Continuous casting mold
AssigneeSouthwire Company
InventorGeorge C. Ward
Life of this patent
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Abstract
An improvement in wheel-band type continuous metal casting machines wherein a stationary corner filling device is used in combination with the usual moving mold members, such as the wheel and band, to modify the mold geometry so as to prevent corner cracking of the cast bar due to the uneven solidification stresses present in conventionally molded shapes having sharp or square edges, especially useful in modifying the usual trapezoidal cross sections of prior art molds for the casting of steel alloys.
Claims5
An improved process for the continuous casting of metal of the type wherein molten metal is cast into a continuously advancing molding cavity formed by at least one endless moving band in conjunction with other mold surfaces so as to form a molding cavity having at least one sharp corner at the junction of said band and said other mold surfaces, and wherein the molten metal is solidified in the shape of said molding cavity to form a cast bar which is then extracted for further processing, wherein the improvement comprises the steps of:
- introducing a fixed shaping means for eliminating the sharp corner into said advancing molding cavity near said junction;
- casting molten metal into the cavity and adjacent said shaping means;
- advancing the cavity without advancing the shaping means;
- cooling the molten metal to form a solid shell adjacent the mold surfaces while forming a non-sharp edge on the solidifying cast bar;
- advancing the cast bar with the cavity while sliding the cast bar along the shaping means and extracting the cast bar from the mold for further processing.
An improved process for the continuous casting of metals of the type wherein molten metal is cast into a moving mold formed by a peripheral groove in a rotating casting wheel and a band which seals a length of said groove, and wherein the molten metal is solidified in the shape of said mold to form a cast bar which is subsequently extracted from the mold for further processing, wherein the improvement comprises the step of modifying the cross-sectional shape of said mold by introducing into said moving mold a nonmoving mold defining means for eliminating the sharp corners of the mold which would otherwise occur at the junction of the wheel groove and the band;
- and wherein said step of modifying the shape of the mold comprises providing a barrier between the molten metal and said wheel and band junction at least until a solid skin forms on the solidifiying metal and forming a nonsharp edge on the resulting solid cast bar which has a nominal radius of at least ten percent of the mold depth.
Improved apparatus for the continuous casting of metals of the type having a continuously advancing molding cavity formed by an endless moving band in cooperation with a peripheral groove in a rotating casting wheel which is adapted to receive molten metal and solidifying said metal in the shape of said cavity to form a continuous length of cast bar, wherein the improvement comprises:
- an additional mold defining means for eliminating the sharp corner of the molding cavity which would otherwise occur at the junction of said band and said wheel, said means extending into the molding cavity without advancing as the casting wheel rotates and adapted to provide a barrier between cast molten metal and said junction.
Dependencies are inferred from the claim text.