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Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency
Polymers with highly conductive fillers could possibly replace standardly used materials, such as aluminum and copper alloys, for passive cooling purposes. The main problem of the composite polymer-based heat sinks is that their high thermal conductivity is uneven. The orientation of this anisotropy...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8067716/ https://www.ncbi.nlm.nih.gov/pubmed/33917050 http://dx.doi.org/10.3390/polym13081186 |
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author | Guzej, Michal Zachar, Martin Kominek, Jan Kotrbacek, Petr Brachna, Robert |
author_facet | Guzej, Michal Zachar, Martin Kominek, Jan Kotrbacek, Petr Brachna, Robert |
author_sort | Guzej, Michal |
collection | PubMed |
description | Polymers with highly conductive fillers could possibly replace standardly used materials, such as aluminum and copper alloys, for passive cooling purposes. The main problem of the composite polymer-based heat sinks is that their high thermal conductivity is uneven. The orientation of this anisotropy is set according to the position of the highly thermally conductive filler. Its orientation is influenced by the melt flow during the polymer heat sink molding process. This article shows that change of the melt flow inside the mold cavity can improve the overall cooling efficiency of a polymer heat sink, which leads to lower temperatures on the heat source used. Two polymer heat sinks of identical geometries were produced. Their high thermal conductivity was given by the use of graphite flakes as the filler. The only difference between the heat sinks was in the position of the fan gate during their production. Different temperatures of the heat source between the two heat sinks were observed for the same measurement conditions. The measurements were conducted at Heatlab, BUT. |
format | Online Article Text |
id | pubmed-8067716 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80677162021-04-25 Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency Guzej, Michal Zachar, Martin Kominek, Jan Kotrbacek, Petr Brachna, Robert Polymers (Basel) Article Polymers with highly conductive fillers could possibly replace standardly used materials, such as aluminum and copper alloys, for passive cooling purposes. The main problem of the composite polymer-based heat sinks is that their high thermal conductivity is uneven. The orientation of this anisotropy is set according to the position of the highly thermally conductive filler. Its orientation is influenced by the melt flow during the polymer heat sink molding process. This article shows that change of the melt flow inside the mold cavity can improve the overall cooling efficiency of a polymer heat sink, which leads to lower temperatures on the heat source used. Two polymer heat sinks of identical geometries were produced. Their high thermal conductivity was given by the use of graphite flakes as the filler. The only difference between the heat sinks was in the position of the fan gate during their production. Different temperatures of the heat source between the two heat sinks were observed for the same measurement conditions. The measurements were conducted at Heatlab, BUT. MDPI 2021-04-07 /pmc/articles/PMC8067716/ /pubmed/33917050 http://dx.doi.org/10.3390/polym13081186 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Guzej, Michal Zachar, Martin Kominek, Jan Kotrbacek, Petr Brachna, Robert Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title | Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title_full | Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title_fullStr | Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title_full_unstemmed | Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title_short | Importance of Melt Flow Direction during Injection Molding on Polymer Heat Sinks’ Cooling Efficiency |
title_sort | importance of melt flow direction during injection molding on polymer heat sinks’ cooling efficiency |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8067716/ https://www.ncbi.nlm.nih.gov/pubmed/33917050 http://dx.doi.org/10.3390/polym13081186 |
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