Among the Additive Manufacturing (AM) technologies, the Binder-Jetting printing technology is a method of spraying an adhesive on the surface of powder and laminate layer by layer. Recently, this technique has become a major issue in the production of large casting products such as ship-building, custom vehicles and so on. In this study, we performed research to make actual mold castings and increase mechanical property by using special sand and water-based binders. For use as a mold, it has a strength of more than 3MPa and permeability. Various experiments were carried out to obtain suitable them. The major process parameters were binder jetting volume, binder types, layer thickness and heat treatment condition. As a result of this study, the binder drop quantity was measured to be about 60 pico-liter, layer thickness was 100μm and the heat treatment condition was measured about 1,000℃ and compressive strength were measured to be more than 5MPa. The optimum condition of this experiment was established through actual casting of aluminum. The equipment used in this study was a Freeforms T400 model (SFS Co., Ltd.), and the printing area of 420 * 300 * 250mm and resolution of 600dpi can be realized.

This conceptual essay introduces disciplined vision casting (DVC) as a new method for exploring possible futures. Drawing on scenario planning, introspection, and creative writing, DVC casts a set of future scenarios, based on a combination of guiding uncertainties found in the literature. Marketing scholars stand to benefit from leveraging DVC as it provides them with a laboratory for exploring undiscovered contexts and circumstances which may challenge widely-held beliefs. As such, this novel method of projecting into the future offers the field a stimulus for theory discovery and enrichment and a low-cost and readily-implementable method of foreseeing potential future events.

본 연구는 양이온 불균질막을 제조하기 위해 PVDF matrix에 상용 양이온교환수지와 sulfonated poly(phenylene oxide)(SPPO)를 배합하여 제조, 이온 흡착 특성에 관하여 연구하였다. 연구결과 PVDF-IER 불균질막과 PVDF-SPPO 불균질 막 PVDF-SPPO-IER과 비교하였을 때 고분자 매트릭스의 비율이 30% 이하일 경우 이온교환용량, 전기저항에서 우수한 물성 을 가지고 있는 것을 확인할 수 있었다. 인장강도의 경우 PVDF resin의 약한 내구성에도 불구하고 상용화 불균질막과 비교하 여 최대 5배 이상의 강인한 모습을 보이고 있는 것으로 확인할 수 있었다. 따라서 화학적 특성과 기계적 특성을 고려했을 때 PVDF와 이온교환분말과 SPPO의 혼합 최적 비율은 30 : 70이며 이때의 전기저항은 3~5 Ω⋅cm2, 이온교환 용량은 0.6~1.0 meq/g으로 측정되었고 기계적 강도는 12~15 kgf/cm2으로 측정되었다.

This research developed ultra-pressure pump main body by using ductile cast iron FCD500, conducted quantitative analysis on following phenomenon of flow or solidification processing in cast processing for improvement of cast device, after extracting model from cast concluded as follows by brinel hardness test. after selecting the ideal condition of cast and it applied to cast of real product shape, discovered the ideal filling processing under the condition that temperature of molten metal was between 1300℃ and 1280℃. and after finishing filling, solidification was commenced rapidly when percentage of solidification completion was between 40%~50%, at that moment, the termperature was measured 1100℃. moreover under the condition of temperature below 900℃, keeping temperature on the center of parts for a certain period of time brings stability of stabilization of heat in parts and organizational stabilization of ductile cast iron. As the results of the casting method design, it was that the ductile cast parts of pump main body was obtained as the maximum HB of 220 was recorded and good test results were achieved

Today many successful star marketing cases constantly represented in many companies, so star marketing has become significant. Although star marketing brings a lot of business opportunities for companies, the results are not always positive effects. The purpose of this study is to provide a mechanism to select an advertising model casting for star marketing. This study uses the combined customer data analysis and AHP approach to choose a adequate an advertising model such as internet search engine, news searched words, customer survey, etc. And then AHP technique is applied to the five chosen candidates based on their salary, awareness, issues, continuous possibility and connection to product's concept. As a result, the proposed method will guide a good casting method to select an suitable advertising model and improve the effects of star marketing. how it improves the effect of star marketing.

Today many successful star marketing cases constantly represented in many companies, so star marketing has become significant. Although star marketing brings a lot of business opportunities for companies, the results are not always positive effects. The purpose of this study is to provide a mechanism to select an advertising model casting for star marketing. This study uses the combined customer data analysis and AHP approach to choose a adequate an advertising model such as internet search engine, news searched words, customer survey, etc. And then AHP technique is applied to the five chosen candidates based on their salary, awareness, issues, continuous possibility and connection to product's concept. As a result, the proposed method will guide a good casting method to select an suitable advertising model and improve the effects of star marketing. how it improves the effect of star marketing.

사용후핵연료 파이로프로세싱 공정 생성물인 우라늄 전착물을 잉곳 형태로 주조하는 공정이 있다. 이 논 문에서는 실험실 규모의 우라늄 전착물 잉곳 주조 장치에 대한 설계 개념을 소개하고, 이에 따라 제작된 장 치의 성능 시험 결과 및 우라늄을 사용한 잉곳 주조 시험 결과를 소개한다. 이 장치는 도가니를 경동시켜 우라늄 용탕을 주형에 주입하여 우라늄 잉곳을 제조하며, 우라늄 전착물을 연속으로 주입할 수 있는 컵 형태의 원료 장입장치를 장착하였다. 이러한 장치를 사용하면 우라늄 전착물의 잉곳 생산성을 높일 수 있다. 실험 결과 우라늄 원료를 장입하여 주조한 결과 수축공이 적은 양호한 주물을 제조하는데 성공하였으며, 이러한 실험실 규모의 장치를 개발한 경험을 활용하여 공학규모의 장치를 설계하 는데 활용하였다.

MCFC 작동온도인 650˚C에서 음극의 creep과 소결에 의한 구조적 변형을 막기 위해 기계적 합금법에 의한 Ni-WC분말을 합금화하여 변형에 대한 저항성을 증대시키고자 하였다. 80시간동안 어트리션 밀링을 실시한 분말은 XRD 분석결과 결정규칙이 파괴된 비정질 상을 보였다. 제조된 분말은 적당한 점도의 슬러리로 제조후 테이프 캐스팅법에 의해 green sheet를 제조하였다. 제조된 박판의 두께는 0.9mm였고, 평균 기공 크기는 3~5μm, 기공율은 55%였다. 소결체의 XRD 분석결과 2차성은 생성되지 않았으며, SEM 및 dot-Mapping image를 통해 Ni matrix 안에 W 입자가 미세하고 균일하게 분포되어 있어 고용강화 및 분산강화를 통해 Ni 음극의 기계적 특성을 향상시킬 것으로 기대된다.

본 연구는 수면전개법으로 고분자 박막을 제조하기 위한 연구로서 PVC 및 CA의 고분자용액의 수면전개 거동과 생성된 박막의 구조특성을 검토하였다. 고분자용액의 수면전개성은 고분자용액의 용매선정에 따른 표면장력, 점도의 변화와 고분자의 농도변화에 따라 영향을 받았다. 또한 수면온도가 증가함에 따라 전개성은 저하되었다. 수면전개 박막의 구조는 고분자농도가 증가할수록 치밀하여 졌으며, 막의 응집상태는 공기면측과 수면측이 다르게 나타나 공기면측의 상태가 다소 치밀하였다. 또한 수면의 온도가 증가할수록 막의 구조는 더 치밀함을 보였다. 한편 3 wt.%의 CA용액으로부터 0.1μ의 두께를 갖는 박막을 얻었다.