CPC B22D 11/0662 (2013.01) [B22D 11/068 (2013.01); B22D 11/0622 (2013.01)] | 20 Claims |
1. An electromagnetic device for laterally containing liquid aluminum or a liquid aluminum alloy, having a first electrical conductivity, at one open side end of a passage defined between two counter-rotating casting rolls, said device comprising
a magnetic yoke made of a first material having a second electrical conductivity either lower than or equal to said first electrical conductivity, said first material being ferromagnetic material and said magnetic yoke ending with two mutually proximal wedge-shaped ends, said wedge-shaped ends having respective inner surfaces, which are flat and substantially parallel to each other and face each other defining a gap, and respective outer surfaces, arranged one on one side and the other on the other side with respect to a plane lying in said gap, said outer surfaces of the two wedge-shaped ends being converging towards said plane so as to define a wedge shape whereby both said wedge-shaped ends can be inserted at least partially between the two casting rolls;
at least one coil wound on at least one stretch of the magnetic yoke and adapted to be supplied by electric current;
at least one plate inserted in said gap;
wherein said at least one plate is made of a second material having a third electrical conductivity either greater than or equal to said first electrical conductivity, whereby said at least one plate can electromagnetically shield said inner surfaces with respect to each other;
wherein said at least one plate comprises a flat part arranged between the flat and substantially parallel inner surfaces of the wedge-shaped ends.
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