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A special process that is becoming a sustainable normal case / Clemens Kastner in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2021)
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Titre : A special process that is becoming a sustainable normal case : New developments in thermoplastic foam injection molding Type de document : texte imprimé Auteurs : Clemens Kastner, Auteur ; Wolfgang Kienzl, Auteur ; Eva Kobler, Auteur ; Georg Steinbichler, Auteur Année de publication : 2021 Article en page(s) : p. 34-37 Langues : Anglais (eng) Catégories : Intelligence artificielle
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Mousses plastiques -- Moulage par injection
Thermoplastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Lightweight parts, energy-saving processing or the practice of combining several process steps into one can all be subsumed under one current buzzword: sustainability. A technology that is highly promising in this regard is thermoplastic foam injection molding. Although in use for decades, the process offers great potential thanks to continuous development work. Note de contenu : - Minimized warpage, improved shape accuracy
- Exploiting potential with high-efficiency
- Own-developed plasticizing screw
- New method for determining the solubility limit
- A widespread misconception
- Foaming with artificial intelligence
- Figure : In physical foam injection molding, a blowing gas is injected into the polymer melt during plasticizing
- Fig. 1 : The geometry of the PFS improves the homogeneity of the gas-containing melt
- Fig. 2 : Result of the theoretical preparatory work: with increasing gas content in the polymer melt, there is a reduction in the bulk modulus of the mixture. A possible solubility limit cannot be described
- Fig. 3 : Example of a bulk modulus measurement: the deflection in the curve indicates that a solubility limit has been reached and ultrasound measurements during injection for verification
- Fig. 4 : Use of the bulk modulus method for backpressure reduction when using 0.6 % nitrogen : the decrease of bulk modulus when the backpressures are too low can be seen anjd ultrasound measurements during injection for verification
- Fig. 5 : Artificial intelligence is making inroads into foam injection molding: schematic view of the convolutional neural network and its output for parameter adjustmentEn ligne : https://drive.google.com/file/d/1ckup_syz9vOlOQW_bkXXb5EO6MjrgEgG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35496
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 2 (2021) . - p. 34-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22591 - Périodique Bibliothèque principale Documentaires Disponible Study of microcellular injection molding with expandable thermoplastic microsphere / J. Peng in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 3 (07/2011)
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Titre : Study of microcellular injection molding with expandable thermoplastic microsphere Type de document : texte imprimé Auteurs : J. Peng, Auteur ; E. Yu, Auteur ; X. Sun, Auteur ; Lih-Sheng Turng, Auteur ; X. F. Peng, Auteur Année de publication : 2011 Article en page(s) : p. 249-255 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection d'expansion
Microscopie électronique à balayage
Microsphères
Polyéthylène basse densité
Polypropylène
Polystyrène
Thermoplastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Injection molding with expandable thermoplastic microspheres (ETM) containing blowing chemicals is capable of fabricating lightweight, dimensionally stable plastic parts while using less material. This paper presents the study of microcellular injection molding of low density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS) parts with various ETM contents. It was found that the molded parts exhibit relatively better surface quality than conventional foamed parts. The microcellular morphology and cell density of the fractured crosssectional surfaces were characterized using a scanning electron microscope (SEM). As reflected by the testing results, the cell microstructure – such as cell size, cell density, and a layered structure with a foamed core sandwiched by skin layers – play an important role in the weight reduction, surface quality, and mechanical properties. A smaller cell diameter and a thicker skin layer help to improve the surface quality and tensile properties of the injection molded parts with ETM. Finally, an appropriate ETM content has a positive effect on cell microstructure and weight reduction, whereas too high a concentration of microspheres adversely affects the tensile properties and surface quality. DOI : 10.3139/217.2434 En ligne : https://drive.google.com/file/d/15GGYsBMbgCOwpz-kDlc5hH3SkgDhu02q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12403
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 3 (07/2011) . - p. 249-255[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013159 - Périodique Bibliothèque principale Documentaires Disponible The hot runner - A customizable injection unit / Hans-Jörg Schreyer in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 11 (11/2011)
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Titre : The hot runner - A customizable injection unit Type de document : texte imprimé Auteurs : Hans-Jörg Schreyer, Auteur Année de publication : 2011 Article en page(s) : p. 16-19 Langues : Anglais (eng) Catégories : Canaux chauffants
Thermoplastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Injection Molding - As injection molded thermoplastic parts become ever more diverse and complex, hot runner solutions which have been tailored to the parts and the material processed are rendering mass production more feasible and more economical. Note de contenu : - Compact size with many advantages
- Structured system design simplifies maintenance
- Designed for heavy duty service and a long life
- Made for quick color changes
- Individual control over melt pressure in the hot runnerPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13165
in KUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 11 (11/2011) . - p. 16-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13462 - Périodique Bibliothèque principale Documentaires Disponible