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· The density distribution produced
by compaction of a cylinder of steel powder with a single top punch is shown
opposite.
· Regions that have had
the largest relative motion of the powder particles during compaction have the
highest density.
· Near the die
walls, the density decreases uniformly from the bottom to the top of the green
cylinder. Friction between the press walls and the powder is responsible
for the curvature of the equal density contours.
· With a double acting punch the density will be lowest in the
center of the cylindrical compact.
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