The investment casting process uses a ceramic mould formed on a wax or polystyrene pattern. The pattern is melted or burned out, and the mould is then filled with molten metal. The industry makes a wide range of precision products such as gas turbine blades, pump casings, valves and machine parts.
The trade association BICTA is still unhappy about the requirements of the new pollution control regime. The main bones of contention are the e