stainless steel after the right drafting system of drawing frame Roller to and middle roller to, middle roller to and front roller to carrying out second of crush cutting, and the rear roller pair of right drafting system and in Bottom roll center between roller pair is away from being equal to middle roller to the bottom roll center between front roller pair away from thus not by first Under the stainless steel short fiber crush cutting become rusty in steel staple fiber beam is equal between rear roller pair and middle roller pair at main body average length The stainless steel short fiber of ratch then obtains required stainless steel short fiber beam, then by stainless steel short fiber beam with Cotton/stainless steel blended sliver is made through three draftings in cotton yarn, and the blended electricity of cotton/stainless steel successively is made through rove, spun yarn again Magnetic screen yarn, comprises the following production steps that

The cotton packet matched is emitted on the conveyer belt of reciprocation bale plucker two sides, through reciprocating by the first step in proportion The crawl for the cotton fiber in cotton packet that the mobile realization of the circulation reciprocating type of griping cotton machine has been discharged, the cotton fiber grabbed in proportion are first First be fed in multifunctional separator, in multifunctional separator by the flexible bodies such as rigid bodies and fiber such as bulk impurity it Between gravity difference to separating and remove the impurity of bulk；The cotton fiber exported through multifunctional separator is then fed to In multi-mixer, in multiple hoppers of multi-mixer by griping cotton machine grab each cotton packet in different lot numbers and the place of production Cotton fiber the time for moving to point it is different, to realize the immixture of the cotton fiber in different lot numbers and the place of production, together When in the motion process of cotton fiber using negative pressure gas flow effect by lesser blocky rigid impurity in cotton fiber or tiny Flexible impurity carry out separation removing；The cotton fiber exported through multi-mixer is then fed into kirschner beater scutcher, In scutcher, mixed cotton fiber realizes the strike shredding effect under free state under the action of kirschner beater, thus By cotton fiber by biggish block structure by strike shredding at lesser blocky or fiber bundle-like, while in the cotton of scutcher In case, by the control of the cotton fiber height to feeding, to realize cotton under the gravity of the cotton fiber fed in hopper The output of the thickness, the cotton layer of uniform quality in bottom portion；Cotton layer through scutcher output is then fed into different fine machine, different Under the action of double high-definition cameras in fine machine, the fiber in cotton layer carries out the shooting under single fiber shape, and by scheming accordingly As foreign fiber mixed in fiber is ejected by processing technique under the action of high-speed spray gun, thus by mixed in cotton fiber Foreign fiber is removed；Cotton layer through different fine machine output is then fed into heavy-duty machine, in the high speed gas of heavy-duty machine Impurity tiny in cotton fiber is further removed under stream effect, while cotton fiber is pressed into uniform cotton layer output； The cotton layer uniformly exported is then fed into carding machine, in carding machine, the cotton of uniform feeding layer first by feed roll motor and It closely presses between feed plate, is exported in the case where the rotation of feed roll motor drives, the cotton fiber tail end in the cotton layer of output is given cotton Closely pressed between roller and feed plate, head end constantly held by licker-in under point comb, and as the rotation of feed roll motor makes It obtains cotton fiber constantly to be stripped by licker-in, the cotton fiber stripped by licker-in then constantly compares licker-in by diameter with the rotation of licker-in The big cylinder of diameter strips, and is provided with removable cover on the excircle of cylinder, with the relative rotation of cylinder and removable cover, Realize to the cotton fiber stripped by cylinder in a free state freely divide comb, while being provided with fixation on the excircle of cylinder Cover board, under the fixed function of fixed cover board, so that the cotton fiber on cylinder surface will not be detached from cylinder under the action of the centrifugal force Surface perimeter is provided with the doffer device smaller than cylinder diameter with diameter, under the rotation of doffer, cylinder in the other side of cylinder On a part of cotton fiber stripped by doffer, remaining polyester fiber continues to carry out freely divide with the rotation of cylinder to comb up to quilt Doffer strips, and is led cotton device after pattern doffing roller strips by the cotton fiber that doffer strips and is pressed into item by large pressuring roller, to obtain The cotton carded sliver is pressed the cotton carded sliver in stripes and is constantly wound onto bar cylinder through can coiler；Through carding machine output the cotton carded sliver with After be fed in pre-drawing machine, be fed into pre-drawing machine jointly using 6 cotton carded slivers, so that 6 cottons of feeding are raw Item is stretched and attenuates under the action of the drafting force of the drafting system of pre-drawing machine, is then stretched 6 one threads to attenuate again It carries out and closes in the parallel state, to obtain the quantitative cotton with the quantitative differences of the cotton carded sliver of feeding within 10% in advance simultaneously Item, and the bar evenness for the cotton pre-drawing being effectively improved in coalescence process；The cotton pre-drawing exported through pre-drawing machine It is then fed into and rolls up in combination machine, be fed into jointly using 24-28 root cotton pre-drawing and roll up in combination machine, so that feeding The cotton pre-drawing entered and under the action of roll up the drafting force of drafting system of combination machine, attenuated by slight stretching, thus by cotton Cotton fiber in pre-drawing further stretches, then again parallel by the cotton pre-drawing of slight drawing-off and close and obtain straightening of fibers The cotton roll that degree is more preferable, quality is more uniform, to realize the preparation process before combing；Through and roll up combination machine output cotton roll it is subsequent Be fed in combing machine, be fed into combing machine jointly using 8 cotton rolls, thus by the cotton roll of feeding high draft power work It is stretched again under and attenuates to obtain cotton yarn, during high draft, realize and the depth of the cotton fiber in cotton roll is combed On the other hand effect will on the one hand further remove the tiny impurity in cotton fiber in depth carding process The shorter cotton fiber of length, which separates, to be removed, thus the consistency of the length of the cotton fiber in cotton yarn obtained by greatly improving；

