Injection Molding
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Frequent nozzle clogging during injection
Fenómeno do problema
During injection, the nozzle discharges poorly or even becomes completely clogged
Análise das causas
Glass fibers aggregate and bridge at the nozzle opening; the nozzle orifice is too small to pass melt containing long fibers; the nozzle temperature is insufficient causing excessive melt viscosity
Solução
Increase the nozzle orifice to ≥5mm; increase the nozzle zone temperature to reduce melt viscosity; use a short nozzle design to reduce the runner length where fibers aggregate
Conclusão principal
Long fiber materials have special requirements for nozzle size and structure
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