Pressure bag for tool core
US5425628A · kind A · utility
19Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Sep 20, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C70/342
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tool core is disclosed for forming an opening in a composite structure. The composite structure comprises a structural core with inner and outer skins formed on a mandrel, sealed in an impervious fabric bag and cured at elevated temperature and pressure in an enclosed chamber. The tool core is formed by a tool core inner member of simi-rigid material enclosed in an inflatable elastic bag. The interior of the tool core bag is exposed to the elevated pressure of the closed chamber and therefor inflates during the curing process to conform the tool core precisely to the opening in the structural core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.