Stainless steel filament beam is fed into the first drawing frame by second step, the drawing-off twice through same the first drawing frame Cutting obtains stainless steel short fiber beam, wherein the first drawing frame includes drafting system, drafting system includes left drafting system and the right side Drafting system, left drafting system is identical with the structure of right drafting system, the rear roller formed including rear bottom roll and rear upper glue roller To, the middle roller that is made of middle bottom roller and middle upper glue roller to, the front roller pair that is made of preceding bottom roll and preceding upper glue roller, Zuo Qian Stretch the rear bottom roll of system and right drafting system, the size and structure of rear upper glue roller, middle bottom roller, preceding bottom roll, preceding upper glue roller Completely the same, the diameter of the middle upper glue roller of left drafting system is less than the diameter of the middle upper glue roller of right drafting system, and left drawing-off Center between system and the rear roller pair and middle roller pair of right drafting system is away from being equal to middle roller between front roller pair Center between the rear bottom roll and rear upper glue roller of right drafting system away from equal to the average length of cotton fiber, in use, closely press It is closely closely pressed between pressing, preceding bottom roll and preceding upper glue roller between pressure, middle bottom roller and middle upper glue roller, left drafting system It is closely pressed between bottom roll and rear upper glue roller afterwards, hanging, preceding bottom roll and preceding upper glue roller between middle bottom roller and middle upper glue roller Between closely press, and left drafting system is connected with the rear bottom roll integration of right drafting system, middle bottom roller integration connection, Preceding bottom roll integration connection, so that the rear bottom roll of left drafting system and right drafting system, middle bottom roller, preceding bottom roll Revolving speed be consistent it is stainless using 6 so that left drafting system is identical with the total draft multiple of right drafting system The horn mouth at the steel endless tow rear roller pair rear portion through left drafting system jointly feeds left drafting system, 6 stainless steels of feeding The rear end of endless tow by left drafting system rear roller pair pressing, front end by the front roller of left drafting system to pressing, thus Under the action of the drafting force generated under the total draft multiple of left drafting system, so that left drawing-off of the stainless steel filament beam in drawing frame The drawing-off cutting that first time is carried out between the rear roller pair and front roller pair of system, thus by the stainless steel in stainless steel filament beam Long filament crush cutting at main body average length be equal between rear roller pair and front roller pair center away from stainless steel short fiber, to obtain First stainless steel short fiber beam, by 6 first stainless steel short fiber Shu Gongtong obtained after the rear roller pair of right drafting system The horn mouth in portion feeds right drafting system, and 6 first rear ends stainless steel short fiber Shu Shouxian of feeding are by after right drafting system Roller to pressing, front end by the middle roller of right drafting system to pressing, thus the drawing-off times in the first break draft area of right drafting system Under the action of the drafting force of several lower generations, so that rear roller pair of the first stainless steel short fiber beam in the right drafting system of drawing frame Carry out secondary drawing-off cutting between middle roller pair, and after after the stainless steel short fiber beam that is cut off through second of drawing-off End by the middle roller of right drafting system to pressing, front end by the front roller of right drafting system to pressing, thus in right drafting system Front draft zone drafting multiple under under the action of the drafting force that generates, drawing frame right drafting system middle roller to it is preceding The drawing-off cutting that third time is carried out between roller pair, thus the drafting force finally generated under the total draft multiple of right drafting system Under the action of, so that right drafting system of the first stainless steel short fiber beam in drawing frame, not by the first stainless steel short fiber beam Steel staple fiber crush cutting of becoming rusty is equal between the rear roller pair and middle roller pair of right drafting system at main body average length or middle roller To the center between front roller pair away from stainless steel short fiber, then obtain required stainless steel short fiber beam；

