MIXED POWDER HIGH-DENSITY MOLDING METHOD, MIXED POWDER HIGH-DENSITY MOLDING SYSTEM, AND HIGH-DENSITY THREE-LAYER GREEN COMPACT
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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 sequentially filled with a first-layer mixed powder that is a mixture of a basic metal powder having a small particle size and a low-melting-point lubricant powder, a second-layer mixed powder that is a mixture of the basic metal powder having a large particle size and the low-melting-point lubricant powder, and a third-layer mixed powder that is a mixture of the basic metal powder having a small particle size and the low-melting-point lubricant powder. A first pressure is applied to each mixed powder to form an intermediate green compact. The intermediate green compact is heated, and placed in a second die. A second pressure is applied to the intermediate green compact to form a high-density three-layer green compact.
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