Processing Machinery
2 views
Difficult Machine Purging of CMC
Problem Phenomenon
CMC purging takes 2-3h, affecting changeover efficiency
Cause Analysis
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
Solution
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
Key Takeaway
Difficult purging is caused by strong CMC adhesion; PE flushing and temperature reduction are the key
Was this helpful?
0 people found this helpful
Thank you for your feedback!