Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Comparison of Injection Molding Characteristics according to Thickness Variations of Preform for PET bottle

  • Kim, Nam Hyun (Dept. of Mechanical Design and Manufacturing Engineering, Seoul National University of Science & Technology) ;
  • Woo, In Young (Dept. of Mechanical Design and Manufacturing Engineering, Seoul National University of Science & Technology) ;
  • Nam, Kyung Woo (Samyang Packaging Co.) ;
  • Yeon, Baek Rim (Samyang Packaging Co.) ;
  • Kim, Mi Rae (Samyang Packaging Co.) ;
  • Lyu, Min-Young (Dept. of Mechanical Design and Manufacturing Engineering, Seoul National University of Science & Technology)
  • Received : 2021.09.06
  • Accepted : 2021.09.17
  • Published : 2021.09.30
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Abstract

Due to the problem of environmental pollution by plastics, it is necessary to decrease their consumption. In the case of PET bottles, it is essential to reduce the thickness of the bottle for the reduction of plastic used. For manufacturing PET bottles with reduced thickness, it is a prerequisite to design a preform with reduced thickness and study its molding capability. In this study, the injection molding capability was investigated after reducing the body thickness of the preform to 15% and 20%, respectively, for the two preform models currently in use. Injection molding analysis was performed on the existing models and on the models for reduced weight, under the molding conditions of the existing models. Using the computed results, temperature distribution, pressure distribution, deformation and clamping force were compared. Based on the analysis, the injection conditions of the preform model with less thickness were discussed.

Keywords

Acknowledgement

본 결과물은 환경부의 재원으로 한국환경산업기술원의 재활용 저해제품 순환이용성 개선 기술개발사업의 지원을 받아 연구되었습니다(2020003080006).

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