Injection Molding
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TPE overmolding not firm
Problem Phenomenon
Interface peeling of TPE overmolded parts
Cause Analysis
Low interface temperature, contamination, or incompatible materials; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry materials and should be confirmed first during troubleshooting
Solution
Preheat the hard plastic; clean the interface; select compatible overmolding material; mechanical interlocking 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, so as to locate effective measures
Key Takeaway
Overmolding bonding relies on the three elements of temperature, cleanliness, and compatibility; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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