APPLICATION OF MOULDING SANDS WITH GEOPOLYMER BINDER IN THE MANUFACTURE OF CASTINGS FROM ALUMINIUM ALLOYS

The article presents the results of laboratory tests on the binding characteristics of moulding sands with inorganic geopolymer binders and for comparison with furan resin and alkaline resin, designed for casting o...

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SELECTED PROBLEMS OF A TECHNOLOGY OF THE AZ91 MAGNESIUM ALLOY MELT TREATMENT

As expected, the increasing demand for magnesium alloy castings has already become a fact. Considering this situation, a rich program of the studies on this particular subject has been initiated and put into operat...

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IDENTIFICATION BY DSH POWDER METHOD OF CRYSTAL PHASES OF SILICA IN DUST EMITTED FROM SAND FOUNDRY

In view of the documented pathogenic effect on human health of dust containing crystalline silica, an attempt has been made to identify different variations of polymorphic silica in samples of dust emitted from fou...

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Processes of pyrolysis and their effect on cast quality and working conditions

The article discusses the thermal processes undergone by the sand mould in contact with the liquid casting alloy. Depending on the character of the atmosphere in the mould, this can be the process of combustion or pyrolysis (when there is no oxyge...

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Analysis of the drying process of moistened surface layers of sand moulds and cores on the example of moulding sand with water glass

An analysis of the drying process of surface layers of sand moulds and cores (made of loose self-hardening moulding sand with hydrated sodium silicate hardened with a liquid ester hardener) which was previously subjected to the process of moisture...

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Selected methods of testing protective coatings applied on casting moulds and cores

This article presents selected research methods related to protective coatings used for sand moulds and cores in the foundry industry. The research methodology has been divided into studies of the technological properties of sand moulds and cores ...

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