Increasing efficiency by stretchblow molding via CAE / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 5 (05/2014)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 5 (05/2014) . - p. 28-31 Titre : Increasing efficiency by stretchblow molding via CAE Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Sebastian Rasche, Auteur Année de publication : 2014 Article en page(s) : p. 28-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques Matières plastiques -- Moulage par injection-étirage-soufflage Polyéthylène téréphtalate Préformes Objet constituant la majeur partie d’une pièce à fabriquer et qui nécessite un travail supplémentaire pour devenir une pièce finie. Ce terme s’utilise notamment pour le moulage, l’usinage, la taille d’outils en silex, la fabrication de fibre optique… Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : Simulation - The application of optimization routines is a valuable tool for the design of new preform or bottle designs. Besides the optimized preform geometry, well adapted process parameters are calculated. Note de contenu : - Three-dimensional process simulation - Application of the automated optimization - Variation of the process parameters - Optimized geometry meets target En ligne : https://drive.google.com/file/d/1YduV8nokpAZiF9-22I1AL_38AMo41bLa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21356 [article]

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Modelling behaviour of PET for stretch and micro-blow moulding applications using an elasto-visco-plastic material model / H. Mir in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 2 (05/2011) . - p. 173-181 Titre : Modelling behaviour of PET for stretch and micro-blow moulding applications using an elasto-visco-plastic material model Type de document : texte imprimé Auteurs : H. Mir, Auteur ; F. Thibault, Auteur ; R. DiRaddo, Auteur Année de publication : 2011 Article en page(s) : p. 173-181 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Elastoviscoplasticité Matières plastiques -- Moulage par injection-étirage-soufflage Modèles mathématiques Modélisation tridimensionnelle Polyéthylène téréphtalate Rhéologie Simulation, Méthode de Index. décimale : 668.9 Polymères Résumé : Polyethylene terephthalate (PET) has been widely used in the stretch blow moulding (SBM) process for packaging applications. Finite element analysis has become extensively useful for assessing container designs and enabling the designers to perform analyses earlier in the design cycle to determine the best material and the best structure. However, there are several challenging issues due to various processing parameters and complex material behaviour, which is both temperature and strain-rate dependent. In this paper, we generalize the G’Sell-Jonas law in the three-dimensional (3D) case to model and simulate the elasto-visco-plastic (EVP) behaviour of PET, taking into account strain-hardening and strain-softening. In addition, it is observed that the internal pressure (inside the preform) is significantly different from the nominal pressure (imposed in the blowing device upstream) since the internal pressure and the enclosed volume of the preform are fully coupled. In order to accurately simulate this phenomenon, a thermodynamic model was used to characterize the pressurevolume relationship (PVR). The predicted pressure evolution is therefore more realistic when imposing only the machine power of the blowing device (air compressor or vacuum pump). Mechanical and temperature equilibrium equations are fully nonlinear and solved separately with implicit schemes on the current deformed configuration, which is updated at each time step. Biaxial characterization tests were used to determine the model parameters in order to simulate the SBM process using the PVR. Three industrial case studies, comparing simulated thickness predictions to experimental measurements, will be presented in order to illustrate the applicability of the proposed model. Note de contenu : - MODELLING OF PET AND BLOW MOULDING : Elasto-visco-plastic model of PET - Pressure volume relationship - Numerical implementation - MATERIAL CHARACTERIZATION : Biaxial testing - Parameter identification - EXPERIMENTAL VALIDATION : Stretch blow moulding - Simulation methods - Comparison study - Validation - Micro-blow moulding - Simulation and validation DOI : 10.3139/217.2414 En ligne : https://drive.google.com/file/d/1izYXtVIHSCAoGfD-YDt3cPG0BEBoXPQ9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11521 [article]

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Optimization of injection stretch blow molding : Part I - Defining part thickness profile / R. Denysiuk in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 3 (07/2019)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 3 (07/2019) . - p. 314-323 Titre : Optimization of injection stretch blow molding : Part I - Defining part thickness profile Type de document : texte imprimé Auteurs : R. Denysiuk, Auteur ; N. Gonçalves, Auteur ; Renê de Souza Pinto, Auteur ; H. Silva, Auteur ; F. Duarte, Auteur ; J. Nunes, Auteur ; A. Gaspar-Cunha, Auteur Année de publication : 2019 Article en page(s) : p. 314-323 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eléments finis, Méthode des Matières plastiques -- Moulage par injection-étirage-soufflage Matières plastiques -- Propriétés mécaniques Index. décimale : 668.4 Plastiques, vinyles Résumé : This paper suggests a methodology based on a neuroevolutionary approach to optimize the use of material in blow molding applications. This approach aims at determining the optimal thickness distribution for a certain blow molded product as a function of its geometry. Multiobjective search is performed by neuroevolution to reflect the conflicting nature of the design problem and to capture some possible trade-offs. During the search, each design alternative is evaluated through a finite element analysis. The coordinates of the mesh elements are the inputs to an artificial neural network whose output determines the thickness for the corresponding location. The proposed approach is applied to the design of an industrial bottle. The results reveal the validity and usefulness of the proposed technique, which was able to distribute the material along the most critical regions to obtain adequate mechanical properties. The approach is general and can be applied to products with different geometries. Note de contenu : - INJECTION STRETCH BLOW MOLDING : Model for finite element analysis - Global optimization - Proposed methodology - RESULTS AND DISCUSSION : Case study - Study of different variants - Optimization results DOI : https://doi.org/10.3139/217.3746 En ligne : https://drive.google.com/file/d/1zbshYOtBGCGpf_gpV2bKFwRLw61WLH6v/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32891 [article]

