Extrusion & Post
11 görüntüleme
EVOH extrusion dimensions are unstable
Sorun Belirtisi
EVOH extruded product cross-sectional dimensions fluctuate ±10%, with periodic changes also in the length direction
Neden Analizi
Unstable feeding amount with feeding screw rotation speed fluctuation; extrusion temperature periodic fluctuation ±5°C; traction speed not matching extrusion speed
Çözüm
1) Use a loss-in-weight feeder to ensure stable feeding; 2) PID control of each extruder zone temperature with accuracy ±1°C; 3) Closed-loop control of traction speed linked with extrusion speed; 4) Control processing temperature at 190-230±5°C
Temel Çıkarım
Extrusion dimensional stability depends on feeding accuracy, temperature control, and traction synchronization
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