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http://dx.doi.org/10.7473/EC.2011.46.1.054

Computer Simulation of Die Extrusion for Rubber Compound Using Simplified Viscoelastic Model  

Kim, J. H. (Graduate School of NID Fusion Technology, SeoulTech)
Hong, J. S. (Graduate School of NID Fusion Technology, SeoulTech)
Choi, S. H. (Hankook Tire Co.)
Kim, H. J. (Hankook Tire Co.)
Lyu, M. Y. (Department of Product Design and Manufacturing Engineering, SeoulTech)
Publication Information
Elastomers and Composites / v.46, no.1, 2011 , pp. 54-59 More about this Journal
Abstract
One of the viscoelastic flow behaviors during profile extrusion is the swelling of extrudate. In this study, die swell of rubber compound in the capillary die have been investigated through experiment and computer simulation. Simplified viscoelastic model and non-linear differential viscoelastic model such as PTT model have been used in the computer simulation. The simulation results have been compared with experimental data. Experiment and simulation have been performed using fluidity tester and commercial CFD code, Polyflow respectively. Die swells predicted by two models showed good agreement with experimental results. Pressure and velocity distribution, and circulation flow at the corner of reservoir have been well predicted by PTT model. Simplified viscoelastic model can not predict circulation flow at the corner of reservoir. However this model has an advantage in computation time compare with full viscoelastic model, PTT model.
Keywords
capillary die; die swell; PTT model; simplified viscoelastic model; circulation flow;
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