Material Drying
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TPE Dehumidifying Drying
Problem Phenomenon
Bubbles remain after drying TPE overmolding material in an ordinary oven
Cause Analysis
The moisture requirement of overmolding material is strict; ordinary ovens have insufficient dehydration depth; 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
Use a dehumidifying dryer with dew point -40℃ for overmolding material; confirm moisture content by actual measurement; 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
Drying of overmolding material requires dehumidifying equipment; 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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