Impact of carding parameters and draw frame speed on fibre axial distribution in ring - spun yarn

摘要

Fibre axial distribution of cotton ring - spun yarn using three process variables, viz. card draft, coiler diameter of card and delivery speed of draw frame, has been studied. It is observed that the percentage of trailing, leading and total hooks and their extents on ring-spun yarn decrease with the increase in draw frame delivery speed and coiler diameter at carding machine. The above parameters also decrease as the card draft increases. Since the fibre extent and spinning - in coefficient are related to the efficacy of hook removal, these parameters improve as the delivery speed and coiler diameter increase and deteriorate as the card draft increases. It is also observed that the fibre overlap index decreases as the delivery speed and coiler diameter increase; the parameters however increase with the increase in card draft. It is interesting to note that the spinning-in coefficient and fibre overlap index do not show positive relationship.