ROLLER DRAFTING OF CONDENSED SLUBBINGS PART

Abstract

The model slivers with two different counts joined in series were tested by way of experiment as shown in Fig. 1_??_4. When the model slivers were twisted, the distribution of twist for thick and thin parts was measured, and then the tensile properties of the sliver were experimented.From these results for the model sliver, the tensile properties of condensed slubbings were analysed.The results obtained are as follows:In the model slivers, the distribution of twist turns are nearly proportional to the square of counts (Fig. 1, 2). By drafting above twisted model sliver, the thick parts are elongated larger than thin parts. Applying the optimal twist turns, the thin parts shows the minimum elongation, on the contrary the thick parts the maximum elongation (Fig. 3_??_6). On the condensed slubbings, the same results are obtained (Fig. 7_??_10).