What is the processing principle of wool?

 

Miscellaneous

 

Spinning is a science that studies the processing of textile staple fibers into yarns. The yarns are usually made by a number of short fibers of varying lengths, and are made of long continuous filaments. Made up. In the spinning process, it is first necessary to remove the impurities, that is, the preliminary processing of the raw materials, which is also called the preparation of the spinning raw materials. The types of raw materials are different, the types and properties of impurities are different, and the processing methods and techniques are different. The primary processing methods for raw materials are physical methods (such as ginning), chemical methods (such as degumming of hemp, refining of silk), and physical and chemical methods (such as wool washing and de-charging).

 

Loose

 

The disorganized and horizontally closely related fibers are processed into a longitudinal order, and the smooth yarn with certain requirements needs to change the bulk fibers into a single fiber state, thereby releasing the horizontal connection of the fiber raw materials and establishing a firm end-to-end connection. Vertical contact. The former is called the release of fibers, and the latter is called the collection of fibers. The release of the fiber is a complete relief of the horizontal relationship between the fiber and the fiber. However, fiber damage must be minimized. The collection of fibers is such that the loosened fibers are re-established in an aligned longitudinal relationship that is continuous and that the fibers within the assembly are uniformly distributed while having a certain linear density and strength. Fiber aggregates also need to be added with a certain degree of twist. The assembly process is not completed once, and it can be completed after many processes such as combing, drawing, and twisting.

 

Open pine

 

Opening is to tear large pieces of fiber 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 relationship between the fibers and the impurities is weakened, so that the impurities are removed and the fibers are mixed. The opening action and the removal of impurities are not completed at one time, but are gradually realized by rational configuration of tearing, striking and segmentation.

 

Combing

 

The combing effect is to further loosen the small pieces and small bundles of fibers into a single state by a large number of dense combs on the carding machine, thereby further improving the release of the fibers. After the carding, the lateral relationship between the fibers is basically removed, and the impurity removal and mixing effects are more sufficient. But there are a lot of fibers in the shape of a curve. And there are hooks, there is still a certain horizontal relationship between each fiber. The earliest spinning machine.

Combing

The combing action of the combing machine is to use the comb to perform more detailed combing on the ends of the fiber respectively. The combing machine can eliminate short fibers and fine clams below a certain length, which makes the fibers more parallel and straight. Chemical fibers are generally processed without combing because of their neat length, low impurities, and straight parallel state.

draft

The combed strips are drawn to length and gradually reach the predetermined thickness. This process is called drafting. It lays the foundation for the firm establishment of a regular end-to-end connection between fibers. However, the drafting will result in uneven length of the sliver, and therefore, it is necessary to arrange a reasonable drafting device and process parameters.

 

Coronation

 

Twisting is to twist the strand around its own axis so that the fibers parallel to the axial direction of the strand are helical, creating radial pressure to secure the longitudinal relationship between the fibers.

 

Winding

 

The semi-finished or finished product is wound into a form suitable for storage, transportation, and processing of the next process, which is called winding. The winding process should be carried out continuously without affecting the output and quality of the product. Efforts should be made to achieve continuous production between processes and to minimize the quality problems caused by the winding process. In short, the spinning process generally includes the preparation of raw materials, opening, combing, removing impurities, mixing, drawing, combining, twisting and winding, and some effects are achieved after repeated iterations.