Potentials of <i style="mso-bidi-font-style: normal">Elaeis guineensis</i> and <i style="mso-bidi-font-style:normal">Pinus sylvestris</i> as binders on foundry core strength

Abstract

The potential of foundry sand core binders made with palm oil (<i style="mso-bidi-font-style:normal">Elaeis</i> <i style="mso-bidi-font-style:normal">guineensis)</i> and pine oil (<i style="mso-bidi-font-style:normal">Pinus</i> <i style="mso-bidi-font-style: normal">sylvestris)</i> were investigated. Core specimens made with Ota silica base sand bonded with percentage of cassava starch in admixed proportion of <i style="mso-bidi-font-style:normal">Elaeis</i> <i style="mso-bidi-font-style: normal">guineensis</i> and <i style="mso-bidi-font-style:normal">Pinus</i> <i style="mso-bidi-font-style:normal">sylvestris</i> were tested for tensile, compressive strength, permeability and time of collapse to establish the binder’s efficiency. Tensile strength of the green baked core were oven baked at 50°C, 100°C 150°C and 200°C; cooled to room temperature and tested with universal strength machine. The combined evaluation of the oils at higher percentages of starch addition indicates a significant improvement on the foundry properties. The cylindrically shaped permeability specimens were tested with permeability meter. Study revealed that cores baked at 150°C for palm oil attained a significant strength at lower baking periods than others. Pine oil showed an improve properties at 6% cassava starch at 200°C.