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Numerical study on the effect of the PET bottle thickness difference for blow molding process conditions  

Kim, Jeong-soon (Ajou motor college)
Kim, Jong-duck (KITECH, Bucheon digital molds and dies technology center)
Publication Information
대한공업교육학회지 / v.34, no.2, 2009 , pp. 321-330 More about this Journal
Abstract
This study presents the blow molding of injection stretch-blow molding process for PET bottle. The numerical analysis of the blow molding of PET bottle is considered in this paper using CAE with a view to minimize the thickness difference. In order to determine the design parameters and processing conditions in blow molding, it is very important to establish the numerical model with physical phenomenon. In this study, a shell model with thickness has been introduced for the purpose and blow simulations with 3-type blow process condition are carried out. The simulations resulted in the thickness distribution in good agreement with the physical phenomenon. Also, from the result of numerical analysis, we appropriately predicted the thickness distribution along the PET bottle wall and Using the result of numerical analysis we apply the preform design and blow molding process condition for optimization.
Keywords
Injection stretch-blow molding; preform design, thickness difference;
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