Phosphate and plaster bonded syntactic foams for collapsible cores in light metal casting

Conference Dates

March 26-31, 2017


In the casting industry so called “lost cores” are used to fabricate cavities in casted components. Those cores are typically made from inorganic materials like sand and have to satisfy a variety of requirements – some of which are contradictory. Among others, they have to be stable against the thermal and mechanical loads of the casting process; they must not be infiltrated by the metal melt or induce chemical reactions detrimental to the performance of the casting. Last but not least demolding has to be easy, i.e. the core has to be destroyed and removed from the casting very easily and without any residues. Especially for small and delicate cores these requirements are very difficult to meet.

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