The use of local oils, namely groundnut oil, cotton seed oil and palm oil with Nigeria local clay andudsilica sand for the production of foundry cores has been investigated on varying composition. Additionudof cassava starch, local clay, oil and moisture to sand are used to produce strong and efficient core.udThese oils were tested and it was found that the three could be used to produce foundry cores. Theudbest composition was found to be core comprising 2.5% starch, 2.5% clay, 8% oil, 8% moisture and 68%udsand and baked at 150oC for 1 h 30min. The tensile strength of the core were as high as 600 KN/m2.
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