Mastermind in the fiber placement head / Hofmann, Reni in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 9 (09/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 9 (09/2017) . - p. 60-65 Titre : Mastermind in the fiber placement head : Additive manufacture of carbon-fiber-reinforced components using UV radiation Type de document : texte imprimé Auteurs : Hofmann, Reni, Auteur ; Pfitzer, Hanno, Auteur ; Jarlath McHugh, Auteur ; Joachim Starke, Auteur Année de publication : 2017 Article en page(s) : p. 60-65 Langues : Anglais (eng) Catégories : Automobiles -- Matériaux Automobiles -- Pièces Composites à fibres de carbone Impression tridimensionnelle Lampes à rayonnement ultraviolet Placement automatisé de fibres Polymérisation Stratifiés Structures multicouches Index. décimale : 668.4 Plastiques, vinyles Résumé : The manufacture of carbon-fiber-reinforced plastic components for automotive serial production must be fast and cost-competitive. The ideal solution would be a one-stage process. In a potential study, a selective fiber placement unit was tested that combines fiber placement, resin injection, and curing in a single process step – with placement rates of up to 1 m/s. Note de contenu : - Production concept with selective fiber placement unit - Generic approach - Characteristic results of the potential phase - Lamp technique - Selection of a suitable material system - Process and production parameters - FIGURES : 1. Comparaison between the CFRP manufacturing processes of resin transfer molding (RTM)and selective fiber placement: from the roving directly to the component - 2. Test chain from the static process over the dynamic process to the pilot-scale additive manufacture - 3. Comparison between the wave-lengths emitted by mercury vapor and UV-LED lamps - 4. Material requirements and selection system to meet the necessary process criteria - 5. Static test installation for the production of single laminate layers using UV curing - 6. Graphic representation of the different pure resin and laminate for placement speeds of 1m/s, 0.31m/s and 0.06m/s. The middle graph shows the degree of conversion as a function of exposure time and glass transition temperature. The target states for the placed laminated layers and final CFRP laminate are indicated in yellow - 7. Light micrographs of a UV-cured individual laminated layer, a multi-layer laminate (b-stage/b-stage) and a multi-layer laminate (b-stage/full cure). The sample were produced without a press En ligne : https://drive.google.com/file/d/1QZPURWkyTT7syIgyzh68PemFfflx4Rvs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29123 [article]

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Serial CFRTP structural part for BMW Group body-in-white application / Thomas Hogger in JEC COMPOSITES MAGAZINE, N° 147 (09-10/2022)  

[article]  inJEC COMPOSITES MAGAZINE > N° 147 (09-10/2022) . - p. 40-44 Titre : Serial CFRTP structural part for BMW Group body-in-white application Type de document : texte imprimé Auteurs : Thomas Hogger, Auteur ; Eva Honickel, Auteur ; Pfitzer, Hanno, Auteur Année de publication : 2022 Article en page(s) : p. 40-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Carrosseries Composites à fibres de carbone -- Recyclage Durée de vie (Ingénierie) Fibres à orientation unidirectionnelle Matériaux -- Allègement Matières plastiques dans les automobiles Index. décimale : 668.4 Plastiques, vinyles Résumé : A new lightweight design for CFRTP parts combining thermoformed UD carbon fibre rods and injection moulding is described from the idea up to serial CFRTP structural part for BMW Group body-in-white application. Moulding is described from the idea up to serial production for the BMW iX at BMW Group's plant in Landshut. The resulting skeleton frame is both cost-competitive and sustainable. Note de contenu : - The idea of skeleton construction - Concept studies - Pre-development - Series development - Production of the skeleton components and integration into the BMW iX - Component design and protection - Sustainability, lightweight construction and recycling - Fig. 1 : Lightweight construction approaches - Fig. 2 : MAI Skelett concept component (a), bending test (b) and results (c) - Fig. 3 : Components of the BMW iW's series front roof bow - Fig. 4 : Carbon fibre recycling steps - Fig. 5 : BMW Group's plant in Landshut that produces the BMW iX's skeleton components - Fig. 6 : Results of the BMW iX's CFRTP windscreen using the skeleton design En ligne : https://drive.google.com/file/d/13_El-wUh-Joi8kZ45hR2p_30OYv36RIa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39278 [article]

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