US 11,305,859 B2Granted

Method for forming a composite structure

AssigneeThe Boeing Company

InventorsWeidong Song, Gerard J. Gallo, Gwen Marie Lanphere Gross, Jamie J. Langabeer, Jason J. McBain, Stephen L. Metschan, Jeffrey H. Olberg, Max M. Osborne, Richard V. Phillips, Paul D. Evans, Hugh A. Yap, Nicholas J. Zayas

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Abstract

A method for forming a composite structure includes the steps of: forming a fiber-reinforced polymer paste to a shape of a cavity of a dry fiber preform structure; heating said dry fiber preform structure having said fiber-reinforced polymer in said cavity to an infusion temperature; infusing resin into said dry fiber preform structure and around said fiber-reinforced polymer; and curing said resin-infused fiber preform structure and said fiber-reinforced polymer at a cure temperature higher than said infusion temperature.

Claims20

Dependent claims

A method for forming a composite structure, comprising steps of:

providing a fiber-reinforced polymer paste to a cavity of a dry fiber preform structure, the fiber-reinforced polymer paste comprising resin and at least a first group of fibers dispersed within the resin;
heating the dry fiber preform structure having the fiber-reinforced polymer paste in the cavity to an infusion temperature;
and
infusing resin into the dry fiber preform structure that has been heated and around the fiber-reinforced polymer paste that has been heated but not into the fiber-reinforced polymer paste that has been heated.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/938,175Filed 28 Mar 2018
Published: US 2019/0300141 A13 Oct 2019
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B29C 70/865
Incorporated in coherent impregnated reinforcing layers, e.g. by winding: completely encapsulated
B29C 70/48
Using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs: and impregnating the reinforcements in the closed mould, e.g.…
B29C 70/542
Component parts, details or accessories; Auxiliary operations , e.g. feeding or storage of prepregs or SMC after impregnation or during ageing:…
B29C 70/86
By incorporating or moulding on preformed parts, e.g. inserts or layers , e.g. foam blocks: incorporated in coherent impregnated reinforcing…

Family

US 2019/0300141 A1Pre-grant publication · published 3 Oct 2019
US 11,305,859 B2This patent

From the US filing history. Foreign family members aren’t listed.

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