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Casting jewellery and small parts

  • Author:Coolidge
  • Source:www.diecastingpartsupplier.com
  • Release on :2018-08-13
The lost-wax process can be used with any material that can burn, melt, or evaporate to leave a mould cavity. Some automobilemanufacturers use a lost-foam technique to make engine blocks. The model is made of polystyrene foam, which is placed into a casting flask, consisting of a cope and drag, which is then filled with casting sand. The foam supports the sand, allowing shapes that would be impossible if the process had to rely on the sand alone. The metal is poured in, vaporizing the foam with its heat.

In dentistry, gold crowns, inlays and onlays are made by the lost-wax technique.Application of Lost Wax technique for the fabrication of cast inlay was first reported by Taggart. A typical gold alloy is about 60% gold and 28% silver with copper and other metals making up the rest. Careful attention to tooth preparation, impression taking and laboratory technique are required to make this type of restoration a success. Dental laboratories make other items this way as well.

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