Runner Balance analysis

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

When you launch a Runner Balance analysis, a new study is automatically created in the Project View pane. When the Runner Balance analysis is complete, the results, including the balanced dimensions and a completed Fill analysis, are associated with the newly created study.