Shrink-fitting process for making an erosion and wear resistant shot chamber for die casting applications
OwnerQingyou Haninventor
Life of this patent
Estimating the term…
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 shrink fitting process for forming a one-piece shot chamber having a liner 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.
Claims17
A method for forming an erosion, oxidation, and wear resistant composite shot chamber for die casting processes, the method comprising the steps of:
- preparing a liner with a minimum wall thickness of about 1 mm as an internal layer of said shot chamber, the liner having a tubular external surface and a tubular inner surface;
- preparing an outer layer of said shot chamber from a ferrous alloy having an inner diameter smaller than an external diameter of said liner at room temperature and heating said outer layer up to a predetermined temperature to make the inner diameter of said outer layer greater than the external diameter of the liner;
- and
- shrink fitting the outer layer of the shot chamber on the liner,
- whereby said outer layer and said liner will be joined together to form a 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 processes, the method comprising the steps of:
- preparing a liner with a minimum wall thickness of about 1 mm as an internal layer of said shot chamber, the liner having a tubular external surface and a tubular inner surface;
- preparing an outer layer of said shot chamber from a ferrous alloy;
- forming at least one channel of a predetermined shape and layout by machining at a junction of the liner and the outer layer of said shot chamber;
- coating the tubular external surface of the liner with a layer of metallic solder material;
- heating said outer layer up to a predetermined temperature;
- and
- shrink fitting the outer layer of the shot chamber on the liner using heat in the outer layer to melt the solder material and to solder the outer layer with the liner, and
- whereby said outer layer and said liner will be joined together to form a composite shot chamber of a one-piece (unitary) construction and multi-layered materials and containing the at least one channel for passing a fluid or for placing heating elements for thermal management of the shot chamber during die casting operation.
Dependencies are inferred from the claim text.