Material Drying
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PC Weld Line Bubbles
Problem Phenomenon
[Problem Phenomenon] Bubbles gather at the PC weld lines
Cause Analysis
Confluence entrapping air plus the venting end effect; more obvious when the moisture is not fully removed; when troubleshooting on site, verify each item according to this mechanism one by one, and avoid blindly adjusting the machine based on experience alone; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Strengthen venting in the weld line area; drying up to standard; optimize the confluence position; after adjustment, take samples continuously 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
For PC weld line bubbles, check venting and drying; 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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