Fly frame drafting device adapting to large draft ratios

Abstract

The invention discloses a fly frame drafting device adapting to large draft ratios. The device is of a four-roller four-short-apron drafting mode and is provided with a vice drafting area, a main drafting area and a distribution area, wherein the main drafting area and the vice drafting area are respectively provided with a double-short-apron drafting device formed by an upper apron, a lower apron, an upper pin and a lower pin. According to the fly frame drafting device, due to the fact that the vice drafting area is provided with double short aprons, two apron drafting areas exist in common, a mode that a traditional drafting device is provided with two rollers simple drafting areas and a double-short-apron drafting area is broken through, large draft ratio production of a fly frame is achieved, and a roving procedure can be smoothly achieved when spinning of cotton yarns with the density equal to or over 150 s is carried out. The fly frame drafting device can adapt to the large draft ratios ranging from 12 to 20 on the premise that spinning quality is guaranteed.

Description

Technical field: [0001] The invention relates to a drafting device of a textile machine, in particular to a drafting device of a roving frame adapted to a large drafting multiple. Background technique: [0002] One of the tasks of the roving frame is drafting, which is to stretch the cooked sliver into roving strips. In order to ensure normal drafting, the original drafting device is mostly four-roller double-short apron drafting. This kind of drafting device is composed of three parts: the rear drafting area, the main drafting area and the finishing area. The rear drafting area and the finishing area are simple roller drafting, and the main drafting area is apron drafting. The main drafting area is provided with an apron control element consisting of upper and lower aprons, upper and lower pins, and spacers. On the premise of ensuring the quality of the roving, the ranges of the draft ratios of the three parts are 1.06-1.53, 3.83-7.78, and 1.02, respectively. The total dr...

AI Technical Summary

Problems solved by technology

In spinning linear density at 150 s And above cotton yarn, because the cross-sectional area of ​​cotton yarn is too small, it is limited to the draft ratio and production quality requirements of the spinning frame in the next process. The draft ratio of the roving frame needs to be more than 16 times, and the original roving draft device cannot meet the requirements.

Images