A simple model for heat transfer inside an extrusion die

A simple model based on the lubrication approximation has been developed to analyze heat transfer of power‐law fluids inside an extrusion die. This model can effectively predict the influence of temperature variations and other production alterations on flow uniformity. The predictions of this model...

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Bibliographic Details
Published in:Polymer engineering and science 1995-11, Vol.35 (21), p.1713-1724
Main Authors: Wu, Ping-Yao, Huang, Lee-May, Liu, Ta-Jo
Format: Article
Language:English
Subjects:
Absorption
Analysis
Applied sciences
Evaluation
Exact sciences and technology
Extrusion moulding
Extrusion process
Lubrication and lubricants
Machinery and processing
Moulding
Plastics
Polymer industry, paints, wood
Taps and dies
Technology of polymers
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Summary:A simple model based on the lubrication approximation has been developed to analyze heat transfer of power‐law fluids inside an extrusion die. This model can effectively predict the influence of temperature variations and other production alterations on flow uniformity. The predictions of this model are compared with those based on three‐dimensional finite element simulation, and the agreement is satisfactory. The optimal design concept can be incorporated into this model so that a specially designed choker bar can be inserted into the extrusion die to reduce flow nonuniformities. The shape of the choker bar is initially suggested by the lubrication model; minor corrections through the three‐dimensional finite element simulation are then introduced so that a choker bar can be properly constructed to eliminate flow nonuniformities.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.760352108