Movement of Fiber in a Flat Card

概要

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The rate of the movement of fibers from a cylinder to a doffer and the quantity of fibers on a cylinder have been investigated with the use of rayon staples carded by a flat card in order to get a proper distribution of fibers on the cylinder and thus increase production on a metallic card. Results : (1) P is constant irrespective of the fiber density on a cylinder. (2) P is 6-7 on ordinary carding cloth, and 9 % on metallic carding cloth. (3) In order to reduce P, it is effective to reduce the working angle of the duffer metallic wire. (4) The quantity of fibers on a cylinder is about 90 gains with ordinary carding cloth, about 68 gains with metallic carding cloth, in the normal running state when carding sliver 280 grains/6 yds. Both values are less than the quantity of sinking fibers between the carding cloth of a cylinder and the flat. Therefore, by increasing P on a metallic card, it is possible to reduce the quantity of fibers on a cylinder and improve the efficiency of carding action.
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