Method and apparatus for creating a free-form three-dimensional article using a layer-by-layer deposition of molten metal and using a stress-reducing annealing process on the deposited metal
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United States of America Patent
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May 5, 1998
Grant Date -
N/A
app pub date -
Sep 8, 1995
filing date -
Sep 8, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for the accurate formation of a three-dimensional article comprises providing a supply of substantially uniform size droplets of a desired material wherein each droplet has a positive or negative charge. The supply of droplets is focused or aligned into a narrow stream by passing the droplets through or adjacent an alignment means which repels each droplet toward an axis extending through the alignment means. The droplets are deposited in a predetermined pattern at a predetermined rate onto a target to form the three-dimensional article without the use of a mold of the shape of the three-dimensional article. A means for reducing stress anneals portions of the deposited droplets which form a newly formed surface of the three-dimensional article.
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