Stainless steel short fiber Shu Gongtong made from cotton yarn made from the first step and second step is fed into the by third step In two drawing frames, the drawn down through the second drawing frame simultaneously closes immixture and obtains the first cotton/stainless steel blended sliver, wherein feeding The quantity of the cotton yarn entered and the quantity of stainless steel short fiber beam are according to the blended electromagnetic shielding of cotton/stainless steel finally spinned The number of the cotton yarn and stainless steel short fiber beam that are determined, and fed with the blending ratio of cotton fiber and stainless steel short fiber in yarn The sum of amount is less than or equal to 8, and the total draft multiple of the second drawing frame and the cotton yarn and stainless steel short fiber beam of feeding is arranged The sum of quantity difference within ± 10% so that the cotton yarn and stainless steel short fiber beam of feeding are in the second drafting Make to send out between the fiber in cotton yarn and stainless steel short fiber beam under the action of the drafting force that the total draft multiple of machine generates Raw mutual phorogenesis, attenuates, while the cotton yarn and stainless steel short fiber Shu Jinhang to attenuate that be stretched to be stretched It is parallel and close, thus the immixture under realizing the parastate of cotton fiber and stainless steel short fiber；Then by obtained first Cotton/stainless steel blended sliver is fed into third drawing frame, and drawn down, parallel amalgamation through third drawing frame obtain second Wherein the first cotton fed/stainless steel blended sliver quantity is less than or equal to 6, and third drawing frame is arranged in cotton/stainless steel blended sliver Total draft multiple and feeding the first cotton/stainless steel blended sliver quantity difference within ± 8% so that feeding First cotton/stainless steel blended sliver makes the first cotton/no under the action of the drafting force that the total draft multiple of third drawing frame generates Mutual phorogenesis occurs between fiber in rust steel blended sliver, attenuates to be stretched, while the first cotton that attenuates of being stretched/ Stainless steel blended sliver is carried out parallel and is closed, so that under the parastate in obtained second cotton/stainless steel blended sliver The line density of cotton fiber beam and stainless steel short fiber beam reduces, quantity increases, to realize cotton fiber and the short fibre of stainless steel indirectly More uniform careful mixing under the parastate of dimension；The second cotton obtained/stainless steel blended sliver is then fed into the 4th simultaneously In machine, drawn down, parallel amalgamation through the 4th drawing frame obtain third cotton/stainless steel blended sliver, wherein feed Second cotton/stainless steel blended sliver quantity is less than or equal to 4, and the total draft multiple of the 4th drawing frame is arranged and feeds second The difference of cotton/stainless steel blended sliver quantity is within ± 5%, so that the second cotton/stainless steel blended sliver of feeding is the To occur between fiber in the second cotton/stainless steel blended sliver under the action of the drafting force that the total draft multiple of four drawing frames generates Mutual phorogenesis, attenuates to be stretched, while the second cotton/stainless steel blended sliver to attenuate that is stretched carries out in parallel simultaneously It closes, so that cotton fiber beam and stainless steel short fiber under the parastate in obtained third cotton/stainless steel blended sliver The line density of beam reduces, quantity increases, thus indirectly more uniform under the parastate of realization cotton fiber and stainless steel short fiber Careful mixing；

