Amazingly thin / Georg Steinbichler in KUNSTSTOFFE PLAST EUROPE, Vol. 94, N° 12/2004 (12/2004)

[article]  inKUNSTSTOFFE PLAST EUROPE > Vol. 94, N° 12/2004 (12/2004) . - p. 126-134 Titre : Amazingly thin : Expansion injection moulding Type de document : texte imprimé Auteurs : Georg Steinbichler, Auteur ; Alfred Lampl, Auteur ; Andreas Pöttler, Auteur Année de publication : 2005 Article en page(s) : p. 126-134 Note générale : bibliogr. Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : According to the state of the art, thin-wall injection moulding requires the injection unit to be supported by a hydraulic accumulator. But without a hydraulic accumulator greater precision is achieved in the process technology, energy consumption is lower and amazingly thin walls can be produced. The new state of the art is called "X-Melt", the expansion injection moulding process developed by Engel. It is all made possible by the ability to exert full control over the thermoplastic melt. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7612 [article]

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An experimental validation of diffusion-based devolatilization models in extruders using post-industrial and post-consumer plastic waste / Chi Nghia Chung in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 4 (2024)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 39, N° 4 (2024) . - p. 453-464 Titre : An experimental validation of diffusion-based devolatilization models in extruders using post-industrial and post-consumer plastic waste Type de document : texte imprimé Auteurs : Chi Nghia Chung, Auteur ; Christian Marschik, Auteur ; Mohamad Hassan Akhras, Auteur ; Thomas Höftberger, Auteur ; Christoph Burgstaller, Auteur ; Georg Steinbichler, Auteur Année de publication : 2024 Article en page(s) : p. 453-464 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dégazage Matières plastiques -- Extrusion:Polymères -- Extrusion Matières plastiques -- Recyclage Modèles mathématiques Recyclage mécanique Index. décimale : 668.4 Plastiques, vinyles Résumé : Extrusion is a key process in mechanical recycling. In a degassing step, volatile components, including all impurities and moisture, are removed from a polymer melt to ensure consistently high quality of the recyclates. Predicting devolatilization performance is therefore of interest in the design of degassing screws; in the plastics industry, it also plays an important role in the transition from a linear to a circular economy. Using two different devolatilization models, we first modelled the degassing process of a lab-scale twin-screw extruder and an industrial-scale recycling single-screw extruder. We then predicted the devolatilization performance of both machines, validated the results with experimental data obtained from emissions tests carried out with post-industrial and post-consumer polypropylene materials and performed linear regression analysis to compare our two models in terms of predictive quality. Our results showed that both models are equally suitable for reliable prediction of the devolatilization performance. Note de contenu : - MODELLING : - Devolatilization model 1 - Devolatilization model 2 - Model comparison - EXPERIMENTAL : - Material - Emissions tests on a twin-screw extruder - Emissions tests on a single-screw recycling extrusion line - RESULTS AND DISCUSSION : - Emissions tests on a twin-screw extruder - Emissions tests on a single-screw recycling extrusion line - Table 1 : Process settings in the twin-screw extrusion experiments - Table 2 : Process settings in the recycling extrusion experiments DOI : https://doi.org/10.1515/ipp-2024-0011 En ligne : https://drive.google.com/file/d/17S06-RK3KECy2nTskMa68nFxnIW2qdW2/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41627 [article]

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Better part properties thanks to fewer fiber breakage / Thomas Köpplmayr in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 1-2 (01-02/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 1-2 (01-02/2019) . - p. 20-22 Titre : Better part properties thanks to fewer fiber breakage : Plastification system optimized for processing long glass fiber materials Type de document : texte imprimé Auteurs : Thomas Köpplmayr, Auteur ; Georg Steinbichler, Auteur Année de publication : 2019 Article en page(s) : p. 20-22 Langues : Anglais (eng) Catégories : Composites à fibres de verre Composites à fibres longues Matières plastiques -- Moulage par injection Matières plastiques dans les automobiles Plastification Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Long glass-fiber-reinforced polypropylene and polyamide are used in automotive lightweight construction especially where high impact toughness, very good crash behavior and low weight are required. However, care must be taken during injection molding, since not every screw is suitable for these materials. To maintain the fiber length reliably and obtain a uniform distribution of the fibers, Engel has developed a new plastification system especially for processing long glass-fiber-reinforced materials. Note de contenu : - A screw for different materials - Comparison of the different screw concepts - Loading of the fibers in the melt - Figure : The greater channel depth in the feed zone prevents feeding problems with the rod-shaped pellets - Fig. 1 : With the standard screw without LGF mixing head, the average fiber length is greatest, however with a low back pressure of 10 bar, fiber bundles are clearly visible. With the new LFS and 10 bar back pressure, the measured fiber lengths are somewhat higher than with the standard screw and 100 bar. Note: the distribution curve is a distribution of different fiber lengths and not a spot measurement - Fig. 2 : High flowability (low viscosity) results in lower fiber length reduction (less friction). The standard screw with LGF mixing head and the new LFS yield comparable fiber lengths. All trials were performed at 10 bar holding pressure - Fig. 3 : The plastification performances are greatest with the newly developed LFS. For the same cycle time, it offers the advantage of a lower rotational speed and therefore also less fiber size reduction. The trials were performed with screws with a diameter of 90 mm in each case En ligne : https://drive.google.com/file/d/1yRcDDgZWP6io1n856yicnT9GbimaFirm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31811 [article]

