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Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding

PVC injection molding has constrained temperature and shear rate owing to its temperature sensitivity and high viscosity, as well as its low conductivity. Many challenges are associated with the PVC injection molding process used for producing PVC fittings with a multi-cavity mold. Once filling imba...

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Autores principales: Tsai, Hsi-Hsun, Wu, Shao-Jung, Liu, Jia-Wei, Chen, Sin-He, Lin, Jui-Jung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459958/
https://www.ncbi.nlm.nih.gov/pubmed/36080557
http://dx.doi.org/10.3390/polym14173483
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author Tsai, Hsi-Hsun
Wu, Shao-Jung
Liu, Jia-Wei
Chen, Sin-He
Lin, Jui-Jung
author_facet Tsai, Hsi-Hsun
Wu, Shao-Jung
Liu, Jia-Wei
Chen, Sin-He
Lin, Jui-Jung
author_sort Tsai, Hsi-Hsun
collection PubMed
description PVC injection molding has constrained temperature and shear rate owing to its temperature sensitivity and high viscosity, as well as its low conductivity. Many challenges are associated with the PVC injection molding process used for producing PVC fittings with a multi-cavity mold. Once filling imbalance occurs, the gates and/or runner of the mold should be changed by machine tools, which is time- and cost-intensive. Using Moldex3D and the Taguchi method, this study reveals an approach to eliminate imbalanced filling of multi-cavity molds for PVC injection molding. The injection rate optimization of the filling stage is successfully verified to reduce the imbalance. Furthermore, the temperatures of the molded PVC fittings are only slightly increased by the change in injection rate. The temperatures of fittings in the filling and packing are lower than the degradation temperature of PVC. This approach may help technicians to obtain pilot-run samples for the optimization of molding parameters and ensure degradation-free PVC molding.
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spelling pubmed-94599582022-09-10 Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding Tsai, Hsi-Hsun Wu, Shao-Jung Liu, Jia-Wei Chen, Sin-He Lin, Jui-Jung Polymers (Basel) Article PVC injection molding has constrained temperature and shear rate owing to its temperature sensitivity and high viscosity, as well as its low conductivity. Many challenges are associated with the PVC injection molding process used for producing PVC fittings with a multi-cavity mold. Once filling imbalance occurs, the gates and/or runner of the mold should be changed by machine tools, which is time- and cost-intensive. Using Moldex3D and the Taguchi method, this study reveals an approach to eliminate imbalanced filling of multi-cavity molds for PVC injection molding. The injection rate optimization of the filling stage is successfully verified to reduce the imbalance. Furthermore, the temperatures of the molded PVC fittings are only slightly increased by the change in injection rate. The temperatures of fittings in the filling and packing are lower than the degradation temperature of PVC. This approach may help technicians to obtain pilot-run samples for the optimization of molding parameters and ensure degradation-free PVC molding. MDPI 2022-08-25 /pmc/articles/PMC9459958/ /pubmed/36080557 http://dx.doi.org/10.3390/polym14173483 Text en © 2022 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
Tsai, Hsi-Hsun
Wu, Shao-Jung
Liu, Jia-Wei
Chen, Sin-He
Lin, Jui-Jung
Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title_full Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title_fullStr Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title_full_unstemmed Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title_short Filling-Balance-Oriented Parameters for Multi-Cavity Molds in Polyvinyl Chloride Injection Molding
title_sort filling-balance-oriented parameters for multi-cavity molds in polyvinyl chloride injection molding
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459958/
https://www.ncbi.nlm.nih.gov/pubmed/36080557
http://dx.doi.org/10.3390/polym14173483
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