Processing Machinery
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PMMA Weld Line Obvious
Problem Phenomenon
Weld lines on PMMA transparent parts are visible and weak in strength
Cause Analysis
Molecular orientation and impurities concentrate where two melt flows converge, making weld lines optically visible in transparent parts; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Raise melt temperature and mold temperature; single-gate design to reduce weld lines; keep weld lines away from optical and stressed areas; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Weld lines on transparent parts must be avoided by gate design; 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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