| 摘要 |
PROBLEM TO BE SOLVED: To improve moldability and to prevent a step from being generated by a joint on the surface by integrally molding a surface material laminated with a decorative material and a resin reinforcing layer, a resin core material and a mandrel. SOLUTION: A preliminarily molded decorative material 5 is arranged in a die, a resin is filled between the decorative material 5 and the die to form a resin reinforcing layer 6, and a surface material 4 is obtained. Dies with different inner face shapes are used for the surface material 4 for the surface side and the surface material 4 for the back side respectively. The surface material 4 for the surface side and the surface material 4 for the back side are arranged in the cavity of a die, and a mandrel 2 is arranged near the center of the cavity. A foaming urethane resin is filled between the resin reinforcing layer 6 of the surface materials 4 and the mandrel 2 to form a resin core material 3. A molded body integrated with the surface materials 4 and the resin mandrel 2 is obtained, the molded body is taken out of the die, and the joint of the surface materials 4, 4 is finished to obtain a steering wheel 1. |
