Method for the semi-permanent mold casting process
US10682695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2018 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | May 7, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/088
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for casting metal using a semi-permanent mold connected to a feed portion includes forming a coolant jacket in a sprue of the feed portion. A coolant source is connected to the coolant jacket. A metal in a molten state is poured into the feed portion for gravity induced flow into the semi-permanent mold. A wall thickness of the sprue is predetermining which minimizes heat transfer from the sprue, thereby forcing the metal in the molten state to cool slower in the sprue than in the mold. After a predetermined time for the metal to cool to a solid state in the mold, flow of a coolant from the coolant source into the coolant jacket is initiated to cool the metal in the sprue before opening the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.