| 摘要 |
1,228,996. Moulding rotor blades. ROLLSROYCE Ltd. 20 June, 1969 [10 May, 1968], No. 22298/68. Heading B5A. [Also in Divisions B8 and F1] An aerofoil-shaped blade, e.g. a compressor rotor blade for a gas turbine engine, is made by positioning a pair of laminar members 20, 21 between the walls 15, 16 of a mould, introducing resin-impregnated fibrous material and optionally a core 23 into the space 22 between the laminar members and forming the members and fibres into the blade. The walls of the mould are shaped to receive members such as 30, 31 which form platforms or dovetails on the blades. The laminar members may be formed from metal but are preferably of resin, e.g. epoxy resin reinforced with cross-woven fibres of, for example, metal-coated fibre or carbon fibre. The core member 23 may be of honeycomb or foamed material and may remain in the mould or may be made of wax and be melted out after forming. A plurality of pairs of the laminar members may be mounted on a common rotary member (34) with the ends of the pairs aligned and fibrous material may be wound into the aligned gaps and cut to length after moulding. |
