Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics

2018-01-0149

04/03/2018

Features
Event
WCX World Congress Experience
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2018-01-0149
Pages
8
Citation
Sun, X., Vallury, S., Su, L., Tibbenham, P. et al., "Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics," SAE Technical Paper 2018-01-0149, 2018, https://doi.org/10.4271/2018-01-0149.
Additional Details
Publisher
Published
Apr 3, 2018
Product Code
2018-01-0149
Content Type
Technical Paper
Language
English