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The history of molding sand is difficult to study, as much of the origins of the practice predate writing. Molding sand was used exclusively for bronze casts, which was pioneered by the ancient Chinese. The next major advancement came in India in 500 B.C. when cast-crucible steel was created.
Navajo sandpainting, photogravure by Edward S. Curtis, 1907, Library of Congress. In the sandpainting of southwestern Native Americans (the most famous of which are the Navajo [known as the Diné]), the Medicine Man (or Hatałii) paints loosely upon the ground of a hogan, where the ceremony takes place, or on a buckskin or cloth tarpaulin, by letting the coloured sands flow through his fingers ...
The locals soon realised an opportunity to develop and market small framed sand pictures and also compressed sand patterns inside glass jars to supplement their meagre income. There are some examples of Alum Bay sand pictures at Osborne House and Carisbrook Castle while at the Victoria and Albert Museum , the late Queen Mary's collection of ...
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The cope and drag (top and bottom halves, respectively) of a sand mold, with cores in place on the drag. Two sets of castings (bronze and aluminium) from the above sand mold. Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand—known as casting sand—as the mold material. The term "sand ...
In casting, a pattern is a replica of the object to be cast, used to form the sand mould cavity into which molten metal is poured during the casting process. Once the pattern has been used to form the sand mould cavity, the pattern is then removed, molten metal is then poured into the sand mould cavity to produce the casting.
A core is a device used in casting and moulding processes to produce internal cavities and reentrant angles (an interior angle that is greater than 180°). The core is normally a disposable item that is destroyed to get it out of the piece. [1] They are most commonly used in sand casting, but are also used in die casting and injection moulding.
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