Although we have more than thirty years of experience in the minting process, in December of 2013 we bought out an entire casting business operation, which now enables us to supply medals at a greatly reduced price compared to the minted medals. We are fortunate to have the services of a foreman that has 15 years experience in spin casting. Our casting department was a natural progression for us to follow and has proven to be very successful.
Spin casting, also known as centrifugal rubber mould casting (CRMC), is a method of utilizing centrifugal force to produce castings from a rubber mould. Typically, a disc-shaped mould is spun along its central axis at a set speed. At Gold Reef City Mint we manufacture most of our medals, medallion products via this method.
Resin casting is a method of plastic casting where a mould is filled with a liquid synthetic resin, which then hardens. It is primarily used for small-scale production like industrial prototypes and dentistry. It can be done by amateur hobbyists with little initial investment, and is used in the production of collectible toys, models and figures, as well as small-scale jewellery production. At Gold Reef City Mint we manufacture most of our resin souvenirs products via this method.
Investment casting is a manufacturing process in which a wax pattern is coated with a refractory ceramic material. Once the ceramic material is hardened its internal geometry takes the shape of the casting. The wax is melted out and molten metal is poured into the cavity where the wax pattern was. At Gold Reef City Mint we manufacture our silver Big 5 figurines this method.