Negative pressure air suction type siro spinning method and device for ring spun yarn

Abstract

The invention relates to a ring spun yarn negative pressure airflow suction type Siro-spinning method and device. On a ring spinning frame, two sets of fibers are output in parallel from a front roller jaw, enter an airflow channel hole in the output side of the front roller jaw and are bundled on the edge of an orifice of the airflow channel hole, and the two sets of fiber bundles are converged in the airflow channel hole and are combined and twisted to form yarn under the action of a twisting and winding mechanism; the size of the suction orifice of the airflow channel hole changes along with the two different states of spinning and end breaking, and in the end breaking state, the suction orifice becomes larger, so that fiber fringing are conveniently and smoothly sucked away by air flow in time; in the spinning state, the suction orifice becomes smaller. A fiber sucking and converging mechanism in the device is composed of a lower abdomen base, an upper left abdomen cover, an upper right abdomen cover, a left inner abdomen, a right inner abdomen, a left suction port yarn guider, a right suction port yarn guider, a yarn outlet yarn guider, a left carapace, a right carapace, a left carapace hinge pin, a right carapace hinge pin, a front yarn sliding plate, a rear yarn sliding plate, a support and a negative pressure air tube.

Description

technical field [0001] The invention belongs to the technical field of spinning, and relates to a negative-pressure airflow suction type siro spinning method and device for ring spinning. Background technique [0002] The long hairiness of the yarn is a harmful defect of the yarn. In order to eliminate the harmful long hairiness in the ring spinning process, people have proposed a variety of spinning methods for the accumulation and twisting of the fiber strands output by the front roller: compact spinning ——Before the fiber output roller enters the twisting zone, the fiber strands are collected on a porous surface by airflow, and they are gathered due to the suction of the negative pressure airflow, reducing the width of the fiber strands at the nip and reducing hairiness; Siro spinning—feed two rovings at a certain distance on the spinning frame, and after drafting, the two single yarns will be output by the front rollers. Due to the transfer of twist, the single yarns wil...

AI Technical Summary

Problems solved by technology

[0002] The long hairiness of the yarn is a harmful defect of the yarn. In order to eliminate the harmful long hairiness in the ring spinning process, people have proposed a variety of spinning methods for the accumulation and twisting of the fiber strands output by the front roller: compact spinning ——Before the fiber output roller enters the twisting zone, the fiber strands are collected on a porous surface by airflow, and they are gathered due to the suction of the negative pressure airflow, reducing the width of the fiber strands at the nip and reducing hairiness; Siro spinning—feed two rovings at a certain distance on the spinning frame, and after drafting, the two single yarns will be output by the front rollers. Due to the transfer of twist, the single yarns will have a small amount of Twist, after splicing, it is further twisted into a yarn similar to plying to achieve the effect of reducing hairiness; Sirofi spinning - a change on the basis of Siro spinning, where one filament is drawn with another on the ring spinning machine The final short fiber strands are twisted into yarns to reduce hairiness; Solo spinning - install a splitting roller with many grooves on the surface under the front roller, and use the grooves to divide the flat strands output under the front jaw These narrow fiber strips are rotated around their own twist centers due to twist transmission, with a small amount of twist, and then converged and twisted to form a cable yarn similar to twisted yarns; air-jet spinning - using jet air When performing false twisting on the fiber sliver after drafting, some free fibers at the head end of the fiber sliver are wrapped around the periphery of the fiber sliver; Siro compact spinning - based on compact spinning, with the characteristics of siro spinning, this method exists The unfavorable factors caused by the grid circle are defects in the non-airflow clustering control area between the gathering area and the nip of the front roller, and the twisted triangle area of ​​the two groups of fibers after exiting the nip, and the deviation of the distance between the two groups of fiber gathering points. Large, forming a larger twisting triangle with the twisting point, which is not conducive to controlling the defect of hairiness; negative pressure suction air spinning is a new idea of ​​a spinning method proposed by myself - using negative pressure airflow, the front roller The output fiber strands are sucked into the yarn guide channel to be gathered and twisted into yarns. Under the idea of ​​this method, it is found through experiments that when a single group of rovings are drafted and then sucked into spinning, there is twist transmission in the twisting triangle area of ​​the nip. Accumulation of fibers faster than air flow is not conducive to the reduction of long hairiness. Y-shaped double-pass suction nozzle is used, which is difficult to process and high in cost. The suction port and inner cavity are easy to block during spinning, and the spinning operation is difficult. Using multiple sets of air sources, spinning consumes a lot of air and increases energy consumption. How to improve and improve the suction-type compact spinning method and device, so that it has the stability of normal production, better hairiness control, and suction when the end is broken. The function of cotton, the easy-to-operate function of piecing, the requirement of easy processing during manufacturing, the requirement of low energy consumption during use, and the requirement of low cost during transformation are the keys to the success or failure of the new spinning technology of negative pressure suction spinning

Images