• 소성∙가공
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• 제32권5호
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• pp.255-267
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• 2023

Recently, 3D printing using a material extrusion method is used in various fields. Since plastic material has lower strength than steel, research to increase the strength is continuously being conducted. This study investigates the lattice structure for additive manufacturing of six 3D infill patterns (octet, quarter cubic, cubic, cubic subdivision, triangles and cross 3D) which consist of tetragons, hexagonal trusses, equilateral triangles and cross shapes. Consequently, in the tensile strength considering the weight and printing time, octet, quarter cubic, cubic and triangles patterns tended to increase linearly as the infill density increased, except for the infill density of 20%. However, the tensile strength/weight performed better than the infill density of 100% when the cubic subdivision pattern had the infill density of 20% and the cross 3D pattern had the infill density of 40%. Considering the weight and printing time, the infill patterns of high tensile strength were octet, quarter cubic, cubic, cubic subdivision, triangles and cross 3D order.

• 한국CDE학회논문집
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• 제21권3호
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• pp.215-223
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• 2016

The low price around 1000 USD makes consumer 3D printers as a new additive manufacturing platform for the personal manufacturing where consumers can make and sell their own products. To allow the consumers to design and manufacture their products, not only economic 3D printers but also supporting information systems for their design and manufacturing are essential. This study suggests an extended product data management (PDM) system that can support both the design and manufacturing of personal products with consumer 3D printing services. This extended PDM system helps consumer designers use advanced PDM technologies for their design and connected 3D printing services with Internet of Things (IoT) technology for realization of their products. As a result, the proposed system supports the consumer designers a seamless integrated product development and manufacturing environment supported by PDM and consumer 3D printing services.

• 정보교육학회논문지
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• 제21권4호
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• pp.451-462
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• 2017

본 연구는 학교에서 도입가능성이 높다고 판단된 신기술인 3D 프린팅 활용 교육을 연구대상으로 선정하였다. 연구는 크게 3D 프린팅 활용을 위한 학습활동 프레임워크 제안과 3D 프린팅 활용 교육의 현장적용 가능성을 모색하는 두 단계로 실시하였다. 본 연구에서 제안하는 '3D 프린팅 활용 학습활동 프레임워크'는 '문제 해결과정의 복잡성'과 '협동적 상호작용'을 두 축으로 하여, 1단계는 재현을 통한 제작, 2단계는 상상 표현의 수단, 3단계는 근접한 문제 해결, 4단계는 확장된 문제 해결의 네 단계로 활동을 구분하였다. 두 번째 연구목적인 학교현장에서의 사례 연구를 위해 초등학교 6학년 23명의 학습자를 대상으로 수학교과에 3D 프린팅 활동을 접목한 수업을 실시하였다. 학생들은 '1단계 재현을 통한 제작'에 3D 프린팅을 활용하여 다양한 도형의 형태와 부피를 학습하였다. 연구결과 참여 학습자들이 전반적으로 3D 프린팅 기술을 활용한 수업의 효과성에 대해 긍정적인 학습경험을 보였으며 학습경험의 질 및 만족감 또한 높은 것으로 나타났다. 반면, 3D 프린터 및 CAD 프로그램의 사용성에는 개선이 필요한 것으로 나타났다. 본 연구는 향후 3D 프린팅 활동 설계를 가이드할 수 있는 거시적 프레임워크를 제안하고, 단순 흥미를 넘어서 교과연계성을 가지는 3D 프린팅 활동의 가능성을 탐색했다는 점에서 그 의의를 찾을 수 있다.

• 패션비즈니스
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• 제24권6호
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• pp.80-88
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• 2020

This study, by analyzing previous studies, aimed to understand how 3D printing technology is applied and utilized in the fashion industry and to contribute to encouraging further studies on 3D printing technology in the fashion sector and suggesting proper ways for designing such studies. Firstly, 47 papers were selected from all literature concerning 3D printing technology published in 15 journals of fashion and design since 2013. Afterwards, these papers were analyzed with regard to the frequency, topics or sectors, and purposes or types of studies shown by outcomes. Results were as follows: First, the number of papers on 3D printing technology published in the journals was counted according to the year, which showed that this number increased rapidly after 2015 for about 3 years. Especially in the year 2016, this increase was quite notable. Although a little decrease in this number was found afterwards, a steady increase was highly expected. Out of the 8 journals, Journal of The Korean Society of Fashion Design had the maximum papers. Regarding areas of studies, works on designing and development of products were most common. Finally, regarding the purpose of studies, those suggesting or presenting apparel were predominant. Product items included clothes, shoes, and caps. Studies on caps mostly covered designing the products. Studies on clothes aimed at designing, characteristics of construction, and case study. However, there were very few works on 3D printing technology as an alternative material or composition of clothing.

