| Titre : |
Residual wall thickness study of variable crosssection tube in water-assisted injection molding |
| Type de document : |
texte imprimé |
| Auteurs : |
J. G. Yang, Auteur ; X. H. Zhou, Auteur ; Q. Niu, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 584-590 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Epaisseur -- Mesure
Fluides, Dynamique des
Matières plastiques
Matières plastiques -- Moulage par injection assistée par eau
Reynolds, Contrainte deDans la dynamique des fluides, la tension de Reynolds (oun contrainte de Reynolds) est le tenseur des contraintes dans un fluide issu de l'opération moyenne sur les équations de Navier-Stokes pour tenir compte des turbulences et des fluctuations d'un fluide dynamique.
Tubes
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Residual wall thickness is an important measure of the quality of water-assisted injection molding (WAIM) parts. Based on the traditional injection molding model, Reynolds stress was introduced into the WAIM model for the turbulent characteristics of high pressure water. In addition, residual wall thickness was computed by a computational fluid dynamics (CFD) method, and the results matched well with experimental data. The results show that the hollowed core ratio changes from small to large in the first half of water penetration, while in the latter half it is just the opposite. Difference of the residual wall thickness is larger at the large-diameter position of a part than other position. Residual wall thickness is mainly affected by water injection pressure, delay time, melt temperature, mold temperature and amount of short shot, in which the amount of short shot is the most obvious. |
| Note de contenu : |
- MODEL AND METHODS : Physical model - Governing equations - Boundary conditions - Solution procedure
- RESULTS AND DISCUSSION : Water penetration behavior - Comparison of simulations and experiments - Effects of processing parameters on hollowed core ratio |
| DOI : |
10.3139/217.2612 |
| En ligne : |
https://drive.google.com/file/d/1sMfahW9U3FA3PwpVweL9qHcER-HmwoA1/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16641 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 5 (11/2012) . - p. 584-590
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