Process for manufacturing diecast parts
US6024158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1996 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/2007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Parts are diecast from a light metal alloy which in the molten state is fed under gravity into a casting chamber of a diecasting machine and whence forced by a plunger into a mould chamber which undergoes controlled evacuation in accordance with the position of a plunger. A parting compound is applied to at least one mold half and the application of a lubricant to the plunger. The light metal alloy consists of a primary alloy of invariable composition, with a limit placed on the proportions of Cu, Fe and Zn; the alloy undergoes smelting treatment, de-gassing and/or filtration before being introduced. The vacuum in the mould chamber is below 50 mbar when the molten alloy is introduced and the parting compound contains alkali halides and anti-corrosion additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.