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Lesson 5: Fiber-Filled Materials

Injecting polymer materials into molds causes complex behaviors. Molecular chain elongation and orientation during filling and relaxation during packing and cooling are all highly dependent on design complexity and the molding process. Introducing fibers into the polymer adds another degree of complexity to the fill-to-warp behavior. In this lesson you will learn the impact fiber-filled materials have on shrinkage and warpage  behaviors.

Topic in this lesson include: the types of fiber-filled polymers available for molding, molding and processing factors that impact fiber length, how fiber orientation differs throughout a cross-section of a part, and how gate location impacts fiber orientation and resulting warpage inside a part.


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Fiber-Filled Materials

Learn the fundamentals of process optimization by understanding how different phases in the injection molding cycle will influence the overall part quality. Build your own Circle of Knowledge lesson by lesson. 

Goals of Processing: Shrinkage and Warpage (Level 1): 

  • Learn the fundamentals of shrinkage and warpage during the processing phase of injection molding
  • Gain an understanding of how part design, mold design, and process are connected and interdependent
  • Analyze real-life molded parts and learn the cause and effect behaviors of design and process

Section Description: 

Molding high-quality parts is dependent on many factors, including skillful part and mold design, an understanding of polymer material behavior, and an optimized process. It is important for injection molding processing engineers to follow key steps to ensure consistently high-quality molded parts.

Explanations, simulations, cause and effect analyses, and specific shrinkage and warpage examples are covered in this section.

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.