Sandwich panels and method for producing sandwich panels

Patent metadata

Field	Value
Publication number	US-9682529-B2
Application number	US-201414555617-A
Country	US
Kind code	B2
Filing date	Nov 27, 2014
Priority date	Nov 27, 2013
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A sandwich panel with at least one insert for forming a local reinforcement, which insert is smaller than a distance between the cover layers of the sandwich panel. A difference between the distance between the cover layers and a length of an extension of the insert including a previously viscous expansion compound with adhesive properties, which expansion compound has solidified during the pressing of the sandwich panel, is compensated for. A sandwich panel with at least one previously elastic insert whose original extension as a result of deformation during pressing of the sandwich panel is reduced. A method for producing such sandwich panels.

First claim

The invention claimed is:

1. A sandwich panel comprising:
a core structure and
cover layers arranged on each side of the core structure, and spaced apart from each other by a distance,
the core structure comprising:
a multitude of cells, and
at least one insert arranged to form a local reinforcement,
the at least one insert being arranged between the cover layers,

wherein said insert is smaller than a cover layer distance between the cover layers, and a difference between its extension and the cover layer distance of
at least one cured expansion compound is compensated for with adhesive characteristics;
wherein the at least one insert comprises two sections, filling a distance between a length of the insert and the distance between the cover layers, wherein one section is cured at a time of installation of the sandwich panel, and another section is viscous during installation of the sandwich panel.

2. The sandwich panel according to claim 1 , wherein the expansion compound is arranged at least between the insert and at least one cover layer.

3. The sandwich panel according to claim 1 , wherein the at least one insert comprises a multi-component design, and the expansion compound is arranged at least between components of the insert.

4. The sandwich panel according to claim 3 , wherein components of the at least one insert cooperate with each other with a positive-locking fit.

5. The sandwich panel according to claim 1 , wherein fibers are arranged in the expansion compound.

6. The sandwich panel according to claim 1 , wherein the at least one insert is structured in a region of the expansion compound.

7. The sandwich panel according to claim 1 , wherein the at least one insert is at least in some sections circumferentially bonded to the core structure.

8. The sandwich panel according to claim 7 , wherein the at least one insert has a body portion comprising a reduction in its cross section when compared to body portions on a side of the cover layers.

9. The sandwich panel according to claim 1 , wherein the cells are honeycomb shaped.

10. The sandwich panel according to claim 1 , wherein the insert is configured to form a force transmission point.

11. A sandwich panel with a core structure and cover layers arranged on each side of the core structure and being spaced apart from one another by a distance, wherein the core structure comprises a multitude of cells and with at least one insert for forming a local reinforcement wherein the at least one insert is arranged between the cover layers, wherein the at least one insert comprises two sections, filling a distance between a length of the at least one insert and the distance between the cover layers, wherein one section is cured at a time of installation of the sandwich panel, and another section is viscous during installation of the sandwich panel and which is cured and deformed in a forming of the sandwich panel.

12. The sandwich panel according to claim 11 , wherein the cells are honeycomb-shaped.

13. The sandwich panel according to claim 11 , wherein the insert is configured to form a force transmission point.

Assignees

• Airbus Operations Gmbh

Inventors

• Schoke Berend
• Kluesener Jens
• Doecker Michael
• Buck Werner

Classifications

• B32B2605/18

  Aircraft · CPC title

• B32B29/002

  as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10) · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B29L2031/608

  Honeycomb structures · CPC title

• B32B3/12 Primary

  characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure · CPC title