Method of making a three-dimensional sintered product
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United States of America Patent
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Aug 14, 2007
Grant Date -
Nov 18, 2004
app pub date -
Sep 29, 2003
filing date -
Sep 30, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
To make a three-dimensional object, an optical beam is first irradiated on a predetermined portion of a powder layer to form a sintered layer, which is then covered with a new powder layer. The optical beam is again irradiated on a predetermined portion of the new powder layer to form another sintered layer that has been united with the underlying sintered layer. These processes are repeatedly carried out to form a plurality of sintered layers united together. When the second lower density layer is formed on the first higher density layer, a powder material layer for the lower density layer is formed at a predetermined thickness so as to have a thickness suitable for sintering condition and then the powder material layer is sintered to form the lower density layer.
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