Injection Molding
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PET injection machine selection
Fenómeno del problema
Using an ordinary '2079851475616104452 machine to process PET, the temperature control is unstable and product quality fluctuates greatly
Análisis de la causa
PET has a high melting point and a short stability time after the melting point, requiring an injection system with many temperature control zones and little self-friction heat generation; when the shot weight is less than 2/3 of the machine's injection capacity, the melt is retained too long and degrades
Solución
①Select a PET-specific plasticizing system with many temperature control zones; ②the actual weight of the product including the runner is not less than 2/3 of the machine's injection capacity; ③calculate the clamping force at 6300 t/m² or above
Conclusión clave
PET has specific requirements for the '2079851475616104452 machine; the number of temperature control zones and the shot weight ratio are the two major verification items for equipment matching; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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