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A Study on the PMMA Lens Fabrication for Surgical Light Based on Injection Molding Convergence Process

사출성형 융합공정 기반 수술실 무영등용 PMMA 렌즈 제작에 관한 연구

  • Kang, Bo-An (Department of Biomedical Engineering, Nambu University) ;
  • Oh, Hyeong-Jong (Department of Biomedical Engineering, Nambu University) ;
  • Jeong, Byeong-Ho (Department of Biomedical Engineering, Nambu University) ;
  • Jeong, Nam-In (Division of Research & Development, GNST Inc.)
  • Received : 2014.12.07
  • Accepted : 2015.02.20
  • Published : 2015.02.28

Abstract

We studied on the injection molding conditions of defect-free PMMA lens for surgical light. When the heat temperature of mold is low, more imperfect molding or weldlines and flow marks have showed. A defective lens depends on low fluidity of the PMMA resin and its temperature is high, a flexural strain has occurred. The longer cooling time of specimens, the more cracks have occurred due to resin crystallization. In this study, optimal molding conditions for defect-free PMMA lens is as follows. The heat temperature of core mold was 110 [$^{\circ}C$] and also the cooling time was 25 [sec]. PMMA materials can realized low expense to produce plastic optical lens and applications.

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