Review
Effect of the History of Powder Movement on Filling Density and Highly Precise Powder Filling
2017 Volume 64 Issue 2 Pages 55-60
Details
2017 Volume 64 Issue 2 Pages 55-60
ABSTRACT
The filling density in production becomes stable after it decreases rapidly in the initial stage of the consecutive compacting. Flowability fluctuation caused by history of powder movement was assumed to be one of the causes and experiments were conducted with pre-mixed powder of Fe-2 mass%Cu-0.9 mass%C-0.8 masss%Lubric ant. The experiments of this work verified that filling density is greatly affected by the history of the powder movement right before filling. Based upon the results, a highly precise filling system was developed. The new system enabled to abolish adjustment of compacting condition and to reduce defective compacts.
