Oversized drafting device on spinning frame

Abstract

The invention relates to an oversized drafting device on a spinning frame. The device is characterized in that the lower part of a cradle is provided with a rear iron roll, a middle iron roll and a front leather roll; the upper part of a roller stand is provided with a rear roller, a middle roller and a front roller; a rear upper pin and a rear lower pin are arranged in front of the rear iron roll and the rear roller; the rear iron roll and the rear upper pin are wounded with a rear upper leather collar; the rear roller and the rear lower pin are wound with a rear lower leather collar; a leather collar jaw is respectively formed on the rear upper pin and the rear lower pin by the rear upper leather collar and the rear lower leather collar; a middle upper pin and a middle lower pin are arranged in front of the middle iron roll and the middle roll; the middle iron roll and the middle upper pin are wound with a middle upper leather collar; the middle roller and the middle lower pin are wound with the middle lower leather collar; and a leather collar jaw is respectively formed on the middle upper pin and the middle lower pin by the middle upper leather collar and the middle lower leather collar. According to the oversized drafting device, the yarn forming evenness is improved, and the maximum drafting times achieve 100 times when the super-fine-term cotton yarn is spun.

Description

technical field [0001] The invention relates to a drafting device, in particular to a super large drafting device on a spinning frame, belonging to the field of textile equipment. Background technique [0002] The drafting device of the cotton spinning frame is a device that evenly stretches the fed roving to the required fineness of the yarn. The existing drafting device is composed of a set of roller drafting and a set of apron drafting. ,Such as figure 1 As shown, the roving first enters the roller drafting and then enters the apron drafting. Due to the limited ability of the roller drafting to control the fibers, the total drafting ratio can only reach about 50 times; when spinning ultra-high count cotton yarn, such as 200~ When the cotton yarn is 300 English count, the roving must be spun very finely. The uniformity of the roving is obviously deteriorated, and fine details are easy to appear during unwinding, resulting in poor spun yarn uniformity and many broken ends,...

AI Technical Summary

Problems solved by technology

[0002] The drafting device of the cotton spinning frame is a device that evenly stretches the fed roving to the required fineness of the yarn. The existing drafting device is composed of a set of roller drafting and a set of apron drafting. ,like figure 1 As shown, the roving first enters the roller drafting and then enters the apron drafting. Due to the limited ability of the roller drafting to control the fibers, the total drafting ratio can only reach about 50 times; when spinning ultra-high count cotton yarn, such as 200~ For 300-count cotton yarn, the roving must be spun very finely, and the evenness of the roving is obviously deteriorated, and fine details are easy to appear during unwinding, resulting in poor spun yarn evenness, many broken ends and unable to spin normally

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