Eye-catchers under the hood / Branislav Zlatkov in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 3 (03/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 3 (03/2017) . - p. 32-35 Titre : Eye-catchers under the hood : Optimizing properties and costs in the production of designer engine covers Type de document : texte imprimé Auteurs : Branislav Zlatkov, Auteur ; Daniel Scholz, Auteur ; Alistar James, Auteur ; Bernd Laue, Auteur ; Markus Thurmeier, Auteur ; Dieter Langenfelder, Auteur ; Erik Licht, Auteur ; Mark Nowag, Auteur ; Klaus Klemm, Auteur Année de publication : 2017 Article en page(s) : p. 32-35 Langues : Anglais (eng) Catégories : Cache moteur Composites à fibres de verre Composites à fibres de verre -- Propriétés mécaniques Matières plastiques dans les automobiles Polyamide 6 Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Polypropylene - Visible components in vehicle engine rooms increasingly have to satisfy not just technical requirements, but design expectations, too. An engine cover thus has to have an attractive and distinctive surface. A series part by Volkswagen demonstrates that this is possible not only with polyamide, but with glass-fiber-reinforced polypropylene as well. Note de contenu : - Demands on the plastic - Replacing polyamide reliably - The surface of designer engine covers - Experimental investigation of moldability by injection molding - Less energy during processing - FIGURES : 1. REM images of traditional glass-fiber-reinforced PP compounds exhibit rough and irregular surfaces due to protruding fibers. Since engine coves are now considered visible parts, this has to be avoided - 2. The designer engine cover from a not yet optimized PP compound in delivery condition exhibits clear polymer degradation after 500h thermal aging - TABLES : 1. Results before and after thermal aging of the proposed PP-GF Hostacom ERG 393F Black. The mechanical properties may lie below those of the series material, but are adequate for the case of application - 2. Comparative processing parameters for polyamide and thenewly developed PP-GF type. Among other things, injection pressure, locking force and tempering indicate reduced energy consumption during production En ligne : https://drive.google.com/file/d/1zNnXEKxSRJEl3gwEW9FOLP7JGfemS3JU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28270 [article]

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A fleeting glance inside lightweight materials / Markus Thurmeier in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 9 (09/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 9 (09/2016) . - p. 114-117 Titre : A fleeting glance inside lightweight materials : Active thermography for testing mass-produced composite parts Type de document : texte imprimé Auteurs : Markus Thurmeier, Auteur ; Michael Fischlschweiger, Auteur ; Alexander Stock, Auteur Année de publication : 2016 Article en page(s) : p. 114-117 Langues : Anglais (eng) Catégories : Composites à fibres de carbone Composites thermoplastiques Contrôle non destructif Thermographie Index. décimale : 668.4 Plastiques, vinyles Résumé : Wherever materials properties can contribute to weight savings, it is especially important to optimize the parts. A recent study by the Audi AG and Ottronic Regeltechnik GmbH shows which role non-destructive testing using active thermography can play. Note de contenu : - Quality plays a special role - In-Depth information - The measuring principle in active thermography - Testing FCPs with thermoplastic matrices - Industrial use of the testing system - Automated testing for mass production - Even more weight savings - FIGURES : 1. CFRP in mass production : The space frame of an Audi A8 is the result of multi-material construction - 2. The principle of active thermography : An excitation source heats the test object for a short time, inducing a change in temperature. The temperature signal detected by an infrared detector is processed, evaluated, and displayed graphically - 3. Simulation : Temporal temperature curve (color shading) through the depth of test object for a single heat pulse and the input of several pulses, such as used in the lock-in process. The dotted white line indicates the delay in temperature spreadin - 4. Ottronic ATIIS Vari : Industrially applicable system for active thermography En ligne : https://drive.google.com/file/d/1tWyO9n8AfVvEOP_AC7GVYJgrapoD6yPY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28052 [article]

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Heating technology as a key factor / Markus Thurmeier in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 6 (06/2014)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 6 (06/2014) . - p. 46-47 Titre : Heating technology as a key factor : Lightweight construction with thermoplastic FRP requires new directions in processing Type de document : texte imprimé Auteurs : Markus Thurmeier, Auteur ; Alexander Stock, Auteur ; Michael Fischlschweiger, Auteur Année de publication : 2014 Article en page(s) : p. 46-47 Langues : Anglais (eng) Catégories : Chauffage Composites à fibres -- Moulage par injection Matériaux -- Allègement Index. décimale : 668.4 Plastiques, vinyles Résumé : Fiber-reinforced plastic composites play a key role in future mobility. The biggest challenge at present is to develop material systems and processes that permit economic and efficient use of materials for large series production. The enormous potential of thermoplastic fiber-resin composite solutions for this is already emerging but also the claim that they explore new directions in processing. Note de contenu : - The goal is to reverse the weight - Shortening the path from the semi-finished product to the part - Controlled heating reduces stress on the matrix - Installed powder versus energy consumption - Uniform heating of semifinished products with variable wall thickness En ligne : https://drive.google.com/file/d/1THZyAKrT5JHin7fWqPFK4XjEVS7E5u67/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21627 [article]

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Increasing stability with hollow structure / Eva Heiml in PLASTICS INSIGHTS, Vol. 114, N° 2-2024 (2024)  

[article]  inPLASTICS INSIGHTS > Vol. 114, N° 2-2024 (2024) . - p. 56-59 Titre : Increasing stability with hollow structure : Projectile injection technology changes the rules for thermoplastic structural components Type de document : texte imprimé Auteurs : Eva Heiml, Auteur ; Markus Wimmer, Auteur ; Umut Cakmak, Auteur ; Christian Wolfsberger, Auteur ; Markus Thurmeier, Auteur Année de publication : 2024 Article en page(s) : p. 56-59 Langues : Anglais (eng) Catégories : Composites à fibres de carbone Composites à fibres de verre Corps creux Matières plastiques dans les automobiles Moulage par injection assisté par projectile 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 : Plastic Innovation GmbH is developing a concept for the integration of stiffening structures with the possibility of function integration for automotive components that can be economically and sustainably produced in one production cycle using projectile-assisted injection molding. With the support of several partners from research and industry, test components were manufactured, and numerical simulations were conducted to evaluate the residual wall thickness of the hollow structures. Note de contenu : - Hollow components for mobility - Comparison of FAIM and PAIM - Different cavity cross-sections and residual wall thicknesses - Special feature of the tool : projectiles are produced in one shot - Better results with PAIM - Fig. 1 : Comparison of cooling times of cylinders with equal mass and different cross-sections. For the hollow cylinder, approximately the formula for plates is used - Fig. 2 : Comparison of resulting hollow cross-sections with different geometries for FAIM and PAIM - Fig. 3 : Experimental component with reinforcing thin-walled channel geometries. Injection points of the polymer melt or fluid, as well as the overflow cavity, are depicted, along with the projectiles in three different sizes (large, medium, small) - Fig. 4 : Six measurement positions for determining the residual wall thickness - Fig. 5 : Residual wall thicknesses at different measurement positions for PP plates - Fig. 6 : Residual wall thicknesses at different measurement positions for PA plates - Fig. 7 : Comparison of three plates produced with different projectiles using the PAIM process - Table : Comparison of component masses for PP and PA plates, manufactured using the GAIM and PAIM processes, with simulation results En ligne : https://drive.google.com/file/d/1xheA-koayk2frZQ9kfsZLQUjsXTzGXuD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40953 [article]

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