Processing Machinery
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Screw and Barrel Wear of PEEK
Problem Phenomenon
After PEEK has been produced for a period of time, plasticizing capacity declines, back pressure fluctuates, products show unmelted particles and black specks, and equipment current and abnormal noise increase.
Cause Analysis
PEEK has a high processing temperature and often contains glass fiber and carbon fiber reinforcement, superimposing abrasive wear and corrosive wear on the screw and barrel; after wear, the clearance increases, and plasticizing efficiency and mixing quality deteriorate simultaneously.
Solution
①Regularly measure the screw-to-barrel clearance with special gauges to evaluate the wear amount; ②Repair or replace in time when wear exceeds the limit; ③Select wear- and corrosion-resistant bimetallic barrels and coated screws; ④Standardize purging to reduce dry grinding.
Key Takeaway
PEEK equipment wear is a progressive quality risk; establishing a wear measurement archive enables predictive maintenance; high-temperature-resistant and wear-resistant equipment configuration is the basic investment for long-term stable PEEK production.
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