METHOD AND DEVICE FOR UPHILL CASTING, INVOLVING A CASTING MOULD COMPRISING A POURING GATE LYING UNDERNEATH AND A SLIDING CLOSURE

摘要

The invention relates to a method and a device for uphill casting/low-pressu re casting especially of light metal alloys said device comprising a casting furnace (81) lying below a casting plate (51) and comprising an ascending pi pe (83), said pipe comprising an orifice (99); and a casting mould having a pouring gate (79) lying underneath and a sliding closure (11) which forms a through channel having an essentially straight longitudinal course for casting. In order to close the through channel, the sliding closure comprise s two immediately adjacent opening segments pertaining to the through channel which are displaced towards each other transversally in relation to the longitudinal course of the through channel, immediately after the casting wh en the molten metal is still in a liquid state in the pouring gate, in such a w ay that one upper opening segment remains openly connected, without a back draf t, to the pouring gate, and a lower opening segment remains openly connected to the orifice of the ascending pipe. Said opening segments are completely offs et in relation to each other. The level of molten metal in the ascending pipe i s then lowered below the orifice of the ascending pipe and the lower opening segment of the through channel is thereby emptied of the molten metal.