Abstract
A co-extruder with three separate barrels operated by a single ram has been designed to produce trilayer tubes semi-continuously. A vital step in the design was to predict the pressure required to generate a sufficiently high extrudate velocity while being able to retain the extrudate integrity. A physically based model was used to predict the pressure drops in the co-extrusion process at three different extrusion velocities for five pastes with different rheological characteristics. In general, predicted and measured values were in good agreement. Other important aspects in the co-extruder design, such as velocity and pressure matching of different Row streams are also highlighted. Trilayer ceramic tubes were successfully produced from the designed co-extruder. (C) 2001 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 883-892 |
Number of pages | 10 |
Journal | Journal of the European Ceramic Society |
Volume | 21 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1 Jul 2001 |
Keywords
- clays
- shaping
- extrusion
- Al2O3
- plasticity
- composites