Railway truck castings and method and cores for making castings

Abstract From the Canadian patent

Improvements in cast metal sideframes and bolsters for railway trucks are disclosed along with improvements in the processes of casting such products and the cores used in the casting process. In one aspect, the cores are consolidated to provide two one-piece end cores a, one-piece center core, and a bottom center core for the sideframe and two one-piece end cores and a center core for the bolster. The consolidated cores may include cores to define various bolt holes. In another aspect, various cores may be made with step joints for interlocking support without weight-supporting chaplets. In another aspect a locator boss may be formed on, one or more of the cores for proper positioning of …