Processing Machinery
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Difficult Machine Purging of CMC
Problembeschreibung
CMC purging takes 2-3h, affecting changeover efficiency
Ursachenanalyse
CMC has strong adhesion and forms a firm adhesive layer on the screw and barrel; CMC has poor thermal stability and becomes sticky at high temperature, making it harder to remove
Lösung
1)Flush with high-viscosity PE before purging to carry away CMC residue; 2)Lower purging temperature below CMC softening point to reduce adhesion; 3)Use special purging compound
Wichtigste Erkenntnis
Difficult purging is caused by strong CMC adhesion; PE flushing and temperature reduction are the key
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