Experiment and Numerical Modelling the Time of Plate-Shape Casting Solidification vs. Thermal Conductivity of Mould Material/ Eksperyment I Modelowanie Numeryczne Czasu Krzepniecia Odlewu Płyty W Funkcji Przewodnictwa Cieplnego Materiału Formy
The paper presents results of measuring thermal conductivity of sand mould material and time of castings solidification evaluated from cooling curves and from Nova Flow & Solid numerical calculations. During the experiments pure Al (99,95%) plate was cast into the sand moulds. The analysed variable parameter in numerical calculations was mould thermal conductivity of fixed value taken from the range 0.5-0.9 W/(mK). Other mould parameters (initial temperature, mass density, heat capacity) and thermo-physical properties of liquid and solid casting were taken invariable. Basing on the measurements it was stated that thermal conductivity of the moulding sand has complex temperature variability, especially during the water vaporization and the obtained dependence should be used in the numerical calculations to improve their accuracy.
 P.K. Krajewski, J.S. Suchy, G. Piwowarski, W.K. Krajewski, Thermo-physical properties vs. temperature of selected foundry sands, Proceedings of the 71st World Foundry Congress “Advanced Sustainable Foundry”, 21-24 May 2014, Bilbao, Spain (on USB Memory Flash).