Injection Molding
2 views
PETG '2079851475616104452 screw speed too high, gasification
Problem Phenomenon
Excessive screw speed causes melt shear overheating, bubbles and degradation.
Cause Analysis
Excessive screw speed produces a large amount of shear heat, exceeding the PETG thermal stability limit.
Solution
Reduce the screw speed to a reasonable range of 50-100rpm; use back pressure to discharge gas.
Key Takeaway
PETG screw speed should be as low as possible under the premise of ensuring plasticization.
Was this helpful?
0 people found this helpful
Thank you for your feedback!