Warpage Prediction on Injection Molded Semi-crystalline Thermoplastics

Paper #:
  • 2018-01-0149

Published:
  • 2018-04-03
Abstract:
Warpage is the distortion induced by inhomogeneous shrinkage during injection molding of plastic parts. The 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 the 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.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Select
Price
List
Download
$22.00
Mail
$22.00
Members save up to 36% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Event
2018-04-10
Training / Education
2009-12-15
Training / Education
2007-03-01
Technical Paper / Journal Article
2011-05-17