Method of and apparatus for casting
AssigneeCosworth Research and Development Limited
InventorRobert A. Smith
Life of this patent
Estimating the term…
Abstract
A method of making a casting comprising the steps of, at a casting station, feeding molten metal from a primary source of molten metal into a mould cavity through an ingate below the top of the mould cavity, placing the cavity out of feeding relationship with the primary source by changing the orientation of the cavity relative to the direction of gravity to prevent flow of molten metal from the cavity towards the primary source and to permit of flow of metal from a secondary source to the cavity, the cavity being continuously connected to the primary source during said change of orientation, transferring the mould cavity to a cooling station spaced from the casting station and, at the cooling station, permitting molten metal to flow to the cavity from the secondary source while the metal in the cavity solidifies.
Claims31
A method of making a casting comprising the steps of, at a casting station, feeding molten metal from a primary source of molten metal into a mould cavity through an ingate below the top of the mould cavity, placing the cavity out of feeding relationship with the primary source comprising causing relative movement between the cavity and the primary source to change the orientation of the cavity relative to the direction of gravity to prevent flow of molten metal from the cavity towards the primary source and to permit of flow of metal from a secondary source to the cavity, the cavity being continuously connected to the primary source during said change of orientation, and separating the cavity from the primary source, maintaining the primary source at the casting station, transferring the mould cavity to a cooling station spaced from the casting station and, at the cooling station, permitting molten metal to flow to the cavity from the secondary source whilst the metal in the cavity solidifies.
An apparatus for making a casting comprising a primary source for molten metal, a mould having a mould cavity, feed means to feed molten metal, in use, from the primary source into the mould cavity through an ingate below the top of the mould cavity, when the mould is at a casting station, means for placing the mould cavity out of feeding relationship with the primary source comprising means to cause relative movement between the cavity and the primary source to change the orientation of the mould cavity relative to the direction of gravity to prevent flow of molten metal from the cavity towards the primary source and to permit of flow of metal from a secondary source to the cavity, means continuously to connect the cavity with the primary source during said change of orientation, means to separate the cavity from the primary source, means to maintain the primary source at the casting station and means to transfer the mould cavity to a cooling station spaced from the casting station whereat molten metal may flow to the cavity from the secondary source whilst the metal in the cavity solidifies.
Dependencies are inferred from the claim text.