Cold-gas spray gun

Details Cold-gas spray gun Cold-gas spray gun

C - Chemistry, Metallurgy

23

C

C23C 24/04 (2006.01)

Patent

CA 2645846

The cold-gas spray gun comprises a high-pressure gas heater, which has a pressure vessel (1) through which a gas flows and has a heating element (3) arranged in the pressure vessel (1), and also comprises a mixing chamber (6, 14), in which particles can be fed to the gas by a particle feed (11). Arranged downstream of this in the direction of flow of the gas is a Laval nozzle (8), which comprises a converging portion (7, 12, 15), a nozzle neck (9) and a diverging portion (10). The high-pressure gas heater and/or the mixing chamber (6, 14) are at least partially internally insulated at the contact surfaces with the gas.

L'invention concerne un pistolet de projection à gaz froid qui comprend un réchauffeur de gaz sous haute pression qui présente un récipient sous pression (1) traversé par le gaz et un élément chauffant (3) disposé dans le récipient sous pression (1), ainsi qu'une chambre de mélange (6, 14) dans laquelle des particules peuvent être apportées au gaz par une amenée (11) de particules. Un ajutage de la vanne (8) est disposé en aval dans la direction d'écoulement du gaz et est constitué d'une partie convergente (7, 12, 15), un col d'ajutage (9) et d'une partie divergente (10). Le réchauffeur de gaz sous haute pression et/ou la chambre de mélange (6, 14) sont au moins en partie isolées du côté intérieur sur leur surface de contact avec le gaz.

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