REDUCCIÓN DEL TIEMPO DE CICLO EN UN MOLDE DE INYECCIÓN DE PLÁSTICOS IMPLEMENTANDO SISTEMAS DE ENFRIAMIENTO CON SECCIÓN TRANSVERSAL CIRCULAR Y RECTANGULAR (CYCLE TIME REDUCTION IN A PLASTIC INJECTION MOLD BY IMPLEMENTING COOLING SYSTEMS WITH CIRCULAR AND RECTANGULAR CROSS SECTION)
Resumen
El presente artículo muestra la importancia del diseño de los canales de enfriamiento del molde para obtener una reducción en el tiempo total del ciclo de inyección, mediante una comparación entre cuatro tipos diferentes de sistemas de enfriamiento. Dos con sección transversal circular, uno con canal recto (tipo I), y el otro canal sigue la trayectoria de la pieza moldeada (tipo II). En los dos restantes se propone un cambio en la sección transversal, uno con sección cuadrada y otro con sección rectangular, en ambos la distancia es la misma entre los canales de enfriamiento y la superficie de la cavidad del molde. La pieza moldeada presenta una geometría con curvaturas suaves para tener un cierto grado de complejidad. Los resultados muestran que el diseño del canal circular tipo II, reduce el tiempo de ciclo, presenta flujo de calor uniforme y la pieza inyectada presenta contracción volumétrica uniforme.
Palabra(s) Clave(s): Canales, Conductividad, Inyección, Molde, Tiempo.
Abstract
The importance of the design of cooling channels to obtain a good quality in the molded part with a reduced cycle time is presented in this work by comparing among 4 types of cooling channels. Two of them with circular cross-section, one of these with straight channels (type I), and the other with the channels that follows the path of the molded part (type II). The last two have square and rectangular cross section each one, both with the same distance between the cooling channels and the surface of the mold cavity. The mold presents a geometry with smooth curvatures to introduce some complexity. The results show that the type II circular channel design, reduces the cycle time, have a uniform heat flow and the injected part presents uniform volumetric contraction.
Keyboards: Channels, Conductivity, Injection, Mold, Time.
Texto completo:
1743-1757 PDFReferencias
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