Conventional gating system for Spheroidal Graphite Iron (SGI) casting, theoretical concepts and casting rules are
some of the design considerations taken into account to calculate gating system needed to ensure shrinkage free casting.
Gating system design considered is shown in table 2
Conventional design procedure states sprue diameter shall be 85% the weight of the casting and for parting line gating
system sprue height is typically taken as 0.5 to 1 times the height of mould cavity