Abstract
In this research, we discussed the effect of nip gauge on the irregularity of the sliver. Initial experiments were done on an intersecting gill. Various nip gauges were adjusted on the gill-box and the irregularity of the produced slivers were measured. Generally, in the most of the current reports, it was thought that the irregularity of the sliver increases as the nip gauge increases. The results of our experiments on the gill box do not show a significant change in irregularity of wool sliver when the nip gauge was changed. To investigate more detail about this result, we prepared an experimental apparatus with higher variable nip gauge than that of the gill-box. The withdrawing test was done for various distance between the first faller and withdrawer jaws. As a result, we found that the effect of nip gauge on the irregularity of the sliver depends on the fiber length distribution. In case of wool sliver, because of the fiber length distribution, the effect of nip gauge on the sliver irregularity is not significant in a conventional gill-box with its limited nip gauge range.
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