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Lesson 3b: Optimizing Cold Runner Sizes, Part 2

Designing cold runner systems is as important as designing and optimizing a molded part. After choosing the proper gate location on 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.

The second part of this lesson covers optimizing cold runner systems, how different systems influence injection pressures, cooling behavior, and clamp tonnages, and how runner and overall shot volume are related to material usage and cost.

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Mold Design Optimizing Cold Runner Sizes Play Screen

Learn the basics of mold design and how various design elements impact a molded part. Build your own Circle of Knowledge lesson by lesson. 

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.

Explanations, simulations, cause and effect analyses, and the uses of various design features are covered in this section. Understanding these design features is important because they influence the moldability, function, appearance, and quality of a part.

Recommended For: Entry Level Personnel, All Personnel

Length: Lessons are approximately 15-20 minutes long each

The Kruse Training platform delivers knowledge and expertise developed over two decades in the plastic injection molding industry. Now companies and individuals can access a state-of-the-art online training program, suited for all levels of knowledge.