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Theory of similarity at pressure dies

Ragan E., Ružbarský J.

Archives of Foundry Engineering

2008

Vol. 8, iss. 2

121-122

We get from equations for laminar and turbulent flow criterion equations containing competent criteria without size. Two processes at pressure die casting are similar when their corresponding criteria are equal. We can introduce instead of the real flow the similar model flow. It is possible to introduce then the coefficients of size and pressure similarity for the model liquids of the alloy AlSi water, mercury, woods metal, and tin solder that is in the table.

Development of pressure die casting and permanent-mould casting technologies

Ragan E.

Archiwum Odlewnictwa

2004

R. 4, nr 11/2

137--140

Contribution deals with main directions of pressure die casting and permanent - mould casting. Research of mentioned technologies are made. Results of research are transferred into industrial practice. They are research of metal properties in interval of crystallization especially viscosity of liquid alloys, research of filtration, simulation of die filling and liquid metals solidifying. research of pressure die casting special methods, die materials, research of cooling system of permanent - moulds, thermograph y and radioscopy of permanent - moulds.