Methods and apparatus for making cast hollows

Details Methods and apparatus for making cast hollows Methods and apparatus for making cast hollows

1977-10-25

1979-03-27

Lazarus, Richard B.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164154, 164 52, 164252, B22D 2702

Patent

active

041460774

ABSTRACT:
A method and apparatus are provided for forming hollow superalloy ingots by melting a molten superalloy electrode by ESR techniques into a molten slag held in a generally cylindrical mold having an axially movable mandrel until the molten metal is adjacent the level of but not over the top of the mandrel, cooling the metal sufficiently to form supporting external and internal walls, moving the mandrel vertically relative to the cooled metal, continuing to melt metal into said slag while moving the mandrel at a rate such that the molten metal remains at a substantially constant level adjacent the top of the mandrel and cooling the formed hollow ingot.

REFERENCES:
patent: 3456715 (1969-07-01), Freedman et al.
patent: 3610320 (1971-10-01), Medovar
patent: 3643724 (1972-02-01), Lee
patent: 3721286 (1973-03-01), Paton et al.
patent: 3768541 (1973-10-01), Paton et al.
patent: 3834443 (1974-09-01), Ujiie
patent: 3834447 (1974-09-01), Luchok et al.
patent: 3942105 (1976-03-01), Bondarenko et al.
patent: 3971430 (1976-07-01), Paton et al.
patent: 3990500 (1976-11-01), Paton et al.
patent: 3999595 (1976-12-01), Medovar et al.
patent: 4000361 (1976-12-01), Bondarenko et al.

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