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Priority to BG9419891ApriorityCriticalpatent/BG51283A1/en
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The method is used to cast metallic and plastic models, cores, etc. It increases the casting efficiency and the quality of the manufactured moulding equipment. According to the method, a sealed mould, made of a coarse-grain fireproof material containing a duct cavity, is placed around a foil-wrapped pattern. Between the walls of the duct cavity and the pattern, a filler of fine-grain fireproof material is formed. This medium is sealed through vibration and later sealed through linking it with the coarse-grain filler.
BG9419891A1991-04-051991-04-05Method for making casting moulds
BG51283A1
(en)