Injection Molding
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Incomplete color clearing when switching color masterbatch
Fenómeno del problema
After color change, the previous color still remains after multiple injections
Análisis de la causa
Previous color material remains in the screw and barrel; accumulated material in dead zones is not completely removed; purging time is insufficient
Solución
Use high-viscosity purging material of the same matrix for color change; the temperature-difference purging method of heating up then cooling down; disassemble the screw and nozzle for thorough cleaning if necessary
Conclusión clave
Thorough color change is necessary for multi-variety small-batch production
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