Flow Balancing in Extrusion Dies for Thermoplastic Profiles

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

J. M. Nóbrega (Autor) Outra; O. S. Carneiro (Autor) Outra; P. J. Oliveira (Autor) Outra; Fernando T. Pinho (Autor) FEUP

Revista

Título: International Polymer Processing

Vol. 18 Nº 3

Páginas: 298-306

ISSN: 0930-777X

Editora: Walter De Gruyter

Outras Informações

ID Authenticus: P-00J-44N

DOI: 10.3139/217.1745

Abstract (EN): To achieve a specified geometry for an extruded profile, together with a minimal degree of internal stresses, flow balancing of the die is required. To attain this objective, the flow along a profile die channel must be accurately described, and this demands a computational code able to predict complex 3D non-isothermal flow patterns. In this work new methodologies for flow balancing are implemented and illustrated. The design code developed to carry out the automatic search of a final geometry consists of an optimisation routine coupled with geometry and mesh generators and a 3D computational code based on the finite volume method. The issues discussed and described here encompass recent developments, namely the implementation of two alternative optimisation algorithms for the automatic search of a final solution, the enhancement of the strategies previously developed to balance the flow, some improvements in the routine used to generate the mesh and the adoption of a progressive mesh refinement technique. The examples show that the proposed methodology performs well and the solution is attained in just a few minutes of calculation without any user intervention during the calculation process.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9