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Premium class packaging / Günter Ausserwöger in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 4 (04/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 4 (04/2018) . - p. 40-42 Titre : Premium class packaging : A combination process integrates product protection with cost efficiency Type de document : texte imprimé Auteurs : Günter Ausserwöger, Auteur Année de publication : 2018 Article en page(s) : p. 40-42 Langues : Anglais (eng) Catégories : Aliments -- Emballages Emballages en matières plastiques Matériaux -- Propriétés barrières Matières plastiques -- Moulage par injection-étirage-soufflage Oxygène Polymères en médecine Résistance thermique Transparence (optique) Index. décimale : 668.4 Plastiques, vinyles Résumé : With an economic manufacturing process, Greiner Packaging achieves an especially high quality in the production of plastic packaging. The "Kavoblow" one-step injection stretch blow molding process, in combination with barrier technology, provides packaging with a high oxygen barrier and thermal resistance, as well as very good transparency properties. Note de contenu : - High flexibility and efficiency at low cost - Transparent, heat resistant and with an oxygen barrier - Applications in medical care - FIGURES : 1. In the one-step injection stretch blow molding process, a conveying carriage transfers the injection molded preforms into the blow molding station while they are still hot - 1. The Kavoblow plant size is designed for a production of 10 to 20 million narrow-neck bottles or wide-neck containers per year - 2. The injection molding station in the Kavoblow process can be upgraded to multi-barrier technology - 3. The oxygen barrier embedded in the commodity plastic (green in this case) protects th epackaged contents against external influences - 4. The first Kavoblow MBT packaging product was a ketchup bottle for the German sauce manufacturer Develey, which was launched on the Polish market in late 2007 En ligne : https://drive.google.com/file/d/1YDMYnp-m-v8J2e4TvE5nxRUUsOhEoVgu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30491 [article]

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Simplified modeling of convection and radiation heat transfer during infrared heating of PET sheets and preforms / Y.-M. Luo in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 5 (11/2015)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 5 (11/2015) . - p. 554-565 Titre : Simplified modeling of convection and radiation heat transfer during infrared heating of PET sheets and preforms Type de document : texte imprimé Auteurs : Y.-M. Luo, Auteur ; L. Chevalier, Auteur ; F. Utheza, Auteur ; X. Nicolas, Auteur Année de publication : 2015 Article en page(s) : p. 554-565 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Calcul Eléments finis, Méthode des Matières plastiques -- Moulage par injection-étirage-soufflage Polyéthylène téréphtalate Préformes Objet constituant la majeur partie d’une pièce à fabriquer et qui nécessite un travail supplémentaire pour devenir une pièce finie. Ce terme s’utilise notamment pour le moulage, l’usinage, la taille d’outils en silex, la fabrication de fibre optique… Rayonnement infrarouge Simulation par ordinateur Thermocinétique Index. décimale : 668.4 Plastiques, vinyles Résumé : Initial heating conditions and temperature effects have an important influence during the injection stretch blow molding process of PET preforms. The paper provides a simplified modeling of the infrared (IR) flux provided by the IR lamps and the convection heat transfer with air, for the finite element simulation of the heating of PET samples. This modeling enables fast thermal simulations in industrial context. First, a complete 2D simulation of the air convection around a PET sheet sample is conducted using ANSYS/FLUENT to compute the local convection heat transfer coefficient. The distribution of this coefficient along the PET wall is then interpolated by a best linear fit function of the wall position to provide the boundary condition of the convection heat transfer thereafter. This boundary condition, coupled with the calculation of the infrared flux absorbed by the PET sheet sample, allows a 3D calculation of the time evolution of the sample temperature. This calculation is validated by comparing the experimental temperature distribution of the PET sheet obtained from an IR camera with the numerical results of the simulation. Second, we focus on the modeling of the heating of a cylindrical PET preforms by IR lamps. In our approach, the IR heating flux is calculated using the spectral and surface-to-surface radiation laws adapted to the sample geometry. The air convection effect around the preform is modeled using the heat transfer coefficient identified from the 2D plane sheet case. It is applied on the boundaries of a simpler model in Comsol where only the preform is meshed. The temperature distribution on the outer surface of the preform is compared to experimental measurements by thermal imaging. A good agreement is observed which validates the whole approach used. Note de contenu : - IDENTIFICATION OF THE THERMAL BOUNDARY CONDITIONS FOR THE INFRARED HEATING SIMULATION OF A PET SHEET : Complete 2D model of IR heating and natural air convection - Computation of convective heat transfer coefficient - Validation of a h for a 3D simulation of the PET sheet alone - MODELLING OF THE INFRARED HEATING OF THE PET PREFORM : Computation of the incident radiation on the PET preform - 3D simulation of the IR heating of a PET preform and experimental comparaison DOI : 10.3139/217.3092 En ligne : https://drive.google.com/file/d/1jNPbTXwC48CDbEjTkf9wyiMahsJcX2b5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24818 [article]

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Stretch blow molding of mineral filled PET / N. Billon in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 4 (08/2015)  

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Structural-mechanical behavior of filled PET bottles / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 9 (09/2012)

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Upright in the biggest crowd in KUNSTSTOFFE INTERNATIONAL, Vol. 99, N° 6/2009 (06/2009)

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