Abstract
In case of the decomposition of foundry artificial resin-bonded moulding materials, the amount and the pressure of the produced gases can have significant effect on the quality of the casting surface during the early phases of the solidification. The produced gases can cause casting defects if the casting skin is not solidified before the gas could pass through. The cores were made out of commercially available multi-element (SH33-34) and sieved SH33 sands with phenol no-bake process, with the same resin content. The gas permeability and gas pressure of the released gases were examined. Furthermore, the changes in the gas pressures of the gases released from various resin quality cores at different casting temperatures were also examined.
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