Effect of Mold Material on Shrinkage of Investment Casting Wax Pattern

Various attempts have been made to substitute metal as the wax pattern mold material due manufacturing costs and time-consumption. This research investigates linear volume shrinkage on of gypsum, silicone rubber, epoxy resin alternative materials molds. A nylon master was by machining. The size set a reference for dimensional comparison with cast pattern. Wax molds were created using pattern, namely resin. Paraffin heated up 55˚C in metal, then poured into each mold. length, radius, inlet, outlet diameter measured profile projector, calculated. obtained through sample weighing. results show that rubber has lowest any contrast its shrinkage.