Warpage Prediction on Injection Molded Semi-Crystalline Thermoplastics
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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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Sun, Xianjun
- Vallury, Srikar
- Su, Lingxuan
- Tibbenham, Patricia
- Kang, Hong-Tae
- Yang, Anthony
- Su, Xuming
- Zeng, Danielle
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Conference:
- WCX World Congress Experience
- Location: Detroit Michigan, United States
- Date: 2018-4-10 to 2018-4-12
- Publication Date: 2018-4-3
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Automotive materials; Injection molding; Mathematical prediction; Polypropylene; Simulation; Thermoplastic materials; Vehicle components; Warpage
- Subject Areas: Highways; Materials; Vehicles and Equipment;
Filing Info
- Accession Number: 01690005
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2018-01-0149
- Files: TRIS, SAE
- Created Date: Dec 27 2018 11:00AM