Processing Machinery
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CEF material changeover residue
Problem Phenomenon
After CEF material changeover, the first 5-10 products contain the previous raw material residue, color difference and performance deviation
Cause Analysis
The previous raw material residue in the barrel and screw is large; the cleaning is not thorough and there is residue in the dead corner area; the cleaning material amount is insufficient
Solution
1) Increase the cleaning material amount to 2-3 times the barrel capacity; 2) Increase the speed and temperature during cleaning to accelerate removal; 3) Disassemble the screw to thoroughly clean the dead corners
Key Takeaway
Material changeover residue is caused by incomplete cleaning; sufficient cleaning and disassembly are the key
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