What is the production principle of knitting wool yarn

Update: 12-10-2020
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Spinning is wool mixed yarn a science that studies the […]

Spinning is wool mixed yarn a science that studies the processing of short textile fibers into yarns. Yarns are generally made of many short fibers of varying lengths through splicing methods, as well as long continuous monofilament twists. Combined.In the spinning process, it is first necessary to remove imperfections, that is, preliminary processing of raw materials, also known as spinning raw materials preparation. The types of raw materials are different, the types and properties of impurities are different, and the processing methods and processes are also different. The preliminary processing methods of raw materials mainly include physical methods such as cotton ginning, chemical methods such as degumming of hemp, scouring of spun silk, and methods combining physical and chemical methods such as washing and de-grazing of wool. Process the disordered, horizontally closely connected fibers into a longitudinal order, and have a certain requirement of smooth yarn. It is necessary to turn the bulk fiber into a single fiber state, release the horizontal connection of the fiber raw materials, and establish a strong end-to-end connection.

 

22% wool mixed yarn(26Nm/2)

 

Vertical connection. The former is called fiber loosening, and the latter is called fiber assembly.Fiber loosening is to completely remove the horizontal connection between fiber and fiber. However, fiber damage must be minimized. The fiber assembly is to re-establish an orderly longitudinal connection of the loosened fibers. This connection is continuous, and the fiber distribution in the assembly should be uniform, and at the same time have a certain linear density and strength.Fiber assembly requires a certain degree of twist. The assembling process is not completed at one time, it can be completed only after multiple processing such as carding, drafting and twisting. Opening is to tear large pieces of fibers into small pieces and small fiber bundles. Broadly speaking, the degumming of hemp is also a kind of opening.

 

As the opening action progresses, the connection force between the fibers and the impurities is weakened, so that the impurities are removed and the fibers are mixed. The opening effect and the removal of impurities are not completed at one time, but gradually achieved through reasonable configuration of tearing, striking, and segmentation. The carding function is to further loosen the small pieces and small bundles of fibers into a single state by a large number of dense needles on the carding machine, thereby further improving the loosening of the fibers. After carding, the transverse connection between the fibers is basically eliminated, and the effect of impurity removal and mixing is more sufficient. However, a large number of fibers are curved. And there are hooks, and there is still a certain horizontal connection between each fiber. The combing function of the earliest spinning machine combing machine is to use the comb to carry out more detailed combing in the holding state of the two ends of the fiber.

 

Combing machine processing can eliminate short fibers and small imperfections below a certain length, and promote the fibers to be more parallel and straight. Chemical fibers are generally not processed by a comber because of their neat length, less impurities, and good straightness and parallelism. The semi-finished or finished product is wound into a certain form to facilitate storage, transportation and processing in the next process. This process is called winding. The winding process should be carried out continuously on the basis of not affecting the output and quality of the product, and efforts should be made to realize the continuous production between the various procedures to minimize the quality problems caused by the winding process. In short, the spinning process generally includes the functions of raw material preparation, opening, carding, impurity removal, mixing, drafting, merging, twisting, and winding. Some functions are realized through repeated iterations.

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