The Technique Of Modern Blowing-carding Unit And The Quality Controling Of Carding Sliver

This paper begins with the type of modern blowing -carding units and the allocation of their production processes. The function of the each single unit be studied ,and every working process be analyzed and comparised. .While it should point out that this mold of modern blowing-carding unit can be analysed into A..B. and C three categaries , and each one has its own good points and shortcomings. The productive short -flow bowing-carding unit will be the future tendancy, which is composed of four kinds of main machines, namely one mixer. One plucker.one cleaner, and one picking.Meanwhile, It also start from the use and the quality controlling on the productions in order to find an effective way to solve the problems in carding sliver in short fibre,the neps, trash, and weight unevenness of carding sliver. For there is no international standard .Through the using condition in the factories,it suggest to set up a quality controlling standard with the level of 25% USTER 97 Communique and then it put forward a detailed controlling standard on the carding yarn.The research shows the changing rule of short fibre and the neps during the spinning process. Studing the orthogonal experiment and process optimization , every unit after being optimized can obviously reduce the rate of short fibre. The orthogonal experiment also indicates that the speed of cylinder., the speed of licker-in, the output speed of the carding sliver and the neps and short fibre. To further optimize the above four factors , a regress equation can be moleculed by the neps and the first three factors, Which can provide a theory for analyzhg neps controlling.The weight unevenness of carding sliver is an important basis to measure the goodness and the badness of blowing-carding unit system. The experiment tells that the different processes of this system from different factories can give varied different impacts on the weight unevenness ofcarding sliver------the domestic one does more than imported one. the products produced in themorning are influenced more than those in the afternoon ; and check the different machines , the main problem in Jintan process is the unevenness in gas transiting between the card machine , and the Rieter is that inside machine . So, to overcome all those problems , We should get a omnibearing consideration from these four aspects : the regulation of fibre providing system , the optimization of productive process , the proper use of the Autolever , and the controlling of the filter and the air condition. .And only to base on these ,it put forward the detailed methods to control and overcome them.