Method of freeform fabrication by selective gelation of powder suspensions
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United States of America Patent
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Dec 9, 1997
Grant Date -
N/A
app pub date -
May 23, 1996
filing date -
May 23, 1996
priority date (Note) -
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Abstract
The present invention is a novel method for freeform fabrication. Specifically, the method of solid freeform fabrication has the steps of: (a) preparing a slurry by mixing powder particles with a suspension medium and a gelling polysaccharide; (b) making a layer by depositing an amount of said powder slurry in a confined region; (c) hardening a selected portion of the layer by applying a gelling agent to the selected portion; and (d) repeating steps (b) and (c) to make successive layers and forming a layered object. In many applications, it is desirable to remove unhardened material followed by heating to remove gellable polysaccharide then sintering.
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