Apparatus for continuous casting of metal strips

Apparatus for continuous vertical casting of metal strips, comprising: a mould having top and bottom ends an open-ended mould cavity (C), a tundish having a discharge opening (A) in direct communication with the mould cavity (C) to feed molten metal into a mould entrance opening (E) past an interface between the tundish and the mould; a sealing device forming a seal at said tundish-mould interface to prevent molten metal from entering said interface, and a device for supplying molten metal to the tundish and maintaining a level of molten metal therein. The scaling device comprises a pair of flat horizontal surfaces (A, B), one on the mould around the entrance opening (E) and one on the tundish around the discharge opening (A), and a sealing element (A) formed of a sheet of graphite and being in constant sealing engagement with both said surfaces (A, B).