Casting process for making an erosion and wear resistant shot chamber for die casting applications
OwnerQingyou Haninventor
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Abstract
A process of forming an erosion, oxidation, and wear resistant shot chamber, either a gooseneck or a shot sleeve, is provided. The process utilizes a casting process for forming a one-piece shot chamber having a liner metallurgically bonded to the bulk portion of the shot chamber. Channels of predetermined shape and layout are built on the tubular external surface of the liner for facilitating thermal management of the shot chamber during die casting operations.
Claims20
A method for forming an erosion, oxidation, and wear resistant composite shot chamber for die casting operations, the method comprising the steps of:
- preparing a liner of a metallic alloy with a minimum wall thickness of about 1 mm as an internal layer of said composite shot chamber, the liner having a tubular external surface and a tubular inner surface;
- placing the liner in a mold cavity and using the liner as a core for forming an outer layer of said composite shot chamber;
- pouring a ferrous liquid alloy into the mold cavity to form the outer layer of said composite shot chamber, the outer layer bonding the liner by metallurgical bonds at the tubular external surface of the liner and forming a solid said composite shot chamber during a pouring and solidification stage of such a casting process;
- and
- machining the solid said composite shot chamber to its final dimensions,
- wherein said outer layer and said liner are joined together to form said composite shot chamber of a one-piece (unitary) construction.
A method for forming an erosion, oxidation, and wear resistant composite shot chamber for die casting operations, the method comprising the steps of:
- preparing a liner of a metallic alloy with a minimum wall thickness of about 1 mm as an internal layer of said composite shot chamber, the liner having a tubular external surface and a tubular inner surface;
- building at least one channel of a predetermined shape and layout on the tubular external surface of the liner;
- placing the liner with said at least one channel in a mold cavity and using the liner as a core for forming an outer layer of said composite shot chamber;
- pouring a ferrous liquid alloy into the mold cavity to form the outer layer of said composite shot chamber, the outer layer bonding the liner by metallurgical bonds at the tubular external surface of the liner and forming a solid said composite shot chamber during a pouring and solidification stage of such a casting process;
- and
- machining the solid said composite shot chamber to its final dimensions,
- wherein said composite shot chamber consists of multi-layered materials, is of a one-piece (unitary) construction, and contains the at least one channel for passing a fluid or for placing heating elements for thermal management of said composite shot chamber during die casting operations.
Dependencies are inferred from the claim text.