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7 Nisan 2015 Salı

WHAT IS THE CASTING ?

CASTING: 1. Casting that consists of pouring molten metal into a mold, where it solidifies into the shape of the mold. The process was well established in the Bronze Age (beginning c. 3000 bc), when it was used to form bronze pieces. It is particularly valuable for the economical production of complex shapes, from mass-produced parts to one-ofa- kind items or even large machinery. Three principal techniques of casting were successively developed in prehistoric Europe: one-piece stone molds for flat-faced objects; clay or stone piece molds that could be dismantled and reused; and one-off clay molds for complex shapes made in one piece around a wax or lead pattern (cire perdue). Every metal with a low enough melting point was exploited in early Europe, except iron and steel, and used for casting artifacts. 2. A process for forming a ceramic object by pouring a clay slip into a hollow, porous (usually plaster) mold and leaving it there long enough for a layer of clay to settle and thicken on the mold wall. The remaining slip is poured off, and the object is removed from the mold when it has dried. [slip casting, solid casting]

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