INFLUENCE OF CHANGES IN THE TECHNOLOGICAL CONDITIONS OF CARDING ON THE QUALITY INDICATORS OF THE TAPE AND YARN

Abstract

Carding in the spinning industry provides an individual, regular movement of fibers in the drafting device during drawing. During cotton processing, almost all non-garnetted fiber complexes, trash impurities and defects of fiber remaining after carding in the product pass into yarn. This leads to an increase and a breakage in spinning. Therefore, the efficiency of carding determines the quality of the yarn produced.

      This article considers optimization of carding machines’ technological parameters, that is, choice of flats’ movement speed for production of higher quality carding bands, as well as yarns. Among many machine parameter variables such as main drum rotation speed, taker-in rotation speed, feed speed and discharge speed, flats’ movement speed also plays an important role. In our example, we worked on the flats’ movement speed influence on the product quality, while all other parameters remained unchanged. Five different flat speeds were used to produce bands and yarns.

      As a result of the study, improved properties of evenness and strength of the yarns are observed at the flats’ speed of 360 mm/min, but with a significant increase in the percentage of wastes.