HIGH-DENSITY MOLDING DEVICE AND HIGH-DENSITY MOLDING METHOD FOR MIXED POWDER
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United States of America Patent
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Issued Date -
Mar 19, 2015
app pub date -
Apr 11, 2013
filing date -
Apr 12, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A first die is filled with a mixed powder prepared by mixing a low-melting-point lubricant powder into a basic metal powder in a weight ratio of 0.1 to 0.2%. A first pressure is applied to the mixed powder in the first die to form a mixed powder intermediate compressed body having a true density ratio of 80 to 90%. The mixed powder intermediate compressed body is heated to the melting point of the lubricant powder. The heated mixed powder intermediate compressed body is placed in a second die that is pre-heated to the melting point of the lubricant powder. A second pressure is applied to the mixed powder intermediate compressed body in the second die to form a high-density mixed powder final compressed body.
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