Study on Preform Design for Reducing Weight of PET Packaging Bottle

고분자 패키징 용기 중량 절감을 위한 프리폼 설계에 관한 연구

  • 김정순 (아주자동차대학 자동차계열)
  • Published : 2010.01.31


This study presents the preform injection molding and the blow molding of the injection stretch-blow molding process for PET bottles. The numerical analysis of the injection molding and the blow molding of a preform is considered in this paper using CAE with a view to minimize the warpage and the thickness. In order to determine the design parameters and processing conditions in injection/blow molding, it is very important to establish the numerical model with physical phenomenon. In this study, a three dimensional model has been introduced for the purpose and flow simulations of filling, post-filling and cooling process are carried out. The simulations resulted in the warpage in good agreement with the measurements. Also, from the result of numerical analysis, we appropriately predicted the warpage, deformation and thickness distribution along the product walls.


Preform;Injection molding;Blow molding;PET bottles


  1. F. M. Schmidt, J. F. Agassant, and M. Bellet, Simul. Mater. Proc. Numiform 92, 383(1992)
  2. W. P. Haessly and M. E. Ryan, J. Polym. Eng. Sci. 33, 1279(1993)
  3. W. P. Haessly and M. E. Ryan, ANTEC ' 89, 934(1989)
  4. K. Hartwig and W. Michaeli, Simul. Mater. Proc. Numiform 95, 1029(1995)
  5. J. P. MCEVOY, C. G. ARMSTRONG, and R. J. CRAWFORD " Simulation of the Stretch Blow Molding Process of PET Bottles " Advancds in Polymer Technology, Vol.17, NO.4, 339-352, 1998<339::AID-ADV5>3.0.CO;2-S
  6. Z. J. Yang, E. Harkin-Jones, G. H. Menary, C. G. Armstrong " Coupled temperature-displacement modelling of injection stretch-blow moulding of PET bottles using Backley model " Journal of Materical Processing Technology 153-154 (2004) 20-27
  7. SONG WANG and AKITAKE MAKINOUCHI " Three-Dimensional Viscoplastic FEM Simulation of a Stretch Blow Molding Process " Advancds in Polymer Technology, Vol.17, No. 3, 189-202, 1998<189::AID-ADV1>3.0.CO;2-O
  8. Z. J. YANG, E. HARKIN-JONES, G.H. MENARY, and C. G. ARMSTRONG " A Non-Isothermal Finite Element Model for Injection Stretch-Blow Molding of PET Bottles With Parametric Studies " POLYMER ENGINEERING AND SCIENCE, JULY 2004, VOL.44, NO.7, pp.1379-1390