Densification of fibrous structures by resin transfer moulding for making thick parts of composite material
US7727448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Dec 16, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C70/443
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fiber structure for forming the reinforcement of a part to be made is placed in a mold (22) having at least one wall formed by a flexible membrane, and then a resin composition is injected into the mold, the composition having a volatile material content of less than 25% by weight and being at a temperature of a value such that its viscosity lies in the range 0.1 Pa·s to 0.3 Pa·s. The resin is polymerized in the mold placed in an enclosure (20) with temperature being raised progressively and with polymerization including at least a final stage of polymerization under pressure in order to obtain a composite material part presenting residual porosity of less than 11% by volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.