# US 6,293,083 B1 · Spinning rotor for an open-end spinning frame

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- Number: US 6,293,083 B1
- Document ID: US6293083B1
- Status: Granted
- Kind: B1
- Application number: 09/676,826
- Filed: 2000-10-02
- Granted: 2001-09-25
- Earliest claimed: 1999-10-02
- Assignees: W. Schlafhorst AG & Co.
- Inventors: Harald Schneider
- Web page: https://patentgrep.com/patent/US6293083B1

## CPC

- C23C 28/027: {including at least one metal matrix material comprising a mixture of at least two metals or metal phases or metal matrix composites, e.g. metal matrix with embedded inorganic hard particles, CERMET, MMC.}
- C23C 2/04: characterised by the coating material
- C23C 28/00: Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C 28/023: {only coatings of metal elements only}
- C23C 28/04: only coatings of inorganic non-metallic material
- C23C 28/42: {characterized by the composition of the alternating layers}
- D01H 4/10: Rotors
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- D01H: SPINNING OR TWISTING (twisting oakum D01G35/00; crimping or curling of fibres, filaments, or yarns D02G1/00)

## Abstract

A spinning rotor for an open-end spinning frame has a coating of a non-ferrous metal with hard material granules embedded therein, which is applied to the surface of the base material (12), in particular a nickel layer with diamond granules, wherein the coating is comprised of at least two layers (7, 10) containing hard material granules, and an intermediate layer (9) free of hard material granules between the layers (7, 10) containing hard material granules. In case of a separation in places of the wear protection layer, such as can be caused by a scraper in the course of cleaning the spinning rotor, wear protection and spinning properties at the damaged places of the spinning rotor are preserved. As a result, it is possible to prevent a considerable shortening of the service life of the spinning rotor.

## Claims

### Claim 1

A spinning rotor for an open-end spinning frame, the rotor having surfaces for contacting textile fibers being spun or a resultantly spun yarn, the surfaces having a coating comprised of at least two layers of a non-ferrous metal with hard material granules embedded therein, and an intermediate layer of a non-ferrous metal essentially free of hard material granules between the layers containing hard material granules.

### Claim 2 (depends on 1)

The spinning rotor in accordance with claim 1, characterized in that the nonferrous metal is nickel.

### Claim 3 (depends on 2)

The spinning rotor in accordance with claim 2, characterized in that the layers are precipitated from a nickel dispersion bath in which the concentration of the hard material granules distributed therein is predetermined.

### Claim 4 (depends on 1)

The spinning rotor in accordance with claim 1, characterized in that the hard material granules are diamond granules.

### Claim 5 (depends on 1)

The spinning rotor in accordance with claim 1, characterized in that the layers containing hard material granules are at least about 10 μm thick.

### Claim 6 (depends on 1)

The spinning rotor in accordance with claim 1, characterized in that the intermediate layer essentially free of hard material granules is between about 2 μm and about 10 μm thick.

### Claim 7 (depends on 1)

The spinning rotor in accordance with claim 1, characterized in that the non-ferrous material is hardenable, and that the spinning rotor has been subjected to a heating process for increasing hardness.