A four-roller double-zone draft spinning device and spinning method

Abstract

The invention discloses a four-roller dual-region drafting spinning device and method. The device comprises a four-roller traction system with a rear lower roller and rear upper rubber roller, a middle rear lower roller and middle rear upper rubber roller, a middle front lower roller and middle front upper rubber roller and a front lower roller and front upper rubber roller. The front lower rolleris driven by a first motor and in transmission with the rear lower roller through a gear set. The middle rear roller and the middle front lower roller are driven by a second motor through a belt. When the rear roller, the middle rear roller, the middle front roller and the front upper rubber roller press down at the same time, a first traction region is formed between the rear roller and the middle rear lower roller, a second traction region is formed between the middle front roller and the front lower roller, and a transition finishing region is formed between the middle rear roller and themiddle front lower roller; when the rear roller, the middle rear roller and the front upper rubber roller press down at the same time, a first traction region is formed between the rear roller and themiddle rear lower roller, and a second traction region is formed between the middle rear roller and the front lower roller. When the rear roller, the middle front roller and the front upper rubber roller press down at the same time, a first traction region is formed between the rear roller and the middle front lower roller, and a second traction region is formed between the middle front roller and the front lower roller.

Description

technical field [0001] The invention relates to the new technical field of ring spinning, in particular to a four-roller double-zone draft spinning device and a spinning method. Background technique [0002] The drafting system is an important part of the spinning frame, and its performance directly affects the yarn quality. At present, the common spinning frame adopts the three-roller drafting form, including the common three-roller double-apron structure and the three-roller four-apron structure that can achieve 80-100 times larger draft. The ordinary three-roller double-apron structure is divided into two drafting areas: the front drafting area and the rear drafting area, and the rear area only uses simple rollers for drafting, so the friction force circle in the middle is relatively weak, and the draft ratio is generally less than 1.4 times, which is unfavorable to increase the total draft ratio of the spinning frame, so the total draft ratio is between 20 and 50. In o...

AI Technical Summary

Problems solved by technology

In order to solve the problem of low drafting capacity in the rear area, it was disclosed in the Chinese patents "Drawing Device for High Count Worsted Frame" (No. 96107383) and "Four-Apron Drafting Mechanism for Spinning Frame" (No. 012439010) A three-roller three-apron and three-roller four-apron drafting mechanism is developed, which better solves the problem of weak drafting capacity in the rear area of ​​the three-roller drafting mechanism, so that the total drafting ratio can be increased to 100

However, because it adopts a three-roller form, that is, there are only two continuous draft zones, the increase in draft ratio is limited

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