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조규갑,제덕근,임주택 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.1
This paper deals with the development of driven gear sleeve speed meter in automobile by using injection mold. In general, aluminized driven gear sleeve is manufactured by die casting and then machining processes. In order to achieve light weight of automobile and also to reduce the necessary manufacturing processes, injection mold using plastic materials is desirable. This paper describes there design of driven gear sleeve using plastics, the selection of plastic material to be used, mold design and manufacturing, an d standardization of inject ion condition s. An actual mold is designed and driven gear sleeve is manufactured by inject ion mold. The speed meter driven gear sleeve by injection mold u sing plastic material is more useful compared with the existing met el parts. By using injection mold for manufacturing speed meter driven gear sleeve developed in this paper, the weight of automobile is reduced and number of manufacturing processes is decreased and material cost is decreased.
원통형 플라스틱 성형품의 싱크 마크를 최소화하기 위한 사출성형 조건의 최적화
권윤숙,제덕근,정영득,Kwon, Yun-Suk,Je, Duck-Keun,Jeong, Young-Deug 한국금형공학회 2008 한국금형공학회지 Vol.2 No.2
This paper describes the optimization of injection molding conditions to minimize sink marks. Sink marks, which refer to a small depression on the surface opposite a thick wall thickness, are often encounted in injection molded plastic parts. Part geometry, material properties and processing conditions during injection molding can affect the sink mark depth. We designed the runner system which is possible balanced filling to cavities using CAE program and then obtained optimal processing conditions by Taguchi's Robust Design technique. By actual injection molding using optimized mold and molding conditions, it confirmed that sink mark depth decreased zero compared to 1mm level in the conventional mold and process.
권윤숙,제덕근,정영득,Kwon, Youn Suk,Je, Deok Keun,Jeong, Yeong Deug 한국금형공학회 2014 한국금형공학회지 Vol.8 No.1
As a rotating machine element, plastic gears are more and more widely used in such as industrial machine element, since plastic gear is lighter, higher wear-resistance, and higher vibration absorbing ability than metal gears. When operating plastic parts, tooth breakage and fatigue life shortened due to increasing number of applying load and tooth flank temperature rising, such that accuracy of plastic gears is divided from allowable range to cause vibration and noise. On this study, a internal plastic gears are developed which improved the filling balance molding process by a new injection mold structure. The new mold structure called HR3P(hot runner type 3plate mold). As the result from this studies, we obtained a very accurate roundness internal gears by using design of experiment.
내측 기어 성형용 핫러너 금형에서의 충전불균형에 관한 연구
노병수,제덕근,정영득,No, Byung-Soo,Jea, Duck-Gun,Jeong, Yeong-Deug 한국금형공학회 2008 한국금형공학회지 Vol.2 No.3
Plastic parts are molded for the purpose of mass production in injection molding. Therefore designer is usually designing molds that has geometrically balanced hot runner lay-out for filling balance at cavities. Although, mold is manufactured with geometrically balanced runner lay-out, there are actually filling imbalances in cavities. These filling imbalances phenomenon are caused by complicated interaction between melt and mold. In this paper, filling imbalances for internal gear based on injection molding in hot-runner mold were investigated by CAE and injection molding experiences.
노건철,장민규,제덕근,최윤식,정영득,Noh, Keon-Cheol,Jang, Min-Kyu,Je, Deok-Keun,Choi, Yoon-Sik,Jeong, Yeong-Deuk 한국금형공학회 2014 한국금형공학회지 Vol.8 No.1
Plastic products are producted more than 70% of total processes by the injection molding. The injection molding process has 4 processes such as filling, packing, cooling and ejecting. It spends most of times in the cooling process. Therefore, it is important to control the mold temperature in producing plastic products. The time and system of cooling affect the product's quality and productivity. Especially, cooling time has about 60% of total injection cycle time. Therefore, we can improve a productivity by shortening cooling time. This study shows comparative study about cooling efficiency of spiral channel and baffle and observed the variation of time to freeze of molding As the result of CAE experiments, cooling rate by spiral channel had faster than baffle and as freeze time was decreased. Results of this study will be used widely to design for cooling system of injection mold.