| 摘要 |
<p>A method of press moulding a moulding material to form a moulded part of fibre-reinforced resin matrix composite material, the method comprising the steps of: locating a moulding material in a mould tool, the moulding material containing fibres 4,22, resin and a syntactic layer 10 comprising a polymer matrix and a plurality of hollow bodies distributed within the polymer matrix; permitting the moulding material to drape at least partly under the action of gravity within the mould so as to configure at least part of the draped moulding material in a partly moulded shape; fully closing the mould tool to define a closed mould cavity containing the moulding material; applying pressure to the mould cavity to cause resin to flow and impregnate the fibres and to configure the moulding material in a fully moulded shape; and substantially fully curing the resin to form a moulded part from the moulding material. The moulding material may drape by bending about a neutral axis located within the syntactic layer. Preferably, the moulding material is heated to cause the viscosity of the resin to decrease; the drape may be enhanced by partially closing the mould tool. The method allows for an initial slow drape which avoids resin pinning and/or bridging fibres.</p> |
