| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder feeding device, on the feed of raw material powder into the molding rubber mold of a dry isotropic pressing apparatus, which can uniformly feed the raw material powder with high density within the molding rubber mold, and also reduce a filling time.SOLUTION: The powder feeding device 40 of a dry isotropic pressing apparatus has a constitution that a cylindrical power feed nozzle 4 is arranged within a bottomed cylindrical molding rubber mold 1 in a state where a gap is made between the outer circumferential face of the powder feed nozzle 4 and the inner peripheral face of the molding rubber mold 1. The tip part 5 of the power feed nozzle is provided with a vacuum deaerating mechanism of venting air included in raw material powder, a raw material powder extrusion mechanism of extruding the raw material powder to the tip part 5 of the power feed nozzle is provided at the inside of the power feed nozzle 4, and the raw material powder is fed to the inside of the molding rubber mold 1 by the powder feed nozzle 4 using a controlling means of increasing the power feed nozzle 4 in accordance with the increase in the upper edge face of the raw material powder during the feed of the raw material powder. |
