METHOD FOR MANUFACTURING AN ELONGATED STRUCTURAL ELEMENT MADE OF COMPOSITE MATERIAL BY MEANS OF FORMING AND CURING IN AN AUTOCLAVE USING A VACUUM BAG

摘要

The invention relates to a method for manufacturing a long structural component (20') made of composite material by means of forming and curing in an autoclave using a vacuum bag. A plurality of prepreg layers (21) are laminated in succession on a surface. The laminate (20) thus obtained is positioned on a convex male portion of the mould (40). A low-friction separator film (30) is arranged between the laminate and the mould. A vacuum bag (50) comprising a ventilation layer (52), having a substantially invariable set thickness, and a high- stretch vacuum bag film (53) which is substantially taut are prepared. The laminate on the mould (12) is subject to a temperature, vacuum and pressure cycle programmed to cause polymerization of the prepreg resin and also comprising a forming step able to cause adaptation of the form of the laminate (20) to the convex male portion (41) of the mould (40). The forming step immediately precedes polymerization of the prepreg resin.