Customized Zinc Die Casting Suppliers. Zinc die casting process is fast-cycling hot chamber die casting process. it utilizes a component called a gooseneck that is submerged in a furnace filled with molten metal. Metal automatically enters the shot chamber through a hole in the gooseneck. A vertical plunger then seals the hole and drives the metal into the back of the die with high pressure. There are one or more cavities, each an exact inverse replica of the parts, the quick chill and rapid solidification take place when the molten metal comes into contact with relatively cool steel. The part is ejected from the tool.