| Titre : |
Experimental and numerical investigation of shrinkage and warpage of a U-shaped injection molded part |
| Type de document : |
texte imprimé |
| Auteurs : |
Stefan Kleindel, Auteur ; R. Eder, Auteur ; H. Schretter, Auteur ; C. Hochenauer, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 68-81 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Composites à fibres de verre
Composites à fibres de verre -- Moulage par injection
Gauchissement (matériaux)
Mesure
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polyoxyméthylène
Retrait au moulage
Simulation par ordinateur
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Prediction of shrinkage and warpage of injection molded plastic parts is a key issue of injection molding simulation. In the present work a U-shaped part is investigated experimentally and by means of state of the art injection molding simulation software. The part has thick walls in the corner where inner defects such as voids and porous zones may appear. Experiments and simulations were performed with POM and glass fiber reinforced polyamide. Measurements of pressure in the cavities and temperature profiles around the cavities were used to validate the numerical model. In case of POM it was found that warpage predictions are way off when the void volume is high and in good agreement when the void volume is minimized. No such correlation was observed in case of fiber reinforced materials. Here, shrinkage and warpage are dominated by the fiber orientation state with minor influence of the processing conditions. Predicted warpage was found to be extremely dependent on the used closure approximation. |
| Note de contenu : |
- PROBLEM DESCRIPTION
- EXPERIMENTAL : Mold design - Measurements
- NUMERICAL : Computational mesh - Material data - Boundary conditions
- RESULTS : Experimental results - Simulation results - Discussion |
| DOI : |
10.3139/217.3148 |
| En ligne : |
https://drive.google.com/file/d/1Lw0SrrPweDXNzbZ_k8OjnAguT44jH1tU/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25770 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 1 (03/2016) . - p. 68-81
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Experimental and numerical investigation of shrinkage and warpage of a U-shaped injection molded part in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 1 (03/2016)
