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Lesson 5: Flash

As injection molded parts become more complex so do mold designs. Complex mold designs may require multiple inserts, side cams, or pins, all with various parting lines. These intersecting mold components increase the risk of parting line flash, the focus of this molding defects lesson.

Topics in this lesson include: how flash occurs in injection molded parts; factors that can influence flash development; how to analyze flash development using different size overflow gaps on a sample part; and how process parameters can impact parting line flash.


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