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Ceramic Mold Casting Pdf Download
The main advantages of ceramic molds are: a reusable pattern (the item used to create the shape of the mold), excellent surface finish, close dimensional tolerances, thin cross-sections, and intricate shapes can be cast. Prior to pouring metal, the mold is pre-warmed to control shrinkage.. Once prepared, the two halves of the mold are assembled for the pouring of the metal casting. the item used to create the shape of the mold) is used. Instead, the mold is partially cured so the pattern can be removed and it is then completely cured by firing it at approximately 1,900F (1,040C). p.1313.
Figure:29 . The slurry hardens almost immediately to a rubbery state (the consistency of vulcanized rubber). ^ a b Metal Casting Techniques - Ceramic Molding (Shaw Process), archived from the original on 2007-10-25, retrieved 2010-12-15. Cross-sections as thin as 1.3mm (0.051in) are possible, with no upper limit. Then a torch is used to ignite the mold, which causes most of the volatiles to burn-off and the formation of ceramic microcrazes (microscopic cracks). Characteristics. Unlike in plaster mold casting, the ceramic mold has excellent permeability due to the microcrazing, (production of microscopic cracks), that occurs in the firing of the ceramic mold. ^ a b Blair, Malcolm; Stevens, Thomas L.
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