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김학빈(Kim Hak Bin),현창훈(Hyun Chang Hoon),차성운(Cha Sung Woon) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The microcellular foaming process was developed in the early 1980s to solve industrial problem and proved to be quite successful. Microcellular foaming process uses inert gases such as CO2, N2. As these gases solve into polymer matrices, many properties are changed. In previous research, many facts of microcellular foaming process are founded its characteristics. Previous researcher found the characteristics of microcellular foaming process with general gas, for example CO2, N2 and so on. So, in this paper, discuss on the characteristics of microcellular foaming process with helium gas.
현창훈(Chang Hoon Hyun),차성운(Sung W Cha),윤재동(Jea Dong Yoon) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Micro-cellular foamed plastics formed by injection molding create a sensation in polymer industrial use for their following characteristics: lighter weight, less warp, reduced cycle time, less sink marking, and so on. This is due to the fact that the cells are nucleated in the Polymer matrix during the injection. Although foamed plastics produced by an injection molder have many merits as listed above, the MCPs are not destroyed completely in hole plastic industry and offer some problems. There are few studies designed to make recommendations for the solution of the MCPs products surface quality. This research is surface problem improvement research of MCPs product that use polymer film.
현창훈(Chang Hoon Hyun),차성운(Sung Woon Cha),이경수(Kyung Soo Lee),김승영(Yong Seung Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The injection molding process of MCPs is optimum process condition that comes from trial and error experiment. CAE analysis, which is applied to MCPs process in side of cost and time, is proper research method. This research is that ultra minuteness promulgation is tried to apply to automobile part through fill pattern and cell morphology, which is compared CAE analysis process with real MCPs foaming process. This result can confirm a good possibility for the application of MCPs CAE analysis to real MCPs foaming process and find some problems.
에너지 회생 기법을 사용한 초고속 전동 사출성형기 개발
유현재,유성철,현창훈,박경호,Yu, Hyeon-Jae,Yoo, Sung-Chul,Hyun, Chang-Hoon,Park, Kyoung-Ho 한국금형공학회 2016 한국금형공학회지 Vol.10 No.2
High-speed and high-torque performance is required in the ultra-high speed electric injection molding machine field. To implement this performance, the big-size inverter is needed and the corresponding converter should be used. In this case, the whole cost for configuring the system will be increased. In this paper, we introduce a method which is able to reduce the energy and the cost for configuring the system using the energy regeneration. The energy regeneration method is based on reusing the regeneration power generated at the electric motor during decelerating the injection motion. In this paper, we demonstrate the effectiveness of the method by using the ultra-high speed injection motion.