Fast melting induction furnace with pressing cover

Details Fast melting induction furnace with pressing cover Fast melting induction furnace with pressing cover

1992-09-18

1993-11-30

Reynolds, Bruce A.

Industrial electric heating furnaces

Induction furnace device

With internal atmosphere control

373146, 373156, 373138, 75 1014, F27D 706

Patent

active

052672581

ABSTRACT:
In a fast-melting induction furnace, an elevationally movable pressing cover 4 suppresses the swell of molten metal 3 inside a crucible 2 on which a coil 1 is wound. The pressing cover 4 has a lower surface which is made concave. An upper half part of the motion of the molten metal 3 caused by electromagnetic force is made in conformity with the concave shape of the lower surface 5, so that the dangerous blowout of molten metal through a gap 8 is effectively prevented. Accordingly, the fast melting by the supply of high electric power can be performed. The lower surface 5 may be shaped as a cylindrical surface, a paraboloidal surface of revolution, a partial spherical surface, or the like, or may be shaped like a runner bucket of a Pelton turbine which has a slightly projecting center portion.

REFERENCES:
patent: 3413401 (1968-11-01), Dillon et al.
patent: 3656946 (1972-04-01), Inque et al.
patent: 3811001 (1974-05-01), Lethen
patent: 4486889 (1984-12-01), Hegewaldt et al.
patent: 4773079 (1988-09-01), Bruckmann et al.
patent: 5109389 (1992-04-01), Stenzel

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