Spinning profile
Spinning is a very ancient activity, since prehistoric times, human has known how to spin some shorter fibers into long yarns, and then weave them into cloth. It is the act of taking animal or plant fibers and twisting them to form a continuous and infinite yarn that can be used for weaving.
The twist of the yarn itself causes the fibers to hold together naturally and tightly, making it very favorable for weaving or knitting. The twist of the yarn is related to the diameter of the yarn and is measured by the number of revolutions per inch of yarn, and is expressed as low, medium or high. Usually the higher the twist, the more revolutions the yarn has, the better the strength of the yarn. Low-twist yarns are often used to make smooth, shiny or soft fabrics without light; fabrics with wrinkles or rough surfaces require a high twist yarn.
Spinning basic steps
Basic steps of spinning 1 .remove impurities
In the spinning process, the first need to remove impurities, that is, the initial processing of raw materials, also known as the preparation of raw materials for spinning. Different types of raw materials, the type and nature of impurities are different, the processing methods and processes are also different. The preliminary processing method of raw materials are mainly physical methods (such as cotton ginning), chemical methods (such as hemp degumming, silk refining) and a combination of physical and chemical methods (such as wool washing and de-grass charring).
Basic steps of spinning2 – loosening
Fiber loosening is the complete release of the transverse connections between fibers, but the damage to the fiber must be minimized. The collection of fibers is to make the loosening process of the fibers to re-establish the orderly arrangement of the longitudinal connection, this connection is continuous, and should make the distribution of fibers within the collection is uniform, and has a certain linear density and strength at the same time.
The fiber aggregation also needs to add a certain twist. Aggregate process is not completed at once, need to complete through carding, drafting and twisting and other multiple processing
Basic steps of spinning 3 – opening and loosening
Opening and loosening is the tearing of large fiber into small fiber. With the opening and loosening action, the connection between the fiber and the impurity is weakened, so that the impurity is removed, and the fiber is mixed with each other. The opening and loosening and impurity removal is not completed at once, need to complete through tearing, striking and splitting.
Basic steps of spinning 4 – carding
The carding action is that a large number of dense carding needles in the carding machine further loosen the small pieces and bundles of fibers into a single state. After carding, the transverse connection between fibers is basically removed, and the removal of impurities and mixing is more sufficient
Basic steps of spinning 5 – combing
The combing machine processing can remove the short fibers and small defects below a certain length, make the fibers more parallel and straight. Because of its neat length, less impurities, straight and parallel state, chemical fiber is generally not processed by combing machine.
Basic steps of spinning 6-drawing
Pull the combed fiber longer and thinner, gradually reaching a predetermined thickness, this process is called drawing. It lays the foundation for the regular head-to-tail relationship between the fibers. However, drawing will make the yarn unevenly, need to configure a reasonable drawing device and process parameters.
Basic steps of spinning 7 – twisting
Twisting is to twist the whisker around its own axis, so that the fibers parallel to the axial direction of the whisker are spiraled, then generating radial pressure to fix the longitudinal connection between the fibers.
Basic steps of spinning 8 – winding
The winding of a semi-finished product or finished product into a certain form for 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 products, and try to achieve continuous production among various processes, so as to reduce the quality problems caused by the winding process as much as possible.
In short, the spinning process generally includes raw material preparation, opening and loosening, carding, remove impurities, mixing, drawing, combination, twisting and winding, some of which are realized through repetition.
