Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics University of Michigan

Format:

Conference/Event

Author/Creator:

Sun, Sun, author.

Contributor:

Kang, Hong-Tae

Su, Lingxuan

Su, Xuming

Tibbenham, Patricia

Vallury, Srikar

Yang, Anthony

Zeng, Danielle

Conference Name:

WCX World Congress Experience (2018-04-10 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2018

Summary:

AbstractWarpage 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

Notes:

Vendor supplied data

Publisher Number:

2018-01-0149

Access Restriction:

Restricted for use by site license