Preform manufacturing process for producing a part made from composite material

A multi-directional texture intended to constitute a porous preform for producing a part made from composite material is manufactured by winding a filament onto a support structure lined with projections, the filament, before winding, being pre-impregnated by means of a binding agent capable of being removed, after winding the filament, virtually without leaving a solid residue. The binding agent is a resin which can be removed by heat, having a virtually zero char (coke) content, for example an acrylic resin, or alternatively an adhesive which can be removed by solvent, and it enables the filament to be held in place during the winding operation. UNE TEXTURE MULTIDIRECTIONNELLE DESTINEE A CONSTITUER UNE PREFORME POREUSE POUR LA REALISATION D'UNE PIECE EN MATERIAU COMPOSITE EST FABRIQUEE PAR BOBINAGE D'UN FIL SUR UNE STRUCTURE DE SUPPORT GARNIE DE PICOTS, LE FIL ETANT, AVANT LE BOBINAGE, PRE-IMPREGNE AU MOYEN D'UN AGENT DE LIAISON SUSCEPTIBLE D'ETRE ELIMINE, APRES BOBINAGE DU FIL, SANS PRATIQUEMENT LAISSER DE RESIDU SOLIDE. L'AGENT DE LIAISON EST UNE RESINE THERMO-ELIMINABLE AYANT UN TAUX DE COKE PRATIQUEMENT NUL, PAR EXEMPLE UNE RESINE ACRYLIQUE, OU BIEN UN ADHESIF ELIMINABLE PAR SOLVANT, ET IL PERMET DE MAINTENIR LE FIL EN PLACE PENDANT L'OPERATION DE BOBINAGE.