Casting of metal articles
US4693292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Jan 21, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D18/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of casting metal articles by feeding molten metal upwardly against the force of gravity from a source of molten metal into a mould cavity where the metal is permitted to solidify within the cavity after which the metal feed is interrupted and the casting is removed from the cavity. The mould cavity is made by embedding an in situ destroyable pattern in particulate moulding material to form a mould cavity. The pattern may be destroyable in situ by the heat of the metal as it is fed into the mould cavity or by applying heat prior to feeding the metal into the cavity. The source of metal may be a reservoir located at a level below the level of the cavity with a pump to pump metal upwardly into the cavity through a riser tube. The metal to be cast may be supplied to the reservoir in molten state or in solid state and melted in the reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.