Processing Machinery
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PPO Equipment Corrosion and Wear
Fenómeno do problema
After long-term PPO production, the barrel and screw show abnormal corrosion and wear, plasticizing quality decreases, and black speck impurities increase.
Análise das causas
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.
Solução
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.
Conclusão principal
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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