4results about How to "Improve evenness" patented technology

This invention relates to a blending process for hemp fiber and sorona fiber, belonging to the technical field of blending and processing of natural fibers and bio-based elastic fibers. The blending process for hemp fiber and sorona fiber of this invention includes the following steps: raw material selection → pre-spinning process → post-spinning process → packaging. This invention solves the problems of poor spinnability, high breakage rate, and stiffness and wrinkling in pure wet-spun hemp through specific proportions and wet spinning processes, achieving high-count, stable, and high-quality production. This significantly improves spinnability, enhances yarn quality, and greatly improves hand feel and comfort, achieving high elasticity and comfort to meet user needs.

The invention belongs to the technical field of spinning, and relates to a drafting device for improving the dry uniformity of vortex spinning lines. The vortex spinning front drafting area comprises a front roller, a front pressing roller, a middle roller, a middle pressing roller, an upper pin, two symmetrical upper rubber rings, a lower pin, two symmetrical lower rubber rings, a small pressing roller, a transmission assembly and a lifting mechanism. The small compression roller is parallel to the middle compression roller, penetrates through the two upper rubber rings at the same time and makes contact with the upper surfaces of the working edges of the two upper rubber rings, the distance between the contact point and the jaw of the front roller is D1, the length of the spun fiber raw material is L, and the absolute value of the difference value between D1 and L does not exceed 3 mm; the transmission assembly is used for driving the small compression roller to operate along with the middle roller in the same direction and at the same speed so as to apply acting force F1 parallel to the operation advancing direction of the working edges of the upper rubber rings to the two upper rubber rings; and the lifting mechanism is used for adjusting the height of the small compression roller so as to apply a vertically downward acting force FN to the two upper rubber rings. The drafting device is simple in structure, and the air vortex spinning line evenness can be effectively improved.

The application relates to a spinning method of a two-component blended yarn, which adopts a double-feeding double-separation comb rotor spinning technology, and the two-component blended yarn is composed of first-component fiber segments and second-component fiber segments arranged alternately; first, the ratio S of the length L1 of the first-component fiber segments to the length L2 of the second-component fiber segments in the two-component blended yarn is set, S is not equal to 1, and the types or colors of the first component and the second component are different; then, the included angle lambda between the vertical line C1 of the first-component corresponding fiber outlet and the rotary axis of the rotor and the vertical line C2 of the second-component corresponding fiber outlet and the rotary axis of the rotor is calculated; finally, the feeding mass ratio of the first component to the second component is controlled to be 1:1, the spinning is carried out according to the calculated included angle lambda, and the two-component blended yarn is obtained. The application can realize accurate regulation and control of the interval distance proportion of the two-component fiber segments on the yarn surface, and the obtained yarn strength and yarn evenness are good.

The invention relates to the technical field of cloth pulp machines, and provides a cloth pulp machine for controllable formation of multiple layers of fibers and a control method of the cloth pulp machine. Comparing the layer pressure Pi with a target pressure Ptarget; and controlling the pulp distributor according to the comparison result. The pulp distribution machine is controlled through the layer pressure Pi, layered independent pulp supply can be achieved, controllability of composition and thickness of each layer of fibers is guaranteed, fiber flocculation and local deposition are remarkably reduced, the uniformity of paper sheets is improved, coupling of interlayer adjustment is avoided, and sensitivity and reliability of system adjustment are guaranteed.