Influence of the combing process on the parameters of cotton yarns

In this article, we concentrate on the tests of combed ring and rotor yarns made from Greek and Egyptian long staple cottons. The rotor spinning machine BD 200S was fed with sliver of noncombed and combed fibres, from which 8 and 16% of noils were and combed yarns were also made on the ring spinning machine. Removing of short fibres in th..

Calculating the effectiveness of reducing the noise from devices for the tanglelacing of filament yarns (Russian)

Details are given of a method whereby the noise from a tanglelacing process involving the production of carpet yarns is considerably reduced. A layer of mastic initially reduces the noise level by 14-15 dB. A further layer of acoustic insulation reduces noise by another 8-10 dB, and polyurethane foam is then used to lower the noise level ..

Analysis of the manufacturing process of blended fine yarns with the content of flax fibres

The recent animation in the flax fibre market is mainly due to the possibility of processing flax in mixture with other fibres. Therefore, alongside of conventional flax spinning techniques, other spinning techniques are more and more widely adapted to spin flax fibres. A new technology is emerging, in which an essential role is played by..

ITMA review: Spinning preparation (German)

Spectacular spinning preparation equipment innovations were largely absent on the whole at ITMA '9 in Paris. Instead, continuous further development is recorded in terms of automation, ease of operation, product quality and production speeds. A survey of the developments in spinning preparation is provided below. The report on spinning ma..

Influence of defects on its tension during the spinning process on a ring spinning machine

In this study the influence of parameters characterising linear density distribution of yarn on its during the process of spinning on cotton ring spinning machines is examined. Using a mathematical model of twisting and winding system dynamics, changes in yarn tension depending on its linear density, value of variation coefficient, as wel..

Building a rule set for the fiber-to-yarn production process by means of soft computing techniques

An important aspect of the spinning process is the ability to predict the spinnability of a yarn and its resulting strength based on the fiber quality and machine settings. Currently available fiber-to-yarn models are limited to the so-called 'black box' approach, generating an output(spinnability) without containing physical, interpretab..

Cord winder

A cord winder for winding a cord comprises a first structure having a bottomed cylindrical shape and a second structure rotatably held in the first structure. The second structure includes a circular base portion, a center cylindrical stud raised on a center of the circular based portion and radially extending ribs formed on an outer surf..

Method and apparatus for winding a yarn into a package

A method and apparatus for winding a continuously advancing yarn, wherein the yarn is wound into a package that is formed on a tubular core, the yarn being traversed by a yarn guide within a traverse stroke. At the beginning of each traverse stroke, the yarn guide is accelerated within a reversal length to a guiding speed, and after trave..

Winding device and process for winding material webs

Winding device for winding material webs into winding rolls and process for winding material webs. The winding device includes a winding bed composed of at least two carrying rolls, includes a winding bed composed of at least two carrying rolls, including at least one driven roll, a roll support device having a core retainer and being pos..

Method for producing compacted yarn and device therefor

In order to recognize, indicate and, optionally, to automatically prevent malfunctions from occurring in compacting devices used in the production of compacted yarns on spinning machines, the hairiness of the yarn thus produced is monitored by means of sensors and when a predefined limiting value of the control device is exceeded with res..