| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nozzle for cold spraying and a cold spray device using it that can minimize the clogging of the nozzle when used for powder coating of a soft material, can prevent itself from wearing down when used for powder coating of a material of a high hardness, can be used for a long period of time making itself easily applicable to an industrial use, and can prepare a high-quality coating for a long period of time. <P>SOLUTION: The nozzle for cold spraying and cold spray device using it comprise a hollow nozzle 10 comprising a converging suction member 2 having a converging cross section, a throat 4 connected to the converging end of the converging suction member 2, and an outlet path 6 connected to the end of the throat 4; and an ejection tube 20 coaxially disposed in the converging suction member 2 so that its end, namely its ejection opening 12 is coaxially disposed in the throat 4 or downstream of the throat 4 in the outlet path 6. The velocity of the powder at the end of the outlet path 6 is to be controlled in a range of 300 to 1,200 m/s. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
