Molds & Tooling
3 Aufrufe
Insufficient flatness of PU
Problembeschreibung
Flatness of PU flat products >0.5mm/100mm, warpage
Ursachenanalyse
PU shrinkage large and different in each direction; mold cooling uneven; residual stress release causing continuous warpage
Lösung
1) Uniform mold temperature to reduce temperature difference; 2) Increase holding pressure to reduce shrinkage difference; 3) Annealing to release residual stress
Wichtigste Erkenntnis
Insufficient flatness is caused by shrinkage difference and stress; uniform cooling and annealing are key
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!