Selective laser sintering with assisted powder handling
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United States of America Patent
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-
Jul 3, 1990
Issued Date -
N/A
app pub date -
Sep 5, 1989
filing date -
Oct 17, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the powder to produce a sintered mass. The computer either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For each cross-section, the aim of the laser beam is scanned over a layer of powder and the beam is switched on to sinter only the powder within the boundaries of the cross-section. Powder is applied and successive layers sintered until a completed part is formed. Preferably, the powder is deposited to the target area of the laser and attains high bulk density during sintering.
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