CLACULATIONS INVOLVING DESIGN OF FEEDING SYSTEM 1. CALCULATION OF FEEDER SIZE The feeder must satisfy both of the following two requirements: 1.1 Heat transfer criteria M C : M N : M F = 1 : 1.1 : 1.2 (1) where M F, M C and M N are modulus of feeder, modulus of casting, and modulus of the neck of feeder at the junction of casting …