From raw material to yarn, from yarn to fabric.

The main purpose of the roving process is to twist or twist the yarn with appropriate twist or false twist, so that the roving has a certain strength to withstand the winding and unwinding tension, and is conducive to the drafting process on the spinning frame. The roving is wound into a certain roll form, so as to facilitate transportation, storage, and meet the requirements of the spinning frame for feeding form, and better improve the efficiency of the spinning frame.

Main task

(1) Drafting: the sliver is drawn long and thin into roving.

(2) Twisting: add a certain twist to the roving to improve the strength of the roving.

(3) Winding: the twisted roving is wound on the bobbin.

06 Spinning

Spinning process is the last process in the spinning process, mainly by drawing, twisting and winding semi-product roving or sliver into spinning machine. The quality of spun yarn has a great influence on the quality of spun yarn.

The purpose of spinning yarn:

1. Lengthening the yarn to increase the yarn packing capacity and improve the production efficiency of subsequent processes.

2. Remove yarn defects and impurities to improve yarn quality and strength.

Main task

(1) Drafting: the roving is drawn to the required number of features.

(2) Twisting: add a certain twist to the drawn yarn to make it have a certain strength, elasticity and luster.

(3) Winding: winding into yarn, easy to transport and post-processing.

Woven weaving technology

The weaving process mainly includes: winding, warping, sizing, threading, weaving and finishing. The following is a detailed description of each step in the weaving process:

1 winding

Pipe yarn or Hank to be drawn from the spinning department

In the winding machine processing into a certain requirements of the bobbin

Main task

(1) Winding and forming: winding the yarn (line) into a large capacity, a model and a certain density of the bobbin;

(2) Impurity removal: clear some defects and impurities on the yarn to improve the quality of the yarn.

✪ Machinery involved in winding process:

Winder: It is to rewind the yarn from the twisting machine into a certain shape and large capacity bobbin, while eliminating impurities and defects on the yarn, so as to improve the productivity of the subsequent process.

2 warping

Will a certain number of warp

Wind parallel to the warp or weaving shaft according to the specified length and width

The warping process is mainly based on the provisions of the process design, the warp of a certain number and length is drawn from the winding bobbin to form a yarn sheet, so that the warp has a uniform tension and is tightly wound on the warping shaft parallel to each other to make preliminary preparations for the formation of the knitting shaft.

warping

process

(1) When warping, the warp must have appropriate tension, while maintaining the elasticity and tension of the warp as much as possible.

(2) In the warping process, the full warp and tension should be as uniform as possible.

(3) The warp arrangement and winding density on the warp shaft should be uniform (refers to the transverse and inner and outer layers of the warp shaft yarn), and the surface of the warp shaft should be congratulated without uneven phenomenon.

(4) The number of warping roots, length or color warp arrangement cycle must be combined with the provisions of weaving process design.

(5) Warping machine production efficiency should be high, less silk.

3 sizing

Sizing is applied to the warp to improve its weaves

Weavability: refers to the ability of the warp on the loom to withstand repeated friction, stretching, bending and other effects of the stop, heald, reed, etc., without a large number of hair or even breaking properties. Unstarched single yarn fibers do not hold each other tightly, the surface is too hairy, difficult to weave. After sizing, part of the slurry penetrates between the fibers and the other part adheres to the surface of the warp. The sizing based on the penetration of the slurry between the fibers is called immersion sizing, and the sizing based on the adhesion of the slurry to the surface of the warp is called coating sizing.

There are six main sizing methods: warp sizing, spinning sizing, finishing sizing, dyeing sizing, single sizing and Hank sizing.

4 Warp Pass

Make the warp further

In order of arrangement, arrangement width and density

To fix temporarily and locally

Threading refers to the process of threading the warp yarn on the knitting shaft into the warp stop, harness and reed according to the drawing on the fabric. There are two ways of threading, manual and mechanical. The warp threading machine is often used for plain and twill fabrics, which can Pierce 4 warp threads at the same time each time, and the output of the single machine is more than 50% higher than that of the manual.

5 Weaving

The weaving process mainly refers to the warp shaft passing through the shuttle guide weft yarn by the shuttle loom, interweaving into grey cloth according to the technological requirements, and winding into cloth rolls.

The textile process seems simple and repetitive, but in fact, every step of it has an important impact on the quality of the textile. Only by carefully mastering the spinning process and skillful operation can we prepare a good yarn of composite standard.