Electromagnetic levitation casting apparatus having improved lev

Details Electromagnetic levitation casting apparatus having improved lev Electromagnetic levitation casting apparatus having improved lev

1984-06-19

1986-09-02

Terapane, John F.

Metal founding

Including means to directly apply magnetic force to work or...

By electromagnetic means

164466, B22D 110, B22D 2702

Patent

active

H00001350

ABSTRACT:
An electromagnetic levitation casting apparatus having an improved levitation coil assembly employing flux concentration devices, is provided. The improved levitation coil assembly comprises a plurality of slotted annular slugs surrounding a tubular casting vessel within which a liquid metal column is to be levitated and solidified by cooling pursuant to the General Electric Levitation Casting (GELEC (.RTM.)) process. Each of the slotted annular slugs is inductively coupled to a respective electromagnetic field producing coil having a large number of turns surrounding the slug. Each slotted annular slug serves to concentrate the magnetic field produced by its associated primary mutli-turn coil to substantially the interior cross sectional area of the tubular casting vessel it surrounds and functions as a current step-up transformer. A separate slotted annular slug and associated surrounding electromagnetic multi-turn field producing coil is provided for each phase winding of the multi-phase excitation employed in the improved levitation coil assembly.

REFERENCES:
patent: 3872379 (1975-03-01), Brooks et al.
patent: 4294304 (1981-10-01), Delassus
patent: 4414285 (1983-11-01), Lowry et al.

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