Original Article
  • The Method for Strengthening of Interfacial Adhesion of Overmolded Materials via Injection-Compression Molding

  • Donguk Kim*, Yoon-Bo Shim*, Young-Bin Park*†

  • * Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)

  • 사출압축 공정을 활용한 오버몰딩 소재간 계면 접합력 강화

  • 김동욱* · 심윤보* · 박영빈*†

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Overmolding is the process that injects the polymer onto the insert to make the joining of polymer and insert rapidly. One important feature in overmolding is interfacial adhesion between the polymer and insert. This paper utilized injection-compression molding to improve the interfacial adhesion property. This paper manufactured overmolded specimen using injection molding and injection-compression molding for comparison. The interfacial adhesion was characterized by optical microscopy and mode 1 fracture toughness.


오버몰딩 공정은 미리 제작된 물질 위에 고분자를 사출하여 이종 소재의 접합을 빠르게 진행할 수 있는 공정이다. 두 소재를 접합하는 공정의 특성상, 계면 결합력이 중요한 요소로 작용하며, 본 연구에서는 두 소재의 높은 결합력을 위해 사출압축 공정을 활용하였다. 결합 강화 정도를 비교하기 위해 사출 공정과 사출압축 공정을 활용한 오버몰딩 시편을 각각 제작하였으며, 광학 현미경과 mode 1 파괴인성을 통해 두 소재의 결합 정도를 비교하였다.


Keywords: 오버몰딩(Overmolding), 사출압축 성형(Injection-compression molding), 열가소성 복합재료(Thermoplastic composite)

This Article

Correspondence to

  • Young-Bin Park

  • Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)

  • E-mail: ypark@unist.ac.kr