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Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Engineering technology

Topic: Pressure flasks casting

Prepared by: Ing. Elena Nov

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

Pressure flasks casting

Castings is made without permanent models as follows: Pressure castingCasting into ingot mould Centrifugal casting Continuous casting Casting with permanent moulds

Machine for pressure casting Casting to permanent moulds

Shaping block : Copping plate Casting with permanent moulds

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 mouldsMelted metal is piston ejected from pressure chamber. Ejection is provided by two methods:- from hot chamber- from cold chamberCasting with permanent moulds

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). Casting with permanent moulds

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. Casting with permanent moulds

Describe picture

Explain technology:

Describe picture

http://www.diecasting.org/faq/http://u12133.fsid.cvut.cz/podklady/MPL/modifikace_tlakoveho_liti.pdf

Used literature