... :gear,rocker arm,support roller,roller boss,pinion,trunnion,bearing support,support frame,track roller,shell,hub,rudder,sternpost, ... system; Remove the pattern;Fill the mold cavity with molten metal;Allow the metal to cool;Break away the sand mold and remove the casting. ... a metal casting process characterized by using sand as the mold material.It is relatively cheaper and a sufficiently refractory ...