抄録
An investigation of yarn motion in yarn ducts with various cross-sectional shapes and its effects on the characteristics of interlaced yarn is reported. Seven interlacers, which are different in the cross-sectional shape of yarn duct, have the same cross-sectional area. Yarn motion in the yarn duct was observed with 16 sets of optical fibers and photo-sensors. The characteristics of the interlaced yarn were evaluated by both the number and the strength of tangles. The interlacer with a round yarn duct is capable of producing an interlaced yarn with larger number of tangles. This is because it can make yarn run frequently across an air jet issuing from an air jet nozzle. On the other hand, the interlacer with a cornered yarn duct makes yarn subjected to the strong action of a compressed air for a longer time, thus it results in higher strength of tangles.
