Most of the jewelry, including tungsten carbide rings, you own was probably cast. Lost-wax casting can be used for mass production as well as to make one-of-a-kind pieces.
For large-scale production, the first step of the casting process is to make an impression of a tungsten jewelry model in a rubber mold. Then, the rubber mold is repeatedly injected with molten wax, which hardens into exact copies of the tungsten ring item. Many wax copies are joined together and encased in a plaster-like substance called investment. The investment is heated until the wax melts and evaporates, leaving cavities shaped like the jewelry model.
Next, molten metal is injected into the cavities and allowed to cool. Finally, the investment is removed, revealing multiple tungsten carbide rings read for finishing.
The process is simpler for one-of-a-kind pieces. The first step is the creation of the wax carving. Then the piece is cast, assembled, and finished.
Lost-wax Casting Features and Benefits
Manufacturers usually cast large production runs, which makes the technique economical and relatively affordable.
Casting is a versatile process that can produce both simple and complex designs. Detail shows up well in cast jewelry.
Cast jewelry that isn’t formed in one piece is assembled from a combination of components produced by casting and other methods; one example is a ring with a cast shank and a die-struck head.
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