• 에너지공학
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• 제29권3호
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• pp.50-56
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• 2020

Currently, 3D printing technology is a new revolutionary additive manufacturing process that can be used for making three dimensional solid objects from digital films. In 2019, this 3D printing technology spreading vigorously in production parts (57%), bridge production (39%), tooling, fixtures, jigs (37%), repair, and maintenance (38%). The applications of 3D printing are expanding to the defense, aerospace, medical field, and automobile industry. The raw materials are playing a key role in 3D printing. Various additive materials such as plastics, polymers, resins, steel, and metals are used for 3D printing to create a variety of designs. The main advantage of the green cement for 3D printing is to enhance the mechanical properties, and durability to meet the high-quality material using in construction. There are several advantages with 3D printing is a limited waste generation, eco-friendly process, economy, 20 times faster, and less time-consuming. This research article reveals that the role of green cement as an additive material for 3D printing.

• 한국의상디자인학회지
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• 제19권3호
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• pp.33-47
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• 2017

The purpose of this study is to provide fundamental data for the development of new course on 3D printing in the fashion design department. In order to investigate the perception of and educational needs in 3D printing, the data were collected from 266 students (female 68.8%, male 31.2%) majoring in fashion design aged 18-25 living in the capital area. The results of this survey showed that when investigating perceptions of 3D printing, it was found that 68.8% of answerers had indeed heard of 3D printing. Regarding the path they came to know about 3D printing, mass media such TV was the most frequent answer (54.6%). On the other hand, to the question asking about their intention to take the subject if given, approximately 71% said "Yes". Also, if a modeling class were given, the division that they wanted to explore most in the fashion industry was fashion jewelry. Finally, to the question asking interest in starting a business, 71.1% answered that they had interest. Out of those that answered that they had interest, when questioned about in which field they wanted to start a business, the most frequent answer was fashion online shopping mall. Finally, NCS-based 3D printing courses were suggested in the Fashion Design area. As 3D printing techniques are actively applied to the fashion industry overseas, creative education is needed through the integration of fashion and 3D printing technology by introducing 3D printing related programs in colleges.

• 한국산학기술학회논문지
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• 제17권10호
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• pp.34-38
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• 2016

본 연구는 3D프린팅 산업에서 3D프린팅 운용과 개발에 사용되어지는 전문기술인력을 효과적으로 양성할 수 있는 3D프린팅전문운용사와 3D프린터개발산업기사의 국가기술 자격종목을 개발하고자 하는데 그 목적이 있다. 연구의 목적을 달성하기 위하여 3D프린팅 분야의 국내외 실태 조사, 문헌조사를 통하여 3D프린팅 관련 교육훈련기관 및 검정 수요 예상인력을 파악했으며, 유사자격제도를 분석하였고, 직무분석을 통하여 3D프린팅전문운용사와 3D프린터개발산업기사의 직무 및 교육내용을 분석하였다. 3D프린팅전문운용사의 필기시험은 3D 스캐너, 3D 모델링, 3D프린터 설정, 3D프린터 출력 및 후가공, 3D프린터 교정 및 유지보수 5개 과목과 실기시험의 경우, 3D프린터 작품제작, 3D 모델링, 3D 스캐너, 3D프린터 유지보수 실무 등을 내용으로 검정 방법으로는 작업형이다. 3D프린터개발산업기사의 필기시험은 3D프린터 회로 및 기구, 3D프린터 장치, 3D프린터 프로그램, 3D프린터 교정 및 유지보수 등 4개 과목과 실기시험의 경우, 3D프린터 조립 및 출력점검, CAD 작업, 3D프린터 프로그램, 3D프린터 유지보수 실무 등을 내용으로 검정방법으로는 작업형이다. 또한, 3D프린팅전문운용사와 3D프린터개발산업기사 자격종목 신설에 대한 설문조사를 실시했으며, 3D프린팅전문운용사와 3D프린터개발산업기사 자격종목의 출제기준 및 채점 방법을 제시했고, 필기시험과 실기시험에 대한 모의 검정시험도 실시하였다. 이러한 결과를 토대로 3D프린팅전문운용사와 3D프린터개발산업기사에 대한 교육프로그램을 만들었으며, 자격검정을 실시할 수 있는 출제기준을 제시하였다.

