Yarn resistant twisting head

Abstract

The invention relates to a yarn navel of an air spinning device, which has a coaxial structure arranged in an inlet funnel, and grooves arranged at a distance, which are positioned at the downstream of the coaxial structure. According to the invention, the coaxially arranged structures ( 30 ) are formed by circular protrusions or grooves ( 32 ) of different diameters.

Description

technical field [0001] The invention relates to a yarn navel for an air spinning device. Background technique [0002] Yarn navels for open-end spinning devices have long been known in the art and are known in various embodiments. [0003] A common problem in open-end spinning devices is that the true twist of the yarn introduced by the rotation of the spinning cup is unevenly incorporated into the yarn being formed. [0004] That is to say, the true twist of the yarn is firmly deposited on the yarn section that is then located between the yarn navel and the yarn draw-off mechanism of the rotor spinning device. [0005] In contrast to this, the true yarn twist is often introduced only particularly incompletely into the yarn section preceding the yarn navel. [0006] Since a particularly low yarn twist in the yarn section located between the rotor groove and the yarn navel has a particularly bad influence on the spinning stability of the rotor spinning device, it has previo...

AI Technical Summary

Problems solved by technology

[0033] That is to say, in order to produce the helical structure on the inlet region of the yarn navel, a relatively complex and overall particularly expensive tool is required

[0034] A further disadvantage in these yarn navels is that the helical structure flows out towards the edge of the yarn navel, which results in the yarn formation areas in the grooves of the spinning The distance between the helical structures of the true twist of the thread is constantly changing.

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