Processing Machinery
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DSTDP material changeover residue
Problem Phenomenon
After DSTDP material changeover, the first 5-10 products contain previous material residue, color difference and performance deviation
Cause Analysis
Large amount of previous material residue in the barrel and screw; incomplete cleaning, residue in dead corner zones; insufficient purging compound amount
Solution
1) Increase purging compound amount to 2-3 times the barrel capacity; 2) increase speed and temperature during cleaning to accelerate removal; 3) disassemble the screw to thoroughly clean dead corners
Key Takeaway
Material changeover residue is caused by incomplete cleaning; thorough cleaning and disassembly are key
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