Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A Study on Mechanical Properties Evaluation of Fiber-reinforced Plastic Cellular Injection-molded Specimens for the Development of High-strength Lightweight MHEV Battery Housing Molding Technology

고강성 경량 MHEV 배터리 하우징 성형기술개발을 위한 섬유강화 플라스틱 발포 사출 시험편의 기계적 물성평가에 관한 연구

  • Eui-Chul Jeong (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology) ;
  • Yong-Dae Kim (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology) ;
  • Jeong-Won Lee (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology) ;
  • Sung-Hee Lee (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology)
  • 정의철 (한국생산기술연구원 금형성형연구부문) ;
  • 김용대 (한국생산기술연구원 금형성형연구부문) ;
  • 이정원 (한국생산기술연구원 금형성형연구부문) ;
  • 이성희 (한국생산기술연구원 금형성형연구부문)
  • Received : 2023.09.20
  • Accepted : 2023.09.30
  • Published : 2023.09.30
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Abstract

The fiber-reinforced plastics and cellular injection molding process can be used to efficiently reduce the weight of battery housing components of mild hybrid electronic vehicles(MHEV) made of metal. However, the fiber orientation of fiber-reinforced plastics and the growth of foaming cells are intertwined during the injection molding process, so it is difficult to predict the mechanical properties of products in the design process. Therefore, it is necessary to evaluate the mechanical properties of the materials prior to the efficient stiffness design of the target product. In this study, a study was conducted to evaluated the mechanical properties of fiber reinforced cellular injection-molded specimens. Two types of fiber-reinforced plastics that can be used in the target product were evaluated for changes in tensile properties of cellular injection-molded specimens depending on the foaming ratio and position from the injection gate. The PP and PA66 specimens showed a decrease of tensile modulus and strength of approximately 30% and 17% depending on the foaming ratio, respectively. Also, the tensile strength decreased approximately 26% and 17% depending on the position from the injection gate, respectively. As a result, it was confirmed that the PP specimens have a significantly mechanical property degradation compared to the PA66 specimens depending on the foaming ratio and position.

Keywords

Acknowledgement

본 연구는 2023년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임 ('20019244')

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