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Troubleshooting Guide for Injection Molding

Page 1 of 4 Troubleshooting Guide for Injection Molding Troubleshooting is the art and science of remedying defects after the process has demonstrated the ability to produce acceptable production parts. Most defects respond to one of a variety of process and/or material changes. The goal is to correctly identify which problem is actually causing the defect and to know when a particular solution will work. When making adjustments consider the following recipe: Create a mental image of what should be happening, Look for obvious differences, Make only one change at a time, and Allow the process to stabilize after any change is made.

coating defect, cosmetic defect, compressive buckling, crazing, degradation, electrostatic ... Under packing, excessive shrinkage – see solutions to short shot Improperly balanced mold temperatures (colder on movable half) Reduce cycle time (sticking on cores)

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