Extrusion & Post
8 views
DSTDP extrusion unstable dimensions
Problem Phenomenon
DSTDP extruded product cross-sectional dimension fluctuates ±10%, with periodic variation along the length direction as well
Cause Analysis
Feeding amount unstable, feeding screw speed fluctuates; extrusion temperature periodically fluctuates ±5°C; haul-off speed not matched with extrusion speed
Solution
1) Use loss-in-weight feeder to ensure stable feeding; 2) PID control of each extruder zone temperature with accuracy ±1°C; 3) closed-loop control of haul-off speed linked with extrusion speed; 4) control processing temperature at 160-200±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!