Method of manufacturing rein infused core structure

Details Method of manufacturing rein infused core structure Method of manufacturing rein infused core structure

1998-05-21

2002-12-17

Stakovici, Stefan (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

C264S102000, C264S511000, C264S248000

Reexamination Certificate

active

06495088

ABSTRACT:

BACKGROUND OF THE INVENTION
The fabrication of composite structures from fiber reinforcement layers utilizing a resin infusion and curing technique in connection therewith is already known in the art. The use of such a process for fabrication of structures having multilayer cores sandwiched between fiber-reinforced skins, is usually labor intensive for a variety reasons, most notably due to adhesive bonding and plural infusion operations.
SUMMARY OF THE INVENTION
In accordance with the present invention, a porous core is fabricated by compacting and heating a thermoplastic coated microballoon type of material. Layers of such cores are then assembled with layers of reinforcing material, such as fiberglass cloth to form a dry multi-layer sandwich layup. The layup is then bonded by reacting while receiving resin by infusion through the porous cores.


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