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Lesson 6: Balancing Family Molds

Injection molding is generally an economical manufacturing process. Developing high cavitation molds and designing gating and runner systems to manage overall production costs is a key to profitability. In this lesson we will learn about designing and balancing family molds, an economical solution for molding a variety of different parts.

The topics covered in this lesson include: advantages and disadvantages to using family molds, how to design a two-gate runner system for two sets of molds, how different runner systems impact fill patterns ad injection pressures, and whether four-cavity part and runner systems could be a solution for parts with different volumes.

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Mold Design Balancing Family Molds 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.