Insert-molded article, insert mold and insert molding method

摘要

The object of the invention is to disuse press fitting of a coil spring into a bearing made of a resin material, to prevent resin chips that may be produced during press fitting. In order to achieve this object, the coil spring is inserted in the cavity of a mold. The coil spring is partly exposed in the cavity. A molten resin material is injected into the cavity and solidified. The resin material and a portion of the coil spring which is exposed in the cavity are connected to and integrated with each other.