Processing Machinery
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Improper Screw Configuration for PSU
Fenómeno do problema
In PSU processing, poor plasticization coexists with overheating degradation; screw load is heavy; equipment alarms are frequent; the process window cannot be stabilized.
Análise das causas
PSU requires a single-flighted full-thread constant-pitch low-compression-ratio screw with an L/D ratio between 14~20; high-viscosity melt requires low-gear stepless speed regulation of 15~45 r/min; improper configuration causes loss of control over both plasticization and shear.
Solução
①Select a single-flighted full-thread constant-pitch low-compression-ratio screw; ②L/D ratio of 14~20; ③Speed of 15~45 r/min with low-gear stepless regulation; ④Precision wear-resistant screw and barrel set configuration.
Conclusão principal
PSU screw configuration has clear industry specifications; low speed protects the high-viscosity melt; precision wear-resistant configuration is the foundation of long-term stability.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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