Processing Machinery
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PPO Warpage Correction
Problem Phenomenon
[Problem Phenomenon] Whether already warped PPO products can be corrected and salvaged
Cause Analysis
Warpage originates from internal stress and crystallization (alloy grades) differences; heating post-treatment can partially correct it but with low efficiency; the fundamental solution still lies in process and structural prevention; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Try heat-setting correction for slight warpage; for batch warpage go back and check mold temperature, cooling and holding pressure; prevent warpage from the design source for structural parts; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPO warpage correction treats the symptom; process and structural prevention is the root; 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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