Evaluation of the thermal behaviour of injection moulds / I. Barros in INTERNATIONAL POLYMER PROCESSING, Vol. XV, N° 1 (03/2000)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XV, N° 1 (03/2000) . - p. 95-102 Titre : Evaluation of the thermal behaviour of injection moulds Type de document : texte imprimé Auteurs : I. Barros, Auteur ; S. F. C. F. Teixeira, Auteur ; A. M. Cunha, Auteur ; J. C. Teixeira, Auteur Année de publication : 2000 Article en page(s) : p. 95-102 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : It is well known that the thermal behaviour of moulds used for thermoplastics processing has an important effect on both the part quality and the process productivity. The present work reports a study on the evaluation of the relative effect of different geometric and operational parameters on the thermal behaviour of injection moulds. It uses a mathematical model developed to simulate the thermal transient exchanged during the entire moulding cycle. The model is based on a 2D Fourier equation, uses an adaptive grid and describes the thermal contact resistance at mould/polymer interface. The cooling time and the interface temperature distribution are calculated from the computed temperature field in the domain under study. Experimental data, obtained with an instrumented tool during typical production conditions, is used to validate the developed model. The evaluation analysis is based on the Taguchi methodology used to rank the relative effect of the parameters on the selected variables (cooling time, temperature distribution and number of cycles to reach the thermal steady state). Note de contenu : - THERMAL ANALYSIS - EXPERIMENTAL VALIDATION : Experimental facility - Typical results - EVALUATION OF MOULD THERMAL BEHAVIOUR : Geometry and processing conditions DOI : 10.3139/217.1579 En ligne : https://drive.google.com/file/d/1BCHZdZwADWrk9j8pg5wkVXHDQgOAFOlD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16088 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001011	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Mold for manipulation microstructure development / C. A. Silva in INTERNATIONAL POLYMER PROCESSING, Vol. XX, N° 1 (03/2005)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XX, N° 1 (03/2005) . - p. 27-34 Titre : Mold for manipulation microstructure development Type de document : texte imprimé Auteurs : C. A. Silva, Auteur ; A. M. Cunha, Auteur ; G. R. Dias, Auteur ; J. C. Viana, Auteur Année de publication : 2005 Article en page(s) : p. 27-34 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The control of microstructure development in injection molding had attracted several important studies in the recent years, being well established that the thermo-mechanical environment imposed to the polymer melt depends on the material properties, molding geometry and processing conditions. An entirely new design of an injection mold RCEM (Rotation, Compression and Expansion Mold) was developed and implemented, allowing for a wide variation of the filling and packing conditions in a flat disk geometry. One of the cavity walls (the ejection side) can rotate or move with a linear movement during the injection and holding stages. This enables several filling sequences and the variation of the cavity thickness. Two electric servomotors are use to directly drive those movements. Two temperatures and pressure sensors allow for the on-line process monitoring. Several examples of the potential uses of the RCEM are shown for the cases of amorphous and semicrystalline polymers. Results obtained with short-fiber reinforced polypropylene are also presented. DOI : 10.3139/217.1847 En ligne : https://drive.google.com/file/d/1ckYzL1g4_lY2MW-bVju_y0OVRWXDgCMB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3087 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
000687	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)