Ring spinning process and top equipment manufacturers
Ring spinning process:
Blowing—carding—drawing—roving—spun yarn—winding
1. Blowing
1. The tasks of the blowroom (also known as cotton blowing) machine:
1). Opening: 0.1mg (about 16 fibers) cotton bundles, using angle Nails, saw teeth, blades, steel needles, etc.;
2), impurity removal: impurity removal rate 40-70%, dust rod;
3), mixing: to make even;
4), into rolls or Cotton clump: The cotton rolls or cotton clumps that meet the quantitative and uniform requirements are sent to the next carding machine.
2. Classification of cotton opening and cleaning machinery
(divided according to main functions)
1) Cotton feeding machinery: automatic cotton picking machine, cotton box cotton feeder. The cotton picking machine has opening and mixing functions.
2), cotton blending machinery: cotton box, brad machine parts. Mix repeatedly and feed the cotton evenly.
3) Cotton opening machinery: various beaters, blowing, loosening cotton blocks, and preliminary impurity removal (double axial flow cotton opener, porcupine cotton opener).
4) Cotton cleaning machinery: meticulously loosens and removes impurities, and rolls or sends the cotton clumps to the carding machine by airflow.
3. Internationally renowned cotton opening and cleaning equipment manufacturer:
1), Truetzschler, Germany: BDT019 reciprocating cotton picking machine → MFC dual-axial flow cotton opening machine → MCM multi-silo cotton mixing machine → CXL4 cleaning machine Cotton machine → SCFO foreign fiber detection and separation device.
2) Swiss station: A11 reciprocating cotton picking machine → B11 single axial flow cotton opener → B70 multi-bin cotton blending machine → B60 cotton cleaning machine.
3) Crosrol (UK), Marzoli (Italy), and Hollingsworth (HollingsWorth) in the United States
The products of these manufacturers each have their own characteristics and tasks in the cotton cleaning process
2. Carding
1. The tasks of the carding machine:
1) Carding: carding small cotton bundles and small cotton pieces into a single fiber state;
2) Impurity removal: removing small cotton pieces Small impurities and fibrous seed chips;
3) Uniform mixing: Mix raw cotton with different components between fibers and make the output uniform;
4) Strips: Made into certain specifications and weights The required sliver is circled in the sliver can
2. Carding machine model:
1), DK903 high-yield carding machine produced by Trutzschler, Germany;
2), Swiss Station Carding machine C51 produced by Da;
3), Zhengzhou JWF1206 carding machine produced by Shanxi Jingwei
4), A186F carding machine produced by Qingdao Fabric Machinery Co., Ltd.
3. Combing
1. The tasks of the combing process:
1). Dissolve the short fibers below a certain length in the raw sliver to improve the uniformity of the fibers, so as to reduce the unevenness of the yarn and improve the Yarn strength.
2). Remove impurities and neps between fibers to improve the integrity of the yarn.
3) To further straighten, parallelize and separate the fibers in the raw sliver to facilitate the strength, evenness and finish of the spinning yarn.
4), make combed cotton sliver with uniform sliver. Quality control of combed sliver
2. Quality control of combed sliver:
1) Reduce neps and impurities.
2) Reduce sliver unevenness and short staple rate.
3) Reasonably grasp the noil rate according to different fiber varieties.
4) Check and grasp the positioning of the cylinder.
5) Ensure the normal operation of carding components.
6) Make sure the brush cleans the cylinder.
7), grasp the airflow impurity removal and dust collection effect.
3. Better combing machine manufacturer: Swiss Zonda E66/E76 combing machine
4. Drawing
1. The main tasks of the drawing process are:
1) Merging: combine 6-8 cotton slivers and feed them into the drawing frame to make one sliver. The thick and thin sections of the cotton sliver have the opportunity to overlap each other, improving the unevenness of the long sliver segments. The weight unevenness of raw strips is about 4.0%, and the weight unevenness of cooked strips should be reduced to less than 1% after merging.
2) Drafting: The sliver is immediately stretched and thinned to the original level. At the same time, the fiber condition is improved through drafting, so that the hooked and curled fibers can be further straightened and paralleled, and the small cotton bundles can be further divided into single fibers. . By changing the draft ratio, the ration of the cooked sliver can be effectively controlled to ensure that the weight deviation and weight unevenness of the spun yarn meet national standards.
3) Mixing: Use the method of repeated merging to further achieve the mixing of single fibers to ensure that the mixed cotton content of the slivers is uniform and the yarn quality is stabilized. Due to the different coloring properties of various fibers, slivers made of different fibers are combined on the draw frame to fully mix the various fibers. This ensures that the number of fibers in the cross-section of the yarn is more evenly mixed., an effective means to prevent color differences after coloring, especially when chemical fiber and cotton blended chemical fiber fabrics are particularly important.
4) Sliver forming: Place the sliver produced by the draw frame in regular circles in the sliver can for easy transportation and storage for use in the next process
2. Better draw frame manufacturer : Switzerland’s RSB-D401 autoleveller draw frame, Germany’s Truetzschler TD-02 draw frame, TD 8 new generation Truetzschler draw frame.
5. Roving
1. The tasks of the roving process:
1). Drafting: lengthening and thinning the cotton sliver into roving
2). Twisting: adding a certain twist to the spinning yarn , improve the strength of spinning yarn to avoid accidental elongation during winding and unwinding, and do not plan for spinning draft.
3) Winding: The twisted roving is wound on the bobbin, and the bobbin of a certain shape and size is specially made for storage, transportation and adaptability to feeding on the spinning machine.
2. Roving frame manufacturer: Swiss Zanda roving frame F15 / F 35
6. Spinning yarn
1. The tasks of the spinning process:
The spinning process is the last process in spinning production. It is to spin the roving into a spun yarn with a certain number of characteristics, in line with quality standards or customer requirements, for twisting , woven or knitted fabrics, etc., the spinning process mainly completes the following tasks:
1) Drafting: the fed roving or sliver is evenly stretched and thinned to the special number required by the spun yarn.
2) Twisting: Add appropriate twist to the drafted sliver, so that the finished yarn has certain physical and mechanical properties such as strength, elasticity, finish and feel.
3) Winding and forming: The spun yarn is wound on the bobbin according to certain forming requirements to facilitate transportation, storage and subsequent processing.
2. Better spinning machine manufacturers: Swiss Zonda, Japan Toyota
7. Winding
1. The tasks of the winding process:
1) Make the raw yarn (or filament) into a bobbin with a capacity trap, and provide it to warping, weft rolling, knitted fabrics, and shuttleless looms Processes such as weft supply or bleaching and dyeing. In terms of bobbin capacity, large package bobbins can only accommodate about 2500m of 29.2tex (20-inch) special cotton yarn. If the bobbin yarn is directly used in processes such as warping or weft supply on the loom, the downtime will be too long due to frequent bobbin changes, which does not meet the technological requirements and is not conducive to improving production efficiency. The package capacity of the package has been greatly increased. Generally, the winding length of a package of medium and special yarns can reach about 100,000 meters.
2), remove certain defects and acrobatics on the spinning yarn, and improve the quality of the spinning yarn. The raw yarn shipped from the spinning mill generally has many appearance defects. When passing through the yarn clearing device on the winding machine, the fluff, dust, weak yarns, thick knots and other impurity defects on it can be removed. In this way, it can It improves the appearance quality of fabrics and increases their average strength by eliminating weak links in spinning yarns, thereby reducing end breakage in subsequent processes of spinning yarns.
Among them, the better automatic winders are Murata from Japan, Savio from Italy, and Schlafhorst from Germany.
AAA4353466DG
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