Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Using laser sintering of particulate material to build...
Patent
1998-04-24
1999-11-16
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Using laser sintering of particulate material to build...
264219, 264308, B29C 3338, B29C 3508, B29C 4102
Patent
active
059852046
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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patent: 5718279 (1998-02-01), Satoh et al.
U.S. Patent application Ser. No. 09/010,855 filed Jan. 22, 1998.
Otsuka Yukio
Ozaki Motoaki
Tentoni Leo B.
Toyota Jidosha Kabushiki Kasiha
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