Processing Machinery
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PVC Cooling and Calibration
Problem Phenomenon
PVC profile bent and deformed after calibration
Cause Analysis
Uneven calibration cooling makes profile parts shrink differently; during on-site troubleshooting, verify item by item according to this mechanism, 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
Calibration die water temperature and vacuum uniform; haul-off speed stable; adjust water channel where cooling uneven; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Profile deformation controlled by calibration cooling uniformity; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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