ROLLER DRAFTING OF CONDENCED SLUBBINGS

The effects of twister tube wihich seems very important for roller drafting of condensed slubbing are investigate.A tester (Fig.1) has been designed to draft condensed slubbings by roller drafting type under various conditions of draft ration, ratio, ratchm false twister speed and thread angle θ (angle between slubbing and center of twister tube), and to measure the tension generated.The reduction in weight percentage of the cendensed slubbing takes place within the drafting field, mainly in the proximity of the front roller inside the tube, and slightly at the back roller. (Fig.4_??_Fig.7) These two parts have less number of turns of false twist than in the other part. (Fig.8_??_Fig.9)The efficiency of false twister tube is high at slow speed, and low at high speed. (Fig.10)