| 摘要 |
PROBLEM TO BE SOLVED: To suppress variation in powder filling density from part to part in a cavity resulting from uneven distribution of powder in a powder feeding box in order to obtain a green compact having an equalized molding density in each part thereof by molding using a powder molding apparatus.SOLUTION: In a powder molding apparatus, powder P is fed from a powder feeding box 13 sliding on a die plate 6 into a cavity 5 of a molding die, and the powder is compressed by a lower punch 2 and an upper punch 3 opposite thereto to be molded. An upper surface 4a of a core rod 4 is formed to be a slope inclined downward in the forward direction of the powder feeding box. When the powder is fed into the cavity 5, the core rod 4 is located at a position lower than the upper surface of a die 1. After the powder is fed into the cavity 5, overfill operation is performed so that the core rod 4 is relatively raised with respect to the die 1. |
