| 摘要 |
PROBLEM TO BE SOLVED: To fit a two-layered resin molded product so as to make an insert hard to slacken even if load acts repeatedly. SOLUTION: In a method inserting a metal cylindrical insert 3 in the attaching part bolt hole of a two-layered resin molded part formed by injection molding in such a state that the whole of the outer peripheral surface of a core layer 2 composed of a reinforcing fiber resin is coated with a soft skin layer 1, the insert 3 is inserted after or while the skin layer 11 formed to the inner peripheral surface of the attaching part bolt hole part of the two-layered resin molded part in which the insert is inserted is eliminated. |