The cotton of third made from third step/stainless steel blended sliver is fed into fly frame, the drawing-off through fly frame by the 4th step Drawing-down, the twisting effect of entwining obtain cotton/stainless steel blended roving, wherein using 1 third cotton/stainless steel blended sliver feeding, and The drafting multiple of fly frame is set between 5-10, thus under the action of the drafting force that the total draft multiple of fly frame generates, So that mutual phorogenesis occurs between fiber in third cotton/stainless steel blended sliver of feeding, attenuates to be stretched, drawn Third cotton/stainless steel the blended sliver to attenuate is stretched under the action of fly frame twists the twist, so that in the fiber generation in blended sliver Outer transferance, to realize the immixture of cotton fiber and stainless steel short fiber under inside and outside transfer, cotton fiber and stainless Steel staple fiber occur in inside and outside transfer process it is mutual entwine, to obtain having cotton/stainless steel of certain strength blended thick Yarn；Then cotton obtained/stainless steel blended roving is fed into spinning frame, drawn down through spinning frame, twisting are entwined work With obtaining the final required blended electromagnetic shielding yarn of cotton/stainless steel, wherein using 1 cotton/stainless steel blended roving feeding, and According to the cotton of feeding/stainless steel blended roving is quantitative and the blended electromagnetic shielding yarn of cotton/stainless steel of required spinning quantifies The total draft multiple for determining spinning frame is calculated, thus under the action of the drafting force that the total draft multiple of spinning frame generates, so that Mutual phorogenesis occurs between fiber in the cotton of feeding/stainless steel blended roving, attenuates to be stretched, is stretched and attenuates Cotton/stainless steel blended roving under the action of spinning frame twists the twist so that inside and outside turn occurs for the fiber in mixing rove Shifting effect, thus realize the immixture of cotton fiber and stainless steel short fiber under inside and outside transfer, cotton fiber and the short fibre of stainless steel Dimension generation in inside and outside transfer process is mutual to entwine, to obtain the blended electromagnetic shielding of cotton/stainless steel with certain strength Use yarn.

Preferably, wherein cotton fiber using averagely spinning the long 29.28mm of steady parameter 132, mic value 4.13, upper half, whole Neat degree 82.4%, short fiber index 15.73%, breaking strength 30.53cN/dtex, aqueous 7.29% 40816-65 U.S. cotton fiber With it is average spin steady parameter 137, mic value 4.71, the long 29.88mm of upper half, uniformity 83.42%, short fiber index 13.09%, Breaking strength 30.7cN/dtex, aqueous 8.29% 40892-62 U.S. cotton fiber.

Preferably, stainless steel short fiber is obtained by crush cutting process of the stainless steel filament Shu Jing on same drawing frame.

Preferably, 40 μm of the average fineness of stainless steel filament beam, line density 9.5dtex, ultimate strength 98.85cN, fracture Elongation 29.54% colludes with strength 157.85cN, colludes with elongation 0.69%.

Preferably, the main body average length and cotton fiber average length of the stainless steel short fiber in stainless steel short fiber beam are poor It is different within ± 5%.

Preferably, in the first step, the mechanical total draft multiple of pre-drawing machine is 6-6.3.

Preferably, in the first step, and the drafting multiple for rolling up combination machine is 2-2.5.

Preferably, in the first step, the mechanical total draft multiple of combing machine is in 100-115.

Preferably, in second step, the average bulk length and cotton fiber of the stainless steel short fiber in stainless steel short fiber beam Average length difference is within ± 5%.

Preferably, in second step, in second step, the total draft multiple of left drafting system and right drafting system is between 5-6.

The utility model has the advantages that the production method of cotton of the present invention and the blended electromagnetic shielding yarn of stainless steel pass through it is long to stainless steel Tow carries out crush cutting twice on a drawing frame, to realize more accurate to the length of stainless steel filament and uniformly cut It is disconnected, to realize the mixing that two kinds of fibers are more uniform in the blended electromagnetic shielding yarn of cotton/stainless steel finally spun, improve mixed The effectiveness of spinning.

Specific embodiment

Following embodiment further illustrates the contents of the present invention, but should not be construed as limiting the invention.Without departing substantially from In the case where spirit of that invention and essence, to modification made by the method for the present invention, step or condition and replaces, belong to the present invention Range.Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.

Embodiment 1

With FA507A ring spinning frame spinning it is blended be 70/30, line density 21^SThe blended electromagnetism of cotton/stainless steel For shielding yarn.

(1) process flow and machine type selecting

Cotton: BO-A type automatic plucker → SP-MF multifunctional separator → MX-I6 multi-mixer → CL-C1 card wire is beaten The different fine machine → SP-DX heavy-duty → TC5-1C carding machine → FA313B pre-drawing machine → CL15 item of hand scutcher → YQ600H is simultaneously Roll up combination machine → CJ-60 combing machine

Stainless steel filament beam: HSR1000 drawing frame (drafting system is engineered, carries out feeding crush cutting twice)

Cotton yarn+stainless steel short fiber beam: HSR1000 drawing frame (three) → JWF1415 fly frame → QFA1528 is thin Yarn machine

