| 摘要 |
PURPOSE:To inhibit the plugging of a spraying nozzle of a passage on the way, by forcibly circulating the gaseous mixture of air with powder through a circulation line by a blower to sufficiently mingle it, and then carrying it to the spraying nozzle. CONSTITUTION:The sprayer comprises a circulation line 25 for circulating the gaseous mixture of air with a powdery body, a blower 31 incorporated in the middle of said line for forcibly circulating the gaseous mixture, a powder injector 32 capable of adjusting the amount of a powdery body to be injected into the circulation line 25 in response to the speed of rotation of a screw 34, an agitator member 39 provided inside a powder-receiving tank 33 for agitating a powdery body in the tank 33, and a spraying nozzle 26 and an air intake opening 40 provided in the middle of the circulation line 25. Hereon, said powder injector 32 has the powder receiving tank 33, a throttle hole 35 provided at the bottom of said tank and communicated to the circulation line 25, and the screw 34 to be rotationally driven by a motor 37 inserted into said throttle hole 35.
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