On the wave to successful mixing / Maximilan Frank in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 3 (2022)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 3 (2022) . - p. 56-59 Titre : On the wave to successful mixing : New concepts for extrusion screws Type de document : texte imprimé Auteurs : Maximilan Frank, Auteur ; Marius Dörner, Auteur ; Christian Marschik, Auteur ; Volker Schöppner, Auteur Année de publication : 2022 Article en page(s) : p. 56-59 Langues : Anglais (eng) Catégories : Mélange Polyéthylène haute densité Vis d'extrusion Index. décimale : 668.4 Plastiques, vinyles Résumé : On the test stand : the University of Paderborn, Germany, investigated conventional and new concepts for extrusion screws in order to achieve higher throughputs while retaining machine sizes. The energy-transfer screws, a further development of the wave screw, scored particularly well. Note de contenu : - Mixing sequences in single-screw extrusion - Mixing quality under the microscope - The throughputs of the different screw concepts - The wave-screw : high mixing quality and large degree of freedom - Fig. 1 : Unwound channel geometry of a double-wave and an energy-transfer screw - Fig. 2 : Schematic representation of the dispersive and distributive mixing mechanisms - Fig. 3 : . Exemplary estimate of gray value distribution as a histogram (left) with thin sections belonging to barrier and energy-transfer screws at 100 rpm - Fig. 4 : Channel cut of the simulation in the melting zone of the screw - Fig. 5 : Scheme of the particle tracking method as well as extracted and triangulated particle distribution - Fig. 6 : Exemplary application of the bin counting method. Source: Paderborn University, graphic - Fig. 7 : Exemplary triangulation of point distribution by Delaunay triangulation - Fig. 8 : Qualitative comparison between the expreimentally determined thin sections at the end of the screw and the triangulated, simulatively determined particle distributions at 100 rpm - Table 1 : Comparison of the throughputs of HDPE achieved by the different screw concepts given completely melted polymer flow En ligne : https://drive.google.com/file/d/1Fa6A114bSqKEbTBnnReH2V8Xlz7s0n5q/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37716 [article]

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