Model Experiment on Interlaced Yarn

Abstract

We have developed an apparatus with which a yarn can be intermittently exposed to an air jet in the yarn axial direction. An attempt is made by using this apparatus in place of conventional interlacers to produce interlaced yarns with various numbers of tangles under conditions that air pressure, yarn speed, feed ratio and nozzle height are constant. Intermittent blowings of air jets onto a yarn are enough to produce interlaced yarns, and conventional interlacers are not always necessary. With increasing the frequency of blowings, the number of tangles increases linearly in the range of the lower frequency of blowings, stays constant in the middle range and decreases linearly in the higher range. The maximum of the number of tangles is 46/m in this experiment. Up to this value, the number of tangles can be controlled by the frequency of blowings independently of the air pressure, the yarn speed, the feed ratio and the nozzle height. The production probability of many tangling parts takes 150% in this experiment for small values of the frequency of blowings. As the frequency of blowings increases, the production probability of many tangling parts decreases rapidly because of the effects of both the mutual interference and the period of air jet blowings.