Patent ID: 9346098
Filing Date: 2016-05-24
CPC Classification: B22C,B22D,B61F

Claim Text:
1. A method for manufacturing a bolster of a railway car truck, the method comprising the steps of: providing a mold that includes a drag portion and a cope portion, the drag portion and the cope portion being defined by a parting line that extends around an exterior surface of the mold, wherein in a main body section of the mold, the parting line that separates the drag portion from the cope portion is substantially centered between portions of the mold that define brake window openings and lightener window openings in sides of the bolster, the parting line extending substantially horizontally through each of the brake window openings and lightener window openings; wherein at outboard end sections of the mold, shoe pockets having at least one vertical section and at least one sloped section are defined in the mold and the parting line of both the drag portion and the cope portion is configured to pass above the shoe pockets so that the sloped sections of the shoe pockets in the outboard end sections are defined by the drag portion of the mold, below the parting line that extends around the exterior surface of the mold; inserting one or more cores into the mold; pouring a molten material into the mold to thereby cast the bolster; wherein the parting line of the mold is in the same location as a parting line of the one or more cores; and wherein the bolster includes sidewalls having a wall thickness that is substantially equal and constant on either side of the parting line.