| 摘要 |
<p>A mandrel (50) for use in winding a filament-reinforced plastic artefact comprises a portion (66) of relatively low density cellular material such as foamed polyurethane about a stiff axial spine member (54). After winding the mandrel may be removed by comminution. An alternative mandrel comprises a number of sections of the cellular material, and enables an artefact having a re-entrant surface to be wound. A layer of resin-impregnated filaments is wound around the mandrel, and the layer is partially cured. A section of the mandrel is then removed by comminution, and the layer is deformed to the shape of the remainder of the mandrel. <IMAGE></p> |
