Modeling of heat transfer in rotational molding
Article
Article Title | Modeling of heat transfer in rotational molding |
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ERA Journal ID | 1692 |
Article Category | Article |
Authors | Banerjee, S. (Author), Yan, W. (Author) and Bhattacharyya, D. (Author) |
Journal Title | Polymer Engineering and Science |
Journal Citation | 48 (11), pp. 2188-2197 |
Number of Pages | 10 |
Year | 2008 |
Publisher | John Wiley & Sons |
Place of Publication | United States |
ISSN | 0032-3888 |
1548-2634 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/pen.21164 |
Web Address (URL) | https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/pen.21164 |
Abstract | Rotational molding is a process for manufacturing hollow or open-sided plastic products using a rotating mold subjected to heating and then cooling. The process is attractive for the production of stress-free objects at a competitive cost. In this article, a modified model for heat transfer in rotational molding is proposed, which assumes that the heat transfer at the mold-powder interface is because of convection, whereas the powder particles are heated up by conduction. Heat transfer through the mold-air contact is also included. A source-based formulation is used for modeling the layer-by-layer nonisothermal deposition of plastic. The reduced heat transfer due to warpage is calculated by using a modified heat transfer coefficient. Good overall agreement is found between the cycle times as predicted by the model and the experimental data. The model is then used for calculating the cycle time for particulate composites, based on their effective properties. A reduction in the cycle time is observed in the case of reinforced composites. This is attributed to the increase in thermal conductivity of the particulate composites and the reduced mass fraction of the polymer. Numerical calculations of the cycle time for the glass-bead reinforced composites are found to be in good agreement with the experimental results. |
Keywords | carbon fiber reinforced plastics; conducting polymers; forming; heat exchangers; heat transfer; heating equipment; molding; molds; numerical analysis; plastic molds; plastic products; polymer matrix composites; polymeric glass; powders; thermoanalysis; thermoelectricity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401408. Manufacturing processes and technologies (excl. textiles) |
401205. Experimental methods in fluid flow, heat and mass transfer | |
401609. Polymers and plastics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Auckland, New Zealand |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2vq1/modeling-of-heat-transfer-in-rotational-molding
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