(2) key process parameter designs

Cotton carding

1 carding process of table

Cotton pre-drawing

2 pre-drawing technique of table

Sliver is simultaneously rolled up

3, table simultaneously rolls up drawing-off design

Cotton combing

The design of 4 combing of table

Drafting

5 drawing process allocation list of table

Rove

6 process of roving of table

Spun yarn

7 spinning process of table

(3) yarn quality is tested

Yarn quality under the different twist factors of table 8

Claims

1. the production method of cotton and stainless steel blended electromagnetic shielding yarn, is characterized in that, is formed by blending cotton fiber and stainless steel short fiber, and cotton fiber is successively through cleaning and combing, combing operation to obtain cotton combed sliver, and stainless steel is long. The tow is cut twice by a drawing frame to obtain stainless steel short fiber bundles, wherein the drawing frame drafting system is a rear roller pair composed of a rear bottom roller and a rear upper rubber roller, a middle lower roller and a middle upper rubber roller The three-roller double-zone drafting structure of the front roller pair composed of the middle roller pair, the front bottom roller and the front upper rubber roller, including the left drafting system and the right drafting system, in which the middle and upper rubber roller of the left drafting system adopts Small diameter cots, so that the middle upper cots and middle lower rollers of the left drafting system are suspended in the air, and the stainless steel filament bundles first pass between the rear roller pair and the front roller pair of the left drafting system of the draw frame. One pull cut, so that the stainless steel filaments in the stainless steel filament bundle are cut into stainless steel staple fibers with the average length of the main body equal to the center distance of the bottom rollers between the back roller pair and the front roller pair to obtain the first stainless steel short fiber bundle, and then The first stainless steel staple fiber bundle is drawn for the second time on the back roller pair, middle roller pair, middle roller pair and front roller pair of the right drafting system of the drawing frame in turn, and the back roller pair of the right drafting system and the The center distance of the bottom rollers between the middle roller pair is equal to the center distance of the bottom rollers between the middle roller pair and the front roller pair, so that the stainless steel short fibers in the first stainless steel short fiber bundle are drawn into the main body with an average length equal to the back roller pair and the The stainless steel staple fibers with the center distance of the bottom rollers between the middle roller pairs, and then the required stainless steel staple fiber bundles are obtained, and then the stainless steel staple fiber bundles and the cotton combed sliver are drawn through three passes to obtain a cotton/stainless steel mixed sliver, and Then, the cotton/stainless steel blended electromagnetic shielding yarn is obtained through the roving and the spun yarn in turn, including the following production steps:

