Patent ID: 8267152

Claim:
A twin-roll continuous caster configured to cast molten metal supplied to a molten metal pool between a pair of cooling rolls into a cast piece by cooling and solidifying the molten metal on surfaces of the pair of cooling rolls, wherein the surfaces of each of the pair of cooling rolls has end portions at both ends thereof, and a central portion extending between the both end portions, a plurality of ridges is formed in the central portion of the cooling rolls, each of the plurality of ridges is separated in a rotational direction of the cooling rolls by a plurality of discontinuous sections, and a length of each ridge in the rotation direction of the cooling rolls is longer than a length of each discontinuous section in the rotational direction, laterally opposite edges of the cast piece are generated by cooling and solidifying the molten metal with cast-piece-edge generation means provided at the end portions of each of the pair of cooling rolls, and a laterally central portion of the cast piece is generated by cooling and solidifying the molten metal on surfaces of the central portion of the pair of cooling rolls, the laterally central portion of the cast piece containing the unsolidified molten metal between solidified shells.