Extrusion & Post
8 visualizações
ASA Extrusion Melt Fracture
Fenómeno do problema
【Problem Phenomenon】After ASA extrusion speed-up, surface sharkskin roughness
Análise das causas
Die exit shear rate exceeding critical triggers melt fracture; ASA has a speed-up upper limit under medium shear sensitivity; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solução
Reduce line speed or raise die temperature; die flow channel polishing; processing aid when necessary; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusão principal
ASA extrusion sharkskin relies on temperature reduction, speed matching and polishing; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!