Modeling Fiber Dispersion During the Plasticizing Process for a Single Screw Extruder

Abstract

[ES] Este estudio trata la dispersión de la fibra durante el proceso de extrusión de termoplásticos reforzados con fibra larga y sus efectos sobre el desgaste de la fibra. Se realizaron experimentos de extracción de tornillo para determinar la dispersión de fibra a lo largo de una extrusora de un solo tornillo utilizando herramientas de procesamiento como PhotoShop y Matlab. El modelo predice la dispersión de fibras debido a las tensiones hidrodinámicas a lo largo de la longitud helicoidal de la geometría del tornillo. El modelo evalúa el uso de LFT en el sector de la automoción

[EN] Long fiber-reinforced thermoplastics are emerging materials due to their excellent mechanical properties. They are being widely used in industries such as automotive, aerospace and construction. Research and recent developments in this field continue to evolve every day. When processing long fiber-reinforced thermoplastics, the length of the fibers starts decreasing, which affects the mechanical performance of the finished part. For this reason, it is important to understand the mechanics of fiber attrition during the extrusion process, resulting in predicting the strength of long fiber-reinforced thermoplastics composites. This study investigates fiber dispersion during the extrusion process of LFT pellets. The kinetics of fiber damage in conjunction with dispersion are explored. A dispersion model and fiber length is then proposed for single screw extruders to predict fiber dispersion. Screw pull-out experiments were performed to determine fiber dispersion along a single screw extruder.