Processing Machinery
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PPS product dimensional accuracy
Problem Phenomenon
Dimensional deviation of precision parts.
Cause Analysis
PPS low shrinkage and dimensional stability are advantages; but process fluctuations still affect accuracy.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
①Stabilize mold temperature and holding pressure; ②measure actual shrinkage compensation; ③inspect after aging; ④SPC monitoring.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPS dimensional stability must be realized through process stability.; 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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