| Titre : |
Accurate simulation of the four modes of post-die extrudate shape distortion |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Gupta, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 69-78 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chlorure de polyvinyle
Filières d'extrusion
Fluides, Mécanique des
Matières plastiques -- Extrusion
Rhéologie
Simulation par ordinateur
Terpolymère acrylonitrile butadiène styrène
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
A combined flow, thermal and structural analysis is employed to simulate post-die extrudate distortion in different profile dies. All four factors which can cause extrudate distortion, namely, non uniform exit velocity distribution, extrudate shrinkage, extrudate draw down, and deformed shape of the calibrator or sizer profile, are simulated. To analyze the effect of exit velocity variation on extrudate distortion, the parameterized geometry of a simple profile die is optimized using an extrusion die optimization software. The simulation results presented for a bi-layer profile die successfully demonstrate how gradually changing profile shape in successive calibrators/sizers can be used to simplify the die design for extrusion of complex profiles. The predicted extrudate shape and layer structure for the bi-layer die are found to accurately match with those in the extruded product. |
| Note de contenu : |
- INTRODUCTION : Non-uniform exit velocity - Cooling shrinkage - Extrudate draw down - Calibrator or sizer profile
- GOVERNING EQUATIONS : Fluid flow and structural mechanics equations - Extrusion die optimization
- MATERIAL PROPERTIES
- RESULTS AND DISCUSSION : Effect of velocity distribution at die exit
on extrusion distortion - Effect of cooling shrinkage on extrusion distortion - Effect of post-die draw down on extrudate distortion - Effect of calibrator or sizer profile on extrudate distortion
- Table 1 : Properties of ABS and PVC used in this work |
| DOI : |
https://doi.org/10.1515/ipp-2020-3995 |
| En ligne : |
https://drive.google.com/file/d/1qY_XNA26AXe00d8KSO7vnQzaDLURTLLl/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36352 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 1 (2021) . - p. 69-78
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