Method for producing a rotor cup for an open-end spinning rotor along with a rotor cup for an open-end spinning rotor

Patent metadata

Field	Value
Publication number	US-10753013-B2
Application number	US-201816005833-A
Country	US
Kind code	B2
Filing date	Jun 12, 2018
Priority date	Jun 13, 2017
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A method for producing a rotor cup for an open-end spinning rotor includes forming separating structures on a front-side rim of the rotor cup for breaking up and preparing a yarn end for piecing. The separating structures are formed by a non-mechanical manufacturing method without contact between the front-side rim and a mechanical forming tool. A rotor cup formed in accordance with the method is also provided.

First claim

The invention claimed is:

1. A rotor cup for an open-end spinning rotor, comprising:
an inner rotor wall;
an outer rotor wall;
a rotor bottom;
a front-side rim opposite the rotor bottom; and
a plurality of separating structures in the front-side rim for breaking up and preparing a yarn end for piecing, the separating structures comprising a micro-profile surface.

2. The rotor cup according to claim 1 , wherein the micro-profile surface comprises a profile depth (PT) of less than 50 microns.

3. The rotor cup according to claim 1 , wherein the micro-profile surface comprises an irregular pattern.

4. The rotor cup according to claim 1 , wherein the separating structures are spaced apart from each other along the front-side rim.

5. The rotor cup according to claim 4 , wherein the separating structures are arranged over an entire circumference of the front-side rim.

6. A rotor cup for an open-end spinning rotor, comprising:
an inner rotor wall;
an outer rotor wall;
a rotor bottom;
a front-side rim opposite the rotor bottom;
a plurality of separating structures in the front-side rim for breaking up and preparing a yarn end for piecing, the separating structures comprising a micro-profile surface; and
wherein the separating structures comprise a width (B) of less than 0.5 mm.

7. A rotor cup for an open-end spinning rotor, comprising:
an inner rotor wall;
an outer rotor wall;
a rotor bottom;
a front-side rim opposite the rotor bottom;
a plurality of separating structures in the front-side rim for breaking up and preparing a yarn end for piecing, the separating structures comprising a micro-profile surface; and
comprising a spacing (A) between 0.2 mm and 1.5 mm between the separating structures.

8. The rotor cup according to claim 1 , wherein the separating structures comprise a depth (T) or height (H) of less than 100 microns.

9. The rotor cup according to claim 1 , wherein the separating structures extend into one or both of the inner rotor wall and the outer rotor wall.

10. The rotor cup according to claim 1 , further comprising a coating on the rotor cup, the separating structures formed in the coating.

11. The rotor cup according to claim 1 , wherein the separating structures comprise a plurality of depressions in the front-side rim spaced apart from each other.

Assignees

• Rieter Ag Maschf

Inventors

• Kuebler Markus
• Loos Bernd
• Frank Andreas

Classifications

• D01H4/10 Primary

  Rotors · CPC title

• D01H4/50

  for rotor spinning · CPC title

• D01H7/78 Primary

  Constructions of cups, e.g. spinning boxes · CPC title

• D01H2700/01

  Preparatory spinning machines · CPC title