Simulation of crystallization evolution of polyoxymethylene during microinjection molding cycle

Par Conseil national de recherches du Canada

DOI	Trouver le DOI : https://doi.org/10.1002/pat.4819
Auteur	Rechercher : Anass, Benayad; Rechercher : M'hamed, Boutaous; Rechercher : Rabie, El Otmani Identifiant ORCID : https://orcid.org/0000-0002-8181-6233; Rechercher : Abdelhadi, El Hakimi; Rechercher : Abdelhamid, Touache; Rechercher : Musa, Kamal R.; Rechercher : Salim, Derdouri; Rechercher : Zakariaa, Refaa; Rechercher : Siginer, Dennis A.
Format	Texte, Article
Sujet	computer modeling; crystallization kinetics; microinjection molding; morphology; viscous dissipation
Résumé	A mathematical model coupled with a numerical investigation of the evolving material properties due to thermal and flow effects and in particular the evolution of the crystallinity during the full microinjection molding cycle of poly (oxymethylene) POM is presented using a multi-scale approach. A parametric analysis is performed, including all the steps of the process using an asymmetrical stepped contracting part. The velocity and temperature fields are discussed. A parabolic distribution of the velocity across the part thickness, and a temperature rise in the thin zone toward the wall have been obtained. It is attributed to the viscous energy dissipation during the filling phase, but also to the involved characteristic times for the thermal behavior of the material. Depending on the molding conditions and the locations within the micro-part, different evolution of crystallization rates are obtained leading to at least three to five morphological layers, obtained in the same part configuration of a previously work, allowing a clear understanding of the process-material interaction.
Date de publication	2019-12-04
Maison d’édition	Wiley
Dans	Polymers for Advanced Technologies 31, nº 4 : 838–852.
Langue	anglais
Publications évaluées par des pairs	Oui
Publication du CNRC	Cette publication n’est pas du CNRC Ce sont des publications qui ont été rédigées par un auteur du CNRC, mais avant que celui-ci soit employé du CNRC.
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Identificateur de l’enregistrement	c2e27966-6a24-46c6-8735-2527ca6f6d03
Enregistrement créé	2020-07-06
Enregistrement modifié	2020-08-04

Date de modification :: 2024-06-30