• Title/Summary/Keyword: 3DP(3D printing)

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The Recent Tendency of Fashion Textiles by 3D Printing (3D프린팅을 이용한 텍스타일 제조 기술동향)

  • Kim, Seul Gi;Kim, Hye Rim
    • Fashion & Textile Research Journal
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    • v.20 no.2
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    • pp.117-127
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    • 2018
  • As an application and potential of 3D printing (3DP) accelerates in diverse industries, the use of 3DP is also increasing in the textile and fashion industry. Since the fashion trend is rapidly changing and there are high demands of customized products for customer segments, research on manufacturing of 3DP textiles has become more important. 3DP textiles have different physical and chemical properties depending on a various 3D printing technologies or materials. However, it is difficult to fabricate 3DP textiles that meets demand of garment such as flexibility, wearability, tensile strength and abrasion resistance so that 3DP in fashion industry relatively has a narrow range of applications compared to other industries. The aim of this paper is to provide a trend of research about manufacturing 3DP textiles by analyzing previous studies according to textile's properties. This paper classifies the five types of 3DP textiles and analyses systematically. First, 3DP textiles blended with existing textiles. Second, 3DP textiles utilizing the structural design of existing textiles. Third, 3DP textiles designed with continuous units. Fourth, 3DP textiles utilizing material properties. Fifth, 3DP textiles based on smart materials. Based on this analysis, future research of manufacturing 3DP textiles needs are identified and discussed.

Evaluation of clinical adaptation of dental prostheses printed by 3-dimensional printing technology (3D 프린팅 기술로 출력된 치과 보철물의 임상적 적합도 평가)

  • Kim, Ki-Baek
    • Journal of Technologic Dentistry
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    • v.41 no.1
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    • pp.1-7
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    • 2019
  • Purpose: The objectives of this study was to evaluate clinical adaptation of dental prostheses printed by 3 dimensional(3D) printing technology. Methods: Ten study models were prepared. Ten specimens of experimental group were printed by 3D printing(3DP group). As a control group, 10 specimens were fabricated by casting method on the same models. Marginal gaps of all specimens were measured to evaluate clinical adaptation. Marginal adaptations were measured using silicone replica technique and measured at 8 sites per specimen. Wilcoxon's signed-ranks test was used for statistical analysis(${\alpha}=0.05$). Results: Means of marginal adaptations were $95.1{\mu}m$ for 3DP group and $75.9{\mu}m$ for CAST group(p < 0.000). Conclusion : However, the mean of the 3DP group was within the clinical tolerance suggested by the previous researchers. Based on this, dental prosthesis fabricated by 3D printing technology is considered to be clinically acceptable.

Mechanical Properties of 3D Printed Re-entrant Pattern/Neoprene Composite Textile by Pattern Tilting Angle of Pattern (3D 프린팅 Auxetic Re-entrant 패턴의 기울기 각도에 따른 네오프렌 복합 직물의 역학적 특성에 관한 연구)

  • Kim, Hyelim;Kabir, Shahbaj;Lee, Sunhee
    • Journal of the Korean Society of Clothing and Textiles
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    • v.45 no.1
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    • pp.106-122
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    • 2021
  • This study confirmed the mechanical properties of an auxetic re-entrant pattern prepared using 3D printing technology and its composite fabric with neoprene for the production of functional auxetic patterns/textiles for safety shoes. Samples were prepared by the tilt angle of a re-entrant pattern of 0°, 30°, 45°, 60° and 90°, and then analyzed using Poisson's ratio, bending, compression, and tensile properties. A 3D printed auxetic re-entrant pattern (3DP-RE) and its composite fabric (3DP-RE/NP) showed a negative Poisson's ratio in all tilting angles that indicated auxetic properties. The results of the bending property shown that strength of 3DP-RE/NP was 1.5 times lower than NP, but the strain improved 2.0 times. It was confirmed that the deformation of 3DP-RE/NP is possible with a low load. Each sample type of compression behavior indicated similar regardless of the tilting angles; in addition, the compression toughness of 3DP-RE/NP increased 1.2 times compared with NP. In the case of tensile properties, 3DP-RE and 3DP-RE/NP were affected by the tilting angle, samples with 90° (the opposite of load direction) showed best tensile property and toughness. 3DP-RE/NP indicated improved bending, compression, and tensile properties.

