New production system for vessels of composite materials using an adjustable mould

초록

Hull form of a typical planing boat can be easily modified into a set of developable surfaces with minor modification. Then, the surfaces are developed onto a plane to manufacture thin laminated FRP plates on a flat bed. The plates are bended in an adjustable mould system defined by line elements to form the hull form. In the procedure, ruling lines are used as line elements representing the hull. Battens made of circular pipes are attached along the line elements and their exact shapes and locations are maintained by wires and pin jigs. The plates are link together to complete the hull shape and additional laminas are stacked inside until necessary thickness is obtained. In order to verify the proposed method and to identify the possible flaws, a 1/3 scale model is constructed on the adjustable mould. The hull surface is divided into several pieces and developed onto a plane surface. At the fore body portion front of the 6th station, the hull shape varies rapidly in most cases and a full scale mock-up of the fore body part has been constructed using 3mm plywood to evaluate the construction techniques more carefully. It is found that the new production procedure can be successfully applied for the construction of planning vessels made of fiber reinforces plastics.