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US 5,672,313 AGranted
Method of manufacturing powder molding and powder feeder
AssigneeSumitomo Electric Industries, Ltd.
InventorsRyuji Shiga, Yoshishige Takano, Yoshinobu Takeda
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Abstract
A material powder is packed in a cavity of a mold with high and uniform density to manufacture a powder molding a material powder in a shoe box 12 is fed into a cavity 6 formed in a mold 1 by moving the shoe box 12 over the cavity 6 while oscillating the shoe box until the density of the powder in the cavity increases to at least 1.1 times the apparent density. The powder is then compression-molded.
Claims7
A method of manufacturing a powder molding, comprising the steps of:
- feeding a material powder from a shoe box through a bottom of the shoe box into a cavity formed in a mold while oscillating the material powder at an oscillation frequency of 10-200 Hz and at an oscillation pressure of 1-50 kg such that the density of the powder in the cavity becomes at least 1.1 times the apparent density;
- and
- compressing the powder in the cavity.
A powder feeder for use in manufacturing a powder mold, comprising:
- a mold part having a cavity for compression molding;
- and
- a shoe box mounted so as to be movable toward and away from said cavity, said shoe box having a lower portion provided with a plurality of cells having open tops and bottoms, said cells each comprising a space defined in said lower portion by a plurality of vertical partitioning plates;
- and
- an oscillator mounted on said shoe box.
2 more elements
Dependencies are inferred from the claim text.