Processing Machinery
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PVDF Product Weld Line
Problem Phenomenon
Low weld line strength.
Cause Analysis
Low melt front temperature and poor fusion; PVDF crystallizes quickly and the melt front cools significantly.; 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 materials, and it should be confirmed first during troubleshooting
Solution
①Increase melt and mold temperatures; ②optimize gate position; ③increase confluence speed; ④set an overflow well.; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Weld lines are managed by temperature and gate.; After confirming effectiveness, fix 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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