Abstract
The cylinder with flange, diameter: 40mm, thickness: 3mm is formed from alumina granule with a resin binder(3 mass% PVA) and liquid paraffin by changing the compacting rate for the purpose to investigation of the powder flowability during pressing. The density of green compact increases at higher compacting rate by flow compaction due to the increase of flange density. The punch stroke to compacting pressure is longer by flow compaction compared with that by dry compaction. When the densified powder by flow compaction at higher compacting rate flows from die inner into the flange, the density distribution in the flange becomes uniformity, and the density of green compact increases consequently.
