Note on EPC: EPC (also known as full mold casting) is a new casting method that combines paraffin wax or foam models similar to the size and shape of the casting into model clusters, applies refractory coating and dries them, buries them in dry quartz sand for vibration molding, pours them under negative pressure, vaporizes the model, occupies the position of the model with liquid metal, and forms castings after solidification and cooling.