| 摘要 |
PROBLEM TO BE SOLVED: To prevent a metal material from being misaligned with the axis of the fitting hole of a die when a hybrid shaft is molded. SOLUTION: This molding die 33 comprises the fitting hole 31 for fitting the cylindrical metal material 22 forming the outer peripheral part of the shaft part of the hybrid shaft, a cavity including the inner peripheral part of the metal material 22 fitted into the fitting hole 31 and forming the core part and the flange part of the shaft part, and a hydraulic pressure chamber 36 disposed around the fitting hole 31 and positioning the metal material 22 in the fitting hole 31 by pressing it in the radial direction. When a hydraulic pressure is applied to the hydraulic pressure chamber 36, a thin wall 37 is slightly moved to the fitting hole 31 side by the hydraulic pressure. Thus, the metal material 22 can be positioned and held in the fitting hole 31. COPYRIGHT: (C)2005,JPO&NCIPI |
