A NUMERICAL-MODEL FOR SINGLE-SCREW EXTRUSION WITH POLY(VINYL CHLORIDE) (PVC) RESINS

Citation
F. Thibault et al., A NUMERICAL-MODEL FOR SINGLE-SCREW EXTRUSION WITH POLY(VINYL CHLORIDE) (PVC) RESINS, Polymer engineering and science, 34(18), 1994, pp. 1377-1386
Citations number
18
Categorie Soggetti
Polymer Sciences","Engineering, Chemical
ISSN journal
00323888
Volume
34
Issue
18
Year of publication
1994
Pages
1377 - 1386
Database
ISI
SICI code
0032-3888(1994)34:18<1377:ANFSEW>2.0.ZU;2-3
Abstract
A computer model has been developed to simulate the behavior of molten polymer in the melt conveying zone of extruders. This model, based on a hybrid finite difference/finite element resolution of the equations of change governing momentum and heat transfer, allows the prediction of the pressure profile while accounting for wall end effects as well as the solid bed velocity. Simulation results are compared with analy tical and finite difference method results found in the literature. A fairly good agreement is obtained in the case of low density polyethyl ene. Numerical tests are also carried out with rigid poly(vinyl chlori de) compound used for window profile extrusion. The good agreement fou nd between the predictions and experimental measurements obtained on a n industrial extruder confirms the performance of the proposed model.