What is precision investment casting? Precision investment casting, also known as precision casting, is a lost wax casting process used to make parts from ferrous and non-ferrous metals. "Lost Wax Casting" means that the metal part is made from a wax mold.The precision investment casting process begins when you design and manufacture a wax injection mold ㅡ, which is used to create a wax pattern with the same geometry as the desired...