Application of Double Press Bar Top Pin in Back Zone of Spinning;

Draft Principle and Spinning Practice of Additional Press Bar Top Pin in Spinning Back Area;

Analyses in Spinning Effect of S-1 Nylon Top Pin;

In order to avoid the disadvantages of the conventional top cradle and to optimize the top cradle with excellent performance for spinning process,analysis is done to the main drafting types in use and the impact of the rear area of drafting section with press bar on quality of yarn.

Brief introduction is done to the main varities and properties of top cradles and air twisters as well as caution in application and measures to the problems that occured.

Based on the application of aluminuminserted nonsurface treatment cots,comprehension adjustment is done to the modes of surface treatments to the cots together with selection of nylon top cradles,and configuration of the dia.

Introduction is done to the structure of top cradles and the quality requirement of spinning operation on the top cradles.

Starting with the springs on the tension stand, top apron cradle,and the pressure of cradles on the formation of fuzzy yarns and slubs,the paper putsforth that it is wise to reinforce improving the working condition of machines,process elements and operation for better yarn quality.

By comparative analysis of the length variance of the apron nip of the aprons spinning under the different spacing block for different products and the spinning under the same spacing block for the same products,the spinning result is studied under the different spring pressure of the top apron cradles.

Description is done to the the relationship of tooth distance of rollers and the hi-efficient process and tex of yarn with affirmation of the tech-progress of the top arm,cot,the top apron cradle,the bottom apron cradle and the roller.