Method for producing laminated object
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United States of America Patent
Stats
-
Nov 16, 1999
Grant Date -
N/A
app pub date -
Apr 24, 1998
filing date -
Apr 25, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A depositing step and an irradiating step are repeated alternately so as to pile solid layers to produce a laminated mold for casting an alloy melt. In the depositing step there is formed a deposited layer of sand coated with a thermosetting resin capable of forming a solid layer upon being irradiated with a laser beam. In the irradiating step, the deposited layer is irradiated with a laser beam to form a hardened solid layer. The irradiating step includes the operations of: distinguishing an outer skin portion from an inner portion of the deposited layer, and emitting a thick laser beam having a large diameter to harden the inner portion of the deposited layer, and emitting a thin laser beam having a diameter smaller than the thick laser beam to harden the skin portion of the deposited layer.
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