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Polymers 2017, 9(3), 85; doi:10.3390/polym9030085

Pressure Analysis of Dynamic Injection Molding and Process Parameter Optimization for Reducing Warpage of Injection Molded Products

1
School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China
2
Department of Engineering Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China
3
National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou 450001, China
*
Author to whom correspondence should be addressed.
Academic Editors: Sofiane Guessasma and Patrick Ilg
Received: 19 October 2016 / Revised: 24 January 2017 / Accepted: 23 February 2017 / Published: 7 March 2017
(This article belongs to the Special Issue Computational Modeling and Simulation in Polymer)
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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. View Full-Text
Keywords: dynamic injection molding; warpage optimization; pressure response analysis; kriging model; EGO method dynamic injection molding; warpage optimization; pressure response analysis; kriging model; EGO method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, X.; Li, H.; Gu, J.; Li, Z.; Ruan, S.; Shen, C.; Wang, M. Pressure Analysis of Dynamic Injection Molding and Process Parameter Optimization for Reducing Warpage of Injection Molded Products. Polymers 2017, 9, 85.

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