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The concept of the Thingmaker was introduced in 1963, as part of Mattel's Vac-U-Maker set. This omnibus toy combined the new moulds and Plasti-Goop technology with the existing Vac-U-Form machine, a vacuum forming toy, which molded simple sculptures by heating thin sheets of plastic, then using a vacuum pump to form the softened plastic over hard plastic forms.
The mold is formed around this chemise by covering it with loam. This is then baked (fired) and the chemise removed. The mold is then stood upright in a pit in front of the furnace for the molten metal to be poured. Afterwards the mold is broken off. Molds can thus only be used once, so that other methods are preferred for most purposes.
For a particular toy, bookend, or doorstop, metalworkers would first carve a wood form, or hammer out the basic design in metal. Pressing this form into finely compacted sand created an impression for molding. Cast iron heated to 3000 degrees was poured into the sand mold and, when cooled, the form would pop out.
Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape and work similarly to an injection mold during the process.
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A moldmaker (mouldmaker in English-speaking countries other than the US) or molder (moulder) is a skilled tradesperson who fabricates molds (or moulds) for use in casting metal products. [1] Moldmakers are generally employed in foundries, where molds are used to cast products from metals such as aluminium and cast iron.
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The depth of the mold can range from 0.5 to 2 metres (20 to 79 in), depending on the casting speed and section size. The mold is water-cooled to solidify the hot metal directly in contact with it; this is the primary cooling process. It also oscillates vertically (or in a near vertical curved path) to prevent the metal sticking to the mold walls.
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