http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
사출금형의 냉각효율 향상을 위한 스파이럴 냉각시스템 개발
이희진(H. J. Lee),류호연(H. Y. Ryu),이희철(H. C. Lee),김경호(K. H. Kim),황재영(J. Y. Hwang),김영식(Y. S. Kim) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Recently the mold industry needs to respond quickly to the customer needs and various demands, therefore many manufactures make quality products with cheaper price and shorter delivery. The injection molds for mass production of complex plastic products are very difficult due to several factors, such as uniform cooling, filling balance, thermal control and etc. In this paper, we propose uniform cooling method by using the spiral cooling system instead of baffle cooling. In other words, this paper proposes a method to increase the efficiency of cooling required in the injection mold. Therefore, this spiral cooling system can decrease cooling time in the injection molding process and we can improve productivity by using this system.
넓은 주파수 범위에서의 실린더형 유체 댐퍼에 대한 실험적 동특성 규명 연구
문석준(Moon, S.J.),김흥섭(Kim, H.S.),정태영(Chung, T.Y.),이동환(Lee, D.H.),황재영(Hwang, J.Y.) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.6
System identification for cylindrical oil dampers is carried out based on a series of dynamic experimental tests and theoretical approach for the analysis of the experimental data. Experimental tests are conducted using a specific hydraulic actuator in the wide frequency range from 10 Hz to 90 Hz. From this study, it is confirmed that control force of the damper is composed of inertia, damping and restoring components. In general, both restoring and damping components are significant and comparable. However, the portion of the inertia components becomes more significant than to be negligible in the high frequency range.
이희철(H. C. Lee),류호연(H. Y. Ryu),이희진(H. J. Lee),김경호(K. H. Kim),황재영(J. Y. Hwang),김영식(Y. S. Kim) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
In general injection molding used a inclined core for the undercut processing. However, the injection mold with the inclined core has a structure complex and large. The injection mold requires an injection molding machine of higher specification. In addition, the injection molding machine should be used dedicated when the molding simultaneously different products. Thus, it can be applied in the limited space through the improvement of the inclined core for the weight reduction of the mold, it is desired to develop the tension core of the long life.