A Test Stand for Quantifying the Core Gas Release and the Gas Permeability of Inorganically-Bound Foundry Cores

Benedikt Kirchebner, Simon Kammerloher, Georg Fuchs, Erwin Reberger, Wolfram Volk, Philipp Lechner

Research output: Contribution to journalArticlepeer-review

Abstract

Environmental and work safety aspects necessitate a radical change in the foundry industry. Organic binder systems for foundry sand cores create toxic combustion products and are, therefore, more and more often substituted by inorganic binder systems. While providing an environmental advantage by mainly releasing water vapor, inorganic binder systems impose new challenges for the casting process. The gas release of inorganically-bound foundry cores can lead to increased gas porosity in the cast parts and thus to high scrap rates. The present work aims to gain more understanding of the gas generation and transport in inorganic sand binder systems. We developed a test stand to measure the temperature-dependent core gas release in inorganically-bound foundry cores and their gas permeability. Samples were prepared in a core blowing process and analyzed using the test stand. The measurement results are in good agreement with validation experiments and existing literature.

Original languageEnglish
Pages (from-to)1284-1292
Number of pages9
JournalInternational Journal of Metalcasting
Volume18
Issue number2
DOIs
StatePublished - Apr 2024

Keywords

  • core blowing
  • core gas
  • foundry core
  • inorganic binder
  • organic binder
  • permeability

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