粉末充填におけるすりきり時の粉末挙動 [in Japanese] Powder Behavior in Feed-shoe Movement During Powder Filling [in Japanese]
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Dimensional tolerance of P/M parts is improved by uniformly filling powders in a die cavity. In this study, the moving behavior of the powders filled into a rectangular die cavity during the pullback or shaking of a feed-shoe has been investigated using a newly devised visual apparatus. It is clarified that the powder behavior in the feedshoe movement during powder filling is divided into three regions; where the powders move as rolling, where the powders slide, and where the powders do not slide with the movement of the feed-shoe. As the width of the cavity becomes thinner, the powders are more difficult to move; therefore, the none-sliding region increases. When shaking of the feed-shoe is repeated, the moving distance of powders in a vertical direction becomes larger, and the filling density increases. However, the increasing moving distance of powders is greatly affected by the width of the die cavity.
- J. Jpn. Soc. Powder Powder Metallurgy
J. Jpn. Soc. Powder Powder Metallurgy 44(5), 487-491, 1997-05-15
Japan Society of Powder and Powder Metallurgy