Figure 2 shows feeding graph for SG Iron by pressure control risering method (PCR). The design sequence of PCR
involved firstly determining casting significant (largest) modulus (MS), then corresponding modulus of riser neck (MN) and
modulus of riser (MR) using feeding graph of SGI. as shown by the blue line in figure 2.
Table 3 shows modulus parameters for the riser. Riser neck dimensions are measured at the bottom of the radius between
riser and casting. Additional notching of the contact was introduced with notch depth not more than one fifth contact
thickness