Filtering molten metal injector system and method
US6578620B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D35/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The filtering molten metal injector system includes a holder furnace, a casting mold supported above the holder furnace, and at least one molten metal injector supported from a bottom side of the casting mold. The holder furnace contains a supply of molten metal. The mold defines a mold cavity for receiving the molten metal from the holder furnace. The molten metal injector projects into the holder furnace. The molten metal injector includes a cylinder defining a piston cavity housing a reciprocating piston for pumping the molten metal upward from the holder furnace to the mold cavity. The cylinder and piston are at least partially submerged in the molten metal when the holder furnace contains the molten metal. The cylinder or the piston includes a molten metal intake for receiving the molten metal into the piston cavity when the holder furnace contains molten metal. A conduit connects the piston cavity to the mold cavity. A molten metal filter is located in the conduit for filtering the molten metal passing through the conduit during the reciprocating movement of the piston. The molten metal intake may be a valve connected to the cylinder, a gap formed between the piston and an op…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.