In the entire project cotton, cotton linters, and negative main impurities in the carding step two. During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit.
Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery. According to the spinning process, carding is an important process. The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process).
Noil not only contains a large amount of impurities and dust of short fibers, but also has many long fibers that can be spun. Carding two-step down cotton accounts for more than 85% of the total cotton spinning, closing the project, therefore, the amount of cotton used to card the cost of closing the product has a direct impact. Practice has proved that exceeding Tsumugi does not necessarily improve the quality of products, we hope that each machine has high cleaning efficiency and reduced cotton impurity rate.
Taking off more and more techniques in cleaning, but sometimes because of too many blows, the quality of the product declines. Therefore, the noil cotton used for carding is directly related to the quality control of the product. Noil control in blowing and carding, also known as noil distribution in blowing and carding, is to rationally distribute the impurity removal load of the two processes of blowing and carding, give full play to the impurity removal efficiency of each machine, improve product quality and save cotton.
There are several opinions on the cleaning of cotton and the control of dripping cotton. One social opinion is that the quality management of yarn is high, and the amount of cotton must be more to make the noil in the two processes of blowing and carding sufficient. As for the impurity rate in the noil If it is too high, it can be downgraded and reused after effective treatment. In this way, not only can the quality of products and services of the enterprise be improved, but also the noils can be spun into sub-brand yarns, and the total output of cotton yarns will not be reduced. Another way of disagreeing is that the yarn quality management requirements are high, relatively speaking, the amount of cotton used may be slightly higher, but if noil is increased, although the total output of the cotton yarn industry will not decrease after recycling, however, genuine yarn Or medium and fine yarn production is reduced, so it is not economical.
It is believed that cleaning cotton can not be developed blindly, but we should control it. In the distribution of waste, from cleaning to carding, large impurities are dropped first, then small impurities, less first, then more. A cautious attitude. In addition, it is necessary to actively and effectively improve the impurity removal efficiency of various machines in the body, especially in some cotton-picking enterprises. Pay attention to students to increase the impurity rate of cotton, so as to improve the quality of teaching and spin more genuine yarn or medium and fine yarn.
Experimental studies have shown that the latter teaching method not only improves the product with less neps and impurities, but also reduces the amount of cotton used. The purpose of the test is to try to control the rate of cotton cleaning and seed breakage on the basis of ensuring the noil impurity rate of Yikou, reduce the number of new flowers, and appropriately adjust and relax the noil rate of the rear belly of the carding machine, so as to reduce the neps. Impurities and cotton conservation requirements.