Quality assurance in the production of spun yarns

As spinning techniques become ever more complex and production rates increase, classic yarn testing and fault elimination methods are no longer adequate and must be supplemented by other methods. Quality competence analysis can help here. This begins with an examination of the concept for a yarn with regard to its suitability in principle..

Air flow round the rotating pirn and power loss. III. Effects of the cover shapes on power loss to rotate the pirn

For part II see abstract 90W/04778. In part III the effects of cover shape on power loss are to produce air flow impact with the surface of the ratating pirn. The space in which the turning pirn stirs the air around itself is reduced by setting covers over and around it - the power loss can be reduced by a high cover, but if the cover hei..

Short wool on the cotton system

The use of wool on the cotton system of spinning has been studied. The objectives of the study were to determine the practical spinning specifications for the production of yarns made from 80％ cotton and 20％ wool, and to compare the processibility of short Texas wool with the more expensive combed/cut wool. The project used both types o..

Influence of machine variables on two-strand yarn spinning geometry

Strand convergence angle and strand twist above the convergence point constitute the primary yarn formation condition in two-strand (Sirospun) yarn spinning. In order to assess the strand convergence angle and strand twist during spinning, dual-coloured multifilament yarns were fed directly from the front rollers of a ring frame run in a ..

CIM in the spinning mill - utopia or reality?

In the highly-industrialized countries of Europe, the introduction of computer-intergrated manufacturing into the spinning mill could prove to be an extremely effective means in the future of competing with the low-wage countries. This article raises the question of whether CIM is already available for application in the spinning mill. Fu..

Optimization in a spinning mill

A method for improving production in a cotton spinning mill producing ring yarns is described.

Heberlein: specialist in air texturing

Heberlein's HemaJet EO-52 offers new possibilities in the coarser titre area for air-jet textured yarns. The jet is ideal for household textiles, car seat covers and specialist industrial yarns.

Studies of dust in cotton sliver

An Elitex BD200M rotor spinning machine (without a dust removal system) has been used as a means of measuring the amount of dust in finisher sliver supplied to rotor machines, so indicating the efficiency of opening room equipment and cards. Data collected over a period of ten years from industrially-prepared sliver tested in this way has..

New Orbit ring traveller system

The new ring traveller system jointly developed by Swiss firms Rieter and Bracker and Prosino of Italy and derived from the SU-Ring system is patticularly suitable for running speeds of over 40m/sec. The new Orbit system is described.

Roller drafting

Developments in roller drafting are reviewed with regard to both practical and theoretical aspects, the former being divided further to consider the machinery used and its products separately. There are 78 references.