Improving of Green Sand-Mould Quality using Taguchi Technique

Abstract

The green sand mould casting is an inevitable process to make large size and complex shape of the industrial components. The quality of green sand in mould is a significant phenomenon on casting quality. In this research, the number of ramming, sand thickness mould, and percentage of additives (western bentonite) mixing with sand have been considered to study the effects on permeability and hardness of mould by L27 orthogonal array. Greensand mould experiments have been conducted in the industry to observe the output parameter variations by Taguchi statistical analysis. It was revealed that the maximum permeability and minimum sand hardness have been obtained from the minimum number of ramming, thin sand thickness, and minimum mixing of additives in the sand. The confirmation tests were conducted to validate the predicted control parameter on responses.

Optimization of Quench Polish Quench (QPQ) Coating Process Using Taguchi Method

“…the percentage of contribution of nitriding temperature, nitriding time, and oxidizing time are 63.877%, 26.397%, and 4.391% respectively. It was observed that nitriding temperature and time are the most significant parameters on the hardness due to the increase in the coating layer thickness and hard/compound layer phases by the chemical reactions [25,26]. The mean and S/N ratio of each process parameter on the hardness is illustrated in Figure 2(a) and (b) respectively.…”