Processing Machinery
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PPS product weld line
Problem Phenomenon
Low weld line strength.
Cause Analysis
Low flow front temperature causing poor fusion; the flow front cools quickly at PPS high temperatures.; 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 data and should be confirmed first during troubleshooting
Solution
①Increase temperature; ②optimize gate; ③increase convergence speed; ④set overflow wells.; 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
Weld lines rely on temperature and gate management.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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