Effect of Some Parameters on the Cast Component Properties in Hot Chamber Die Casting

摘要

Hot chamber die casting process is designed to achieve high dimensional accuracy for small products by forcing molten metal under high pressure into reusable moulds, called dies. The present research work is aimed at study of some parameters (as a case study of spring adjuster) on cast component properties in hot chamber die casting process. Three controllable factors of the hot chamber die casting process (namely: pressure at second phase, metal pouring temperature and die opening time) were studied at three levels each by Taguchi's parametric approach and single-response optimization was conducted to identify the main factors controlling surface hardness, dimensional accuracy and weight of the casting. Castings were produced using aluminium alloy, at recommended parameters through hot chamber die casting process. Analysis shows that in hot chamber die casting process the percentage contribution of second phase pressure, die opening time, metal pouring temperature for surface hardness is 82.48, 9.24 and 6.78% respectively. While in the case of weight of cast component the contribution of second phase pressure is 94.03%, followed by metal pouring temperature and die opening time (4.58 and 0.35% respectively). Further for dimensional accuracy contribution of die opening time is 76.97%, metal pouring temperature is 20.05% and second phase pressure is 1.56%. Confirmation experiments were conducted at an optimal condition showed that the surface hardness, dimensional accuracy and weight of the castings were improved significantly.