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최태균 ( T G Choi ),이희주 ( H J Lee ),류민영 ( M Y Lyu ) 한국고무학회 2014 엘라스토머 및 콤포지트 Vol.49 No.4
건축용 접착제로 활용되고 있는 부틸고무는 주로 시트의 형태로 사용된다. 본 연구에서는 컴퓨터 해석을 통해부틸고무 시트 압출용 다이를 설계하였다. 압출용 다이의 내부는 크게 매니폴드와 랜드로 나뉜다. 매니폴드는 다이중앙에서 유입되는 재료가 폭 방향으로 흐름이 이루어 지도록 하는 역할을 한다. 랜드는 재료가 흐름 방향으로 균일하게 흐르게 하여 균일한 두께의 시트가 성형되도록 한다. 다이는 매니폴드와 랜드 외에도 아일랜드를 설치하여 흐름의안정을 주도록 하는 경우가 많다. 본 연구에서는 컴퓨터 해석을 통하여 다이에서 매니폴드의 각도와 길이, 랜드 길이그리고 아일랜드를 설계 변수로 하여 다이 출구에서 다이 폭 방향으로 균일한 흐름이 형성되도록 하는 최적의 다이형상을 연구하였다. Butyl rubber is used as an adhesive and it is mainly used in the form of sheets. The goal of this study is to design an extrusion die for the butyl rubber sheets using computer simulation. The extrusion die for the butylrubbersheets consists of manifold area and land area. In the manifold area, flows are spread from the entrance of the extrusion die to the land area. In the land area, flows become stable to the flow direction and uniform sheet can be obtained. Island area is being installed in the land area to get uniform flow. Four parameters, angle of manifold, length of manifold, length of land and island, were examined in the computer simulation. The optimum geometry of the extrusion die is derived which has a uniform flow in the width direction of the die.
공동주택 급수급탕 이중배관의 직렬이음 최적화 모델 개발
최태균(Tae Kyun Choi),박천익(Cheon Ik Park),현규섭(Kyo Seup Hyun),이도경(Do Kyeng Lee),정웅성(Ung Sung Jeong) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This study aimed to draw designs and check review construction methods to apply actual apartment house, based on the flow rate measurement and CFD simulation results performed in the preceding study. These designs of the system were divided into individual and district heating system and considered to prevent flow rate concentration, and a narrow space of the Pipe shaft. The system model(Direct joint of dual piping) has been optimised, We check the construction methods in the structure of installed piping and box, freeze protection. This system will be built in an apartment house in the near future.
Research Trends in Polymer Materials for Use in Lightweight Vehicles
류민영,최태균 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
Weight reduction of vehicle is very important because vehicle weight directly affects energy consumption. Studies researchinglightweight vehicle manufacturing process that use polymers are reviewed in this paper. Approaches reducing the weights of vehiclesusing polymers most frequently involve replacing ferrous and non-ferrous metals with polymers and increasing the specific strengthsand rigidities of polymers. Researches into polymers for use in lightweight vehicle are classified into high performance polymers,polymers for weight reduction, reinforced polymer composites, polymer sandwich panels, and polymer/metal hybrid systems. A diverserange of polymer materials can be used to make vehicle components and the manufacturing methods required to produce and workthose materials vary greatly. Shaping processes must be chosen according to the materials being used and the product design. Replacement of metal products with polymer materials in current vehicles is limited. Large amounts of lightweight materials, suchas polymers, will be greatly used to construct newly developed vehicles, including electric and electric/hybrid vehicles.