Method of making fiber reinforced articles
US4648921A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1982 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49332
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved method is disclosed for forming articles, especially airfoils, comprised of a fiber reinforced plastic bonded to a metal object. In the manufacture of a propeller blade a subassembly is made by coating a metal spar with a certain class of adhesive to a depth of 5-40 mils to compensate for dimensional variations in the spar surface, transferably coating the interior of a subassembly mold with the adhesive, then inserting the coated spar into the mold and injecting a lightweight filler material. The adhesive and filler are then precured and the subassembly removed from the mold. A fibrous reinforcing material, such as glass fiber cloth, is then used to cover or wrap the subassembly, the subassembly thus covered is placed in a second mold and a synthetic polymeric material such as epoxy resin, previously or subsequently applied, is then cured. In the formation of other articles, the filler material might be entirely omitted, and the reinforcing fibers would be separated from a metal substrate only by the precured adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.