Method for spinning section-color yarns and drafting mechanism for spinning

Abstract

The invention discloses a method for spinning section-color yarns and a drafting mechanism for spinning. At the rear drafting area of the drafting mechanism, leather rings are used for guiding and controlling yarns, namely a group of upper leather rings and a group of lower leather rings are used for controlling two groups of fiber fringes respectively, so for the rear drafting area of the drafting mechanism, the capacity of controlling free fibers is improved, when the drafting ratio at the rear area is changed greatly in sections, the stability of drafting of each sectional process is kept, and evenness and a sectional color effect of section-color resultant yarns are ensured. In the respect of product process design, the drafting ratio of the rear area is increased, and the transition length of the two groups of fibers between every two sections is shortened.

Description

technical field [0001] The invention belongs to the field of spinning and forming processing, and relates to a segment colored yarn spinning method and a spinning drafting mechanism suitable for the spinning method of the invention. Background technique [0002] Invention patent 201010636126.9 A method and device for forming colored yarn by ring spinning with equal linear density. In the invention patent, a coaxial double roller structure is proposed. The rear fixed roller and the rear looper roller installed by the looper correspond to each spindle position. The rear fixed roller and the rear looper roller are arranged in pairs, and the effective width of the rear looper roller and the rear fixed roller each account for half of the original One and two rear rollers have the same working outer diameter, corresponding to each pair of rear fixed rollers and rear looper rollers, and the rear upper top roller structure is also designed as two top rollers that are installed on th...

AI Technical Summary

Problems solved by technology

[0003] The drafting mechanism of the spinning device of this invention, its rear area structure is similar to the conventional three-roller double-apron drafting mechanism, and the conventional three-roller double-apron drafting mechanism, because the fibers in the rear drafting zone are not subjected to effective Control, the drafting ratio should not be too large in the process setting, generally controlled at about 1:1.05 to 1:1.3 times, too large drafting ratio will cause serious unevenness of fiber strands

[0004] The yarn formation principle of the coaxial double-roller section color spinning drafting machine is to use the segmental and different speed rotation of the rear double rollers to alternately feed the two groups of fiber strands at different speeds, so that the fixed roller and the rear looper roller after feeding The fiber strands in the rear drafting area obtain different drafting multiples in sections to form a segmental color effect. The evenness of the yarn and the effect of segmental coloring have a great relationship with the drafting in the rear area. The draft multiples of the two groups of fibers in the color spinning frame in the upper section of the spinning frame are alternately changed, and with the change of the ratio of the two groups of fibers, the draft multiples of the two groups of fibers in the rear area are very different, which is far beyond the normal spinning process control range, resulting in large draft unevenness, especially for products with short-term segmental process, it will also cause the segmental color effect to deteriorate

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