Introducción
Las máquinas de cribado, clasificadores y sistemas de desempolvado para pellets de plástico son tecnologías de separación post-peletizado utilizadas para eliminar partículas de tamaño excesivo, finos, polvo, streamers y otros contaminantes de los gránulos de polímero antes del envasado, transporte, almacenamiento o procesamiento posterior. En la producción moderna de plásticos, estas máquinas son fundamentales para la consistencia del producto, la protección de las máquinas y el aseguramiento de la calidad, especialmente en líneas de resina virgen, compounding, reciclaje y masterbatch.
Aunque la terminología varía según el proveedor y la función del proceso, la familia de equipos generalmente incluye cribadoras mecánicas de pellets para separación por tamaño, clasificadores para una clasificación más precisa en una o más fracciones de tamaño, y desempolvadores o separadores por aire para eliminar polvo fino y contaminantes ligeros. Algunos sistemas combinan varias funciones en una sola máquina, como secado, enfriamiento, dimensionamiento y desempolvado.
La tecnología ha evolucionado desde simples cribas vibratorias hasta sistemas giratorios altamente diseñados, vibratorios circulares, asistidos por aire y neutralizadores electrostáticos diseñados específicamente para pellets de plástico. El desarrollo reciente se ha centrado en mayor rendimiento, manipulación más suave, menor consumo de energía, cambio de cribas más fácil y mejor eliminación de polvo ultrafino, incluyendo por debajo de 100 micras en sistemas avanzados de desempolvado.
Historia y desarrollo
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Referencias
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