# US 9,040,116 B2 · Method and device for coating components

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- Number: US 9,040,116 B2
- Document ID: US9040116B2
- Status: Granted
- Kind: B2
- Application number: 13/509,578
- Filed: 2010-11-11
- Published: 2012-09-06
- Granted: 2015-05-26
- Earliest claimed: 2009-11-12
- Assignees: MTU Aero Engines AG
- Applicants: Andreas Jakimov; Stefan Schneiderbanger; Manuel Hertter
- Inventors: Andreas Jakimov; Stefan Schneiderbanger; Manuel Hertter
- Web page: https://patentgrep.com/patent/US9040116B2

## CPC

- C23C 24/04: Impact or kinetic deposition of particles
- B05B 7/205: {the material to be sprayed being originally a particulate material}
- B05B 15/55: using cleaning fluids
- C04B 41/009: {characterised by the material treated}
- 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)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

A method for spraying a coating and a cold gas spray nozzle is disclosed. The method includes spraying a coating by the cold gas spray nozzle. A rinsing gas is fed to the cold gas spray nozzle during an interruption of the spraying or at an end of the spraying. Deposits in the cold gas spray nozzle are cooled and detached by the rinsing gas.

## Claims

### Claim 1

A method for spraying a coating, comprising the steps of:
spraying a coating by a cold gas spray nozzle;
feeding liquid CO2 into and through the cold gas spray nozzle during an interruption of the spraying or at an end of the spraying; and
cooling and detaching deposits from an inner surface of the cold gas spray nozzle by the liquid CO2.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising the step of feeding the liquid CO2 into and through the cold gas spray nozzle between successive spraying processes.

### Claim 3 (depends on 1)

The method according to claim 1, further comprising the step of controlling the feeding of the liquid CO2 to the cold gas spray nozzle based on a volume and/or a temperature of the liquid CO2.

### Claim 4 (depends on 1)

The method according to claim 1, further comprising the step of adjusting the feeding of the liquid CO2 to the cold gas spray nozzle as a function of a status of the spraying and/or an operating duration of the spraying and/or a type of coating material.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the step of feeding the liquid CO2 to the cold gas spray nozzle includes the steps of feeding a large volume of the liquid CO2 to the cold gas spray nozzle at a beginning of the feeding followed by increasing a pressure of the liquid CO2 at an ending of the feeding.

### Claim 6 (depends on 1)

The method according to claim 1, further comprising the step of laterally diverting the liquid CO2 and detached deposits exiting from the cold gas spray nozzle by a mechanical diverting device positioned in front of an exit of the cold gas spray nozzle.

### Claim 7 (depends on 1)

The method according to claim 1, further comprising the step of extracting the liquid CO2 from the cold gas spray nozzle by suction.