Processing Machinery
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PC Cold Slug Marks
Problem Phenomenon
[Problem Phenomenon] Cold slug marks and front-stage turbulence on the PC surface
Cause Analysis
Low nozzle temperature or insufficient cold slug well; amorphous cold material is difficult to re-fuse; when troubleshooting on site, verify each item according to this mechanism one by one, and avoid blindly adjusting the machine based on experience alone; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Match the nozzle temperature to the front stage; enlarge the cold slug well; increase the injection speed; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate effective measures
Key Takeaway
For PC cold slug marks, check the nozzle and cold slug well; 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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