Self supporting core-in-a-core for casting
US8196640B1 · kind B1 · utility
21Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2011 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Jul 1, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A core-in-a-core casting method and hybrid core (40) for use in the method. An inner core (42) formed of process-inert particles disposed in a binder material is used as a mold for casting an outer core ((44) formed of particles that will sinter during a subsequent firing step. The inner core provides mechanical support for the outer core during the firing step, and during which the inner core devolves into compacted but unbonded particles that can be removed conveniently from the outer core following the firing step to reveal the fired hollow outer core (44).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.