Runner Balance analysis

The Runner Balance Analysis is used to determine the optimum volume for the sections of the runner system. This analysis ensures that the part fills evenly and there is an acceptable pressure magnitude in the cavity, minimizing runner volume.

The Runner Balance analysis is supported for the following analysis technologies:

• Midplane
• Dual Domain
• 3D

How it works

Runner systems should be balanced to reduce overpacking during the filling phase. During a Runner Balance analysis, the runner system dimensions are altered to ensure that parts fill simultaneously and the volume of the feed system is minimized.

A well-balanced runner system can make considerable savings in material usage. Before performing a Runner Balance analysis, you should check the Fill analysis and ensure that you are satisfied with each of the following:

• Molding conditions.
• Gate locations.
• Cavity balance.

The Runner Balance analysis is for a model with an attached runner system. A runner system that is added after a Fill+Pack analysis helps you balance the cavities. The aim is to achieve runner dimensions with the following characteristics:

• The same pressure drop in all flow paths, which fills all cavities simultaneously
• Controlled shear heating, which minimizes stress levels without using a high melt temperature
• Minimized volume of runner material relative to cavity volume, which achieves the highest possible pressure drops in the runner system