Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
권호 표지

Manufacturing of Rapid Tooling for Thick-Wall Plastic Lens Mold with Conformal Cooling Channel

균일 냉각을 고려한 Thick-Wall 형상의 플라스틱 렌즈 쾌속 금형 제작

  • Park, Hyung-Pil (Precision Dies & Mold, Korea Institute of Industrial Technology) ;
  • Cha, Baeg-soon (Precision Dies & Mold, Korea Institute of Industrial Technology) ;
  • Lee, Sang-Yong (Precision Dies & Mold, Korea Institute of Industrial Technology) ;
  • Choi, Jae-Hyuk (Department of Mechanical Engineering, Ajou University) ;
  • Lee, Byung-Ok (Department of Mechanical Engineering, Ajou University)
  • 박형필 (한국생산기술연구원 정밀금형) ;
  • 차백순 (한국생산기술연구원 정밀금형) ;
  • 이상용 (한국생산기술연구원 정밀금형) ;
  • 최재혁 (아주대학교 기계공학과) ;
  • 이병옥 (아주대학교 기계공학과)
  • Received : 2007.06.18
  • Accepted : 2007.10.31
  • Published : 2007.12.01
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Abstract

In the optical application demand for high quality lens is increasing. Plastics lenses are demanded more than glass lenses for large size lenses as well as micro-size lenses. It is difficult to apply typical straight cooling channels of injection mold to lens molding due to its non-uniform temperature distribution. In this study, we manufactured molds for plastic lenses with the conventional cooling channels and conformal cooling channels produced by the DMLS process. We evaluated cooling performance for the 2 molds by injection molding experiment. Also, uniformity of the temperature distribution was tested by infrared camera and temperature monitoring. We confirmed that the cooling performance and temperature uniformity with the conformal cooling channels is much improved from the ones with the conventional. The cooling time with the conformal cooling channels was reduced 30% compared with the conventional cooling channels.

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