Militaria Collecting (Australian Army insignia) uniform embellishments and badges
Here is a discussion of some badge manufacturing technical information of general interest to users of our publications.
Centrifugal Casting Techniques
This casting technique involves using upper and lower moulds which are pressed together (sandwiched) to form a cohesive platter, before being placed in a centrifuge and spun at high speed. At that point, a low melting temperature metal alloy is poured into a central aperture in the top mould. The spin casting process then uses centrifugal force to distribute the molten alloy through a network of tubes in the mold platter, forcing the metal out into to detailed casting galleries on the peripheral edge of the spinning platter.
In this way, multiple badges are cast simultaneously. The number of badges yielded from each casting process, is dependent upon the size of the individual badge being made and the size of the platters which the spin casting machine can handle.