Automatic yarn repair - uses controlled blown air intensity to detach broken yarn end with adjusted settings to improve the success rate

摘要

To give an automatic broken yarn repair at a spinner, esp. a ring spinner, the broken yarn end is detached from the winding cops (3) by a stream of blown air (21) with an intensity which is controlled according to the deg. of success in loosening the yarn end from the conical wound section (22) of the cop (3). Pref. the blown air stream (21) control is set by the yarn repair procedure for individual cops (3). In the event of a failure to detach the loose broken yarn end, the air stream intensity is increased on the second attempt, and then returned to the initial intensity on a third attempt. The success rate of the blowing actions is formed from a number of yarn repair procedures and, if it fails to achieve a nominal success rate, then the air blowing intensity is increased for subsequent yarn repairs. ADVANTAGE - The system matches the action of the blown air stream to actual conditions.