An annular rotating-die technique in extrusion process : effect of Mandrel rotating speed on extrudate swell behavior of HDPE parison / N.-T. Intawong in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 5 (11/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 5 (11/2014) . - p. 607-615 Titre : An annular rotating-die technique in extrusion process : effect of Mandrel rotating speed on extrudate swell behavior of HDPE parison Type de document : texte imprimé Auteurs : N.-T. Intawong, Auteur ; A. Darajang, Auteur ; S. Udomsom, Auteur ; T. Yoochoosai, Auteur ; C. Kantala, Auteur Année de publication : 2014 Article en page(s) : p. 607-615 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Extrudeuse monovis Extrudeuse rotative Matières plastiques -- Moulage par extrusion-soufflage Polyéthylène haute densité Index. décimale : 668.9 Polymères Résumé : This work aims to propose an annular rotating-die technique which is specifically designed and constructed in order for the mandrel to rotate in the stationary barrel during extrusion. The annular rotating-die was employed to study the effect of the mandrel rotating speeds on the extrudate swell behavior of HDPE parison in single screw extruder at a test temperature of 210°C. The results of experiment found that rotation of mandrel caused significant change in dimension of HDPE parison after it flowed out from the annular rotating-die. It was also found that at the same apparent shear rate, the diameter swell decreased with increasing mandrel rotating speed whereas the thickness swell yielded opposite results. These results could be explained by the change of flow direction during the flow of HDPE melt in the annular rotating-die. Furthermore, the annular rotating-die technique proposed in this research could be applied in adjusting size of diameter and thickness and in predicting thickness of HDPE parison during extrusion with no need to change any production parameter in the polymer extruder. Note de contenu : - EXPERIMENTAL : 1. Raw material - 2. Experimental apparatus and procedures - 3. Apparent shear rate calculation - 4. Measurements of the extrudate swell - RESULTS AND DISCUSSION : 1. Development of HDPE parison Dimension after exiting from the annular rotating-die - 2. swelling properties of HDPE parison in an annular rotating-die - 3. Application of annular rotating-die technique in extrusion process DOI : 10.3139/217.2930 En ligne : https://drive.google.com/file/d/1tLPjdpXncHHo2aDcykDzGVhJPQM2w01n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22227 [article]

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Automated optimization of hollow bodies / Benjamin Twardowski in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 39-43 Titre : Automated optimization of hollow bodies : Application of computer-aided routines in the design of hollow bodies manufactured in the extrusion blow molding process Type de document : texte imprimé Auteurs : Benjamin Twardowski, Auteur ; Sarah Schäfer, Auteur ; Christian Hopmann, Auteur Année de publication : 2017 Article en page(s) : p. 39-43 Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques Matières plastiques -- Moulage par extrusion-soufflage Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : Improving the mechanical properties of hollow bodies using structural elements is not yet state-of-the-art in the blow molding industry. At the institute for plastics processing (IKV) at the RWTH Aachen University, an approach was developed for the computer-aided design of blow molded articles with stiffening structures. Note de contenu : - Empirical investigations of hollow bodies with corrugation structures - Applied simulation routine - Result of the optimization routine - FIGURES : 1. Blow molding line and mold for the production of test specimens - 2. Wall thickness distribution of a bottle with beads and a bottle without beads in the same process point - 3. Wall thickness distribution along the beads - 4. Input data of the process simulation in B-SIM - 5. Comparison of the simulated and measured wall thickness distribution of the bottles with and without corrugation structures - 6. Comparison of topload simulation and experimental investigations with and without corrugation structures - 7. Comparison of measured topload and topload simulation with adjusted wall thickness distribution according to the measurements - 8. Deterministic optimization : radius, number and distortion are normalized by the maximum values - 9. Comparison of the bottle without corrugation structures and the deterministically optimized bottle - 10K Stochastic optimization En ligne : https://drive.google.com/file/d/16KsdYxyOQT41U3kCiWFkAvZEfw-yaU1S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29681 [article]

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Calcium carbonate improves blown films properties / Ralf Wiechmann in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 1-2 (01-02/2015)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 105, N° 1-2 (01-02/2015) . - p. 46-48 Titre : Calcium carbonate improves blown films properties : Direct extrusion with mineral fillers Type de document : texte imprimé Auteurs : Ralf Wiechmann, Auteur Année de publication : 2015 Article en page(s) : p. 46-48 Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Charges (Matériaux) -- Dosage Coût -- Contrôle Emballages en matières plastiques Films plastiques Films plastiques -- Propriétés mécaniques Matières plastiques -- Moulage par extrusion-soufflage Index. décimale : 668.4 Plastiques, vinyles Résumé : The addition of calcium carbonate into the blown film process is the most effective way to boost productivity and output, and to improve the mechanical properties of the film. Thanks to a newly developed technology, direct dosing of CaCO₃ powder is now possible. Note de contenu : - CaCO3 : a natural product - Why is CaCO3 used in blown film ? - Improved film properties - Lower formulation cost - Increased sustainability - Advantages of direct dosage En ligne : https://drive.google.com/file/d/1amBXQFv1SM18ulM9e_Tx6SVoTevRmHdh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23297 [article]

