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Lesson 3: Optimizing Cold Runner Sizes, Part 1

Designing effective cold runner systems is as important as designing a molded part. After determining the gate location for a new part designs, the next step is optimizing cold runner sizes. Cold runner size will influence overall part quality, molding cycle time, and overall profits.

Topics covered in the first part of this lesson include: factors to consider in cold runner designs, how to optimize cycle time using different gate runner designs, how different gate designs and sizes influence injection pressures, cooling behavior, and clamp tonnages, and how reducing runner volume can save money.

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Mold Design Optimizing Cold Runner Sizes Play Screen


Goals of Mold Design: Cold Runners (Level 1): 

  • Learn the basics of mold design and how various design elements impact a molded part
  • Learn how to optimize different runner systems to achieve high quality molded parts
  • Analyze real-life simulations and learn to determine optimal outcomes

Section Description: 

Cold runner systems are an important aspect of mold design. By optimizing cold runner shapes and sizes, important molding processes such as pressure drops, polymer shearing, packing and cooling behavior, gate sealing time, and overall cycle time can be made more efficient as well.


Recommended For: Entry Level Personnel, All Personnel

Length: Lessons are approximately 15-20 minutes long each
