@ARTICLE{Onyekwere_O.S._Multi_2017, author={Onyekwere, O.S. and Odiakaose, C. and Uyanga, K.A.}, volume={vol. 17}, number={No 4}, journal={Archives of Foundry Engineering}, howpublished={online}, year={2017}, publisher={The Katowice Branch of the Polish Academy of Sciences}, abstract={In this study, rubber seed/shea butter oil was used to formulate core oil. The formulated core oil was characterised. D-optimal mixture design was used for multi response optimisation of the functional properties of rubber seed-shea butter coil oil. Desirable values for some responses might be obtained from a factor combination while for others responses not so desirable values. Through multiple response optimisations, a factor setting that gives the desirable values for all responses was obtained. The selected optimum mixture setting for the formulated core oil is 65.937% Rubber seed and 34.063% Shea butter oil at desirability of 0.924. Under the optimum condition the functional properties of the core oil was found to be 39.57KN/M2, 626.85KN/M2, 36.63KN/M2, 593.906KN/M2, 412.605 and 167.309s for Green Compressive Strength, Dry Compressive Strength, Green Tensile Strength, Dry Tensile Strength, Permeability and Collapsibility respectively. The optimum conditions were validated with less than 0.2% error. The functional properties of the formulated core oil was compared to the functional properties of linseed core oil. It was found that rubber seed-shea butter core oil can be used for producing cores suitable for Aluminium casting.}, type={Artykuły / Articles}, title={Multi Response Optimization of the Functional Properties of Rubber Seed – Shear Butter Based Core Oil Using D-Optimal Mixture Design}, URL={http://www.czasopisma.pan.pl/Content/104601/PDF/afe-2017-0159.pdf}, doi={10.1515/afe-2017-0159}, keywords={Core oil, Rubber seed oil, Shea butter, Aluminum casting}, }