Filling-tube construction for providing a connection between a mould to be filled with molten metal and a mould-filling furnace

Abstract

In a filling-tube construction () for providing a connection between a mould () to be filled with molten metal and a mould-filling furnace () containing molten metal (), said mould () having at least one casting cavity (), the lowermost part of each such cavity communicating with a filling duct (), at least one end of which is open to the outside of said mould () and adapted to be temporarily connected to the filling-tube construction () to receive molten metal () from the mould-filling furnace (), the mould-filling furnace being adapted to contain molten metal () and to transfer said molten metal () under a controlled pressure through the filling-tube construction () and to the filling duct (), the filling-tube construction comprises a first section () extending from a position close to the bottom of said mould-filling furnace () up to an intermediate position closer to the filling duct () and at least one separate second section () providing a connection from the upper end of the first section () to the open end of the filling duct () and adapted to provide a fluid-tight connection to the upper end of the first section () and the open end of the filling duct (). In this way an easy adjustment and/or exchange of parts of the filling-tube constructions can be provided by simply adjusting and/or exchanging the second section (), without disassembly of the connection between the first section () and the mould-filling furnace (). The invention also includes a method of modifying a conventional constructed filling tube to a filling tube as described above.