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Optimization of injection molding process parameters of vertical polypropylene bottle

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Document pages: 9 pages

Abstract: In order to obtain the best combination of process parameters for vertical polypropylene bottle injection molding, the bottle model was drawn by UG, a module 16 cavity injection molding system was established, and it was analyzed by Moldflow. In order to fill and maintain the pressure in the process of infusion bottle injection molding, an orthogonal test table L25 () for infusion bottle injection molding is designed by CAE. The six parameters of melt temperature, mold temperature, injection pressure, injection time, holding pressure and holding time are taken as the orthogonal test factors. By looking for the best combination of process parameters, the orthogonal test is completed, the range analysis of the test results is carried out, and the influence order of each factor is determinedrocess parameter on each direction of optimization was obtained. The prediction dates of the infusion bottle were gained under various parameters, a comprehensive quality evaluation index of the bottle was formulated, and the multiobjective optimization problem of injection molding process was transformed into a single-objective optimization problem by the integrated weighted score method. The bottle parameters were optimized by analyzing the range date of the weighted scoring method, and the best parameter combination such as melt temperature 200°C, mold temperature 80°C, injection pressure 40 MPa, injection time 2.1 S, dwell pressure 40 MPa, and dwell time 40 S was gained.

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