Limiting speed of false-twist texturing: a possible explanation of the post-surging mode

摘要

The speed of false-twist texturing is limited by tension surging, which has been explained as fipping between a good pre-surging mode and an unsatisfactory post-surging mode. Fundamental research on the mechanics of rotating rods has shown that buckling occurs above a critical speed for a rod under a given torque and tension. In false-twist texturing, it is postulated that this leads to formation of buckles in the feed→spindle zone, which pass through the system giving rise to the irregular behaviour of the post-surging mode.