Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A study on the technology of in-mold punching process for integrated hole piercing of plastic hollow parts

플라스틱 중공부품의 일체화 성형을 위한 인몰드 펀칭 공정기술에 관한 연구

  • Lee, Sung-Hee (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology)
  • 이성희 (한국생산기술연구원 금형성형연구부문)
  • Received : 2021.09.14
  • Accepted : 2021.12.31
  • Published : 2021.12.31
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Abstract

A study on in-mold punching technology for hole piercing during molding of hollow plastic parts was conducted. Considering the non-linearity of the HDPE plastic material, mechanical properties were obtained according to the change in temperature and load speed. A standard specimen for the in-mold punching test was designed to implement the in-mold punching process, and the specimen was obtained through injection molding. In order to analyze the influence of process variables during in-mold punching, an in-mold punching mold capable of controlling variables such as temperature and support pressure of the specimen was designed and manufactured. Mold heating characteristics were confirmed through finite element analysis, and punching simulations for changes in process conditions were performed to analyze punching characteristics and reflected in the experiment. Through simulations and experiments, it was found that the heating temperature, punch shape, punching speed, and pressure of the back side of the specimen were very important during in-mold punching of HDPE materials, and optimal conditions were acquired within a given range.

Keywords

Acknowledgement

본 연구는 "중소벤처기업부 기술혁신개발 시장대응형기술개발사업(S2978687(SE210099))"에 의해 수행되었습니다.

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