Ring spinning method and device of equi-linear density space dyed yarn

Abstract

The invention relates to ring spinning method and device of equi-linear density space dyed yarn. The method comprises the following steps of: respectively feeding a fiber strip group (A) with the linear density tex T(A) and a fiber strip group (B) with the linear density tex T(B) into a fixed rear roller and a loop rear roller on a rear roller shaft through yarn guiding rods and grids; and feeding the fiber strip group (A) and the fiber strip group (B) with constant feeding quantity sum into a rear drawing region in any period of time under the process requirement that the feeding speeds of the fiber strip group (A) and the fiber strip group (B) vary with stages by adopting a speed coupling uniform feeding control method. After the strip collection of a strip collector, fiber strips are fed into a middle roller in different drawing ratios, converged in a front drawing region of a spinning machine, drawn and output by a front roller and twisted into equi-linear density space dyed yarn.

Description

technical field [0001] The invention belongs to the field of spinning and forming processing, and relates to a method for forming colored yarns by ring spinning with equal linear density, and a device suitable for the yarn forming method of the invention. Background technique [0002] Segment colored yarn is a yarn in which the yarn color is intermittently distributed in the longitudinal direction of the yarn. At present, there are two methods for producing segmented colored yarns. One is to dye the yarn longitudinally and segmentally by the dyeing method, which has many procedures, high cost and poor color fastness; the other is to use the spinning method. Currently, there are three-roller method and four-roller method. The three-roller method uses the three-roller drafting mechanism of the spinning frame with simple modifications. The main core yarn is fed from the middle roller of the apron, and the auxiliary yarn is fed from the rear roller. The auxiliary yarn is contro...

AI Technical Summary

Problems solved by technology

At present, there are two methods for producing segmented colored yarns. One is to dye the yarn longitudinally and segmentally by the dyeing method, which has many procedures, high cost and poor color fastness; the other is to use the spinning method. Currently, there are three-roller method and four-roller method. The three-roller method uses the three-roller drafting mechanism of the spinning frame with simple modifications. The main core yarn is fed from the middle roller of the apron, and the auxiliary yarn is fed from the rear roller. The auxiliary yarn is controlled by electric or mechanical devices for intermittent feeding, and the main core yarn and auxiliary yarn are assembled at the apron roller to achieve the segment color effect. Obviously, the yarn formed by this method is slub-shaped; the four-roller method is adopted. Four rollers, the upper top rollers of the third and fourth rollers are held by the stepped top rollers to feed two rovings respectively, the main core yarn is fed from the fourth roller, and the auxiliary yarn is fed from the third roller, and the servo is controlled by the program controller The three and four rollers are separately controlled by the motors and driven by variable speeds in stages, and are assembled in the main drafting system composed of the first roller and the second roller to realize the effect of segmented colored yarn; One group of fibers is dominant, and the other group of fibers is used as auxiliary yarn to form segment color. Compared with the three-roller method, the four-roller method can adjust the speed of the three and four rollers, and the yarn evenness is relatively better, but the three- and four-roller method The distance between the holding point of the roving and the second apron roller is different, especially the distance between the second apron roller and the fourth roller is relatively large, which is not suitable for drafting and spinning of cotton-type fiber strips. At the same time, the three 4. The gripping point of the four rollers for the roving is not at the same point as the length of the roving. It cannot be synchronized and controlled at the same point, which will affect the evenness of the yarn and make the process adjustment complicated.

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