Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 1, 2009
Patent Application Number
10596004
Date Filed
November 24, 2004
Patent Primary Examiner
Patent abstract
A hydroxy fatty acid salt having an average particle diameter of from 5 μm to 100 μm with a composition of from 0.3 wt % to 2 wt %, and more preferably, from 0.5 wt % to 2 wt % is added to a raw material powder in powder metallurgy, and worm molding is performed. In addition, a hydroxy fatty acid salt having an average particle diameter of 50 μm or less is attached on a mold in advance, and after that, the warm molding is performed. As a hydroxy fatty acid salt, 12-hydroxy lithium stearate is suitably used.
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