Extrusion & Post
8 views
Rough surface in EAA extrusion
Problem Phenomenon
The surface roughness of EAA extruded products is Ra>5μm, exceeding the requirement
Cause Analysis
Extrusion temperature too low <180°C, melt flow unstable; inner wall of the die rough or damaged; EAA melt elasticity, uneven extrusion swell
Solution
1) Raise the extrusion temperature to 180-240°C; 2) Polish the inner wall of the die to Ra<0.4μm; 3) Reduce the extrusion rate by 10-15%; 4) Add 0.3-0.5wt% external lubricant
Key Takeaway
Surface roughness is caused by low-temperature extrusion and die defects; raising the temperature and polishing the die are the core countermeasures
Was this helpful?
0 people found this helpful
Thank you for your feedback!