Yarn tension monitoring and setting system

Abstract

Yarn processing system (S) for simultaneously processing a plurality of yarns (Y1 to Y4) in processing machine like a twisting machine, a texturising machine, a dyeing machine, comprises a yarn tensioning assembly and has for each yarn entering the processing machine (M) at least an individual controlled tensioner (6), and an individual tensiometer (10), at least the controlled tensioner (6) and the tensiometer (10) being integrated into a closed yam tension feedback regulation loop (11) for regulating and maintaining a set yam tension, at least the tensiometers (10) being connected in parallel to at least one superimposed common tension monitoring and setting system (19) for centrally setting and monitoring the yarn tension.

Description

technical field [0001] The invention relates to a yarn handling system. Background technique [0002] EP0644957A, NL1022975A, US-A-4778118 and JP-A10310329 relate to yarn handling systems using a common delivery device and a common yarn tensioning device for a plurality of yarns running simultaneously. The individual processors are twisters or crimpers (air-jet entanglers) or spinners. JP-A-10310329 discloses, for example, an individual yarn detector and a common signal evaluation device for signaling a yarn breakage. The common transfer device and the yarn tensioning device must guarantee a completely uniform yarn tension between the simultaneously processed yarns. The yarn tension cannot be adjusted individually for each yarn. Inevitably, however, variations in yarn tension that occur between yarns obviously have undesired effects on the final product quality. Furthermore, the individual yarn detectors required require relatively high additional costs. Adjustment of ...

AI Technical Summary

Problems solved by technology

Yarn tension does not remain sufficiently uniform over a period of time

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