| 摘要 |
PURPOSE:To obtain a light and cheap composite material bomb which is easy to wind and finishes well, having favorable physical properties, by coating an outer periphery of a plastic inner cylinder with a sheet of reinforced fibers, and then forming thereon a fiber-reinforced plastic layer through the filament winding method. CONSTITUTION:An inner cylinder made of plastic in small thickness is used for an inner cylinder of a composite material bomb, which is preferably formed by the blow-molding method. According to the blow molding, after one end of a plastic pipe is sealed, the pipe is heated and expanded into an aimed shape mechanically or by adding pressure. The product formed by the blow molding is high in strength, but low in hardness. Therefore, in order to reinforce a mandrel in a circumferential direction, at least the drum portion of the mandrel which is the inner cylinder is wound by a reinforced fiber sheet. The material of the reinforced fiber sheet is glass fibers, carbon fibers, aramid fibers, etc. Over the reinforced fiber sheet, there is formed fiber-reinforced plastic layer by hardening a mold of the reinforced fibers and plastic by the filament winding method. |
