To eliminate the clogging of a pipe, to restrain the generation of dust and to improve the surroundings by forming negative pressure in a conveying pipe with suction from a supplying hopper side and conveying powder in the conveying pipe into the supplying hopper side.
Exhaust nozzles 18a, b are fitted to flexible containers 10a, b, and blasting means 17a, b and the conveying pipe 12 are connected. One side of the flexible container 10a side is opened with a switching valve 11 and the powder in the inner part is stirred by blasting into the flexible container 10a with the blasting means 17a. A suction pump 15 is worked, and the powder in the flexible container 10a is sucked into the supplying hopper 14 through the conveying pipe 12. The powder is not directed to the suction pump 15 with a filter 24 at the upper part of the supplying hopper 14 and only the air is directed to the suction pump 15. When the conveying is completed, the suction pump 15 is stopped and a shut-off valve 16a is opened and a vibrator 20 is vibrated to supply the powder into the mold.
OKAZAKI TOSHIYUKI
AOKI SHUJI
TOYO HITEC KK
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