This paper concerns non-isothermal flow in a thermoset resin-injection pultrusion process. Supported by temperature measurements from an industrial pultrusion line and a material characterisation study (curing kinetics, chemorheology, and permeability), the material flow was analysed for the manufacture of a thick glass-fibre profile saturated with a pultrusion-specific polyurethane resin. A central finding is that the heating configuration, together with the strongly convective flow near inlets resulted in phase transitions that were both concave and convex-shaped. This is different from existing literature that commonly describes curing being initiated from die-walls, resulting in the concave phase-transitions.

本文涉及热固性树脂注射拉挤成型工艺中的非等温流动。在工业拉挤生产线的温度测量和材料表征研究（固化动力学，化学流变学和渗透性）的支持下，分析了材料流，以制造用拉挤专用聚氨酯树脂饱和的厚玻璃纤维型材。一个主要的发现是，加热结构以及入口附近的强对流共同导致了既呈凹形又呈凸形的相变。这与现有文献不同，现有文献通常描述固化是从模具壁开始的，从而导致凹相变。