Method for manufacturing by molding elongate and hollow workpieces made from composite material, molding device for implementing the method and workpieces obtained
US12305704B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2021 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Feb 6, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method includes producing an initial preform on a mandrel by filament winding without generating shrinking, cutting the initial preform to the correct length, placing the assembly provided beforehand with internal drainage device and pressurization device into a female mold, and bringing the preform assembly to a softening temperature and pressurizing the assembly at both ends until it is deformed by a diametrical increase in its dimensions. The method further includes bringing the impregnation resin to polymerization temperature and pressure in order to allow the workpiece to consolidate, its external shape becoming consistent with the internal shape of the mold, opening the mold and removing the workpiece from the mold, and machining the final shapes of the composite workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.