Through the production trial,analysis is done to the application of the domestic spinning draft parts of V shape,pneumatic pressurizing,cots with low rigidity and hi-elasticity,new top and bottom aprons and mid-rollers on the drafting system of the spinning frame in relation to quality of resultant yarn.

Exploration is done to the relationship of cot structure,cot rigidity to evenness of the resultant yarn and yarn strength;relationship of cot rigidity to friction factor and linear width of nipper jaws;relationship of cot diameter and telescoping tolerance to quality of resultant yarn.

Details introduction is done to how to do process configuration and aborative management for upgrading quality of resultant yarn with big draft process.

An approach is done into the main factors on the spinning quality.

Through comparation spinning of the same kind,analysis is done to the effect of the cot WRC-963 with low hardness and hi-elasticity on the spinning process,as well as the important role on the spinning quality.

Discussed also hereunder is the relationship of the apron and the spinning quality.

Experiences of Enhance CJ 7.3 tex Yarn Quality;

The influence of back stationary flat system with suction device in a carding machine on the yarn quality;

Immature Fiber Content of Raw Cotton and Yarn Quality;