Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Computer Simulation of Rubber Flow for Mold Profile in Rubber Shaping Process

고무 성형 공정에서 금형 형상에 따른 고무 흐름의 컴퓨터 모사

  • Lee, Dan Bi (Department of Product Design and Manufacturing Engineering, Graduate School, Seoul National of Univ. of Science and Technology) ;
  • Lee, Min A (Department of Product Design and Manufacturing Engineering, Graduate School, Seoul National of Univ. of Science and Technology) ;
  • Choi, Sung Hyun (Hankook Tire Central R & D Center) ;
  • Lyu, Min-Young (Department of Product Design and Manufacturing Engineering, Graduate School, Seoul National of Univ. of Science and Technology)
  • 이단비 (서울과학기술대학교 대학원 제품설계금형공학과) ;
  • 이민아 (서울과학기술대학교 대학원 제품설계금형공학과) ;
  • 최성현 (한국타이어 중앙연구소) ;
  • 류민영 (서울과학기술대학교 대학원 제품설계금형공학과)
  • Received : 2014.07.29
  • Accepted : 2014.08.25
  • Published : 2014.09.30
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Abstract

The tire tread is contacted with road surface directly. It gives significant effect on the breaking conditions, traction, noise and so on. The tread having grooves with complex geometry is molded by shaping process. The flow behavior of tread rubber in a mold affects the quality of the tread and it leads to the running performance of automobile. In this study, the flow behavior of rubber in shaping process has been investigated by computer simulation. The objective of flow simulation is the design of tread shape based on the contact of rubber on the mold surface and flow behavior of rubber. Different sequences of contact of rubber on the mold surface and flow behavior of rubber are observed according to the shape of tread on the mold surface. It was verified that the shape of tread gives significant effect on the flow behavior of rubber. Different flow behaviors of rubber and sequential contact of rubber to the mold surface were observed according to the shape of tread on the mold surface. Therefore, we have identified that the shape of tread give a change in the flow behavior of rubber.

자동차 타이어의 트레드는 노면과 직접적으로 접촉하며 제동력, 구동력, 소음 등 중요한 역할을 한다. 트레드는 많은 그루브로 이루어져 있는데 고무의 형상을 형성하는 가류 공정에서 불량이 발생하게 되면 트레드의 기능이 저하되어 자동차 성능의 문제로 이어지게 된다. 본 논문은 CAE 해석을 통하여 가류 공정 중 구체적인 고무의 흐름을 분석하였다. 트레드 형상에 따라 고무 흐름의 편차가 발생하기 때문에 형상에 따른 트레드의 고무가 금형에 접촉되는 순서와 속도 그리고 고무의 흐름을 관찰하였다. 트레드의 형상에 따라서 고무가 금형에 안착되는 양상이 다르게 나타났으며 고무의 흐름에 큰 변화를 주는 것을 확인할 수 있었다.

Keywords

References

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