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Understanding cold runner patterns is an important aspect of mold design. The first step in designing a cold runner system is determining best gate placement. In the first part of this lesson we will learn about gate patterns and placement for cold runner systems.
The first part of this lesson covers the filling behavior for two runner systems with different types of gates and how the differences in gates sizes impact pressure spikes, pressures at fill, shear rates, and shear stress at fill.
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Learn the basics of mold design and how various design elements impact a molded part. Build your Circle of Knowledge lesson by lesson.
Goals of Mold Design: Cold Runners (Level 1):
Section Description:
Cold runner systems are an essential 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 also be made more efficient.
This section covers explanations, simulations, cause-and-effect analyses, and the uses of various design features. Understanding these design features is important because they influence a part’s moldability, function, appearance, and quality.
Recommendation: Entry-Level Operators, Technicians, & Designers
Length: Lessons are approximately 15-20 minutes long each
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