Method for manufacturing preforms from fibre reinforced composite materials and preform obtained thereby

摘要

Fiber preform manufacture, involves stacking layers of resin film between fiber layers and forming to a shape suitable for inclusion in a molding tool. A preform lay-up (4) is created on a working surface by stacking alternate layers of dry fiber (21-25) and resin (41-45). A shaped handleable preform is then created by forming the different areas (A,B,C,D) as required and hardening. The shape of the resin layers enables facing sides of external fiber layers to be joined together as well as the internal fiber layers. Resin layers have local cut outs which reduce shear stresses between fiber layers during preforming. An Independent claim is made for a preform produced by the claimed process.