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Dynamic performance of single-screws of different configurations / A. C.-Y. Wong in INTERNATIONAL POLYMER PROCESSING, Vol. XIV, N° 1 (03/1999)
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Titre : Dynamic performance of single-screws of different configurations Type de document : texte imprimé Auteurs : A. C.-Y. Wong, Auteur ; T. Liu, Auteur ; J. C. M. Lam, Auteur ; F. Zhu, Auteur Année de publication : 1999 Article en page(s) : p. 35-43 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : A 45 mm diameter single-screw "transparent" extruder was employed for an investigation on the dynamic Performance of screws of different configurations. The extruder had eight glass Windows installed along the entire metal barrel which enabled Visual observation to be easily made. It was demonstrated, with this extruder, that pressure profile appeared to be an important factor for screw performance such as throughput rate, residence time, mixing characteristics, break-up of solid-bed, etc. The full-flight screw had the lowest pressure profile among all the screws tested, and its performance was found to be generally inferior to that of the mixing screws. The Darneil and Mol solid plug flow theory was shown to be applicable only to the mixing screws for the solid flow behaviour in the entire solid conveying section. The secondary flight ofthe barrier screw was found to effectively suppress solid bed break-up, but only at low screw speed. A screw with a Maddock mixing device was found to have the highest throughput rate. Other findings were believed to be of practical significance in the screw design. Note de contenu : - Throughput rate
- Pressure distribution
- Axial conveying rate in the solid conveying section (L1) and the compression section (L2)
- Residence time (RT) and residence time distribution (RTD)
- Dynamic behaviours of solid-bed break-up
- Dispersion of colour masterbatchesDOI : 10.3139/217.1527 En ligne : https://drive.google.com/file/d/16i6zFEFuW8WwbzfZNr7y4ff1BVcymQdv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16109
in INTERNATIONAL POLYMER PROCESSING > Vol. XIV, N° 1 (03/1999) . - p. 35-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001007 - Périodique Bibliothèque principale Documentaires Disponible Prediction of screw length required for polymer melting and melting characteristics / T. Liu in INTERNATIONAL POLYMER PROCESSING, Vol. XVI, N° 2 (06/2001)
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Titre : Prediction of screw length required for polymer melting and melting characteristics Type de document : texte imprimé Auteurs : T. Liu, Auteur ; A. C.-Y. Wong, Auteur ; F. Zhu, Auteur Année de publication : 2001 Article en page(s) : p. 113-123 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The previous study on the dynamic processing characteristics of co-rotating twin-screw extruder based on a visible technique (which employed a "transparent" extruder) performed by the authors Wong et al. [1 and 2] had enabled a quantitative treatment to be carried out in the present paper on the melting behaviour of polymer during an extrusion process. The qualitative analysis performed previously [1] had led to the development of a melting model which was capable of revealing some of the fundamental melting behaviour. The model also enabled the determination of the length of screw required for completing melting (Zr). Melting characteristics in terms of effects of solid feeding rate, temperature, screw speed and channel depth on the predicted Zr were discussed to further our understanding on melting performance of polymer melt in intermeshing corotating twin-screw extruder. Note de contenu : - Physical melting characteristics in a partially filled screw channel
- Physical melting model for partially filled screw channel
- Mathematical modelDOI : 10.3139/217.1639 En ligne : https://drive.google.com/file/d/163y9EuE8WP77Asui4qBfIBdED-Dwg4ot/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15891
in INTERNATIONAL POLYMER PROCESSING > Vol. XVI, N° 2 (06/2001) . - p. 113-123[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001016 - Périodique Bibliothèque principale Documentaires Disponible