Patent ID: 8196762
Filing Date: 2012-06-12
Classification: B22C,B61G

Abstract:
1. A method for manufacturing a railcar coupler knuckle, said method comprising the steps of: providing a cope mold portion and a drag mold portion, the cope and drag mold portions having internal walls defining at least in part perimeter boundaries of a coupler knuckle mold cavity, wherein the mold cavity defines a finger section; positioning at least one internal core within either the cope mold portion or the drag mold portion, the at least one internal core configured to define a kidney cavity and a pivot pin cavity within a coupler knuckle; closing the cope and drag mold portions with the single core therebetween; and at least partially filling the mold cavity with a molten alloy, the molten alloy solidifying after filling to form the coupler knuckle, wherein the at least one core defines the kidney and pivot pin cavities, and the finger section of the mold cavity defines the entirety of a finger cavity of the coupler knuckle.