The first step is to discharge the selected cotton bales on the conveyor belts on both sides of the reciprocating cotton grabbing machine in proportion, and realize the grabbing of the cotton fibers in the discharged cotton bale through the reciprocating and reciprocating movement of the reciprocating cotton grabbing machine. The cotton fibers captured in proportion are first fed into the multi-functional separator, where the bulk impurities are separated by the difference in gravity between rigid bodies such as bulk impurities and flexible bodies such as fibers. The cotton fiber output by the multi-functional separator is then sent to the multi-silo cotton blender, and the different batch numbers in the cotton bales are grabbed by the cotton picker in the multiple cotton boxes of the multi-silo cotton blender. The time between the movement of cotton fibers from the origin and the confluence point is different, so as to realize the mixing effect of cotton fibers of different batches and origins. Rigid impurities or small flexible impurities are separated and removed; the cotton fibers output by the multi-silo cotton blender are then sent to the carding and beater cleaning machine. Under the action, the blowing and opening effect in the free state is realized, so that the cotton fiber is opened from the larger block structure into smaller blocks or fiber bundles, and at the same time in the cotton box of the cotton cleaner, By controlling the height of the fed cotton fiber, the output of the cotton layer with uniform thickness and quality at the bottom of the cotton box is realized under the gravity of the cotton fiber fed in the cotton box; It is sent to the foreign fiber machine. Under the action of the double high-definition cameras in the foreign fiber machine, the fibers in the cotton layer are photographed in the form of single fibers, and the foreign fibers mixed in the fibers are processed at high speed through the corresponding image processing technology. Under the action of the spray gun, it is sprayed out, so as to remove the foreign fibers mixed in the cotton fibers; the cotton layer output by the foreign fiber machine is then sent to the strong dust collector, and the cotton fibers are removed under the action of the high-speed airflow of the strong dust remover. The fine impurities are further removed, and at the same time, the cotton fibers are pressed into a uniform cotton layer for output; the uniformly output cotton layer is then sent to the carding machine, where the evenly fed cotton layer is first fed. The cotton roller and the cotton feeding board are pressed tightly, and the output is driven by the rotation of the cotton feeding roller. The tail end of the cotton fiber in the output cotton layer is tightly pressed between the cotton feeding roller and the cotton feeding board, and the head end is continuously driven by the licker-in. Carding under the grip of the licker-in, and with the rotation of the feed roller, the cotton fibers are continuously stripped by the licker-in, and the cotton fibers stripped by the licker-in are continuously removed with a diameter larger than the diameter of the licker-in as the licker-in rotates. The outer circumference of the cylinder is provided with a movable cover plate. With the relative rotation of the cylinder and the movable cover plate, the free carding of the cotton fiber stripped by the cylinder in a free state is realized. At the same time, a fixed cover is arranged on the outer circumference of the cylinder. Under the fixed action of the fixed cover, the cotton fibers on the surface of the cylinder will not be separated from the surface circumference of the cylinder under the action of centrifugal force. On the other side of the cylinder There is a doffer device with a diameter smaller than the diameter of the cylinder. Under the rotation of the doffer, a part of the cotton fiber on the cylinder is stripped off by the doffer, and the remaining polyester-cotton fibers continue to be freely carded with the rotation of the cylinder until the doffer is rotated. Stripping, the cotton fiber stripped by the doffer is stripped by the stripping roller and then passed through the cotton guide The sliver is pressed into sliver by the large pressure roller to obtain the cotton sliver, and the cotton sliver that is pressed into the sliver is continuously wound on the sliver through the coiler; the cotton sliver output by the carding machine is then sent to the In the pre-draw frame, 6 cotton slivers are fed into the pre-draw frame together, so that the fed 6 cotton slivers are drawn under the action of the drafting force of the pre-draw frame's drafting system. The 6 slivers that have been stretched and thinned are then combined again in a parallel state, so as to obtain a cotton pre-draw sliver with a quantitative difference between the sliver and the fed cotton sliver within 10%, and the sliver is combined. In the process of combining, the evenness of the obtained cotton pre-draw frames can be effectively improved; the cotton pre-draw frames output by the pre-draw frame are then sent to the doubling machine, and 24-28 cotton pre-draw frames are fed together. It is fed into the doubling machine, so that the fed cotton pre-draw frame is slightly stretched and thinned under the action of the drafting force of the drafting system of the doubling machine, so that the cotton pre-draw sliver is drawn. The cotton fiber is further straightened, and then the slightly drafted cotton pre-draw frame is re-parallel and merged to obtain a lap with better fiber straightness and more uniform quality, so as to realize the preparation process before combing; The output lap is then sent to the comber, and 8 laps are used to jointly feed into the comber, so that the fed lap is stretched and thinned again under the action of large drafting force. Cotton combed sliver, in the large drafting process, realizes the deep carding effect on the cotton fibers in the cotton lap, so that in the deep carding process, on the one hand, the fine impurities in the cotton fibers are further removed, and on the other hand, Cotton fibers with shorter lengths are separated and removed, thereby greatly improving the consistency of the length of cotton fibers in the resulting cotton combed sliver;

