Light and well-made by sand / Michael Wilhelm in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 11 (11/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 11 (11/2017) . - p. 6-13 Titre : Light and well-made by sand : Mass production of complex structural hollow parts Type de document : texte imprimé Auteurs : Michael Wilhelm, Auteur Année de publication : 2017 Article en page(s) : p. 6-13 Langues : Anglais (eng) Catégories : Composites à fibres de carbone Matériaux -- Allègement Motocyclettes -- Matériaux Moulage par transfert de résine sous vide Polyuréthanes Index. décimale : 668.4 Plastiques, vinyles Résumé : Aerospace and racing without high-performance applications of fiber-composite structural parts have become unimaginable. Integrally manufactured hollow parts achieve top lightweight quality in those fields. Future mass production of complex hollow fiber-composite parts on an industrial scale required that a decisive step had to be taken in order to automate the HP-RTM process. Note de contenu : - The cavus production process - Ideas for a functional and process-ready design - Part and process simulation - Sand core production via core shooting - Preform production with hardly any clippings - Polyurethane matrix within a short cycle time - Parameters for the project - High requirements for moldd technology - New type of sealing material - Result: almost two thirds lighter - Further developments in the R.A.C.E project - Fig. 1. ln the R.A.C.E. project based on the Cavus technology, a license plate holder was developed for the KTM Superduke 1290R motorcycle as a demonstrator part for mass production - Fig. 2. Cavus production cycle (clockwise from the left) : The (e.g., additively produced) sand core is braided with carbon fibers and afterwards infiltrated in the mold in the HP-RTM process. Once solidifie & the core is removed using water - Fig. 3. Design sketches for the license plate holider - Fig. 4. Simultaneous Engineering Method : even before the final design was finished, 21 specialists from eight partners cooperated in further tasks, such as detail design, calculation, mold development, sealing technology, and process automation - Fig. 5. Complex simulations : Braiding simulation requires many resources, but it provides early warning of problem zones and defines the path by which the robot guides the core through the radial braider - Fig. 6. Cavus sand tore by Reinsicht (formerly H2K Minerals) - Fig. 7. Automated braiding of the core in the radial braider - Fig. 8. Rheological curves of the Vitrox RTM332 at different snap cure times - Fig. 9. Constant pressure injectors prevent internai maki pressure fred) from affecting part pressures (green yellow) - Fig. 10. Intelligent mold filling : Mixed components are injected into the mold until the process is switched off by pressure control - Fig. 11. Automated removal of the finished part from the mold - Fig. 12. Hybrid license plate holder made from glass fiber with carbon fiber-reinforcement included by Tailored Fiber Placement - Fig. 13. Functionalized, hybrid license plate holder with blue-colored matrix and LEDs integrated in the preform En ligne : https://drive.google.com/file/d/1jxIlHi5P2-mDWqVpBA1YJYzvT2bzjbHZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29532 [article]

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