Having a good grip on hot laminates / Christian Götze in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 9 (09/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 9 (09/2016) . - p. 94-97 Titre : Having a good grip on hot laminates : UD tape reinforcement minimizes weight while maximizing local loading capacity Type de document : texte imprimé Auteurs : Christian Götze, Auteur ; Philipp Böhme, Auteur ; Bert Rietman, Auteur ; Emmanuel Boxus, Auteur ; Stefan Fenske, Auteur ; Stefan Schierl, Auteur Année de publication : 2016 Article en page(s) : p. 94-97 Langues : Anglais (eng) Catégories : Adhésion Anisotropie Composites à fibres -- Moulage par injection Composites à fibres -- Propriétés mécaniques Composites à fibres -- Surmoulage Fibres à orientation unidirectionnelle Fibres continues Matériaux -- Allègement Stratifiés Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : A recently developed variant for processing continuous fiber-reinforced semi-finished products by injection molding, involves positioning a defined number of UD laminates appropriate to the specific requirements in the mold and then overmolding them. The resultant lightweight, three-dimensional parts have rigidity and strength which are markedly anisotropic and optimized for their particular loading situations. Note de contenu : - Taking material savings to the max - Demonstrator component reveals application potential - Heated UD laminates pose engineering challenges - Manufacturing skills combine to obtain molding - Tested and found suitable for mass production - FIGURES : 1. Demonstrator component with three UD laminate inlays of different dimensions. In the demonstrated cross-section (bottom) the inlays are colored in green - 2. For Transferring the laminates into the mold, KraussMaffei developed a specially optimized gripper system and also integrated - 3. Using the production cell completely installed by KraussMaffei, the demonstrator part could be manufactured with a cycle time of under 60s - 4. GKTool designed and built the mold for manufacturing the dmonstrator part and punch and matrix - 5. The results from the filing simulation match well with the filling study performed - 6. Depending on how the cavity fills with melt, the clamping elements can be separately retracted - 7. The comparison between simulation and the 4-point bending reveals a good match and thus the high quality of both the calculation and the component produced. The failure point under tensile (laminate on the underside) and compressive loading (laminate on the top side) is marked in red in each case Résumé: A recently developed variant for processing continuous fiber-reinforced semi-finished products by injection molding, involves positioning a defined number of UD laminates appropriate to the specific requirements in the mold and then overmolding them. The resultant lightweight, three-dimensional parts have rigidity and strength which are markedly anisotropic and optimized for their particular loading situations. En ligne : https://www.kunststoffe.de/en/journal/archive/article/ud-tape-reinforcement-mini [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27781 [article]

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Reaching the desired weight in just a few steps / Jochen Mitzler in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 3 (03/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 3 (03/2016) . - p. 32-34 Titre : Reaching the desired weight in just a few steps : KraussMaffei customer Takata reduces component weight from 560 to 275 grams Type de document : texte imprimé Auteurs : Jochen Mitzler , Auteur ; Stefan Fenske, Auteur Année de publication : 2016 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Airbag Automobiles -- Pièces Composites à fibres -- Moulage par injection Composites à fibres -- Thermoformage Composites à fibres de verre Matériaux -- Allègement Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : The FiberForm process developed by KraussMaffei combines the thermoforming of organic sheets and injection molding into one process. This process results in fiber-reinforced plastic components that are particularly lightweight yet feature a high level of strength. They are used primarily in vehicle manufacturing. KraussMaffei, together with the automotive supplier Takata, further developed the process during the manufacturing of an airbag housing. As a result, the component weight was reduced by half. Note de contenu : - First development step : transitioning to the organic sheet - Second step : converting to long fiber-reinforced polypropylene - Sensitive heating process - Third step : mixing materials to save costs - Guaranteed weight consistency En ligne : https://drive.google.com/file/d/1lQNaKYtOyDweJ9LW6YTGGm-c26Dkb4PA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25957 [article]

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