[article]
| Titre : |
Solidification criterion on shrinkage predictions for semi-crystalline injection moulded samples |
| Type de document : |
texte imprimé |
| Auteurs : |
A. J. Pontes, Auteur ; R. Pantani, Auteur ; G. Titomanlio, Auteur ; A. S. Pouzada, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 284-290 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
The phenomenon of shrinkage in injection moulding is particularly evident in semi-crystalline polymers. During cooling, these materials experience a transition from a completely amorphous to a partially crystalline status, which results in a severe change of all material characteristics, including volumetric parameters. In this study an iPP was injection moulded in a rectangular impression (120mm x 630mm x 62 mm) with a 1.5mm thick line gate. The influence of holding pressure and time, and geometry constraints on linear shrinkage was explored. In-mould shrinkage was measured by means of a recent method based on strain gauges. Experimental results are compared with predictions for shrinkage obtained by C-Mold and a code developed at the University of Salerno, which takes into account crystallisation kinetics. The solidification criterion resulted to be extremely relevant for shrinkage predictions. |
| DOI : |
10.3139/217.1594 |
| En ligne : |
https://drive.google.com/file/d/1ODoaWDUb7LGE1p3TEFUrsf1VD0ZEYdf0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15833 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XV, N° 3 (09/2000) . - p. 284-290
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Solidification criterion on shrinkage predictions for semi-crystalline injection moulded samples in INTERNATIONAL POLYMER PROCESSING, Vol. XV, N° 3 (09/2000)
