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Lost-wax casting – also called investment casting, precision casting, or cire perdue (French: [siʁ pɛʁdy]; borrowed from French) [1] – is the process by which a duplicate sculpture (often a metal, such as silver, gold, brass, or bronze) is cast from an original sculpture. Intricate works can be achieved by this method.
Much of the wax used in investment casting can be reclaimed and reused. [2] Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process. Investment casting is so named because the process invests (surrounds) the pattern with refractory material to make a mould, and a molten substance is cast into the ...
Lost-foam casting is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax. This process takes advantage of the low boiling point of foam to simplify the investment casting process by removing the need to melt the wax out of the mold.
The earliest known record of lost-wax casting is a clay tablet written in cuneiform in the ancient city of Sparta, Babylon, which specifically records how much wax is needed to cast a key. [6] The earliest-known castings in the global archaeological record were made in open stone molds. [ 7 ]
Centrifugal casting (industrial) Continuous casting; Die casting; Evaporative-pattern casting. Full-mold casting; Lost-foam casting; Investment casting (Lost-wax casting) Countergravity casting [1] Lost-foam casting; Low pressure die casting; Permanent mold casting; Plastic mold casting; Resin casting; Sand casting; Shell molding; Slush casting ...
There are a wide variety of wax types used in the lost wax casting process. Generally they fall into three main types, soft, hard and injection waxes. Injection waxes are made and intended to be used for injecting wax under pressure into rubber or other types of molds.
Lost-foam casting (LFC) is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax. This process takes advantage of the low boiling point of polymer foams to simplify the investment casting process by removing the need to melt the wax out of the mold.
The lost-wax casting technique Robinson developed is a modified version of the bronze casting technique. It involves creating a plaster mould which is filled with molten wax. The mould is then removed (and can be reused) and the wax is encased in a heat-resistant covering and placed in the kiln.
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