Injection Molding
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Periodic PVA surface corrugations
Fenómeno do problema
PVA product surface has periodic corrugations with spacing 5-15mm
Análise das causas
Injection speed periodically fluctuating; hydraulic system unstable; screw rotation speed unstable
Solução
1) Overhaul the injection system to stabilize pressure and speed; 2) Servo motor drive replacing hydraulic drive; 3) PID control to stabilize injection parameters
Conclusão principal
Corrugations are caused by unstable injection; equipment overhaul and PID control are the key
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