Opening roller for rotor spinning machines

Abstract

An opening cylinder for rotor spinning machines comprises a plurality of teeth which are arranged in a line which extends in a continuous spiral-shaped manner on the periphery thereof. The advancing tooth flanks of the tooth form, respectively, an acute angle k of at least 1 DEG and at the most 2. 5 DEG with respect to the rotational direction of the opening cylinder during rotation, thus improving the function of the opening cylinder and the quality of the thread.

Description

technical field [0001] The invention relates to an opening roller for a rotor spinning machine according to the preamble of claim 1 and a wire sawtooth bar according to the preamble of claim 7 ( ). [0002] Such opening rollers are used to separate the fed fiber strip into individual fibers. The individual fibers are then conveyed from the opening rollers via fiber guide channels to the spinning rotors of the rotor spinning machine and spun into yarn. It is important for the function of the opening rollers rotating at high speeds that the entrainment of the individual fibers by the opening rollers is achieved in sufficient quantities, and that the centrifugal force and the negative pressure present at the end of the fiber guide channel , The detachment of individual fibers from the opening roller is not hindered. Background technique [0003] DE 41 24 714 A1 describes that drawing of the fibers takes place as long as the fibers of the fed fiber web are still held by feed...

AI Technical Summary

Problems solved by technology

[0005] As described in DE 41 24 714 A1 and DE 195 09 743 A1, the roughness of the tooth flanks of the tooth, especially high roughness, can lead to unfavorable fiber damage and to an increased risk of contamination through fiber wear

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