A study on the Molding Stability of Hydro-mechanical High Speed Injection Molding for Thin-Walled(0.3mm) LGP

초박형(0.3t) 도광판 적용을 위한 유압식 고속사출성형의 성형 안정성 연구

  • Kim, J.S. ;
  • Oh, J.G. ;
  • Jeong, C. ;
  • An, H.J. ;
  • Hwang, C.J. ;
  • Kim, J.D. ;
  • Yoon, K.H.
  • 김종선 (한국생산기술연구원 정밀금형팀) ;
  • 오정길 (한국생산기술연구원 정밀금형팀) ;
  • 정철 (한국생산기술연구원 정밀금형팀) ;
  • 안희정 ((주)선우중공업 부설연구소) ;
  • 황철진 (한국생산기술연구원 정밀금형팀) ;
  • 김종덕 (한국생산기술연구원 정밀금형팀) ;
  • 윤경환 (단국대학교 기계공학과)
  • Published : 2008.10.09

Abstract

Recently, electronic products and related parts are required to have thin thickness because of small form factor. To go with the trend, LGP(light guide plate) of LCD BLU(Liquid Crystal Display Back light unit: It is one of kernel parts of LCD) for cell phone has the thickness of 0.3 mm and the battery case of cell phone has 0.25 mm. Accordingly, high speed injection molding is required to make products which have thin thickness. High speed injection molding means that the resin is injected into the cavity at higher than normal speed avoiding short shot. In the case of hydro-mechanical high speed injection machine, it requires the design for hydraulic unit to make high injection speed and the design for control unit to control hydraulic unit. In the present paper, we concentrated on the molding stability of hydro-mechanical high speed injection machine to make an LGP of 0.3 mm thickness.