Mould for casting components
US5234047A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Sep 8, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/045
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ceramic shell mould (70) for casting a single crystal turbine blade comprises a plurality of article portions, (72), each of which has an article chamber (74) for defining the shape of a turbine blade, a plurality of selector portions (76), a plurality of starter portions (80) and a runner portion (84). The runner portion (84) comprises a first subsection (86) which has a central axis (87) arranged parallel to, and spaced from, the central axes (73) of the article portions (72) and a plurality of second subsections (90) which interconnect the first subsection (86) with the article portions (72). The second subsections (90) are arranged to make an acute angle with the first subsection (86) of the runner portion (84) and with the starter portions (80) so that the second subsections (90) may bend to allow relative movement between the first subsection (86) and the starter portions (80) to prevent the cast turbine blades falling off the mould. The second subsections (90) also have a small cross-sectional area to increase the amount of bending possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.