Extrusion & Post
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PE Extrusion Output Decline
Fenómeno do problema
PE extruder output drops 10%~30% below the rated value, with significantly reduced output at the same screw speed, accompanied by worsening plasticization.
Análise das causas
Screw and barrel wear increases the fitting gap (>0.3mm), reducing the conveying and pressure-building efficiency; screen pack blockage, improper temperature settings and unstable feeding also cause output decline; long-term processing of filled regrind accelerates wear.
Solução
①Measure the screw-barrel gap, and repair or replace it if out of spec; ②regularly replace the screen pack; ③check and optimize the temperature profile; ④check the feeding system and hopper cooling; ⑤select wear-resistant material screws and barrels for wear conditions.
Conclusão principal
For long-term PE extrusion output decline, first measure the screw gap—this is the most decisive hardware indicator; output is a barometer of equipment health; do not just rely on raising the screw speed to hold on, as that will further accelerate wear.
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