In the second step, the stainless steel filament bundle is fed into the first drawing frame, and the stainless steel short fiber bundle is obtained by two drafting cuts of the same first drawing frame, wherein the first drawing frame includes a drafting system, The drafting system includes a left drafting system and a right drafting system. The structure of the left drafting system and the right drafting system is the same, including a rear roller pair composed of a rear bottom roller and a rear top rubber roller, and a middle bottom roller and a middle rubber roller. Middle roller pair consisting of rollers, front roller pair consisting of front lower roller and front upper rubber roller, rear lower roller, rear upper rubber roller, middle lower roller, front lower roller, front The size and structure of the top cots are exactly the same. The diameter of the middle and top cots of the left drafting system is smaller than the diameter of the middle and upper cots of the right drafting system, and the back rollers of the left drafting system and the right drafting system are the same The center distance between the middle roller pair is equal to the center distance between the middle roller pair and the front roller pair, which is equal to the average length of the cotton fiber. Tight pressing between the middle bottom roller and the middle top rubber roller, tight pressing between the front bottom roller and the front upper rubber roller, tight pressing between the rear bottom roller and the rear upper rubber roller of the left drafting system, tight pressing between the middle bottom roller and the middle upper rubber roller The rubber rollers are suspended in the air, the front bottom roller and the front upper rubber roller are tightly pressed, and the rear bottom rollers of the left drafting system and the right drafting system are integratedly connected, the middle and bottom rollers are integrated, and the front and bottom rollers are integrated. , so that the rotation speed of the rear bottom roller, middle bottom roller and front bottom roller of the left drafting system and the right drafting system are consistent, so that the total drafting ratio of the left drafting system and the right drafting system is exactly the same, using 6 The stainless steel filament bundles are fed into the left drafting system through the rear bell mouth of the back roller pair of the left drafting system. The rear ends of the fed 6 stainless steel filament bundles are pressed by the back roller pair of the left drafting system. The front end is pressed by the front roller of the left drafting system, so that under the action of the drafting force generated under the total drafting multiple of the left drafting system, the stainless steel filament bundles are placed on the rear roller of the left drafting system of the drawing frame. The first drafting cut is performed between the pair and the front roller pair, so that the stainless steel filaments in the stainless steel filament bundle are drawn into stainless steel staple fibers with an average length of the main body equal to the center distance between the back roller pair and the front roller pair. Thereby, the first stainless steel short fiber bundle is obtained, and the six first stainless steel short fiber bundles are fed into the right drafting system through the rear roller of the right drafting system to the rear bell mouth, and the fed six first stainless steel short fiber bundles. First, the rear end of the stainless steel staple fiber bundle is pressed by the pair of rear rollers of the right drafting system, and the front end is pressed by the pair of middle rollers of the right drafting system, so that the draft produced under the drafting multiple of the rear drafting area of the right drafting system Under the action of the force, the first stainless steel short fiber bundle is subjected to the second drafting cut between the rear roller pair and the middle roller pair of the right drafting system of the drawing frame, and then the second drafting cut is obtained. The rear end of the stainless steel staple fiber bundle is pressed by the middle roller pair of the right drafting system, and the front end is pressed by the front roller pair of the right drafting system, so that the drafting force generated under the drafting multiple of the front drafting area of the right drafting system Under the action of the drawing frame, the third drafting cut is performed between the middle roller pair and the front roller pair of the right drafting system of the drawing frame, so that the right drafting is finally performed. Under the action of the drafting force generated under the total drafting ratio of the system, the first stainless steel short fiber bundle is drawn in the right drafting system of the drawing frame, and the stainless steel short fiber of the first stainless steel short fiber bundle is drawn into the average length of the main body. The stainless steel staple fibers equal to the center distance between the rear roller pair and the middle roller pair or between the middle roller pair and the front roller pair of the right drafting system, and then obtain the required stainless steel staple fiber bundle;

In the third step, the cotton combed sliver obtained in the first step and the stainless steel short fiber bundle obtained in the second step are fed into the second drawing frame, and are drawn and drawn by the second drawing frame. The first cotton/stainless steel mixed sliver is obtained by combining and mixing, wherein the number of fed cotton combed sliver and the number of stainless steel short fiber bundles are based on the cotton fiber and stainless steel short fiber in the final spun cotton/stainless steel blended electromagnetic shielding yarn. The blending ratio of fibers is determined, and the sum of the number of fed cotton sliver and stainless steel short fiber bundle is less than or equal to 8, and the total draft ratio of the second draw frame is set to be the same as the fed cotton sliver and stainless steel short fiber bundle. The difference in the sum of the number of fiber bundles is within ±10%, so that the fed cotton combed sliver and stainless steel staple fiber bundles make the cotton essence under the action of the draft force generated by the total draft multiple of the second draw frame. The fibers in the sliver and the fibers in the stainless steel short fiber bundle interact with each other, so that they are stretched and thinned. The mixing action of fibers and stainless steel staple fibers in a parallel state; then the first cotton/stainless steel mixed sliver produced is fed into the third drawing frame, and the third drawing frame is drawn to draw, parallel and cooperate. Obtain the second cotton/stainless steel mixed sliver with The difference in quantity is within ±8%, so that the first cotton/stainless steel mixed sliver is fed within the The mutual sliding action occurs between the fibers, so that they are stretched and thinned, and the first cotton/stainless steel mixed strips that are stretched and thinned are merged in parallel, so that the obtained second cotton/stainless steel mixed strips are The linear density of the cotton fiber bundles and the stainless steel short fiber bundles in the parallel state is reduced and the number is increased, thereby indirectly realizing more uniform and meticulous mixing of the cotton fibers and the stainless steel short fiber bundles in the parallel state; and then the second cotton/stainless steel produced The mixed sliver is fed into the fourth drawing frame, and the third cotton/stainless steel mixed sliver is obtained through the drawing, thinning, parallel and synergistic action of the fourth drawing frame, wherein the quantity of the second cotton/stainless steel mixed sliver fed Less than or equal to 4, and the difference between the total draft multiple of the fourth draw frame and the number of the fed second cotton/stainless steel mixed sliver is within ±5%, so that the fed second cotton/stainless steel mixed sliver is within ±5%. Under the action of the drafting force generated by the total drafting multiple of the fourth drawing frame, the fibers in the second cotton/stainless steel mixed sliver interact with each other, thereby being stretched and thinned. The second cotton/stainless steel mixed strips are combined in parallel, so that the linear density of the cotton fiber bundles and the stainless steel short fiber bundles in the parallel state in the obtained third cotton/stainless steel mixed strips is reduced and the number is increased, thereby indirectly To achieve more uniform and meticulous mixing of cotton fibers and stainless steel staple fibers in a parallel state;

