Patent ID: 8627875

Claim:
A method for casting a freight car yoke using a core mold assembly unit, the method comprising: providing a core mold assembly unit formed from phenolic urethane treated molding sand, the core mold assembly unit including a core mold upper half and a core mold lower half mated at a common split line defining a mold, at least one riser vent in the core mold upper half, at least one filling gate in the core mold upper half, at least one mold cavity which replicates the exterior features of a cast freight car yoke, and at least one core located inside the mold cavity that replicates the interior features of a cast freight car yoke, and first and second lifting grooves positioned on opposing bottom edges of the core mold lower half; and pouring molten metal through the filling gate and into the core mold assembly unit through the core mold assembly unit filling gate, thereby filling the core mold assembly unit cavity to cast at least one freight car yoke.