Degating Formulas

The Degating process uses the formulas below.

Cycle Time = Process Time * Cycle Time Adjustment Factor

Degating cycle time is the product of the following:

• Process time (see formula below)

• Cycle time adjustment factor: specified by the cost model variable cycleTimeAdjustmentFactor; 1 in aPriori starting point VPEs.

Process Time = (Total Ingate Area + Riser Base Area) / Degating Feed Rate)

Degating process time depends on the following:

• Total ingate area is the cross-sectional area of an ingate (see the formula for Ingate Area in Gating System Model) times the number of ingates (see Number of Ingates in Moldmaking Setup Options).

• Riser base area (see formula)

• Degating feed rate (specified by the machine property Feed Rate)

Riser Base Area = Pi * Riser Radius2

Riser base area depends on riser radius, which is half the riser diameter (see formula)

Riser Diameter = ( 8 * Riser Volume) / Pi )1/3

Because the riser height is assumed to be half the diameter, riser diameter can be determined from riser volume alone.