Molds & Tooling
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Stratification and segregation of PET blended materials
Problembeschreibung
PET pellets, color masterbatch, recycled material and other components stratify and segregate in the hopper or during conveying, causing uneven composition.
Ursachenanalyse
The particle size and density of each component differ greatly; the hopper flow pattern causes segregation; conveying vibration aggravates separation.
Lösung
Use components with matched size and shape (uniform granulation); use a mixer in the hopper; adopt forced metering feeding.
Wichtigste Erkenntnis
PET blended material uniformity is the prerequisite for product consistency.
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