Injection Molding
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TPE Overmolding PC
Problem Phenomenon
Interface cracking of TPE overmolded PC parts
Cause Analysis
PC internal stress and TPE shrinkage act together; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry information and should be confirmed first during troubleshooting
Solution
Anneal PC parts to reduce stress; optimize the over'2079851475616104453; interface design; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
Overmolding PC requires handling PC stress first; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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