Abstract: The propeller is one of the most important components of the ship and its material requirements are extremely high. Composite material has become the first choice for propeller material due to its high strength, small specific gravity, corrosion resistance and low underwater noise. In addition, as a key procedure in the composite propeller forming process, mold design process also has high requirements. This paper mainly analyzes the research background of current composite propellers on the basis of the existing mold design,and sums up the inadequacies. And then, according to the molding principle of molding process, an integrated molded composite propeller mold was studied and designed. By introducing five main modules consisting of the analysis of the overall structure of the propeller, the comparative analysis of the existing mold structure, the overall design of the mold and the cavity design, the manufacture and molding of the propeller mold, and the analysis of the precision, and by combining with relevant calculations, the design result of the integral molding die was obtained. The technical problems of assembly deviation and low bonding strength had been effectively solved.

Key words: composite material, propeller, holistic molding, die pressure