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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Apr 30, 2015
app pub date -
Apr 22, 2013
filing date -
Apr 23, 2012
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Abstract
A first die is filled with a mixed powder that is a mixture of a basic metal powder and a low-melting-point lubricant powder. A first pressure is applied to the mixed powder to form a mixed powder intermediate compressed body having a protrusion that protrudes in the pressing direction as compared with the configuration of a mixed powder final compressed body. 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. A second pressure is applied to the mixed powder intermediate compressed body to press-mold the mixed powder intermediate compressed body while crushing the protrusion in the pressing direction to form the high-density mixed powder final compressed body having high density and the desired configuration.
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