Method for making a molding core, and molding core for making a complex part made of a composite material
US9387604B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2008 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | May 2, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D99/0014
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In order to make a structure of a composite material including elongated hollow shapes, such as hollow shapes associated with stiffeners of a stiffened panel, the invention comprises making cores including a bladder made of an elastomer material. The invention relates to a method for making such extractable cores in order to obtain cores having a very important length, and allowing the use of said cores for the industrial production of composite parts. The bladder is a cylindrical bladder that is conformed in a core mould, wherein the core itself does not have to be cylindrical, before being filled with a granular material and submitted to a negative pressure in order to impart a stable shape to the core by compaction of the granular material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.