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나뭇가지형 러너시스템을 갖는 사출금형에서의 충전 불균형
한동엽,정영득,Han, Dong-Yeop,Jeong, Yeong-Deug 한국금형공학회 2007 한국금형공학회지 Vol.1 No.1
Recently, the study for filling imbalance in thermoplastic polymer has gradually been increased. However, it is hard to find the researches for filling imbalance of thermoplastic elastomer(TPE). The experiment of filling imbalance was conducted for thermoplastic vulcanize(TPV) and PP, ABS polymers in the mold with un-geometrically balanced runner system(Branch Type Runner System). In this experiment, the effects of the melt temperature, injection pressure and injection speed on the filling imbalance were investigated.
한동엽,정영득,Han, Dong-Yeop,Jeong, Yeong-Deug 한국금형공학회 2012 한국금형공학회지 Vol.6 No.1
Aspect of filling imbalance that is originated from imbalanced share rate in runner is changed by material property, runner layout that are factors of changing viscosity and by injection pressure, injection speed, melt temperature and mold temperature that are injection conditions. In this paper, we made a study of runner system that is one of factor of filling imbalance and Sharp Conner Effect and Groove Corner Effect that are recently released. The study are showed that filling rate of between inside and outside cavity was influenced on shape of runner. Also, we suggested runner system for filling imbalance by adapting the two effects at multi cavity of unary branch type and theoretical investigated flow in the Shrap Conner runner type.
편측 분기형 러너시스템을 가진 사출금형에서 엘라스토머 TPV의 충전 불균형
한동엽,박태원,정영득,Han, Yeop-Dong,Park, Tae-Won,Jeong, Yeong-Deug 한국금형공학회 2008 한국금형공학회지 Vol.2 No.4
Recently, the study for filling imbalance in thermoplastic polymer has gradually been increased. However, it is hard to find the researches for filling imbalance of thermoplastic elastomer(TPE). The experiment of filling imbalance was conducted for the three kinds of thermoplastic vulcanizes(TPVs) and PP polymer in the mold with geometrically balanced runner system(Unary Branch Type Runner System). In this experiment, the effects of the melt temperature, injection pressure and injection speed on the filling imbalance were investigated. There was also the imbalance in TPV injection molding process as well as in conventional injection molding with plastics. The tendency of filling imbalance in TPV injection molding specially decreased by taking place the hesitation of TPV melt.
다수캐비티 사출금형에서 충전 불균형이 성형 품질에 미치는 영향
한동엽,정영득,Han, Dong-Yeop,Jeong, Yeong-Deug 한국금형공학회 2013 한국금형공학회지 Vol.7 No.1
The injection molding process is a predominant method for producing plastic parts. In order to maximize productivity and molding quality in a injection mold, it is important that each cavity in a multi-cavity injection mold is identical. This requires that cavity dimensions should be identical and delivery system of melt to each cavity have to be the same. Despite the geometrically balanced layout in multi-cavity injection mold more than 4 cavities, it has been observed that the filling in each cavity results in imbalances. Most of cases, this phenomenon of filling imbalances have a bad effect on dimension accuracy, warpage, molding appearance and strength of molding parts. In this study, experiment were conducted to investigate the effect of filling imbalances on the molding quality(surface gloss, shrinkage, tensile strength) in the multy-cavity injection mold.
디지털 시대의 기술 융합 기반의 스마트 가구 연구 - AIoT 기술을 중심으로 -
한동엽(Dong Yeop Han),이정교(Jung Gyo Lee) 한국가구학회 2024 한국가구학회지 Vol.35 No.1
Currently, smart furniture is changing its existing concepts and properties as it combines AIs super intelligence and robots automatic control technology based on connectivity of IoT. In particular, it is evolving into a futuristic smart furniture that autonomously provides various information and services, blurring the boundaries between residential spaces and home appliances. Therefore, the researcher would like to analyze how the traditional concept of furniture is changing through convergence with digital technology. As a research method, the researcher redefined the overall concept of IoT based on various academic papers and literature, and also look at AI and robots that are closely related to the development of IoT. Next, the researcher establish the concept and role of technology converged smart furniture and derive five characteristics. Based in this, an analysis model is created and appropriate cases are analyzed. The scope of case study is from 21<SUP>st</SUP> century to the present. Through this, the researcher typifies the direction of furniture design in the digital age and suggest the possibility of rational and efficient design to furniture designers in the near future.
한동엽(Han Dong-Yeop),배상찬(Bae Sang-Chan),형원길(Hyung Won-Gil) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
This research was done to produce non-sintered mortar with Industry By-product Ground Granulated Blast Furnace Slag treated(GBFS) with Phospho-gypsum(PG) as a stimulant, and to find the property of hardening body. The research result showed that both Flexural Strength and Compressive Strength had superior strength improvement to regular cement mortar, and both Flexural Strength and Compressive Strength shows the best performance when Phospho-gypsum was at 15%. Chloride Ion Penetration and Chemical Resistance both showed highly improved performance compared to regular cement mortar, and in case of chloride ion, it showed best performance when Phospho-gypsum was at 7%, and 15% for Chemical Resistance.
한동엽(Han Dong-Yeop),이현수(Lee Hyun-Soo),박문서(Park Moon-Seo),조영실(Jo Young-Sil) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Recently, according to the applying of sale after building system, it is forecasted that a lot of changes in housing construction. Especially, since it is expected that the change of the system makes a great different conditions in the construction supervision system which is necessary to keep the quality of housing construction, the needs of improving strategies for construction supervision system to adapt the changed system are requested. To achieve this purpose, we selected one of the most affectable factor which could be affected by change of system among the 4 factors of construction supervision system: the assignment of supervisor, the arrangement of supervisor, the business of supervisor, and the standard of supervision cost. In this article, we suggested improving strategies to solve problems of existed system and to adapt change of system using the SWOT analysis.