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황철진(C. J. Hwang),김종선(J. S. Kim),정철(C. Jeong),안희정(H.-J. An),허영무(Y. M. Heo),허영무(Y. M. Heo),김종덕(J. D. Kim),윤경환(K. H. Yoon) 한국소성·가공학회 2008 소성가공 : 한국소성가공학회지 Vol.17 No.8
Because of steep rise of international energy cost in recent years, high efficiency has been emphasized in energy policy. As far as injection molding machine is concerned, hybrid method using hydraulic and electric systems became the key to this energy saving. The energy saving and molding reproducibility of hybrid injection molding process were shown experimentally. The power consumption of hybrid injection molding machine is reduced to 38% as compared with that of hydraulic machine. Furthermore, the molding reproducibility was shown for both methods.
박판(0.3mm) 도광판 성형을 위한 유압식 고속사출성형의 성형 안정성 연구
황철진(C. J. Hwang),김종선(J. S. Kim),오정길(J. G. Oh),정철(C. Jeong),안희정(H.-J. An),허영무(Y. M. Heo),김종덕(J. D. Kim),윤경환(K. H. Yoon) 한국소성·가공학회 2008 소성가공 : 한국소성가공학회지 Vol.17 No.8
Recently, products of electronic industry and related parts are required to have the thickness thinner and thinner to reduce the part weight. To go with this 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 ~0.3mm and the battery case of cell phone has ~0.25mm. Accordingly, high speed injection molding is required to mold products which have thinner parts. To achieve high speed injection and proper control of hydraulic unit, various design was applied to conventional injection unit. In the present paper, we concentrated on the molding stability of hydro-mechanical high speed injection machine to make an LGP of 0.3mm thickness.