1: powered by compressed gas (may be inert gas or air).
2: The molten metal flows from the closed container to the bottom and up along the riser tube, full
3: Under the action of pressure, the molten metal cools, crystallizes and solidifies from top to bottom.
Continuous metal liquid replenishment during solidification.
4: The whole process is controllable (including pressure, time, speed, temperature).
Low pressure aluminum casting machine processing: