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Molding (process)

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Shaping a liquid or plastic material by making it conform to a more rigid mold

For other uses, seeMold (cooking implement) andMolding (decorative).

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One half of a bronze mold for casting a socketed spear head dated to the period 1400-1000 BC. There are no known parallels for this mold.

Stone mold of the Bronze Age used to produce spear tips.

Ancient Greek molds, used to mass-produce clay figurines, 5th/4th century BC. Beside them, the modern casts taken from them. On display in theAncient Agora Museum in Athens, housed in theStoa of Attalus.

Ancient wooden molds used forjaggery & sweets, archaeological museum in Jaffna, Sri Lanka.

Molding (American English) ormoulding (British andCommonwealth English; seespelling differences) is the process ofmanufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix.^[1] This itself may have been made using a pattern or model of the final object.

Amold ormould is a hollowed-out block that is filled with a liquid or pliable material such asplastic,glass,metal, orceramic raw material.^[2] The liquid hardens or sets inside the mold, adopting its shape. A mold is a counterpart to acast. The very common bi-valve molding process uses two molds, one for each half of the object.

Articulated molds have multiple pieces that come together to form the complete mold, and then disassemble to release the finished casting; they are expensive, but necessary when the casting shape has complex overhangs.^[3]^[4]

Piece-molding uses a number of different molds, each creating a section of a complicated object. This is generally only used for larger and more valuable objects.

Blow molding is a manufacturing process for forming and joining hollow plastic or glass parts.

A manufacturer who makes molds is called amoldmaker. Arelease agent is typically used to make removal of the hardened/set substance from the mold more easily effected. Typical uses for molded plastics include moldedfurniture, moldedhousehold goods, moldedcases, and structural materials.^{[citation needed]}