Shell Moulding Casting

The shell molding process employing synthetic thermosetting resin mixed with high grade silica sand and is a method of producing sand castings to very much closer tolerances. It is, of course, a machine molding process. The pattern plates used for this process must be of metal and capable of withstanding temperatures of 250-300°C. The amount of “draw” required for these patterns can be greatly reduced and rapping the pattern is not used for ejecting the mould from the pattern plate.