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Tutorial: Engineering technology Topic: Pressure – flasks casting Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
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Pressure – flasks casting
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Castings is made without permanent models – as follows: Pressure casting Casting into ingot mould Centrifugal casting Continuous casting
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Machine for pressure casting
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Shaping block : Copping plate
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1.Pressure casting In pressure casting is melted steel pressured with a great speed into two or multiple moulds system. High pressure ensures the best penetration of the melted steel into complicated forms of thin-walled moulds Melted metal is piston ejected from pressure chamber. Ejection is provided by two methods: - from hot chamber - from cold chamber
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Casting from hot chamber – the chamber is submerged in melted metal. It is used for casting of zinc, lead and magnesium alloys (metals with lower melting point than steel).
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Melted metal poured into cold chamber and ejected by piston into a mould. It is used for casting of copper and aluminum alloys. If hot chamber would be used the melted alloys would react with steel walls of chamber and piston.
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Explain technology:
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http://www.diecasting.org/faq/ http://www.diecasting.org/faq/ http://u12133.fsid.cvut.cz/podklady/MPL/m odifikace_tlakoveho_liti.pdf http://u12133.fsid.cvut.cz/podklady/MPL/m odifikace_tlakoveho_liti.pdf
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