Abstract
Plastic injection molding technology is one of the important technologies for the manufacturing industry. In this paper, a numerical dynamic injection molding technology (DIMT) is presented, which is based on the finite element (FE) method. This numerical simulation method introduces a vibrational force into the conventional injection molding technology (CIMT). Some meaningful work has been executed for investigating the mechanical evolution behavior of DIMT. As the basis for illustrating the mechanism in warpage optimization results, dynamic parameter analysis on the rule of pressure response is performed in detail. In the warpage optimization work, three kinds of structure with different molding materials are selected as the comparison. The final warpage of each product is efficiently minimized by using a Gaussian process-based sequential optimization method. From the further discussions, the features of DIMT in improving the molding quality are revealed, indicating that it may not be appropriate for geometrically large structures. This study has significant meaning for the actual injection molding industry.
Highlights
Plastic injection molding technology has been regarded as one of the most important technologies for rapid, efficient manufacturing
As the amplitude increases, the mean pressure decreases for each one of the investigating frequency simulations. This indicates that the melt flows much easier under dynamic injection molding technology (DIMT) than conventional injection molding technology (CIMT), and more energy is saved for manufacturing the product
The purpose is to minimize the warpage of thin-walled products and argue the actual effect of DIMT compared with CIMT
Summary
Plastic injection molding technology has been regarded as one of the most important technologies for rapid, efficient manufacturing. The level of molding defects, like warpage or shrinkage magnitude, length of weld line, etc., are associated with this complicated thermal and mechanical history It has attracted researchers’ attention to investigate the thermal and mechanical behavior in the injection molding process, and relevant process optimization methods to improve the molding quality for a long time. There is a lack of literature on DIMT from a simulation point of view to investigate the thermal and mechanical evolution history, revealing a mechanism for improving the molding quality of plastic products. Pressure response analysis is performed in order to discuss the influence of dynamic parameters on the pressure field This can help us to realize the mechanical evolution rules and clarify the mechanism for improving the molding quality. Flow Analysis Computation Method of Dynamic Injection Molding Technology (DIMT)
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