Temperature calculation for extruder screws with internal heat pipes

One possibility of directly influencing the temperature profile in an extruder is by tempering the screw. This method is currently used in double-screw extrusion and in certain specialized applications in the field of single-screw extrusion. Significant possibilities of influencing the temperature h...

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Bibliographic Details
Main Authors: Lakemeyer, C, Schöppner, V
Format: Conference Proceeding
Language:English
Subjects:
Extruders
Extrusion
Heat pipes
Screws
Temperature gradients
Tempering
Online Access:Get full text
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Summary:One possibility of directly influencing the temperature profile in an extruder is by tempering the screw. This method is currently used in double-screw extrusion and in certain specialized applications in the field of single-screw extrusion. Significant possibilities of influencing the temperature have been shown, for example, while processing PVC on counterrotating double-screw extruders [1]. However, until now, it has not been possible to theoretically model this effect. This paper will thus introduce a mathematical model which describes the effect of internal screw tempering on the temperature gradient of the material in the extruder, allowing processes using tempered screws to be better designed and dimensioned.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4873840