Molds & Tooling
1 views
PBT product flow marks
Problem Phenomenon
Wavy flow marks on the surface.
Cause Analysis
Low front temperature; slow speed or small gate.; when troubleshooting on site, 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 when troubleshooting
Solution
①Increase material temperature and mold temperature; ②increase speed; ③enlarge the gate; ④smooth filling.; after adjustment, continuously sample 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 troubleshooting reference for similar problems in the future
Was this helpful?
0 people found this helpful
Thank you for your feedback!