Extrusion & Post
8 views
PVA extruded pipe ovality exceeds standard
Problem Phenomenon
PVA extruded pipe ovality >1.05, exceeding the 1.02 standard requirement
Cause Analysis
Uneven pipe cooling, single-side cooling; unreasonable sizing sleeve design; uneven haul-off clamping force causes pipe compression deformation
Solution
1) Adopt annular spray cooling to ensure uniform temperature reduction; 2) Optimize sizing sleeve inner diameter and taper design; 3) Multi-caterpillar uniform clamping haul-off; 4) Increase vacuum sizing section length to ensure full sizing
Key Takeaway
Ovality is caused by uneven cooling and clamping; annular cooling and uniform haul-off are the key
Was this helpful?
0 people found this helpful
Thank you for your feedback!