Declaring war on quench marks / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 11 (11/2018) . - p. 37-41 Titre : Declaring war on quench marks : The correct plug geometry makes the wall thickness more homogenous Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Dennis Balcerowiak, Auteur Année de publication : 2018 Article en page(s) : p. 37-41 Langues : Anglais (eng) Catégories : Bouchons en matières plastiques Conception technique Matériaux -- Allègement Matériaux -- Epaisseur Matières plastiques -- Thermoformage Index. décimale : 668.4 Plastiques, vinyles Résumé : In addition to the choice of forming process parameters, the design of the pre-stretching plug in particular affects the wall thickness distribution. By directing plastic material into areas where thin spots develop during forming when using only compressed air, the material consumption and therefore weight can be reduced while maintaining a consistent component quality, simultaneously reducing the risk of quench mark formation during production. Note de contenu : - Plug-assisted thermoforming - Development and design of pre-stretching plug geometries - Studies of the stretching distance and timing of compressed air activation - Influence of the plug geometry - Fig. 1 : Tool Geometry, plug dimensions, and measuring path to evaluate the produced cups. The invervals between the measuring points are 5 mm - Fig. 2 : Wall thickness distribution of a cup produced without plug stretching and calculated, theoretical, homogenous wall thickness of a cup with the same mass (red line). For improved clarity, the respective values across from each other in the component have been averaged and shown on one cup half in the following diagrams - Fig. 3 : Plug geometries : these shapes were developed to analyze the influence on the wall thickness distribution - Fig. 4 : Preliminary investigation : the influence of the compressed air activation timing is low, the plug stretching distance on the other hand has a greater influence on the wall thickness distribution - Fig. 5 : The plug edge radius with a constant wall incline mainly exhibits influences on the floor of the component - Fig. 6 : Variation of the plug wall angles with a constant plug edge radius shows a considerable influence on the wall thickness distribution - Fig. 7 : Using a cone-shaped, pointed plug produces a heterogeneous wall thickness distribution En ligne : https://drive.google.com/file/d/1m0zPYnoyQaXxfy-wLzHlFUY0fkyjaK2g/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31538 [article]

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Industry 4.0 saddles up / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 9 (09/2016)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 9 (09/2016) . - p. 90-93 Titre : Industry 4.0 saddles up : Individualized large-scale production of thermoplastic lightweight components Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Matthias Theunnissen, Auteur ; Arne Böttcher, Auteur ; Nicolai Lammert, Auteur ; Florian Kessler, Auteur ; Dennis Balcerowiak, Auteur Année de publication : 2016 Article en page(s) : p. 90-93 Langues : Anglais (eng) Catégories : Automatisation Composites à fibres Fibres continues Industrie 4.0 Le concept d’Industrie 4.0 correspond à une nouvelle façon d’organiser les moyens de production : l’objectif est la mise en place d’usines dites "intelligentes" ("smart factories") capables d’une plus grande adaptabilité dans la production et d’une allocation plus efficace des ressources, ouvrant ainsi la voie à une nouvelle révolution industrielle. Ses bases technologiques sont l'Internet des objets et les systèmes cyber-physiques. Mousses plastiques -- Moulage par injection Stratifiés Technique de la production Index. décimale : 668.4 Plastiques, vinyles Résumé : Foamed injection molded parts with continuous fiber reinforcement satisfy high demands. The project of an industry consortium, led by IKV, shows how these parts are individually customized and produced using a fully automated manufacturing cell. The implementation of an Industry 4.0 cyber physical production system (CPPS) is a key technology to produce multi-variant products. Note de contenu : - Muli-variant combination of foam injection molding and continuous fiber reinforcement - Laminates and tapes for thermoplstic fiber reinforcement - Profoam technology ensures gentle processing of the fibers - Individualized production with large-scale production costs - Dipping edge tool and kinematic fixing elements - TABLE : A strong industry consortium of the IKV network enables the realization of an innovative production unit - FIGURES : 1. ProFoam lock for physical foam injection molding. Because there is no need for shear and mixing elements, fiber damage is reduced - 2. Fully automated flow of substances and data : The injection molding machine interacts with different up-and downstream production stages - 3. Online variation of the process enables large variant diversity : the flexible alignment of mold elements allows the production of different component designs - 4. Kinematic fixing elements inside the mold with dipping edges hols the laminates and tapes in position during the back molding process. Flow lines can be prevented Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27780 [article]

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