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Breathing exercises for process optimization / Georg Pillwein in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 10 (10/2015)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 105, N° 10 (10/2015) . - p. 81-84 Titre : Breathing exercises for process optimization : Software determines the required clamping force based on mold breathing Type de document : texte imprimé Auteurs : Georg Pillwein, Auteur ; Johannes Lettner, Auteur ; Josef Giessauf, Auteur ; Georg Steinbichler, Auteur Année de publication : 2015 Article en page(s) : p. 81-84 Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : Self adapting, decentralized systems improve process capability and product quality and are an important component in the smart factory, which is the focus of Engel’s "inject 4.0" program. In the form of "iQ clamp control", injection molding machine manufacturer Engel is presenting a new software tool at Fakuma 2015 that automatically determines the optimum clamping force for each mold based on mold breathing. Note de contenu : - A new member of the family - New process signal without additional hardware - Clamping force optimization-automatic and objective - Setting component properties in a targeted way mold breathing En ligne : https://drive.google.com/file/d/1ahlkHJ3z2FdXAO8dKSK4FJsEaNHNRKsq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24870 [article]

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Controlled closing, highly constant shot weight / Markus Schmied in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 8 (08/2013)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 8 (08/2013) . - p. 56-58 Titre : Controlled closing, highly constant shot weight Type de document : texte imprimé Auteurs : Markus Schmied, Auteur ; Erich Hochreiter, Auteur ; Georg Steinbichler, Auteur Année de publication : 2013 Article en page(s) : p. 56-58 Langues : Anglais (eng) Catégories : Buse (tuyère) Clapet anti retour Matières plastiques -- Moulage par injection -- Appareils et matériel Index. décimale : 668.4 Plastiques, vinyles Résumé : Non-return valves - Though electric injection units execute all movements precisely and reproducibly, the fact that non-return valves cannot be controlled directly still leads to variations in the amount of melt injected. A new positively closing valve allows these weight variations to be minimized by controlled valve closure before injection. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22942 [article]

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Controlled reactivity / Norbert Müller in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 10 (10/2016)  

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Efficient production of thick-walled parts / Christian Maier in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)

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Giving pressure greater weight / Klaus Straka in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 8 (08/2015)  

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High quality interior components at low unit cost / Wolfgang Kienzl in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 12 (12/2016)  

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Large car windows from an injection moulding machine / Josef Gießauf in KUNSTSTOFFE PLAST EUROPE, Vol. 94, N° 10/2004 (10/2004)

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Layer-for-layer precision plus high performance / Norbert Müller in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 3 (03/2017)  

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Less granules stock means more quality / Georg Steinbichler in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 7 (2020)  

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Leveraging hidden potential / Florian Raschke in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 11 (11/2012)

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Measuring melt temperature with ultrasound metrology / Bernhard Praher in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 7 (07/2013)

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More gloss, less weld lines / Gerald Berger in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 7 (07/2011)

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New "high-speed" for thin-wall part / Hans Wobbe in KUNSTSTOFFE PLAST EUROPE, Vol. 95, N° 9/2005 (09/2005)

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Numbers that count / Josef Giessauf in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 9 (09/2017)  

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Opening up a broader range of applications for recyclate / Georg Pillwein in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 4 (2020)  

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Outgrowing experimental status / Peter Egger in KUNSTSTOFFE PLAST EUROPE, Vol. 94, N° 9/2004 (09/2004)

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Parts geometry at a grasp / Michael Stricker in KUNSTSTOFFE INTERNATIONAL, Vol. 100, N° 4/2010 (04/2010)

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