Short-Staple Spinning--Surprises Confined to Detail.

At ITMA 1995, machinery manufacturers in the short staple spinning sector presented modifications of existing processes rather than new processes or machines. A brief review of innovations in blowroom machinery (including bale opening systems and cotton cleaning machines), carding machines, drawing machines, combing machines, roving machi..

Worsted, Semi-Worsted and Woollen Machinery.

At ITMA 1995, developments in woolen processing systems emphasized economic viability and market acceptance. Upgrading, rather than technical innovation, was evident in better machine cleaning, drive, and lubrication techniques; the optimization of the dimensions of machine elements; the development of machines for niche products; better ..

First ITMA Impressions in the spinning Sector.

A review of ITMA 1995 discusses the latest technical developments in the spinning sector. In general, all machinery from the fiber opening to the yarn production stages has been improved by the addition of electronic control systems. The performance of carding machines has improved significantly. Graf, for example, offered a new card clot..

New perpectives to assure quality in the integrated spinning mill

The use of Loepfe MillMaster and YarnMaster systems to ensure high quality production in integrated spinning mills is described. The MillMaster is a PC-based data acquisition system for the winding department which also comunicates with the Yarn Master defect clearing system. The combined system provides data on rare and frequent yarn def..

Spinning apparatus of a centrifugal spinning machine

A centrifugal spinning machine for making a yarn from a fibrous product has several spinning units in a vertical arrangement, which each comprise: a drawing mechanism for forming a roving from the fibrous product; a scroll tube for twisting the roving into a yarn; a yarn conductor below the scroll tube for directing the yarn coming from t..

Tandem spinning

After a previous report that successfully demonstrated the viability of tandem spinning, continued research has resulted in the development of a totally integrated tandem spinning system, which produces a unique, all-staple, core-wrap, composite yarn continuously and without interruption. The resulting tandem spun yarn is torque-balanced,..

The effect of a slub on the stability of the ring spinning balloon

In a recent paper, a computational model for investigating the effect of a heavy slub passing through a ring-spinning balloon was described. In this paper, the model is extended to allow for the effect of a control ring at the mid-balloon height, and an extensive investigation of the solution space of the model is presented. It is shown t..

Influence of spinning operations on the evolution of yarn hairiness

Yarn hairiness, as an important feature of yarn surface geometry, has a significant influence on the course of post-spinning operations, as well as on the aesthetic properties of fabrics. In this work a review of the influence of some operations in the spinning process on the evolution of yarn hairiness is given, together with some possib..

Twist in the spinning of a composite yarn

This study describes the effects of yarn twist on the structure, properties, and production of a T/C composite yarn. The results show that yarn twist in the special structure of a composite yarn is very critical, and good properties of 19.7 tex T/C composite yarn such as high skein strength, good abrasion resistance, and low irregularity ..

Quenching system for melt spinning plants

The development of a new high-quality spinning system by Ems-Inventa AG of Domat/Ems, Switzerland, is described. The central quenching system devised for the process and the associated spin pack are characterized. The central quenching system has a capacity of 2000 g/min and is highly economical. It features microfibre spinning, good fibr..