Modeling and Optimization of Injection Molding Process Parameters for Thin-Shell Plastic Parts

Abstract

This paper deals with the application response surface methodology (RSM) integrating with statistical technique to discuss variation of warpage and tensile stress properties depended on injection molding parameters during production of thin-shell plastic components. By applying RSM analysis, a mathematical predictive model of the warpage and tensile stress properties was developed in terms of the injection molding parameters. The trim operation has been optimized for a given injection molding condition by desirability function approach and the response surface contours were constructed for determining the optimum conditions. Additionally, the analysis of variance is also applied to identify the most significant factor.

Keywords:

• Injection molding
• Optimization
• RSM
• Tensile stress
• Warpage

ACKNOWLEDGMENT

The authors would like to thank the National Science Council of the Republic of China, for financially supporting this research (Contract No. NSC97-2221-E-159-006) and Ming Hsin University of Science and Technology (Contract No. MUST-97-ME-009).