Method of producing open-celled metal structures

Details Method of producing open-celled metal structures Method of producing open-celled metal structures

1990-08-24

1991-05-21

Batten, Jr., J. Reed

Metal founding

Process

Shaping a forming surface

164 35, 164 45, 264221, B22C 300, B22C 702, B22D 2300, B22D 2500

Patent

active

050167022

ABSTRACT:
Open-celled metal structures are produced which have walls and webs of uniform strength throughout. The structures may also have an irregular surface pattern. To make a strengthened positive pattern, the method comprises application of at least one layer of a strengthening agent such as poly(methyl methacrylate) or polyester resin to a plastic substrate used for ceramic mold formation. The strengthened positive pattern is embedded in a ceramic mass, and heated to incinerate and remove the plastic substrate, which results in voids in the ceramic mass. Molten metal is poured into the ceramic mass. After solidification, the ceramic mass is removed to form the open-celled metal structure.

REFERENCES:
patent: 3616841 (1971-11-01), Walz
patent: 3845181 (1974-10-01), Ravault
patent: 3899556 (1975-08-01), Heide et al.
patent: 3946039 (1976-03-01), Walz
patent: 4600546 (1986-07-01), Grundei
patent: 4781721 (1988-11-01), Grundei
patent: 4812278 (1989-03-01), Natori et al.

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