Processing Machinery
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PPO Equipment Corrosion and Wear
Problem Phenomenon
After long-term PPO production, the barrel and screw show abnormal corrosion and wear, plasticizing quality decreases, and black speck impurities increase.
Cause Analysis
Molten PPO is potentially corrosive to certain metals; high process temperatures accelerate the corrosion process; glass fiber reinforced grades superimpose abrasive wear; improper equipment material selection sharply reduces service life.
Solution
①Select corrosion-resistant and wear-resistant materials for parts in contact with the melt; ②adopt a bimetallic structure for the barrel; ③regularly inspect the screw-barrel clearance; ④establish equipment life management records.
Key Takeaway
The corrosiveness of PPO to equipment is often underestimated; material upgrading is a one-time investment with long-term returns; wear measurement enables predictive maintenance.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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