Study on Interlaced Yarn:Part 6: Yarn Motion in Interlacer

概要

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In order to clarify yarn motions in an interlacer, we took photographs of yarns during process with a high speed cine-camera, and analyzed time series data of yarn positions. As a result, the positions where opening parts are processed are limited to the vicinity of the air jet nozzle, and tangling parts are processed on both sides of the opening parts. The yarn motion at the section of the air jet nozzle consists of rotation and traversing the jet axis: A yarn that rotates inside the left semicircle of the yarn duct in the same direction as the air flow for a certain constant time traverses the jet axis to the right semicircle, and continues rotation in the opposite direction. The yarn again traverses the jet axis to the left semicircle after a constant time. The yarn locus is a modified form of letter 8. In the vicinity of the ends of the yarn duct, the yarn motion depends upon process conditions. The yarn rotates inside the left or the right semicircle, or inside the whole yarn duct independently of the air flow direction. Outside the yarn duct, the yam moves in a wider region as the air pressure, the yarn speed or the feed ratio increases.
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