Abstract
The mathematical model of weft knitting process is formulated by the assumptions deduced from the knowledges obtained by analyzing the knitting tension described in the previous reports. It is confirmed that this model can be used to analyse the yarn motion in the knitting zone and the variation of yarn tension during the knitting.The following results are obtained by this model : (1) The upper the needles ascend from the step line of the stich cam, the oftener the robbing back occurs. The lower the yarn tension is, the nearer to the feeding side the robbing back occurs. (2) The shorter the length of the cam step is, the lower the knitting tension and the more flat the shape of the tension distribution is. (3) To lower the knitting tension and to decrease the tension variation, the cam track must be so designed that the step of a stitch cam is short in length and the motion of needles which left from the stepis controlled positively.
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