CORE FOR CAM SHAFT AND METHOD FOR CASTING HOLLOW CAM SHAFT

摘要

PURPOSE: To cast a hollow cam shaft which has high torsional rigidity and is difficult to be bent the shaft hole. ;CONSTITUTION: Many short length metal pipes 3 are concentrically fitted to the outside of the shaft core part 2a of a core 1 for cam shaft. The core 1 for cam shaft is formed of a solid sand core mold and the short length metal pipe 3 is formed from a steel pipe. The short length metal pipes 3 are held with the shaft core part 2a, journal core parts 2b and cam core parts 2c, and concentrically arranged with the shaft part of the hollow cam shaft by restraining the bending of the short length metal pipe 3 developed at the time of casting cast iron.;COPYRIGHT: (C)1995,JPO