Method for the adaptive filling of rigid tool cavities

Patent metadata

Field	Value
Publication number	US-11235541-B2
Application number	US-201916725249-A
Country	US
Kind code	B2
Filing date	Dec 23, 2019
Priority date	Dec 30, 2018
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A method for the production of stiffened components made of fiber-reinforced composite material using two rigid form tools which are suitable for covering the longer end sides of T-shaped preformed reinforcing fibers, using a folded hose core and inflation of the hose core so as to exert pressure on the end side of the preformed reinforcing fibers.

First claim

The invention claimed is:

1. A method for production of stiffened component made of fiber-reinforced composite material, comprising the following steps:
providing a component that is to be reinforced,
laying down, on this component that is to be reinforced, reinforcing fibers that are preformed to form a T-shaped reinforcing element,
providing two rigid form tools which are suitable for covering longer end sides of the T-shaped preformed reinforcing fibers,
inserting a folded hose core into the rigid form tools,
positioning the rigid form tools on the longer end sides of the T-shaped preformed reinforcing fibers so that the folded hose core comes to rest above an end side of the preformed reinforcing fibers that is oriented away from the component that is to be reinforced,
pressing the rigid form tools against the preformed reinforcing fibers,
inflating the hose core so as to exert pressure on that end side of the preformed reinforcing fibers that is oriented away from the component that is to be reinforced,
consolidating the reinforcing fibers.

2. The method according to claim 1 , wherein a curable material is additionally introduced into the rigid form tools, between the folded hose core and the reinforcing fibers.

3. The method according to claim 2 , wherein the curable material, when cured, provides protection from electrolytic corrosion.

4. The method according claim 2 , wherein the curable material, when cured, has indicator properties.

5. The method according to claim 1 , wherein the folded hose core is made of a polymer film.

6. The method according to claim 5 , wherein the polymer film comprises polyamide.

7. The method according to claim 1 , wherein the folded hose core is made of silicone.

8. The method according to claim 1 , wherein the folded hose core has a non-stick coating.

9. The method according to claim 1 , wherein a release agent covers at least part of a surface of the folded hose core.

10. The method according to claim 1 , wherein the reinforcing fibers are dry carbon fibers.

11. The method according to claim 1 , wherein the reinforcing fibers are carbon fibers pre-impregnated with matrix resin.

12. The method according to claim 1 wherein the component comprises an aircraft component.

Assignees

• Airbus Operations Gmbh

Inventors

• Kako Jan-Christoph

Classifications

• B29L2031/003

  having a profiled transverse cross-section · CPC title

• B29K2105/0872

  Prepregs · CPC title

• B29D99/0014

  provided with ridges or ribs, e.g. joined ribs · CPC title

• B29L2031/3076

  Aircrafts (blades, propellers B29L2031/08) · CPC title

• B29C43/3642

  Bags, bleeder sheets or cauls for isostatic pressing · CPC title