| 摘要 |
PROBLEM TO BE SOLVED: To provide an ejector type powder supply apparatus capable of preventing the inflow of the open air before the supply of powder or after the completion of the supply of the powder. SOLUTION: This powder supply apparatus has a hopper 13 having a powder supply port 14 provided to the lower end thereof, a powder supply pipe 12 for connecting the powder supply port 14 attached to the lower part of the hopper 13 and a powder treatment device, and an air nozzle 25 for supplying compressed air into the power supply pipe 12. A valve disc 26 capable of advancing the retreating is provided in the powder supply pipe 12 to open and close the powder supply port 14. The valve disc 26 is driven by a pneumatic cylinder 30, and the air nozzle 25 is arranged to the leading end of the valve disc 26. A guide 41 is inserted into the valve disc 26 and an air passage 45 for supplying compressed air to the air nozzle 25 is formed to the guide 41. The valve disc 26 is operated before the powder is supplied or after the supply of the powder is completed to close the powder supply port 14 to prevent the inflow of the open air. COPYRIGHT: (C)2004,JPO
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