Method of making a hollow article
US4126659A · kind A · utility
67Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1976 |
| Grant date | Nov 21, 1978 |
| Priority date | — |
| Expiry date | Jul 9, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/014
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method and apparatus for making hollow, resin-impregnated fibrous fabric articles. Specifically, it relates to a method wherein a reusable mandrel is made sufficiently rigid to receive a lay-up of the article to be manufactured. The rigidized assembly is placed within a female mold, derigidized and expanded to apply pressure from within, thereby forcing the lay-up against the interior of the mold. Heat is applied to cure the resin, producing an article having a very high degree of dimensional accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.