Warpage is the distortion induced by inhomogeneous shrinkage during injection molding of plastic parts. Uncontrolled warpage will result in dimensional instability and bring a lot of challenges to the mold design and part assembly. Current commercial simulation software for injection molding cannot provide consistently accurate warpage prediction, especially for semi-crystalline thermoplastics. In this study, the root cause of inconsistency in warpage prediction has been investigated by using injection molded polypropylene plaques with a wide range of process conditions. The warpage of injection molded plaques are measured and compared to the numerical predictions from Moldex3D. The study shows that with considering cooling rate effect on crystallization kinetics and using of the improved material model for residual stress calculations, good agreements are obtained between experiment and simulation results. This study also shows that the accurate parameter characterization for the material model plays a critical role in improving the prediction accuracy.


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    Titel :

    Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Yang, Anthony (Autor:in) / Zeng, Danielle (Autor:in) / Kang, Hong-Tae (Autor:in) / Su, Lingxuan (Autor:in) / Tibbenham, Patricia (Autor:in) / Vallury, Srikar (Autor:in) / Sun, Xianjun (Autor:in) / Su, Xuming (Autor:in)

    Kongress:

    WCX World Congress Experience ; 2018



    Erscheinungsdatum :

    03.04.2018




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics

    Sun, Xianjun / Vallury, Srikar / Su, Lingxuan et al. | British Library Conference Proceedings | 2018


    Shrinkage and warpage analysis of plastic injection molded parts

    Beaumont,J.P. / Moldflow,US | Kraftfahrwesen | 1989


    Shrinkage and Warpage Analysis of Plastic Injection Molded Parts

    Beaumont, John P. | SAE Technical Papers | 1989



    Press Molded Thermoplastics

    Hinson,, Layton L. | SAE Technical Papers | 1983