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Application of a response surface method to the optimal design of the wall temperature profiles in extrusion die

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Abstract

A new approach to the optimal design of the die wall temperature profile in polymer extrusion processes is presented. In this approach, optimization of the design variables is conducted by a Response Surface Method (RSM) and the Sequential Quadratic Programming (SQP) algorithm. Design of experiment (DoE) needed for the construction of the response surface is used to evaluate the objective and the constraint functions on the basis of a finite element method (FEM). Two designs of experiments are used and the performances of the optimization results are compared with respect to efficiency and ability to obtain a global optimum. Typically, for extrusion die design, the objective function states that the average velocity across the die exit is uniform. Constraints are used to limit the pressure drop in the die. For this purpose, we optimize the wall temperature profile of a coat hanger die in a heterogeneous way, (i.e. the wall temperature may not be constant in the entire die). The melt temperature enables us to locally control the viscosity, which influences the flows in the various zones. The effect of the design variables in the objective and constraint functions is investigated using Taguchi method. The flow analysis results are then combined with an automatic optimization algorithm to provide a new profile of the die wall temperature distributions.

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Authors and Affiliations

  1. Institut Supérieur d’ingénierie de la conception, GIP-InSIC (ERMeP), Laboratoire d’Energétique et de Mécanique Théorique et Appliquée (LEMTA), 27 Rue d’Hellieule, 88100, Saint-Dié, France

    Nadhir Lebaal & Stephan Puissant

  2. Université de Toulouse, Institut Clément ADER, Mines Albi, CROMeP, Campus Jarlard- Route de Teillet, 81013, Albi Cedex 9, France

    Fabrice Schmidt

Authors
  1. Nadhir Lebaal
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  2. Stephan Puissant
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  3. Fabrice Schmidt
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Correspondence to Nadhir Lebaal.

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Lebaal, N., Puissant, S. & Schmidt, F. Application of a response surface method to the optimal design of the wall temperature profiles in extrusion die. Int J Mater Form 3, 47–58 (2010). https://doi.org/10.1007/s12289-009-0416-x

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  • DOI: https://doi.org/10.1007/s12289-009-0416-x

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