In the fourth step, the third cotton/stainless steel mixed sliver obtained in the third step is fed into the roving frame, and the cotton/stainless steel mixed roving is obtained through the drafting, thinning, twisting and entangling of the roving frame, and 1 of which is used. The third cotton/stainless steel mixed sliver is fed, and the draft ratio of the roving frame is set between 5-10, so that under the action of the drafting force generated by the total draft ratio of the roving frame, the fed third cotton The fibers in the mixed sliver of /stainless steel interact with each other, so that they are stretched and thinned. The fibers undergo internal and external transfer, so as to realize the mixing effect of cotton fibers and stainless steel staple fibers under the internal and external transfer. Cotton fibers and stainless steel staple fibers are intertwined during the internal and external transfer process, so as to obtain a strong cotton/stainless steel blend. roving; then the obtained cotton/stainless steel blended roving is fed into the spinning frame, and the final desired cotton/stainless steel blended electromagnetic shielding yarn is obtained through the drawing, thinning, twisting and entanglement of the spinning frame. The cotton/stainless steel blended roving is fed, and the total draft ratio of the spinning frame is determined according to the quantitative calculation of the fed cotton/stainless steel blended roving and the quantitative calculation of the cotton/stainless steel blended electromagnetic shielding yarn to be spun. Under the action of the drafting force generated by the total drafting ratio of the machine, the fibers in the fed cotton/stainless steel blended roving will slip with each other, thereby being stretched and thinned, and the stretched and thinned cotton/ The stainless steel blended roving is under the action of the twisting degree of the spinning frame, which makes the fibers in the mixed roving undergo internal and external transfer, so as to realize the mixing effect of cotton fibers and stainless steel staple fibers under the internal and external transfer, and cotton fibers and stainless steel short fibers are transferred inside and outside. During the process, mutual entanglement occurs, thereby obtaining a cotton/stainless steel blended electromagnetic shielding yarn with a certain strength.

2. the production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, is characterized in that, wherein cotton fiber adopts average spinning stability parameter 132, micronaire value 4.13, upper half average length 29.28mm, uniformity 82.4 %, short fiber rate 15.73%, breaking strength 30.53cN/dtex, 40816-65 US cotton fiber with water content of 7.29%, average spinning stability parameter 137, micronaire value 4.71, average length of the upper half 29.88mm, uniformity 83.42%, short 40892-62 US cotton fiber with a fiber content of 13.09%, a breaking strength of 30.7cN/dtex, and a moisture content of 8.29%.

3. The production method of cotton and stainless steel blended yarn for electromagnetic shielding according to claim 1, wherein the stainless steel short fiber is obtained by the stainless steel filament bundle through the drawing process on the same drawing frame.

4. The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, wherein the stainless steel filament bundle has an average fineness of 40 μm, a linear density of 9.5 dtex, a breaking strength of 98.85 cN, and an elongation at break of 29.54. %, the collusion strength is 157.85cN, and the collusion elongation is 0.69%.

5. The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, wherein the difference between the average length of the main body of the stainless steel short fibers in the stainless steel short fiber bundle and the average length of the cotton fibers is within ±5%.

6. The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, characterized in that, in the first step, the total mechanical drafting multiple of the pre-draw frame is 6-6.3.

7 . The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1 , wherein, in the first step, the drafting ratio of the piling machine is 2-2.5. 8 .

8 . The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1 , wherein in the first step, the total mechanical draft ratio of the comber is 100-115. 9 .

9. the production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, is characterized in that, in the second step, the average main body length of the stainless steel short fiber in the stainless steel short fiber bundle and the cotton fiber average length difference are in Within ±5%.

10. The production method of cotton and stainless steel blended electromagnetic shielding yarn according to claim 1, characterized in that, in the second step, in the second step, the total draft ratio of the left drafting system and the right drafting system is Between 5-6.