Patent ID: 9132589
Filing Date: 2015-09-15
Classification: B29C,B29D,B29L

Abstract:
1. A method for producing a curved profile from a rectilinear preform of preimpregnated fiber webs, said method comprising: stacking N fiber webs on a deformable mandrel to obtain a preform having a cross-section including at least one first part and at least one second part oriented perpendicular relative to each other, and winding said deformable mandrel and the stacked N fiber webs that form said preform on a bending tool along an axis of rotation (X) to bend said preform to have said curved profile, said at least one first part being positioned in a plane perpendicular to the axis of rotation (X) and said at least one second part being positioned parallel to the axis (X) whereof a face portion of said at least one second part is enabled to be in contact with the bending tool, said winding including: pre-heating each section of the preform in its entirety prior to a leading portion of the preform being introduced with said deformable mandrel onto the bending tool, while said pre-heating is being performed, generating, just prior to the leading portion of the preform and the deformable mandrel being introduced onto the bending tool, a heat gradient between said leading portion of the preform and the rest of the preform such that the rest of the preform is hotter than said leading portion of the preform, bending, in a single operation, the N fiber webs while they are disposed between the deformable mandrel and the bending tool to provide said curved profile of said N bent fiber webs, and polymerizing said curved profile of said N bent fiber webs.