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Characterizing ultrasonic micro-molding process of polyetheretherketone (PEEK) / Tomasz Dorf in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 4 (08/2018)
[article]
Titre : Characterizing ultrasonic micro-molding process of polyetheretherketone (PEEK) Type de document : texte imprimé Auteurs : Tomasz Dorf, Auteur ; I. Ferrer, Auteur ; Joaquim Ciurana, Auteur Année de publication : 2018 Article en page(s) : p. 442-452 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection assisté par ultrasons
Matières plastiques -- Moulage par micro-injection
Matières plastiques -- Propriétés mécaniques
Mesure
Polyéther éther cétoneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Ultrasonic micro-molding technology can dispense, melt and inject as small an amount of polymer as is required for one cycle, an advantage which makes the process highly desirable for low-volume and customized production of micro parts made from sensitive and very expensive polymers, especially in the medical sector. In this study, the feasibility of processing the polyetheretherketone (PEEK) polymer was investigated. The experiments conducted determined the parameters of a process that would allow parts with specific mechanical properties to be produced and verified as not degraded. The development of the process used three amplitude values as well as varying plunger velocity and vibration times. The three amplitude values and four speed values were tested to determine appropriate parameters for the ultrasonic process. Completely filled samples without any visual signs of degradation were analysed using FTIR-ATR, crystallinity percentage and tensile strength tests. Results show that the amplitude parameter is an important factor in the ultrasonic process and the higher its value is, the better the mechanical properties of complete parts are. Moreover, the tensile strength value of the specimens fabricated by ultrasonic micro-molding is comparable to that of conventional injection molding technology. Note de contenu : - EXPERIMENTAL SET-UP : Processing material - machine and equipment - Ultrasonic micro-molding process - Specimen manufacturing process - Part analysis and measurements
- RESULTS : Visual analysis of specimens - Degradation - Crystallinity - Tensile strengthDOI : 10.3139/217.3428 En ligne : https://drive.google.com/file/d/1sW6S0qJj6EtfYyAc-yxUudqb_iXOIRbG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30883
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 4 (08/2018) . - p. 442-452[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20077 - Périodique Bibliothèque principale Documentaires Disponible Polymer flow behavior analysis based on physical visualization technologo for ultrasonic vibration-assisted injection molding / K.-Y. Jiang in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 3 (07/2017)
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Titre : Polymer flow behavior analysis based on physical visualization technologo for ultrasonic vibration-assisted injection molding Type de document : texte imprimé Auteurs : K.-Y. Jiang, Auteur ; Z. Ji, Auteur ; H. Li, Auteur ; M.-J. Wang, Auteur ; T.-M. Yu, Auteur Année de publication : 2017 Article en page(s) : p. 290-297 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection assisté par ultrasons
Polypropylène
RhéologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : To understand the flow behavior of a melted polymer during injection molding with ultrasonic vibration, a new visualization device was developed and a method was proposed to analyze the filling velocity field during the injection molding process. Using the device and method, both the influence of ultrasonic vibration on the velocity of the filling front and the velocity distribution of a polypropylene melt within a cavity are discussed. The results showed that the filling front velocity of the melt was improved by ultrasonic vibration (the filling front velocity was improved by up to 27% when 200 W of ultrasonic power was applied). In addition, it was shown that the velocity gradient of the melt within the cavity decreased, and that the velocity distribution became more uniform during ultrasonic vibration. Note de contenu : - EXPERIMENTAL : Materials - Experimental facility - Experimental parameters
- RESULTS AND DISCUSSION : Analyzing methods - Melt front flow behavior - Melt flow behavior in a cavityDOI : 10.3139/217.3183 En ligne : https://drive.google.com/file/d/1P57EOCT6NhREbV3YJszHcpfbdtcdEm-V/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28829
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 290-297[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19064 - Périodique Bibliothèque principale Documentaires Disponible