• International Journal of Advanced Culture Technology
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• 제2권1호
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• pp.30-32
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• 2014

3D printing technology polymeric material or plastic and metallic powder to suit the drafting of additive manufacturing would gradually products soars. 3D printing technologyapplication of a wide variety of industrial sectors. 3D printing technology enables raw materials consumption is less, the supply chain are shorter depending on the load and reduce the use of fossil fuels.Emergence of 3D printing technology so called the third industrial revolution in ICT market, quickly spread worldwide.In the future, 3D printing technology is simply beyond bio-technology, Nano-engineering, the manufacture of the product, incorporating a variety of technologies to improve the quality of life of human beings have played an important role will be.

• 한국멀티미디어학회논문지
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• 제21권1호
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• pp.61-68
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• 2018

In this paper, we present an effective encryption algorithm for 3D printing models in the frequency domain of discrete cosine transform to prevent illegal copying, access in the secured storage and transmission. Facet data of 3D printing model is extracted to construct a three by three matrix that is then transformed to the frequency domain of discrete cosine transform. The proposed algorithm is based on encrypting the DC coefficients of matrixes of facets in the frequency domain of discrete cosine transform in order to generate the encrypted 3D printing model. Experimental results verified that the proposed algorithm is very effective for 3D printing models. The entire 3D printing model is altered after the encryption process. The proposed algorithm is provide a better method and more security than previous methods.

• 청정기술
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• 제26권2호
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• pp.109-115
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• 2020

최근 3년간 세계 식품 3D프린팅 시장은 연 평균 31.5%의 높은 성장률과 약 94억 6000만 달러에 이르는 산업규모를 보이고 있다. 식품 3D 프린팅 기술은 기존 식품을 자유롭게 디자인함으로써 개인의 취향과 목적에 따라 식품을 제작할 수 있어 다양한 범위로 활용이 가능하다는 장점을 지니고 있다. 세계 여러 국가에서는 식품 3D프린터를 제작하여 식품 3D 프린팅의 장점들을 활용한 음식과 같은 시제품들을 내놓고 있으며 전투식량, 우주식량, 음식점, 유동식, 노인식, 환자식, 유아식 등의 여러 분야에서까지 활용하고자 시도 중에 있다. 성장가능성이 높고 산업 규모가 지속적으로 확대될 전망인 3D 프린팅 시장은 블루오션이 될 가능성이 다분한 반면 우리나라는 식품 3D 프린팅 기술뿐만 아니라 전반적인 3D프린팅 활용률이나 산업 규모 자체가 작다. 이는 선진국에 비해 미흡한 제도화와 표준화된 국산 소재 개발이 지연 등의 문제가 존재하기 때문으로 따라서 본고에서는 식품 3D프린팅의 필요성에 대해 알리고 우리나라의 식품 3D 프린팅 시장 활성화라는 부가 효과를 얻고자 식품 3D프린팅 기술과 식품소재에 관해 기술하고자 한다.

• 한국의류산업학회지
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• 제24권5호
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• pp.505-518
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• 2022

3D printing technology, also known as additive manufacturing(AM), has not been actively used in the clothing industry despite its potential for economic, environmental, and labor efficiency. Therefore, this study aims to propose a new 3D printing method for the clothing industry, which will be more readily accessible. This roll-type printing method can print wide-sized patterns at once using a 3D modeling program and a FDM 3D printer and help overcome the limitations imposed by the size of the printer. Then, to demonstrate the practical application cases of this printing method, bags of three designs were developed. Prior to product development, a thickness test was performed for stable printing using TPU(Thermoplastic Poly Urethane) filament, and a thickness of 0.45 mm was found to be most suitable for it. Next, the time efficiency test showed that the roll-type printing method takes less time compared to the general printing method in printing wide-sized patterns. Based on these tests, three bags, , and , were developed to confirm the suitability of the roll-type printing method for product development. The advantages of 3D roll-type printing can lie in overcoming of the spatial limitation, and the environmental sustainability as it can reduce waste from the production process. This study is significant in that it presents a new 3D printing method to improve the space limitations and time inefficiency of 3D printers.

