Quality of v-process moulds through the taguchi technique

The global consciousness for quality has motivated designers and manufacturing engineers to be engaged constantly in product and process development. The approach, quality by design, developed by Taguchi has produced a unique and powerful quality improvement discipline that differs from traditional practices. In the present paper, Taguchi's technique has been applied to obtain an optimal setting of V‐process parameters. The results indicate that the sand grain fineness number and amplitude of vibration are the control factors. These factors affect both the mean and the variation of the bulk density of the V‐process mould. The signal factor, that is the factor that affects only the mean value, is time of vibration. The insignificant factor is the degree of vacuum imposed. The optimum value of bulk density (1–588 gm/cm³) at the optimal setting of these parameters has been obtained and confirmed by further experiments.