This research focuses on the resin viscosity effect coupled with varying the length of the injection chamber on the resin injection pultrusion process. Resin viscosity, an important processing parameter, is taken into account along with injection chamber length in order to achieve complete wetout at a minimum injection pressure and at desirable resin injection chamber exit pressures for the pultrusion manufacturing process. A low resin viscosity yields less resistance to the flow of resin. Conversely, if the viscosity is higher, a high injection pressure is needed to achieve reinforcement wetout. Different viscosity values 500 cP, 750 cP, and 1000 cP (0.50, 0.75, and 1.00 Pa.s, respectively) were simulated with a nominal resin viscosity value of 750 cP (0.75 Pa.s). The computational model developed predicts the optimum location for the injection ports based on the viscosity and injection chamber length.
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