There are many practicle applications of runners in mold design. The runner in the picture above (T shaped bit) allows two parts to be made from a single gate. When the plastic has cooled, this runner can then be removed. The video below will explain how to create a runner and then run an analysis on it using SolidWorks Plastics.
A simplified version of the CAD file used in the video above can be downloaded by clicking
In the next blog post, I will explain some more advanced meshing options.