What are the technological innovations in the production of dyed yarns in recent years

With the development of non-cotton fiber production and varieties at home and abroad, its application in color spinning is gradually increasing, but the proportion of use is still low, and raw cotton still accounts for more than 80% of the color spinning yarn. As domestic cotton prices remain high and the quality of cotton after dyeing has dropped significantly, how to reduce the proportion of cotton used in dyed yarns and increase the use of non-cotton fibers is an important subject of technology innovation in dyed spinning. In recent years, people have improved their process technology on this issue, which is mainly manifested in the following aspects:
1. The use of advanced automatic mixing opener to replace manual small-volume mixing method. This technology is successfully developed by color spinning manufacturers. First, the various color cottons are opened in batches, and then the three-dimensional cotton mixing principle is used to uniformly mix and pack the raw materials of different colors and varieties in layers, and then arrange the bales on the bale grabbing machine. It can not only save labor for mixing cotton, but also mix cotton evenly according to the proportion and color requirements.
2. Using a simple blow-carding unit, the opened cotton layer is directly transported to the feeding box of the carding machine in a natural state, which can effectively reduce the carding burden, reduce fiber damage and improve the quality of sliver. The carding auto-leveling mechanism can control the weight difference of the output strip online to reduce the unevenness of the length of the fragment. It can be flexibly adjusted according to the batch size of dyed yarns. A cleaning production line is equipped with 4 to 8 carding machines.
3. Adopt high-efficiency combing machine. Since most of the colored spinning yarns are dyed with combed cotton webs and then blended, they are no longer restricted by small batches and multiple varieties, and the high-efficiency combing machine has a much higher fiber control power when combing than the A series "small combing. Hao, so the resulting combed cotton web has a low lint rate, and the output is 3 to 4 times that of A series combing machines. The combing table per 10,000 spindles can be reduced to 5 to 6 units, which reduces the plant area. , Reduce energy consumption, but also reduce the number of gears by more than 1 times.
4. The spinning process should gradually adopt a long machine with automatic doffing. Due to the particularity of the production of colored yarn, the ability of workers to stand is lower than that of natural colored yarn. At present, the manufacturing technology and use experience of the collective doffing machine are mature. Mélange spinning enterprises have been restrained by small batches, multiple varieties and high frequency of modification for a long time, and the promotion progress has been slow. The use of collective automatic doffing can reduce doffing workers by more than 50%, save 12 to 16 workers, shorten the doffing stop time, and improve production efficiency. The use of automatic doffing trolleys on conventional spinning frames can reduce labor intensity and reduce doffing labor by more than one time, and its transformation cost is low, and it is gradually being promoted.
In summary, through the promotion of new spinning technology and the application of new equipment, the quality of the DTY dope dyed has been improved and the number of hired workers has also been reduced. The efficiency is greatly improved, and the benefits will naturally be improved.Hangzhou Kaili Chemical Fiber Co., Ltd. is China functional yarn Manufacturers,visit https://www.klthread.com/