Multi-state bladder for manufacture of composite material

Patent metadata

Field	Value
Publication number	US-9827720-B2
Application number	US-201514822237-A
Country	US
Kind code	B2
Filing date	Aug 10, 2015
Priority date	Aug 10, 2015
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

Within examples, methods and systems for a multi-state bladder or elastomeric apparatus for manufacture of composite material are provided. In one example, the elastomeric apparatus comprises an elastomer housing, and magnetic components within the elastomer housing such that application of a magnetic field to the elastomer apparatus changes a rigidity state of the elastomer housing to a secondary state. The secondary state is supportive of a surface compaction applied to the elastomer housing. The elastomeric apparatus may also include rods within the housing extending along the housing, and the magnetic components are mounted to the rods in a rotatable manner. The magnetic components can react to a magnetic field in a way that aligns the magnetic components by rotating on the rods to cause the housing to have a rigid surface state, and to cause the housing to have a flexible surface state in absence of the magnetic field.

First claim

What is claimed is:

1. An elastomeric apparatus for use in manufacture of a composite component, comprising:
an elastomer housing; and
a plurality of magnetic components within the elastomer housing in a predetermined manner such that application of a magnetic field to the elastomer apparatus changes a rigidity state of the elastomer housing to a secondary state, wherein the secondary state is supportive of a surface compaction applied to the elastomer housing.

2. The elastomeric apparatus of claim 1 , wherein the elastomer apparatus has a first state in which the elastomer housing is flexible in an absence of the magnetic field, and the secondary state in which the elastomer housing is rigid in a presence of the magnetic field.

3. The elastomeric apparatus of claim 2 , further comprising:
a plurality of rods within the elastomer housing extending along a width of the housing,
wherein respective magnetic components are mounted to respective rods of the plurality of rods in a rotatable manner, and
wherein the magnetic components react to the magnetic field in a way that aligns the magnetic components by rotating on the plurality of rods to cause the elastomer housing to have the secondary state, and wherein the magnetic components cause the elastomer housing to have the first state in absence of the magnetic field.

4. The elastomeric apparatus of claim 1 , wherein during application of the magnetic field to the elastomer apparatus, the plurality of magnetic components align within the elastomer housing to provide an internal rigid structure for the elastomer housing.

5. An elastomeric apparatus for use in manufacture of a composite component, comprising:
a housing having a flexible surface state and a rigid surface state;
one or more rods within the housing extending along the housing; and
a plurality of magnetic components mounted to the one or more rods in a rotatable manner, wherein the plurality of magnetic components react to a magnetic field in a way that aligns the magnetic components by rotating on the one or more rods to cause the housing to have the rigid surface state, and wherein the plurality of magnetic components cause the housing to have the flexible surface state in absence of the magnetic field.

6. The elastomeric apparatus of claim 5 ,
wherein the one or more rods include a center spine rod extending along a length of the housing, and the plurality of magnetic components are each mounted to the center spine rod spaced apart along the length of the housing.

7. The elastomeric apparatus of claim 5 ,
wherein the one or more rods include a plurality of rods within the housing extending along a width of the housing, and
respective components of the plurality of magnetic components are mounted to respective rods of the plurality of rods in the rotatable manner.

8. The elastomeric apparatus of claim 7 , wherein the plurality of magnetic components include an upper arm coupled to a lower arm via a rotational bearing, and
wherein the respective rods of the plurality of rods are positioned through respective rotational bearings of the plurality of magnetic components.

9. The elastomeric apparatus of claim 5 , wherein the plurality of magnetic components include an upper arm coupled to a lower arm, and
wherein the upper arm comprises a magnetically sensitive material, and
wherein the lower arm comprises a non-magnetically sensitive material.

10. The elastomeric apparatus of claim 5 , wherein the plurality of magnetic components cause the housing to have the rigid surface state by aligning vertically along a length of the housing through an upward rotation so as to contact a top and a bottom of the flexible housing.

11. The elastomeric apparatus of claim 5 , wherein the plurality of magnetic components cause the housing to have the rigid surface state by aligning along a length of the housing to be substantially perpendicular to the one or more rods.

12. The elastomeric apparatus of claim 5 , wherein the one or more rods include a plurality of rods, and the plurality of magnetic components are mounted on the plurality of rods that are spaced apart from each other along a length of the housing such that the plurality of magnetic components lay substantially horizontal or non-vertical along the length of the housing in the absence of the magnetic field.

13. The elastomeric apparatus of claim 5 , further comprising a plurality of springs coupled to the one or more rods to cause the plurality of magnetic components to rotate to be substantially horizontal or non-vertical along a length of the housing in the absence of the magnetic field.

14. The elastomeric apparatus of claim 13 , further comprising a plurality of rotation stops coupled to the one or more rods, such that in the absence of the magnetic field, the plurality of springs cause the plurality of magnetic components to rotate until contact with the plurality of rotation stops.

15. The elastomeric apparatus of claim 5 , further comprising a plurality of links coupling the plurality or rods along a length of the housing.

16. A method for altering a surface rigidity of an elastomeric apparatus, comprising:
providing a housing of the elastomeric apparatus having a first surface state and a second surface state;
changing a surface rigidity state of the housing during localized exposure to a magnetic field, such that the housing has the first surface state; and
changing the surface rigidity state of the housing in absence of the magnetic field, such that the housing has the second surface state.

17. The method of claim 16 , wherein the first surface state is a rigid surface state, and the second surface state is a flexible surface state.

18. The method of claim 16 , wherein the first surface state is a flexible surface state, and the second surface state is a rigid surface state.

19. The method of claim 16 , further comprising:
applying the magnetic field during automated lamination so as to cause the elastomeric apparatus to react to a force of a lamination application device; and
after the completion of automated lamination, causing the surface rigidity state of the housing to return to the flexible surface state.

20. The method of claim 16 , further comprising:
placing the elastomeric apparatus into an internal cavity of a mandrel;
applying the magnetic field to the elastomeric apparatus to cause the surface rigidity state of the housing to be a rigid surface state;
applying a composite material on the mandrel; and
removing the magnetic field from the elastomeric apparatus to cause the surface rigidity state of the housing to be a flexible surface state.

Assignees

• Boeing Co

Inventors

• Heath Edward
• Modin Andrew Elmer
• Shaw Paul D
• Suriyaarachchi Raviendra

Classifications

• B29C70/342 Primary

  using isostatic pressure · CPC title

• B29C70/446

  Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames · CPC title

• B29K2995/0008

  Magnetic or paramagnetic · CPC title

• B29C70/54

  Component parts, details or accessories; Auxiliary operations {, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing} · CPC title

• B29C33/505

  cores or mandrels, e.g. inflatable (B29C33/0016 takes precedence; for winding and joining B29C53/824; for supporting articles during joining B29C66/634; flexible cores for vulcanizing tyres B29D30/0654) · CPC title