2000 | OriginalPaper | Chapter
Troubleshooting and Maintenance
Authors : Dominick V. Rosato, P.E., Donald V. Rosato, PH.D., Marlene G. Rosato, P.E.
Published in: Injection Molding Handbook
Publisher: Springer US
Included in: Professional Book Archive
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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: (1) create a mental image of what should be happening, (2) look for obvious differences, (3) make only one change at a time, and (4) allow the process to stabilize after any change is made. Studies have determined that about 60% of defects result from machines and equipment, 20% from molds and dies 10% from material, and 10% from operator error. Software programs, either already installed on the machine’s processor controller or available as a software package, can provide some help (157, 158, 255, 582).