Patent ID: 8137491

Claim:
A process for manufacture of a reinforcing insert comprising: forming superposed fiber layers, joining together an assembly of said superposed layers by stitching without tying off or with tying off and pressing, by means of a joining fiber crossing through said layers so as to form fiber sections, at least some of said sections being rectilinear, impregnating the assembly thus obtained with a resin, polymerizing said resin to form a composite material part, removing said composite material part from a mold, wherein: the total fiber density making up the reinforcing insert is comprised of between 50% and 60% of a volume of the reinforcing insert, and fiber sections occupy between 3% and 10% of the volume of the reinforcing insert, and the impregnation operation is conducted so as not to compress said assembly thus obtained so that said sections remain rectilinear.