Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1994-06-22
1996-01-30
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164428, 164480, 164503, B22D 1106, B22D 2702
Patent
active
054874211
ABSTRACT:
A strip casting apparatus comprises a pair of counter-rotating casting rolls having a vertically extending, arcuately tapering gap therebetween for containing a pool of molten metal. The gap has an open end near which is an electromagnetic dam for preventing the escape of molten metal through that open end. Various expedients are provided for improving the operation and efficiency of the dam. In one embodiment, projections of magnetic material extend from the dam in mutually overlapping relation with peripheral lips on the casting rolls. In another embodiment, the dam has a confining coil with a front surface (a) facing the open end of the gap and (b) having an arcuately tapering contour conforming to the contour of the gap. The electric current flowing through (i) the wide upper part of the confining coil's tapered front surface, facing the wide upper part of the molten metal pool, is greater than the current flowing through (ii) the narrow lowermost part of the confining coil's front surface, facing the narrow lower part of the molten metal pool.
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patent: 5197534 (1993-03-01), Gerber et al.
patent: 5251685 (1993-10-01), Praeg
patent: 5279350 (1994-01-01), Gerber
Inland Steel Company
Lin Kuang Y.
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