Extrusion Uniformity Optimization for Shaping Channel Design in Large-Scale Die-Plate of Underwater Pelletizing

Abstract:

As an important component of large-scale extruder system for polymer material, Die-plate can be regarded as the final determinant for pelletization uniformity. Polymer melt was shaped in shaping channels and extruded from die-holes from Die-plate and then be diced. The design of shaping channels directly influences the uniformity for polymer-melt extrusion pressure and extrusion velocity of different die holes. In this paper, a three-dimensional flow model for polymer flow in Die-plate channel was presented, and then finite element simulation was used to analyze the distribution of extrusion velocity in each die-hole. Based on simulation result, a BP neural network model was applied to analyze the relationship between geometry factors of Die-plate, such as length of shaping channels, die hole extrusion velocity distribution, and extrusion uniformity. This optimization method can be used in the design of Die-plate to improve effect and quality of actual polymer production and processing.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 562-566
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.562
• Online since: January 2013
• Authors: Bing Zhang, Xiao Feng Liu, Chao Bi
• Keywords: Extrusion Uniformity, Numerical Simulation, Optimization Design, Shaping Channel

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