Processing Machinery
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PPS Product Flow Marks
Problem Phenomenon
Surface flow marks and ripples.
Cause Analysis
Low front temperature or unsteady filling.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
①Increase temperature; ②optimize the speed curve; ③enlarge the gate; ④fill smoothly.; after adjustment, take continuous samples 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
Flow marks are improved by temperature and speed.; 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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