Process for manufacturing precision hollow articles made of composite material

摘要

For the precision moulding of hollow bodies, of a layered composite material, the cores (10) are shaped for the required cavities (7) in the moulding (1), to be covered by at least one layer of reinforcement fibres impregnated with a resin (15,16) which polymerises under heat for the composite material. The cores (10), and the fibre wrappings, are placed in the mould (20) for compression by moving the mould walls (22,27) towards the cores (10). The compression shapes the inner (8) and outer (9) surfaces simultaneously with a sufficient resin flow during polymerisation. The cores (10), of elastomer silicon, have a thermal expansion to stretch the fibres during polymerisation.