Patent ID: 6470534
Filing Date: 2002-10-29
Classification: D01H

Abstract:
A manufacturing method for woolen yarn of fine count with materials which are used to make woolen yarn on combined system of woolen card and cotton system comprising the steps of:preparing dyed or raw materials by means of conventional woolen system, feeding said materials to the woolen card, condensing said materials into a web from a doffer of the woolen card, forming coiled sliver in a can to transfer to a drawing frame of the cotton system, drawing the sliver on said drawing frame, adjusting the spacing between two nipping rail pairs to get fibers having a more uniform length and longer mean length, with which the fibers can be drafted on a roving frame and ring frame, adjusting the spacing between roller pairs of main draft zone of the drawing frame for a first passage, getting a required length gradually through a second passage, producing roving on the roving frame with the sliver produced from the second passage of said drawing, using recessed rollers of the second pair only when the longest length of fibers is longer than 60 mm, using recessed rollers of said second pair, spinning yarn with the roving frame, re-adjusting the distance between pairs of said first and second rollers, and using top rollers of said second pair only when the longest length of fibers is shorter than 60 mm.