• 한국산학기술학회논문지
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• 제19권12호
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• pp.702-708
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• 2018

3D 프린팅 기술은 기존 산업계의 생산 패러다임을 변화할 수 있는 4차 산업혁명의 주요기술로 큰 관심을 받고 있다. 건설분야의 특성으로 인해 3D 프린팅의 기술 도입이 타 산업분야에 비해 느리지만, 향후 생산인구의 감소와 생산성 및 안전도 향상 등을 위해 3D 프린팅을 활용한 건설 자동화가 필요하다. 본 연구에서는 3D 프린팅을 건설에 도입하기 위한 사전준비로서 건설 3D 프린팅 공종분류체계와 기존 표준품셈체계와의 연계방안을 제시 한다. 이를 위해 건설 및 3D 프린팅 관련 전문가 자문을 바탕으로 기존 건설 3D 프린팅 기술을 바탕으로 가상의 시나리오를 작성하였다. 시나리오에 따라 3D 프린팅 공사 수행에 필요한 16개의 공종을 도출하였다. 기존 공종분류체계와 표준품셈을 분석하고 도출된 3D 프린팅 공종을 연계하였다. 기존 분류체계와 동일한 3D 프린팅 공종도 있었으며 기존에 존재하지 않는 공종은 유사한 분류체계 하위에 추가하는 등 4가지 타입으로 구분하였다. 본 연구의 결과는 향후 3D 프린팅 공사관리 및 원가산정에 도움이 될 수 있을 것으로 기대된다. 향후 3D 프린팅 공사 수행을 통해 실질적인 품셈 산출이 필요하다.

• 한국기계가공학회지
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• 제15권2호
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• pp.104-110
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• 2016

The process of three-dimensional (3D) printing (also known as "rapid prototyping" and "additive manufacturing") uses computer-created digital models to produce 3D objects with a desired shape by stacking materials through a layer-by-layer process. The industrial potential and feasibility of 3D printing technology were recently highlighted in President Obama's State of the Union address in 2013. Since his speech, worldwide investment in and attention toward 3D printing technology have increased explosively. In addition, a number of 3D printing technology-based start-up companies have been established and evaluated as emerging enterprises making successful business models. In this paper, successful start-up companies (domestic and overseas) based on 3D printing technology will be reviewed.

• Archives of Metallurgy and Materials
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• 제64권2호
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• pp.571-578
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• 2019

The densification behavior of H13 tool steel powder by dual speed laser scanning strategy have been characterized for selective laser melting process, one of powder bed fusion based metal 3d printing. Under limited given laser power, the laser re-melting increases the relative density and hardness of H13 tool steel with closing pores. The single melt-pool analysis shows that the pores are located on top area of melt pool when the scanning speed is over 400 mm/s while the low scanning speed of 200 mm/s generates pores beneath the melt pool in the form of keyhole mode with the high energy input from the laser. With the second laser scanning, the pores on top area of melt pools are efficiently closed with proper dual combination of scan speed. However pores located beneath the melt pools could not be removed by second laser scanning. When each layer of 3d printing are re-melted, the relative density and hardness are improved for most dual combination of scanning. Among the scan speed combination, the 600 mm/s by 400 mm/s leads to the highest relative density, 99.94 % with hardness of 53.5 HRC. This densification characterization with H13 tool steel laser re-melting can be efficiently applied for tool steel component manufacturing via metal 3d printing.