• 한국기계가공학회지
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• 제16권6호
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• pp.101-108
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• 2017

Recently, the patent rights for 3D printing technology have expired, while 3D printers with RP (Rapid Prototyping or Additive Manufacturing) and 3D printing technologies are receiving attention. In particular, the development of 3D printers is rapid in Korea, thanks to the increasing sales and popularity of FDM (Fused Deposition Modeling or Fused Filament Fabrication) 3D printers. However, the quality and productivity of the FDM 3D Printer are not good, so customers prefer the DLP (Digital Light Processing) method to avoid these shortcomings. The DLP method has high quality and productivity. However, because of the stereolithography equipment, it has few studies compared to optimal values for elements then FDM 3D printing study. In this study, to find the optimal conditions for 3D printing with the DLP method, the aim is to obtain the optimal values (strength, final time, quality) by changing the light exposure time, layer thickness, and z-axis speed.

• 대한정형외과학회지
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• 제53권6호
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• pp.466-477
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• 2018

정형외과는 인체의 모든 근골격계를 담당하기 때문에 3차원(3-dimensional, 3D) 프린팅 기술을 가장 많이 활용할 수 있는 분야이다. 구체적으로 관절염, 척추, 외상, 기형, 종양 등의 다양한 정형외과 질병에 대해 해부학적 모델, 수술용 가이드, 금속 임플란트, 바이오-세라믹 재건, 보조기 등의 형태로 활용될 수 있다. 특히 정형외과 종양 영역은 환자마다 종양의 발생 위치와 크기가 다양한 데 반하여 사지 보존 수술에 활용할 수 있는 기존의 수술 방법이 제한적이었기 때문에 3D 프린팅 기술의 활용이 매우 절실한 분야였다. 최근에 3D 프린팅 환자 맞춤형 임플란트를 짧은 시간 내에 쉽게 제작할 수 있게 되면서 기존 방법으로 골 재건이 어려웠던 부위에 대해서도 해부학적 재건이 가능하게 되었다. 3D 프린팅 기술을 의료 영역에서 더욱 폭넓게 사용하기 위해서는 디자인, 출력, 검증 과정에 필요한 많은 전문가들과 함께 수평적 위치에서 긴밀히 협력해야 한다. 의료계에서 3D 프린팅을 활용을 선도함으로써 다른 분야의 전문가 양성 및 3D 프린팅 관련 산업의 발달을 촉진시킬 수 있다고 판단한 정부도 규제보다는 활성화에 역점을 두고 적극적으로 지원하고 있는 추세이다. 앞으로 정형외과가 전체 의료계에서 3D 프린팅 기술의 도입과 활용을 선도해 가기를 기대하면서 골종양 수술에서 3D 프린팅 기술을 활용하였던 저자의 경험을 소개하고자 한다.

• 패션비즈니스
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• 제22권2호
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• pp.1-13
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• 2018

3D printing technology, which is expected to play a leading role within the Fourth Industrial Revolution, is becoming distinguished not only in the space, automotive, medical and engineering industries, but also in the area of design. The fashion and textile structures created by 3D printing technology were classified into three types - basic structure, unified structure, and a new physical structure. When traditional weaving, knitting, and stitching was reinterpreted through 3D printing, there were apparent limitations in reproducing the characteristics of fabric structures due to differences in the materials and structures of traditional textiles. New physical structures are being developed to break away from merely reproducing traditional textile structures, and to bring out the characteristics of 3D printing technology. As examples of new physical structures, there are the kinematics structure which utilizes the hinge method, mesostructure cellular material, and the N12 disk structure. Such techniques potentially open a new paradigm of fashion and textile structures. Some innovative aspects of 3D printing technology may result in changes in the methods of collaboration, manufacturing, and distribution. Designers are receiving help from specialists of various backgrounds to merge 3D printing technology to create original works. Also, 3D printing not only makes personalized custom designs available, but shortens the distribution channels, foretelling a change within the fashion and textile industry.

