lost-wax process


lost-wax process
/lawst"waks", lost"-/, Metall.
a process of investment casting in which a refractory mold is built up around a pattern of wax and then baked so as to melt and drain off the wax. Also called cire perdue.
[1930-35; trans. of F cire perdue]

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▪ metal casting
also called  cire-perdue,  

      method of metal casting in which a molten metal is poured into a mold that has been created by means of a wax model. Once the mold is made, the wax model is melted and drained away. A hollow core can be effected by the introduction of a heat-proof core that prevents the molten metal from totally filling the mold. Common on every continent except Australia, the lost-wax method dates from the 3rd millennium BC and has sustained few changes since then.

      To cast a clay model in bronze, a mold is made from the model, and the inside of this negative mold is brushed with melted wax to the desired thickness of the final bronze. After removal of the mold, the resultant wax shell is filled with a heat-resistant mixture. Wax tubes, which provide ducts for pouring bronze during casting and vents for the noxious gases produced in the process, are fitted to the outside of the wax shell, which may be modeled or adjusted by the artist. Metal pins are hammered through the shell into the core to secure it. Next, the prepared wax shell is completely covered in layers of heat-resistant plaster, and the whole is inverted and placed in an oven. During heating, the plaster dries and the wax runs out through the ducts created by the wax tubes. The plaster mold is then packed in sand, and molten bronze is poured through the ducts, filling the space left by the wax. When cool, the outer plaster and core are removed, and the bronze may receive finishing touches. See also investment casting; sculpture: Reproduction and surface-finishing techniques (sculpture).

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Universalium. 2010.

Look at other dictionaries:

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  • Lost wax process — Lost wax process. См. Точное литье по восковым моделям. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • lost-wax process — ˈ ̷ ̷| ̷ ̷ noun Etymology: lost wax translation of French cire perdue : cire perdue * * * /lawst waks , lost /, Metall. a process of investment casting in which a refractory mold is built up around a pattern of wax and then baked so as to melt… …   Useful english dictionary

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  • Lost-wax casting — A model of an apple in wax …   Wikipedia

  • lost wax — noun A method of casting a sculpture in which a model of the sculpture is made from wax; the model is used to make a mould; when the mould has set, the wax is made to melt and is poured away, leaving the mould ready to be used to cast the… …   Wiktionary

  • lost-wax casting —    A casting process for which a sculptor must first produce his sculpture in wax. He creates a mold around this made of refractory materials. When the mold is heated, the wax melts away, so that molten metal can replace it, reproducing exactly… …   Glossary of Art Terms

  • lost wax — noun Date: 1909 a process used in metal casting that consists of making a wax model, coating it with a refractory to form a mold, heating until the wax melts and runs out of the mold, and then pouring metal into the vacant mold …   New Collegiate Dictionary

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