Method of die casting spheroidal graphite cast iron
US7134478B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 22, 2004 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Sep 29, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C1/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of die casting spheroidal graphite cast iron able to prevent formation of chill crystals to allow the crystallization of fine spheroidal graphite and simultaneously prevent the formation of internal defects, including the steps of preparing a die formed with a heat insulation layer at inside walls of a cavity, filling molten metal having a composition of the spheroidal graphite cast iron through a runner into the cavity, closing the runner so as to seal the cavity right before the molten metal in the cavity starts to solidify, and allowing the molten metal to solidify by the action of the inside pressure caused by crystallization of the spheroidal graphite in the sealed cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.