System and method of post-cure processing of composite core

Patent metadata

Field	Value
Publication number	US-9365022-B2
Application number	US-201313914756-A
Country	US
Kind code	B2
Filing date	Jun 11, 2013
Priority date	Jun 11, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method of joining a first bulk composite core and a second bulk composite core by applying an adhesive to a surface network of the first bulk composite core; inserting a plurality of mandrels into a plurality of cell members of the first bulk composite core and a plurality of cell members of the second composite core, thereby aligning the cell members of the first bulk composite core to the cell members of the second bulk composite core; pressing the respective surface networks of the first bulk composite core and the second bulk composite core together with the adhesive located therebetween; and curing the adhesive.

First claim

The invention claimed is:

1. A method of joining a first bulk composite core and a second bulk composite core, the method comprising the steps of:
applying an adhesive to a first surface network of the first bulk composite core, the first surface network being an exposed surface at a first termination end of a plurality of cell members of the first bulk composite core;
inserting a plurality of mandrels into the plurality of cell members of the first bulk composite core and a plurality of cell members of the second composite core, thereby aligning the cell members of the first bulk composite core to the cell members of the second bulk composite core, the second bulk composite core having a second surface network that is an exposed surface at a first termination end of a plurality of cell members of the second bulk composite core;
pressing together the first surface network of the first bulk composite core and the second surface network the second bulk composite core with the adhesive located therebetween; and
curing the adhesive.

2. The method according to claim 1 , the step of applying the adhesive to the first surface network of the first bulk composite core comprising reticulating a film adhesive onto the first surface network of the first bulk composite core.

3. The method according to claim 1 , the step of applying the adhesive to the first surface network of the first bulk composite core comprising pasting a paste adhesive onto the first surface network of the first bulk composite core.

4. The method according to claim 1 , wherein the first bulk composite member and second bulk composite member each have a substantially hexagonal outer geometry.

5. The method according to claim 1 , wherein each cell member has a hexagonal shaped geometry.

6. The method according to claim 1 , wherein each mandrel has a hexagonal shaped geometry.

7. The method according to claim 1 , further comprising the step of:
removing the plurality of mandrels.

8. A method of joining a first bulk composite core and a second bulk composite core, the method comprising the steps of:
applying an adhesive at a midportion of each of a plurality of mandrels, the midportion being between a first end and a second end of each mandrel;
inserting the plurality of mandrels into a plurality of cell members of the first bulk composite core and a plurality of cell members of the second composite core, thereby aligning the cell members of the first bulk composite core to the cell members of the second bulk composite core;
pressing the respective surface networks of the first bulk composite core and the second bulk composite core together; and
curing the adhesive.

9. The method according to claim 8 , wherein the step of curing the adhesive includes thermally expanding the plurality of mandrels.

10. The method according to claim 9 , wherein thermally expanding the plurality of mandrels applies pressure to the adhesive at an interior surface of the plurality of cell members of the first bulk composite core and an interior surface of the plurality of cell members of the second bulk composite core.

11. The method according to claim 8 , further comprising the step of:
removing the plurality of mandrels.

12. The method according to claim 8 , wherein the step of applying an adhesive to a midportion of each of a plurality of mandrels includes wrapping a film adhesive around an outer surface of each mandrel.

13. The method according to claim 8 , wherein the step of applying an adhesive to a midportion of each of a plurality of mandrels includes applying a paste adhesive around an outer surface of each mandrel.

14. A method processing a first bulk composite core and a second bulk composite core, the method comprising the steps of:
applying an adhesive to a first surface network of the first bulk composite core, the first surface network being an exposed surface at a first termination end of a plurality of cell members of the first bulk composite core;
inserting a plurality of mandrels into the plurality of cell members of the first bulk composite core and a plurality of cell members of the second bulk composite core, thereby aligning the cell members of the first bulk composite core to the cell members of the second bulk composite core, the second bulk composite core having a second surface network that is an exposed surface at a first termination end of a plurality of cell members of the second bulk composite core;
pressing together the first surface network of the first bulk composite core and the second surface network of the second bulk composite core together with the adhesive located therebetween;
curing the adhesive;
removing the plurality of mandrels; and
cutting through at least one of the first bulk composite core and the second bulk composite core so as to create a wafer therefrom.

15. The method according to claim 14 , further comprising:
stabilizing at least one of the first bulk composite core and the second bulk composite core with a fixture.

16. The method according to claim 15 , the step of stabilizing at least one of the first bulk composite core and the second bulk composite core with a fixture comprises:
supporting at least one of the first bulk composite core and the second bulk composite core with an outer fixture having an inner surface that lies adjacent to outwardly exposed cell walls of outwardly located tube members of at least one of the first bulk composite core and the second bulk composite core.

17. The method according to claim 14 , wherein the step of cutting through each of the tube members at least one of the first bulk composite core and the second bulk composite core so as to create a wafer therefrom includes cutting along a plane that is parallel to an exposed surface network of the either the first bulk composite core or the second bulk composite core.

Assignees

• Bell Helicopter Textron Inc

Inventors

• Kendrick Phillip A
• Woychesin S Brent

Classifications

• B29C65/483 Primary

  Reactive adhesives, e.g. chemically curing adhesives · CPC title

• B29C66/54

  Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title

• B29C66/721

  Fibre-reinforced materials (B29C66/729 takes precedence) · CPC title

• B29C66/81261

  Thermal properties, e.g. thermal conductivity, thermal expansion coefficient · CPC title