Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Finite element analysis of a injection blow molding process for the thick-walled PET bottle

후육 벽 PET 용기에 대한 사출 블로우 성형의 유한요소해석

  • Hong, Seok-Kwan (Korea Institute of Industrial Technology, Molds & Dies R&D Group) ;
  • Song, Min-Jae (Korea Institute of Industrial Technology, Molds & Dies R&D Group) ;
  • Ko, Young-Bae (Korea Institute of Industrial Technology, Molds & Dies R&D Group) ;
  • Cha, Baeg-Soon (Korea Institute of Industrial Technology, Molds & Dies R&D Group)
  • 홍석관 (한국생산기술연구원 금형기술그룹) ;
  • 송민재 (한국생산기술연구원 금형기술그룹) ;
  • 고영배 (한국생산기술연구원 금형기술그룹) ;
  • 차백순 (한국생산기술연구원 금형기술그룹)
  • Received : 2018.10.30
  • Accepted : 2018.12.01
  • Published : 2018.12.01
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Abstract

Plastic containers which provides the opportunity to reduce transportation costs are lighter and less brittle than glass containers. As a results, efforts to replace glass with plastic are ongoing. The blow molding method is a typical approach in producing plastic containers. Single-stage injection blow molding (ISBM) is one of the blow molding methods. However, the difficulty in controlling the temperature during the injection molding process is considered its main disadvantage. In this study, ISBM process analysis of relatively thick walled containers such as cosmetic containers is carried out. The initial temperature distribution of the preform is deemed to be the most influential factor in the accuracy of blow molding for the thick vessel. In order to accurately predict this, all heat transfer processes of the preform are considered. The validity of this analytical procedure is verified by comparing the cross-sectional thickness with the actual product. Finally, the validated analytical method is used to evaluate the factors affecting the thickness of the final molded part. The ISBM analysis technique for thick walled vessels developed through this study can be used as an effective predictor for preform design and blow process.

Keywords

Acknowledgement

Grant : 유리소재 대체를 위한 후육 PET 용기용 ISBM 기술개발

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