Method and apparatus for melting and casting metal
AssigneeCosworth Research and Development Limited
InventorJohn Campbell
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Abstract
A method of melting and casting metal comprising the steps of melting metal in a melting vessel, transferring metal from the melting vessel into a casting vessel by flow of metal under gravity and pumping metal against gravity from the casting vessel into a mold. The level of the top surface of the metal as the metal leaves the melting vessel is above the top surface of the metal in the casting vessel by not more than a maximum distance above which excessive turbulence occurs. The maximum distance lies in the range 50-200 mm.
Claims14
A method of melting and casting metal comprising the steps of melting metal in a melting vessel, advancing a quiescent flow of said molten metal, by gravity, along the whole of a path from said melting vessel into a casting vessel to provide a reservoir of molten metal which dwells in said casting vessel, said path being defined to maintain the level of the top surface of the metal as the metal leaves the melting vessel above the top surface of the metal in the casting vessel by not more than a distance of 200 mm and sequentially pumping a discrete volume of said molten metal against gravity from the casting vessel into each of a plurality of individual moulds.
An apparatus for melting and casting metal comprising a melting vessel, a casting vessel, means defining a path for quiescent flow of molten metal under gravity and along the whole of the path from said melting vessel to said casting vessel so that the level of the top surface of said molten metal as said molten metal leaves said melting vessel is above the top surface of the molten metal in said casting vessel by not more than a distance of 200 mm and a pump to pump sequentially a discrete volume of metal against gravity from the casting vessel into each of a plurality of individual moulds.
Dependencies are inferred from the claim text.