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Modeling of Deformation Processes in Vacuum Thermoforming of a Pre-stretched Sheet

Modeling of Deformation Processes in Vacuum Thermoforming of a Pre-stretched Sheet Modeling of deformation processes in vacuum thermoforming for a preliminary stretched thermoplastic sheet (plug-assist vacuum thermoforming) is investigated in this paper. The model can be used for production of polymeric articles with minor wall-thickness variation. A nonlinear rheological model is implemented for developing the process model. It describes deformation process of a prestretched sheet at any phase of vacuum thermoforming process. This process is described by a set of deformation processes, each specified by appropriate boundary conditions. For model validation, a comparative analysis of the theoretical and experimental data is presented. The wall-thickness distributions obtained from modeling results corresponded well with experiments. A method for prediction and enhancement of the quality of the final products on the basis of wall-thickness distribution criterion has been established. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Polymer-Plastics Technology and Engineering Taylor & Francis

Modeling of Deformation Processes in Vacuum Thermoforming of a Pre-stretched Sheet

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References (18)

Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
0360-2559
eISSN
1525-6111
DOI
10.1080/03602550600948731
Publisher site
See Article on Publisher Site

Abstract

Modeling of deformation processes in vacuum thermoforming for a preliminary stretched thermoplastic sheet (plug-assist vacuum thermoforming) is investigated in this paper. The model can be used for production of polymeric articles with minor wall-thickness variation. A nonlinear rheological model is implemented for developing the process model. It describes deformation process of a prestretched sheet at any phase of vacuum thermoforming process. This process is described by a set of deformation processes, each specified by appropriate boundary conditions. For model validation, a comparative analysis of the theoretical and experimental data is presented. The wall-thickness distributions obtained from modeling results corresponded well with experiments. A method for prediction and enhancement of the quality of the final products on the basis of wall-thickness distribution criterion has been established.

Journal

Polymer-Plastics Technology and EngineeringTaylor & Francis

Published: Dec 1, 2006

Keywords: Deformation processes; Plug-assist vacuum thermoforming; Rheological model; Wall-thickness distribution

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