Metal founding – Including means to directly apply magnetic force to work or... – By electromagnetic means
Patent
1983-06-22
1987-05-05
Lin, Kuang Y.
Metal founding
Including means to directly apply magnetic force to work or...
By electromagnetic means
B22D 2702
Patent
active
046624317
ABSTRACT:
Apparatus for producing dense homogeneous metal cast in long lengths by introducing liquid metal into the lower portion of a casting vessel in the presence of an elongated upwardly-traveling alternating electromagnetic levitation field that provides a levitation ratio of from 75% to 200% of the weight per unit length of the liquid metal. The apparatus provides cooling for solidifying the metal while moving upwardly through the field, and a withdrawal mechanism for removing solidified metal product from the upper portion of the field. The electromagnetic field producing means is designed to establish an alternating electromagnetic field having a frequency at or near a value F=36.rho./D.sup.2 where F is the frequency in kilohertz, .rho. is the resistivity of the liquid metal column in micro-ohm-centimeters and D is the average diameter of the solidified metal rod product in millimeters.
Frost Robert T.
Lowry Hugh R.
Bahr Arthur E.
General Electric Company
Helzer Charles W.
Lin Kuang Y.
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