Production method for spinning viscose compact sirospun yarns

Abstract

The invention discloses a production method for spinning viscose compact sirospun yarns. Viscose fibers are spun to form yarns through a compact sirospun production technology. The method comprises an opening and cleaning process, a cotton carding process, a roving spinning process and a fine yarn spinning process. In the opening and cleaning process, the speed of a kirschner beater is 480r / min. In the cotton carding process, the rotating speed of a cylinder of a carding machine is 330r / min, the rotating speed of a licker-in is 800r / min, the linear speed of a cover plate is 81mm / min, and the rotating speed of a doffer is 20r / min. In the roving spinning process, threads of resultant yarns spun by a roving frame are formed through a V-shape drafting manner by multiple fine yarns. In the fine yarn spinning process, the yarn between a middle roller jaw and a rear roller jaw forms surrounding arcs for a rear lower roller and a middle upper roller in a drafting rear zone of a spinning machine, so that the rear zone is in a curve drafting state. A wind suction pipe is arranged in a gathering and wind suction zone of the spinning machine; the wind suction pipe is provided with multiple wind suction double-grooves; the maximum distance between two wind suction grooves is 8-10mm; the upper groove width of each wind suction groove is 5-7mm; and the lower groove width of each wind suction groove is 3-4mm.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a production method for spinning viscose compact siro-spun yarns. Background technique [0002] Siro spinning, also known as parallel twist spinning, is called AB yarn in China, and it is officially named Siro spinning recently. The spinning mechanism of compact siro spinning is that two rovings are fed into the same drafting mechanism of the ring spinning machine in parallel through the double bell mouth at a certain distance, and are drafted simultaneously in a parallel state, and come out from the clamping point of the front rollers and enter the accumulation area . There are double grooves in each spinning position and the surface of the special-shaped tube in a negative pressure state is covered with a mesh ring, and the mesh ring is driven by the output roller friction. The two whiskers output by the front roller are absorbed by the negative pressure at the position corr...

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Problems solved by technology

[0003] However, in the current compact siro spinning, the twist of the two rovings is 20% lower than the twist of the ply yarn. In addition, there is still a twist-free triangle area in the forming process of a single roving, and the loss of fibers in the drafting system and the formation of a single There is a lot of loss before the root roving. In the cotton carding process, there are many fiber damages, high short-lint rate, poor straightening parallelism of combed sliver, poor yarn sliver compactness, high evenness CV% value, and low quality. Poor quality, belonging to relatively low-end products

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