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Experimental study and numerical simulation of the injection stretch/blow molding process

Identifieur interne : 000428 ( France/Analysis ); précédent : 000427; suivant : 000429

Experimental study and numerical simulation of the injection stretch/blow molding process

Auteurs : F. M. Schmidt [France] ; J. F. Agassant [France] ; M. Bellet [France]

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Mots-clés :

Abstract

The injection stretch/blow molding process of PET bottles is a complex process, in which the performance of the bottles depends on various processing parameters. Experimental work has been conducted on a properly instrumented stretch/blow molding machine in order to characterize these processing parameters. The objective being a better understanding of the pressure evolution, preform free inflation has been processed and compared with a simple thermodynamic model. In addition, a numerical model for the thermomechanical simulation of the stretch/blow molding process has been developed. At each time step, mechanical and temperature balance equations are solved separately on the current deformed configuration. Then, the geometry is updated. The dynamic equilibrium and the Oldroyd B constitutive equations are solved separately using an iterative procedure based on a fixed‐point method. The heat transfer equation is discretized using the Galerkin method and approximated by a Crank‐Nicholson's scheme over the time increment. Successful free blowing simulations as well as stretch/blow molding simulations have been performed and compared with experiments.


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DOI: 10.1002/pen.10310


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ISTEX:6E01BDC341F9FDFD845070C0E13BC415EE04006B

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<term>Drawing</term>
<term>Ethylene terephthalate polymer</term>
<term>Experimental test</term>
<term>Finite element method</term>
<term>Injection molding</term>
<term>Manufacturing process</term>
<term>Mechanical properties</term>
<term>Modeling</term>
<term>Numerical simulation</term>
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<term>Property processing relationship</term>
<term>Temperature effect</term>
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<term>Bouteille</term>
<term>Effet température</term>
<term>Ethylène téréphtalate polymère</term>
<term>Etirage</term>
<term>Modélisation</term>
<term>Moulage injection</term>
<term>Moulage soufflage</term>
<term>Méthode élément fini</term>
<term>Optimisation</term>
<term>Procédé combiné</term>
<term>Procédé fabrication</term>
<term>Propriété mécanique</term>
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