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Demoulding process assessment of elastomers in micro-textured moulds

Background: Micro-texturing is an increasingly used technique that aims at improving the functional behaviour of components during their useful life, and it is applied in different industrial manufacturing processes for different purposes, such as reducing friction on dynamic rubber seals for pneuma...

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Autores principales: Liarte, Elias, Zambrano, Valentina, A. Gracia, Leticia, Amor, José Ignacio, Borro, Marcos, Hernández-Gascón, Belén
Formato: Online Artículo Texto
Lenguaje:English
Publicado: F1000 Research Limited 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10446097/
https://www.ncbi.nlm.nih.gov/pubmed/37645118
http://dx.doi.org/10.12688/openreseurope.13716.2
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author Liarte, Elias
Zambrano, Valentina
A. Gracia, Leticia
Amor, José Ignacio
Borro, Marcos
Hernández-Gascón, Belén
author_facet Liarte, Elias
Zambrano, Valentina
A. Gracia, Leticia
Amor, José Ignacio
Borro, Marcos
Hernández-Gascón, Belén
author_sort Liarte, Elias
collection PubMed
description Background: Micro-texturing is an increasingly used technique that aims at improving the functional behaviour of components during their useful life, and it is applied in different industrial manufacturing processes for different purposes, such as reducing friction on dynamic rubber seals for pneumatic equipment, among others. Micro-texturing is produced on polymer components by transfer from the mould and might critically increase the adhesion and friction between the moulded rubber part with the mould, provoking issues during demoulding, both on the mould itself and on the rubber part. The mould design, the coating release agent applied to the mould surface, and the operational parameters of the moulding/demoulding process, are fundamental aspects to avoid problems and guarantee a correct texture transfer during the demoulding process. Methods: In this work, the lack of knowledge about demoulding processes was addressed with an in-house test rig and a robust experimental procedure to measure demoulding forces (DFs) as well as the final quality of the moulded part, between thermoset polymers and moulds. After the characterization of several Sol-Gel coating formulations (inorganic; hybrid) the influence of several parameters was analysed experimentally, i.e.: Sol-Gel efficiency, texture effects, pattern geometry, roughness and material compound. Results: The results obtained from the experimental studies revealed that texture depth is the most critical geometrical parameter, showing high scatter among the selected compounds. Finally, the experimental results were used to compute a model through reduced order modelling (ROM) technique for the prediction of DFs. Conclusions: The characterization of DFs in a laboratory, with a specific device operated by a universal testing machine (UTM), provided valuable information that allows a fast and optimized introduction of texturing in rubber components. Selection of a novel Sol-Gel coating and the use of the ROM technique contributed to speed up implementation for mass production.
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spelling pubmed-104460972023-08-29 Demoulding process assessment of elastomers in micro-textured moulds Liarte, Elias Zambrano, Valentina A. Gracia, Leticia Amor, José Ignacio Borro, Marcos Hernández-Gascón, Belén Open Res Eur Research Article Background: Micro-texturing is an increasingly used technique that aims at improving the functional behaviour of components during their useful life, and it is applied in different industrial manufacturing processes for different purposes, such as reducing friction on dynamic rubber seals for pneumatic equipment, among others. Micro-texturing is produced on polymer components by transfer from the mould and might critically increase the adhesion and friction between the moulded rubber part with the mould, provoking issues during demoulding, both on the mould itself and on the rubber part. The mould design, the coating release agent applied to the mould surface, and the operational parameters of the moulding/demoulding process, are fundamental aspects to avoid problems and guarantee a correct texture transfer during the demoulding process. Methods: In this work, the lack of knowledge about demoulding processes was addressed with an in-house test rig and a robust experimental procedure to measure demoulding forces (DFs) as well as the final quality of the moulded part, between thermoset polymers and moulds. After the characterization of several Sol-Gel coating formulations (inorganic; hybrid) the influence of several parameters was analysed experimentally, i.e.: Sol-Gel efficiency, texture effects, pattern geometry, roughness and material compound. Results: The results obtained from the experimental studies revealed that texture depth is the most critical geometrical parameter, showing high scatter among the selected compounds. Finally, the experimental results were used to compute a model through reduced order modelling (ROM) technique for the prediction of DFs. Conclusions: The characterization of DFs in a laboratory, with a specific device operated by a universal testing machine (UTM), provided valuable information that allows a fast and optimized introduction of texturing in rubber components. Selection of a novel Sol-Gel coating and the use of the ROM technique contributed to speed up implementation for mass production. F1000 Research Limited 2022-02-24 /pmc/articles/PMC10446097/ /pubmed/37645118 http://dx.doi.org/10.12688/openreseurope.13716.2 Text en Copyright: © 2022 Liarte E et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Liarte, Elias
Zambrano, Valentina
A. Gracia, Leticia
Amor, José Ignacio
Borro, Marcos
Hernández-Gascón, Belén
Demoulding process assessment of elastomers in micro-textured moulds
title Demoulding process assessment of elastomers in micro-textured moulds
title_full Demoulding process assessment of elastomers in micro-textured moulds
title_fullStr Demoulding process assessment of elastomers in micro-textured moulds
title_full_unstemmed Demoulding process assessment of elastomers in micro-textured moulds
title_short Demoulding process assessment of elastomers in micro-textured moulds
title_sort demoulding process assessment of elastomers in micro-textured moulds
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10446097/
https://www.ncbi.nlm.nih.gov/pubmed/37645118
http://dx.doi.org/10.12688/openreseurope.13716.2
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