This paper presents recent development in reducing materials’ waste and saving energy in investment casting process. Stages in investment casting process are: moulding (tooling, shelling, drying, de-waxing and firing) melting, alloying, pouring, solidification and finishing. It was foun¬¬¬d optimization or improved efficiency by the following procedures can lead to substantial time, energy and cost savings. Use of computer simulation, welding wax patterns onto runners, designing appropriate gating systems, reducing ceramic shell drying time and number of coatings, design and combining firing, preheat and heat treatment processes in one go, type of furnace, and finally accurate control of casting procedure can save energy and improves yield. The idea of using lean practices for improving the process steps is also discussed.
Energy efficiency; Investment casting; Lean practices; shell moulding; Materials