Patent ID: 9193433
Filing Date: 2015-11-24
Classification: B29C,B29D,B29L,B64C,Y02T,Y10T

Abstract:
1. A method for producing a stiffened panel comprising a laminated skin extending in two directions, made of a resin and a continuous fiber reinforcement, a first stiffener and a second stiffener, the method comprising the steps of; drape forming the laminated skin from a continuous fiber reinforcement impregnated with a first thermoplastic resin having a first melting temperature Tf integrating in the drape forming on outer sides of the laminated skin and at predetermined locations for the stiffeners, films of a second thermoplastic resin, the second thermoplastic resin being at least partly miscible in the first thermoplastic resin and having a second melting temperature Tf compacting and consolidating the drape formed skin comprising the films of the second thermoplastic resin at the first melting temperature Tf making the stiffeners from the continuous fiber reinforcement impregnated with the first thermoplastic resin, each stiffener is in the form of a beam made of a resin with the continuous fiber reinforcement, assembling the skin and the stiffeners to provide an assembly, both in a compacted and consolidated state, by applying a contact pressure on the stiffeners placed on the skin at the predetermined locations and by raising a temperature of the assembly to the second melting temperature Tf