Double-S-curve soft drafting device

Abstract

The invention provides a double-S-curve soft drafting device. According to the double-S-curve soft drafting device, the rigid-flex friction force field of a lattice apron and double-S-curve control system mode is utilized to control movement of fiber, the additional friction force field distribution in a main drafting region is more reasonable, and based on the same raw cotton, the yarn forming quality level is obviously superior to that of traditional ring spinning and compact spinning. The double-S-curve soft drafting device comprises an upper support and a lower base. One end of the upper support is connected to one end of the lower base through a rotating shaft. The upper end face of the lower base is sequentially provided with a front roller, a middle roller and a rear roller. The advancing direction of the yarn is set to be the front. The positions, corresponding to the front roller, the middle roller and the rear roller, of the lower end face of the upper support are provided with a front leather roller, a middle leather roller and a rear leather roller. The double-S-curve soft drafting device is characterized in that a center shaft of the middle leather roller is sleeved with a nylon support, the rear portion of the nylon support is arranged on the center shaft of the middle leather roller in a sleeving mode, the front portion of the nylon support is provided an S-curve plate, and the lower end face of the cross section of the S-curve plate is an S-shaped curve surface.

Description

technical field [0001] The invention relates to the technical field of spinning machinery structures, in particular to a double S-curve soft drafting device. Background technique [0002] With the continuous development and innovation of textile technology, various new textile technologies have emerged, such as compact spinning, siro spinning, air-jet spinning, vortex spinning, etc. The existing drafting mechanism is a double-apron drafting mechanism, which is the current ring spindle A form of drafting commonly used in spinning frames. The core part of this drafting form is the elastic jaw with double rubber rings. The structure of the elastic jaw with double rubber rings is mainly that the upper rubber ring is set on the upper middle and upper rollers, and the lower pins are set on the middle and lower rollers. As well as the lower rubber ring supported by the rubber ring tension frame, the spring leaf is preset in the middle of the upper pin, and the spring leaf presses ...

AI Technical Summary

Problems solved by technology

[0004] (1) The speed difference between the upper and lower rubber rings will cause friction between the upper and lower rubber rings, resulting in static electricity, and the upper and lower rubber rings are poor conductors, static electricity is easy to gather on the rubber rings, and when the fiber bundle passes through, it will cause static electricity. It is charged with static electricity

These static electricity will cause many problems in the fiber drafting process: such as winding cots, aprons, rollers

[0005] (2) The speed difference between the upper and lower rubber rings can easily cause the movement speed of the upper and lower fibers in the sliver to be out of sync, which will rub the fiber bundles and affect the yarn evenness, hairiness, coarse details and other yarns index

[0006] (3) The speed difference between the upper and lower rubber rings may easily cause the instability of the drafting force during the drafting process, and the stable drafting force is the key to ensure normal drafting and yarn quality. Larger drafting force fluctuations It is difficult to meet the control requirements that the holding force is always greater than the drafting force in the normal drafting process, and the fiber guidance must be greater than the control force, which will deteriorate the yarn quality

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