Suitability of local binder compositional variation on silica sand for foundry core-making
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The use of local oils, namely groundnut oil, cotton seed oil and palm oil with Nigeria local clay and
silica sand for the production of foundry cores has been investigated on varying composition. Addition
of cassava starch, local clay, oil and moisture to sand are used to produce strong and efficient core.
These oils were tested and it was found that the three could be used to produce foundry cores. The
best composition was found to be core comprising 2.5% starch, 2.5% clay, 8% oil, 8% moisture and 68%
sand and baked at 150oC for 1 h 30min. The tensile strength of the core were as high as 600 KN/m2.
Keywords
TJ Mechanical engineering and machinery