High quality yarn is friction spun at high speed without fibre defects

摘要

A process for spinning yarn entails feeding sliver for breaking up into streams of individual fibres by disseminating devices (1) and feeding them from opposite sides onto friction surfaces of two or more revolving parallel elements under negative pressure which form spinning wedges (20, 21). The fibres are fed into a yarn forming zone (18) between the elements for spinning and drawing out the zone as a yarn parallel to the element axes. The fibre streams (24), in the region of the spinning wedges, are fed directly at an acute angle (27) w.r.t. the drawn yarn (17) direction (25) onto the formation zone via guide channels in the disseminating devices to form a single yarn in the line where the inter-element distance is min. (a). Finished yarn speed (vG) is at least that (vF) of the stream fibres (10). Also claimed is appts. for process implementation, the friction elements revolving in the same direction at distance, a, greater than the finished yarn dia., there being two or more disseminating devices and a device (37) for withdrawing the yarn at vG and disseminating rollers (3) for feeding the fibres at vF.