Design and Numerical Simulation of Low-Fiber Hollow Spindle in Air-Jet Vortex Spinning

Based on the mechanical system of free-end fibers and the analysis of pulling free-end fibers out of the spun yarn during spinning,a low-fiber hollow spindle is designed and the air distribution of fluent field is simulated numerically. The negative pressure effect is much bigger at the top of low-fiber hollow spindle than that in Murata No.861,which is more conducive for single fiber to get into the channel of hollow spindle. The tangential velocity in 0-3 mm at the top of hollow spindle increases and the fluctuation of radial velocity is much stronger,which enhance the wrapping effect. In the addition,the distribution of axial velocity remains the same.

PRELIMINARY STUDY ON OPEN END JET SPINNING

A new concept of spinning-open-end jet-spinning, which combines the advantages of the false twist jet spinning and open end winning, was proposed, and a device was designed to practice this concept. The property of thc open-end jet spun yarn was measured and discussed in comparison with that of some other spun yarns.

Determination of Correction Values of Operating Reliability of Assembly Components of the Assembly—Front Spinner Spinning Box (R1 Rieter) on the Basis of Operating Data

The optimal safety model includes the values of the operation of the components with the allowed risk, and it is clearly seen that the belt of absolutely safe operation of the analyzed circuit is located between the values of the displayed dependence curves Mξ(t)BP = f(t). AND also, analyses have been carried out to ensure the flawless operation of the OE machine and the consistency of product quality.