Patent ID: 7654223

Claim:
A cold spray apparatus comprising: a gas controller for controlling a gas supply amount of main gas and residual gas; a gas heater for heating the main gas supplied under the control of the gas controller; a powder feeder for receiving the residual gas under the control of the gas controller and supplying a coating powder together with the residual gas; a powder preheating device for preheating the coating powder supplied from the powder feeder including a housing, a heater mounted on the housing to perform resistance heating, and a powder transfer pipe formed within the housing in a screw shape in order for fluid communication between the powder feeder and the mixing chamber, the powder transfer pipe transferring the coating powder; a mixing chamber for mixing the heated main gas with the preheated coating powder; a temperature controller for adjusting temperature by controlling the powder preheating device and the gas heater; and a nozzle for spraying the coating powder mixed in the mixing chamber.