KNUCKLE FORMED FROM PIVOT PIN AND KIDNEY CORE AND ISOLATED FINGER CORE

摘要

A method for manufacturing a railcar coupler knuckle (16) includes providingcope and drag mold portions (210,250) having internal walls defining at least in part perimeter boundaries of aknuckle mold cavity; positioning a first internal corewithin either the cope mold (210) or the drag mold (250) portions, the firstinternal core configured to define a kidney cavity (12)and a pivot pin hub (10) as a single void within the knuckle; positioning asecond internal core within either the cope mold portion(210) and the drag mold portion (250), the second internal core configured todefine a finger cavity (14); closing the cope anddrag mold portions (210, 250) with the two internal cores therebetween; and atleast partially filling the mold cavity with a moltenalloy, the molten alloy solidifying after filling to form the knuckle, whereinthe first internal core defines the kidney cavity (12)and the pivot pin hub (10) of the coupler knuckle, and wherein the secondinternal core defines the finger cavity (14) of theknuckle.