Molds & Tooling
3 Aufrufe
Uneven PET chemical foaming
Problembeschreibung
The cell size of PET foamed products is uneven, density distribution is inconsistent, and there is local collapse.
Ursachenanalyse
Blowing agent dispersion is uneven; foaming temperature is improperly controlled; mold temperature distribution is uneven; pressure release rates are inconsistent.
Lösung
Add blowing agent masterbatch by side feeding to ensure uniform dispersion; precisely control temperature; optimize mold temperature uniformity; use in-mold counter-pressure technology.
Wichtigste Erkenntnis
PET chemical foaming uniformity involves multiple aspects: blowing agent dispersion, temperature control and pressure management.
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