PRODUCTION OF CAM SHAFT FOR INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To manufacture a lightweight cam shaft which possesses substantial strength and wear resistance by using fiber-reinforced Al or its alloy material and forming the cam shaft by casting of a molten metal. CONSTITUTION:Many ceramic fibers 4 are preliminarily put in the cavity 2 of a metallic mold 1 and thereafter molten aluminum 5 is charged through a feed port 1a into the cavity 2. A punch 3 is then fitted into the port 1a and is pressed to exert pressure on the inside of the cavity 2. The molten aluminum 5 begins to solidify when pressed and if the mold 1 is opened after the solidification, a lightweight cam shaft of the fiber-reinforced aluminum or its alloy having high strength and wear resistance is manufactured.