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이중사출의 접합성 개선 및 생산성향상을 위한 금형구조 개발기술연구
김옥래,이상용,김영근,우창기,한일용,Kim, O.R.,Lee, S.Y.,Kim, Y.K.,Woo, C.K.,Han, I.Y. 한국금형공학회 2008 한국금형공학회지 Vol.2 No.6
Double-injection molding can inject two different materials or two colors in the same mold and process. If this injection process use, product has ability because the base part maintain strength and specified part can inject soft-material. It makes the cost down by single operation automatically for saving wages. In this paper, we designed double-injection mold for automobile remote control to inject secondary using this part as insert after inject external appearance of product. CAE analysis was progressed gate location and runner size as variable and analysis result is reflected in mold design process. As a result, it could solved badness that is generated at the conventional mold. Additionally, cost is downed by reducing loss of runner as well as could omit painting process because surface of finished product is improved through new mold.
Bi2212/Ag 선재의 초전도 특성에 대한 열처리의 영향
김상철,하동우,송규정,오상수,이남진,한일용,오재근,손호상,Kim, S.C.,Ha, D.W.,Song, K.J.,Oh, S.S.,Lee, N.J.,Han, I.Y.,Oh, J.G.,Sohn, H.S. 한국초전도학회 2006 Progress in superconductivity Vol.8 No.1
We have fabricated double stacked 385 filamentary Bi2212/Ag round wires which have different Ag ratios. The wires have been heat-treated at the maximum temperature($T_{max}$) of $882{\sim}896^{\circ}C$ for 0.5 h. Effect of heat treatment on critical current density and critical temperature on Bi2212/Ag round wires has been studied. Critical current density of the wire heat -treated at $890^{\circ}C$ showed 206,250 $A/cm^2$ at 4.2 K, 0 T and critical temperature of the wire was 83 K. Microstructure of the wires also has been studied via optical microscopy and SEM.