Sandwich-molded guide for transmission device

摘要

A guide (10) for a transmission device such as a chain (C) or belt, is injection molded using a sandwich-molding process. The process avoids the need for a complex mold and complex manufacturing steps. The guide (10) exhibits enhanced mechanical strength and excellent sliding contact properties and wear resistance in a compatible manner, and is also light in weight and has excellent durability. The sandwich-molded guide (10) comprises a slide rail (11) on which a chain (C) or belt slides, and a rail supporting member (12) integrally provided along with the slide rail (11). The slide rail (11) is composed of a material the principal component of which is a first polymeric material having wear resistance and heat resistance, and the rail supporting member (12) is composed of a material the principal component of which is a second polymeric material having higher strength than the material having the first polymeric material as its principal component. The slide rail (11) and the rail supporting member (12) are intimately joined to each other by injection molding using the sandwich molding process.