| 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 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 3 (2022) . - p. 56-59
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On the wave to successful mixing in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 3 (2022)
