Differential feed effects of bottom and variable top feed mechanism. Influence of sewing conditions and fabric properties.:—Influence of Sewing Conditions and Fabric Properties—
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概要
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By using a bottom and variable top feed lock stitch sewing machine, an investigation has been made on the effect of the sewing conditions (differential feed conditions) and fabric properties on the differential feed. The results obtained were as follows:<BR>(1) A non-linear relationship was found between the shrinkage of fabrics (upper and lower fabrics) and (<I>l</I><SUB>b</SUB>-<I>l</I><SUB>a</SUB>) <I>l</I><SUB>b</SUB>/<I>l</I><SUB>a</SUB>. The slippage between upper and lower fabrics could be approximated quite well by the quadratic function of (<I>l</I><SUB>b</SUB>-<I>l</I><SUB>a</SUB>) <I>l</I><SUB>b</SUB>/<I>l</I><SUB>a</SUB>. Where <I>l</I><SUB>a</SUB> and <I>l</I><SUB>b</SUB> are the feed strokes ofthe bottom and top feeds respectively.<BR>(2) A correlation has also been found between the apparent length of fabrics slipped at the feed dogs (the bottom and top feed dogs) and (<I>l</I><SUB>b</SUB>-<I>l</I><SUB>a</SUB>) <I>l</I><SUB>b</SUB>/<I>l</I><SUB>a</SUB>.<BR>(3) 13 Kinds of fabrics were sewed under same differential feed conditions and the multiple regression analysis was done to clear what properties of fabrics influence on the slippage between upper and lower fabrics. From the results of the analysis, the model with 3 variables, i.e., fabric weight, coefficient of surface friction and flexural rigidity was judged to be the best one. Of all the variables, fabric properties mentioned above were very influential on the sewing slippage effect.
- 社団法人 日本繊維製品消費科学会の論文
社団法人 日本繊維製品消費科学会 | 論文
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