Method of making forms for investment casting and products produ

Details Method of making forms for investment casting and products produ Method of making forms for investment casting and products produ

1980-03-20

1982-09-07

Spruill, R. L.

Metal founding

Process

Shaping a forming surface

164 35, 164DIG4, B22C 702

Patent

active

043478883

ABSTRACT:
A method of making a form of a desired shape, for use in an investment casting technique which comprises forming a first sheet of formable material to a shape which approximates to the desired shape of the form, disposing the formed shape around a layer of deformable hardenable material, applying a compressive force to the formed shape to deform the underlying hardenable material to a desired shape, hardening the hardenable material to produce a form precursor, removing the formed shape from the hardened form precursor and utilizing the hardened form precursor to form a second sheet of formable material into the form of the desired shape. The invention also includes a method of making crowns by an investment casting technique utilizing the form produced by this method.

REFERENCES:
patent: 1150102 (1915-08-01), Cruickshank
patent: 3375582 (1968-04-01), Myerson
patent: 3532776 (1970-10-01), Kopp
patent: 3661198 (1972-05-01), Evenson

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