Extrusion & Post
8 views
CEF extrusion dimensional instability
Problem Phenomenon
The cross-sectional dimensions of the CEF extruded product fluctuate ±10%, and there are also periodic changes in the length direction
Cause Analysis
The feeding amount is unstable and the feeding screw speed fluctuates; the extrusion temperature fluctuates periodically ±5°C; the haul-off speed does not match the extrusion speed
Solution
1) Use a loss-in-weight feeder to ensure stable feeding; 2) PID control of the temperature of each section of the extruder with an accuracy of ±1°C; 3) Closed-loop control of the haul-off speed linked with the extrusion speed; 4) Control the processing temperature at 160-220±5°C
Key Takeaway
Extrusion dimensional stability depends on feeding accuracy, temperature control and haul-off synchronization
Was this helpful?
0 people found this helpful
Thank you for your feedback!