Investment casting utilizing patterns produced by stereolithography
US4844144A · kind A · utility
139Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Aug 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of investment casting utilizes a pattern produced by stereolithography in which a three-dimensional specimen is provided by light cure of ethylenically unsaturated liquid material. The stereolithography composition is constituted by the ethylenically unsaturated liquid material in admixture with an inert low thermoplastic material which weakens the pattern when heated within the mold used in the investment casting process to prevent the thermal expansion of the pattern from cracking the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.