Melt supply pipe for aluminum die casting
US8580187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2007 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Mar 17, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D35/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided a melt supply pipe comprising a melt supply pipe body composed of an inner ceramic pipe and an outer steel pipe, the outer steel pipe having a Ni alloy layer formed over the inner circumferential surface, and TiC particles attached to the surface of the Ni alloy layer, wherein grooves are formed at both ends of the melt supply pipe body, each groove forming an annular space overlapping the boundary between the outer circumferential surface of the inner ceramic pipe and the inner circumferential surface of the outer steel pipe, and a fibrous sheet of an inorganic material is inserted into each of the annular grooves such that the sheet extends over the entire circumference of the groove. The melt supply pipe is strong to mechanical impact owing to the use of the steel pipe in combination with the ceramic pipe and can prevent intrusion of an aluminum melt despite the difference in thermal expansion between the steel pipe and the ceramic pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.