Three-cylinder drafting system for retrofitting of e.g. ring spinning machine for distortion of sliver, has main drafting zone angled upward relative to preliminary draft zone such that axles of respective lower rollers lie in common plane

摘要

The system (1) has a compression zone (N) arranged downstream to a main drafting zone (H). Lower rollers (22, 32) are arranged upstream respective to an output lower roller (42). The main drafting zone is angled upward relative to a preliminary draft zone (V) at inclination angle (W) of 12.5 degree such that axles (221, 321, 421) of the lower rollers lie approximately in a common plane (E). The output lower roller exhibits larger diameter that is 30 percent larger than that of upstream lower rollers, where the upstream lower rollers exhibit approximately equal diameter.