Optimization of process parameters of A-359 aluminium alloy in EPS-assisted-investment casting process using Taguchi method

Abstract

The purpose of this research is to optimize the process parameters such as pouring temperature, pouring time and the thickness of coating using Taguchi mod in expandable polystyrene assisted investment casting process. In this paper, zircon flour and mullite sand with potassium silicate binder and coarse fused-silica sand stucco are used as coating materials. Problems like cracking, breaking, bending, expanding and distending in shell are eliminated by preheating the shell and slowly rise in temperature, during foam removal process. For maximum impact strength, the optimum values of process parameters-pouring temperature, pouring time and thickness of coating layers are 750C, 15 seconds and 5 mm respectively.