A gold casting process is explained here:
The casting metal is melted in a special casting machine that is programmed to insert the metal under vacuum into the flask at the right time, temperature and rate.
About furnace melting and filling the mold with molten gold, does gold enter the mold under pressure or without any pressure?
The metal is under vacuum. So, does it definitely mean the metal is under pressure? I'm a bit confused with pressure, tension, compression,...
The process is illustrated by the following figures. A mold is created out of a wax tree. Molten gold will fill the mold.