Device for creating and conveying a gas-powder mixture

• US 8,973,523 B2
• Filed: 11/19/2009
• Issued: 03/10/2015
• Est. Priority Date: 11/27/2008
• Status: Active Grant

• Current Assignee: Oerlikon Metco AG (OC Oerlikon Corporation AG)
• Original Assignee: Oerlikon Metco AG (OC Oerlikon Corporation AG)
• Inventors: Kokott, Walter, Hll, Helmut Paul, Richter, Peter Jr., Richter, Peter Sr.
• Primary Examiner(s): Yuan, Dah-Wei D
• Assistant Examiner(s): Thomas, Binu
• Application Number:
  US13/131,501
• Publication Number:
  US 20110247555A1
• Time in Patent Office: 1,937 Days
• Field of Search: 118/308, 118/312, 118/317, 406/144, 406/14, 406/19, 406/146, 406/108, 406/122
• US Class Current: 118/308
• CPC Class Codes: B05B 7/1404 Arrangements for supplying particulate material
• CPC Class Codes: B05B 7/1486 for spraying particulate material in dry state
• CPC Class Codes: B05B 7/16 incorporating means for heating or cooling the material to be sprayed spraying by means of explosions B05B7/0006
• CPC Class Codes: B05C 19/00 Apparatus specially adapted for applying particulate materials to surfaces
• CPC Class Codes: B05C 19/008 Accessories or implements for use in connection with applying particulate materials to surfaces; not provided elsewhere in B05C19/00
• CPC Class Codes: B05C 19/02 using fluidised-bed techniques fluidised-bed technique in general B01J8/24
• CPC Class Codes: B05C 19/06 Storage, supply or control of the application of particulate material; Recovery of excess particulate material
• CPC Class Codes: B65G 53/14 the gas flow inducing feed of the materials by suction effect
• CPC Class Codes: C23C 24/04 Impact or kinetic deposition of particles

Abstract

The invention relates to a device for creating and conveying a gas-powder mixture having a powder receiving space (3) that is connected to a vacuum creation device via a vacuum line (19) that discharges to the upper region of said powder receiving space. A reduced pressure in comparison to a mixing chamber (7) can be created within the powder receiving space (3), and thus a gas flow directed against the powder flow direction within a powder supply channel (6).

Claims

1. A device for creating and conveying a gas-powder mixture at an increased pressure, comprising:

a powder container comprising a powder holding chamber structured and arranged for holding a powder and a vacuum line opening into a region of the powder holding chamber;

a mixing chamber structured and arranged for mixing gas and powder;

a gas supply line structured and arranged to supply gas at an increased pressure into the mixing chamber;

at least one powder supply duct arranged between the powder holding chamber and the mixing chamber to carry the powder from the powder holding chamber into the mixing chamber; and

a mixture outlet line structured and arranged for removing a gas-powder mixture from the mixing chamber,

wherein the vacuum line is directly connected to the gas supply line so that the gas flowing in the gas supply line generates a reduced pressure within the powder holding chamber relative to a pressure in the mixing chamber to generate within the powder supply duct a gas flow directed counter to a powder flow direction.

2. The device according to claim 1, wherein the powder holding chamber and the mixing chamber are located in a multi-part housing comprising a powder container housing and a mixing chamber housing.

3. The device according to claim 2, wherein the mixing chamber housing comprises a plurality of parts including a mixing chamber base part and a mixing chamber cover part.

4. The device according to claim 1, wherein a metering device structured and arranged for a metered release of the gas-powder mixture from the mixing chamber is arranged one of immediately before or within the mixture outlet line.

5. The device according to claim 4, wherein the metering device is arranged in the mixing chamber cover part.

6. The device according to claim 1, wherein the gas-powder mixture is created and is structured to be conveyed through the device for coating processes.

7. The device according to claim 1, being structured and arranged to perform a cold-gas spraying coating process.