Cold runner systems, which bridge the molding machine to a part forming cavity, are a significant factor in determining the success or failure of an injection molded part. Optimally sizing a runner system provides several critical advantages:
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Sizing Up Your Runner System
The topic of runner sizing always comes up during our plastics education courses. Everyone wants a magic formula for sizing every runner for every mold regardless of machine capabilities, pressure to fill the part, cycle time requirements and packing. So let’s take a look at various methods people use for sizing runner systems.