Quick change crucible for vacuum melting furnace

Details Quick change crucible for vacuum melting furnace Quick change crucible for vacuum melting furnace

1994-05-20

1995-05-16

Reynolds, Bruce A.

Industrial electric heating furnaces

Induction furnace device

Coreless

373151, 264 60, 432156, H05B 622

Patent

active

054167957

ABSTRACT:
A crucible assembly for use in induction melting furnaces utilizes an inner crucible formed of partially stabilized zirconia and an outer support member formed of a sintered alumina. The crucibles are in the shape of a cylinder with a closed bottom wall and in the cylindrical wall area, the inner crucible and the outer support member are separated by a layer of porous ceramic fibers of alumina and silica and the entire assembly has been centered as a unit so that the outer support member with a porous layer allows for the thermal expansion and contraction of the inner crucible while limiting any stresses applied to the inner crucible and providing additional strength and support for the inner crucible.

REFERENCES:
patent: 3401227 (1968-09-01), Dunlevy et al.
patent: 3708600 (1973-01-01), Nickel et al.
patent: 3751571 (1973-08-01), Burrows
patent: 4160796 (1979-07-01), Lirones
patent: 4351058 (1982-09-01), Florian et al.

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