Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23811
Title: Simulation of transient process in melting section of reciprocating extruder
Authors: Yung, KL 
Xu, Y
Lau, KH
Keywords: Polymer
Reciprocating extruder
Simulation
Issue Date: 2002
Publisher: Elsevier
Source: Polymer, 2002, v. 43, no. 3, p. 983-988 How to cite?
Journal: Polymer (United Kingdom) 
Abstract: Plastic injection molding machine that can be classified as reciprocating extruders are among the most widely used machines in industry. However, most studies in the injector design were based on steady state models developed for extruders that involved no reciprocation. This over-simplified model leaves out the most important aspect of reciprocation. The authors of this paper have derived a transient melting model that takes care of the change from the conventional steady extrusion to that of a discontinuous transient process. This paper describes simulations conducted on the derived model to explain observation that cannot be explained by the steady extrusion model in practical experiments. The simulation was conducted by using parameters given in Donovan's experiment [Polym Engng, 11 (1971) 353]. The simulation results are found to qualitatively match with the experimental results. It proves the validity of the model. Simulation has also been conducted with the model on materials that their viscosities are temperature and shear rate dependent. The result has shown that screw rotation speed, screw axial movement speed, barrel thickness, barrel heat capacity, temperature of heater and polymer are factors affecting the melting speed and the transient effects.
URI: http://hdl.handle.net/10397/23811
ISSN: 0032-3861
EISSN: 1873-2291
DOI: 10.1016/S0032-3861(01)00586-9
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