• 한국기계가공학회지
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• 제18권11호
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• pp.96-102
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• 2019

Reverse engineering involves duplicating a physical part by measuring and analyzing its physical dimensions, features, and material properties. By combining reverse engineering with three-dimensional (3D) printing, engineers can simply fabricate and evaluate functional prototypes. This design methodology has been attracting increasing interest with the advent of the Fourth Industrial Revolution. In the present study, we apply reverse engineering and 3D printing technologies to evaluate a fabricated automotive inner ring prototype. Through 3D printing, inner rings of various densities were prepared. Their physical dimensions were measured with a 3D scanning system. Of our interest was the effect of inner ring density on the physical dimensions of the fabricated prototype. We compared the design dimensions and physical dimensions of the fabricated prototypes. The results revealed that even the 20% density of inner ring was effective for 3D printing in terms of satisfying the design requirements.

• 한국공간구조학회논문집
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• 제19권4호
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• pp.85-94
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• 2019

Then 3D printing is used practically at construction sites, there is a serious lack of studies on the conflict with construction-related laws and expected operational problems. Accordingly, the purpose of this study is to present obstacles and directions for improvement in construction-related laws (Building Act, Construction Technology Promotion Act, Housing Act, Construction Machinery Management Act, etc.) for practical operation of 3D printing. The important results are as follows. Amending existing construction-related laws for 3D printing is irrational and inefficient in terms of structure and material. This study proposed a method of satisfying performance required by laws or standards based on the performance design method presented in existing laws and systems through structure and material performance certification procedure. In addition, inclusion of 3D printing equipment in the Construction Machinery Management Act results in various restrictions such as equipment inspection and certification of machine parts. As such restrictions can block vitalization of 3D printing, a long-term and step-wise approach was suggested.

• 기술혁신학회지
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• 제22권1호
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• pp.119-157
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• 2019

3D 프린팅 산업의 종사자들이 3D 프린터의 도입을 결정하는 의사 결정에 어떤 인자들이 영향을 주고, 인자들의 역할을 파악하는 것이 중요하다. 이를 통해 국내 기업 등에서 활용되는 3D 프린터의 활용 증대 및 관련 산업 투자 증가로, 국내 3D 프린팅 산업의 발전에 기여할 수 있는 방안을 찾고자 한다. 3D 프린터는 기술의 발전, 대중의 관심, 투자의 활성화에 따라 급속한 발전을 이룩하고 있다. 외국은 장비, 소재, S/W, 산업 활용 등에서 괄목할 발전을 거두고 있으나, 국내에서는 예상보다 저조하다. 3D 프린터 산업의 활성화 및 저변 확대를 위해 원활한 3D 프린터의 도입이 필요하나, 실제 도입 및 현장적용에는 상당히 미흡한 실정이다. 문헌조사를 통해 경제성, 기술성, 환경성을 대표하는 독립변수들을 선정하였고, 3D 프린팅 산업에 대한 사회환경융합형 통합기술수용모델을 제안하여, 독립변수들이 3D 기술 수용의도에 어떤 영향을 미쳤는지를 독립변수 상관분석법, 무상관 회귀분석법 등을 통해 조사하였다. 본 연구를 통해 기업이 3D 프린팅 기술 및 장비의 도입을 위해 출력단가와 같은 경제성 요인과 정부지원, 3D 컨텐츠 같은 환경성 요인들이 유기적으로 확대 발전해야 한다는 점을 확인하였다. 이는 정부의 체계적이고 실효적인 지원이 필요하고, 사용자인 기업이 직접 체감할 수 있는 경제적 지원과 관련 법령, 제도 등의 개선이 필요하다. 경제적, 기술적 시간적 투자가 진행되어야 국내의 3D 프린팅 산업이 발전되고 이를 토대로 3D 프린팅 산업을 4차산업혁명의 핵심 동력으로 삼아야 할 것이다.