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Converging-diverging flow in a novel extruder and its application in film blowing / X.-C. Yin in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 5 (11/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 5 (11/2014) . - p. 552-557 Titre : Converging-diverging flow in a novel extruder and its application in film blowing Type de document : texte imprimé Auteurs : X.-C. Yin, Auteur ; B. Tang, Auteur ; Z. W. Yu, Auteur ; Z. T. Yang, Auteur ; G.-J. He, Auteur Année de publication : 2014 Article en page(s) : p. 552-557 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Déchirure (mécanique) Essais dynamiques Extrudeuse rotative Films plastiques -- Propriétés mécaniques Matières plastiques -- Moulage par extrusion-soufflage Mélange Microstructures -- Analyse Plastification Polyéthylène basse densité Traction (mécanique) Index. décimale : 668.9 Polymères Résumé : This article proposes a novel extruder based on converging-diverging flow for polymer processing. The extruder is composed of four vane plasticizing and conveying units (VPCU) and three mixing units. The working principle of the new extruder is described in detail. Film was produced on this machine by using of CaCO3 filled LDPE composites. The film's mechanical properties were studied in terms of tensile strength and tear strength. The microstructure of the composites was studied in terms of SEM. The thermo-mechanical history of the material suffered in this extruder can be remarkably shortened in contrast to a single screw extruder with the same maximum output. Experimental results showed that the die pressure has little effect on output. More CaCO3 can be filled into the blend without degrading the parts performance. Note de contenu : - EXPERIMENTAL : 1. Vane plasticizing and conveying unit - 2. Mixing unit - 3. Converging-Diverging flow type extruder - 4. Materials - 5. Preparation of CaCO3 filled LDPE film - 6. Specimen preparation - 7. Characterization and measurement - RESULTS AND DISCUSSION : 1. Extrusion characteristics of the extruder - 2. Mechanical properties - 3. Microstructure of the CaCO3/LDPE blends DOI : 10.3139/217.2856 En ligne : https://drive.google.com/file/d/1Ei3tldSGX80DfX1095ykJE21slH2zVFM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22220 [article]

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Extrusion blow molding / Michael Thielen / Munchen [Germany] : Hanser (2021) 

Titre : Extrusion blow molding Type de document : texte imprimé Auteurs : Michael Thielen, Auteur Editeur : Munchen [Germany] : Hanser Année de publication : 2021 Importance : XI-192 p. Présentation : ill. Format : 25 cm ISBN/ISSN/EAN : 978-1-56990-840-2 Prix : 120 E Note générale : Index - Bibliogr. Catégories : Matières plastiques -- Moulage par extrusion-soufflage Index. décimale : 668.4 Plastiques, vinyles Résumé : This book covers the wide spectrum of extrusion blow-molded hollow bodies, which find application for instance in packaging, storage, and transport or channeling of liquids, gases, or bulk materials, as well as for toys, sporting goods, or technical applications in the automotive or household appliances sectors. The necessary information for fundamental understanding of extrusion blow molding technology is provided, making it easy to comprehend the interrelationships during processing and in applications. This practical knowledge is aimed at facilitating the reader's daily work and studies. In addition to various fields of application and manufacturing processes, aspects of product development and possibilities of blow molding simulation are presented. Further sections on peripheral equipment, downstream equipment, and recycling round off the book. Note de contenu : - 1. INTRODUCTION : Hollow plastic parts - What are they for ? - Processes to produce hollow plastic parts - Application areas for blow molded hollow pqrts - History of blow molding hollow parts - 2. EXTRUSION BLOW MOLDING : Process sequence for extrusion blow molding - Raw materials - Machine technology - Blow molding tools - Downstream and auxiliary equipment - Special process variants - 3. PRODUCT DEVELOPMENT : Product trials and testing - Designing for blow molding - CAE, simulation procedures : process and product simulation - Product development in extrusion blow molding - Feasibility analysis sandbox - Calculation of the internal burst pressure of a windshield wiper water tank - 4. THE BLOW MOLDING OPERATION : From the idea to the product - Changeover - Layout of a blow molding process - 5. RECYCLING IN EXTRUSION BLOW MOLDING TECHNOLOGY : Possible strategies for processing regrind - Layer structures for blow molded parts with recycled material - Recycling in six-layer coextrusion - Preparation of the material - Material conveying, dosing, and plastification - Mass flow rate - Avoiding defects - Blow head, blow mold, and blow molding process - APPENDIX : FORMULA SYMBOLS, ABBREVIATIONS, AND SHORT CODES Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36916

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Extrusion blow molding URL

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L'extrusion de films flexibles évolue / P. Veysset in CAOUTCHOUCS & PLASTIQUES, N° 810 (02/2003)  

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L'extrusion soufflage, technique complexe / Christian Gondard in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° HS (08/2008)

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Flexible guiding systems for cooling air / Lars Kraus in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 7 (2020)  

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Flexibly into the future / Anna Funk in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 10 (10/2012)

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A generation change in blown film extrusion / Thorsten Leopold in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 10 (10/2013)

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Heating of the mash seam / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 3 (2020)  

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Interfacial tension properties in biopolymer blends : from deformed drop retraction method (DDRM) to shear elongation rheology-application to blown film extrusion / Khalid Lamnawar in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 3 (07/2018)  

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Processes transparency in blown-film extrusion / Henning Wilms in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 5 (2022)  

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Le recyclage des films multicouches PA/PE / Vincent Hervais in CAOUTCHOUCS & PLASTIQUES, N° 804 (05/2002)

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Le soufflage prend solidement ses marques / Pauline Léna in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 864 (02/2009)

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The dynamic die / Heinz Gross in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 3 (03/2017)  

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Tilting technique improves centering and other features / Heinz Gross in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 3 (03/2012)

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To get the information flow in a row / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 10 (2020)  

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A toy challenges the engineers / Sebastian Depmeier in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 9 (09/2014)  

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