Patent ID: 8430774
Filing Date: 2013-04-30
Classification: F16H

Abstract:
1. A sandwich-molded part for a transmission device, the sandwich-molded part being molded by a sandwich molding method, the sandwich-molded part comprising: a slide rail on which a chain slides, the slide rail having a contact surface and guide portions extending away from the contact surface to define a travel path for the chain on the contact surface; and a rail support which is integrally provided along with the slide rail, wherein: the slide rail and the rail support are formed from a surface layer and a core layer; the core layer constituting the slide rail and the core layer constituting the rail support are integrally formed; the surface layer is formed from nylon 66 which including additives has a prescribed melt viscosity at 300° C. of 300 Pa·s or more and 2000 Pa·s or less at a shear rate of 1000 s the core layer has a bending strength higher than that of the surface layer; and the surface layer on the entire contact surface of the slide rail has a thickness of 1.0 mm or more.