1.The mold is closed, the piston is raised, the injection port is opened, and the molten metal is poured into the cylinder
2.After that, the plunger seals the entrance of the column and pushes the metal broth into the mold cavity, where the molten metal is kept under pressure until solidified
3.The mold opens. The casting remains on one side of the mold, and the remaining molten metal flows back through the nozzle and gooseneck.
4.The ejector pin ejects the casting from the ejector edge of the mold. When the plunger opens the injection port, the molten metal flows through the inlet to backfill the gooseneck.