[2] An articulated arm is free to spin around a vertical axle, which is driven by an electric motor or a spring.
A small amount of metal in a crucible next to the mold is heated with a torch.
The high forces imposed on the metal overcome the viscosity, resulting in a finely detailed workpiece.
For casting of small parts using hot metal, a disk shaped mold is contained within a rotating drum, and molten metal is poured into the center.
All that is required is an arm which rotates with an adequate amount of centrifugal force, a container on the end of said arm to hold both a mold and the material to be cast into the mold.