3D Printing of Biocompatible PM-materials

  • Dourandish, Mahdi;Godlinski, Dirk;Simchi, Abdolreza
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09a
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    • pp.252-253
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    • 2006
  • The fabrication of complex-shaped parts out of Co-Cr-Mo alloy and 316L stainless steel by three-dimensional printing (3DP) was studied using two grades of each alloy with average particle size of 20 and $75\;{\mu}m$, respectively. To produce sound specimens, the proper 3DP processing parameters were determined. The sintering behavior of the powders was characterized by dilatometric analysis and by batch sintering in argon atmosphere at $1280^{\circ}$ for 2h. The 3DP process has successfully produced complex-shaped biomedical parts with total porosity of 12-25% and homogenous pore structure, which could be suitable for tissue growth into the pores.

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Discovering Applicable Lessons for '3D Printing R/D Project' Implementation Through Studying the Process of Adopting Overseas Industrialized Building Production Technological Knowhow in the Korean Context (한국의 공업화건축 공법 도입활용과정 분석을 통한 3D 프린팅기술 개발 방향성 연구)

  • Lee, Sung-Min;Lee, Pil-Won;Cho, Hoo-Young;Lee, Jae-Heon
    • Journal of Korean Association for Spatial Structures
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    • v.17 no.4
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    • pp.59-68
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    • 2017
  • This paper aims at finding some lessons applicable to successful implementation of 'The 3D Printing R/D Project' through both examining the process of adopting overseas industrialized housing production technological knowhow by home builders during the 1970's~1980's period and thereafter until now the various efforts to adjust the technologies efficiently to the Korea's unique situation. Some meaningful lessons can be summarized as follows; I) Deep understanding of 3DP technological know-why along with its inheritance, II) Readjusting of R/D period and goals(cf. Global leader Winsun's 15 years experiment), III) Restructuring for more collaborative R/D B&E system among participating researchers IV) Fostering 3DP expert-engineers and technicians from the early stage, V) Clearing legal barriers in users' adopting 3DP methods necessary, VI) Development of appropriate building material besides concrete. Therefore, it is highly recommended that the above-mentioned 6 lessons positively accepted and applied to the Research Implementation Plan in due course, especially by KICT consortium and KAIA under the guidance of Ministry of Land, Infrastructure and Transport.

An evaluation of marginal fit of resin single crown manufactured using a dental 3D printer (치과용 3D 프린터를 활용해 제작된 레진 단일치관보철의 변연적합 평가)

  • Ki-Baek Kim
    • Journal of Technologic Dentistry
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    • v.44 no.4
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    • pp.126-131
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    • 2022
  • Purpose: The purpose of this study is to evaluate the quality of dental fixed prostheses fabricated by 3DP (three-dimensional printing). Methods: Ten main models were prepared for the study. Ten specimens were printed by 3DP (3DP group). Ten specimens were fabricated by the lost wax technique and casting method to complete the control group (LWC group). The marginal fit was measured for 20 specimens. The measurement of marginal fit was performed using the silicon replica technique. Finally, the marginal fit of 10 specimens from each group was calculated. An independent sample t-test was run to see if the calculated averages for the two groups were mutually significant (α=0.05). Results: According to the experimental results, the mean marginal fit of the 3DP group was 71.9 ㎛, and the LWC group was 55.3 ㎛. The means of the two groups were found to be significantly different (p<0.001) in the results of the independent sample t-test. Conclusion: The marginal fit of fixed dental prostheses produced by 3DP technology was examined with values greater than those fabricated by traditional technology. However, as it appeared to be a value within the range of clinically acceptable range recommended by numerous studies, it was determined that clinical application would be feasible.

Bioinspired strategy to biocompatible materials for 3D printing technology (3DP 프린팅 타입의 생체친화용 기능성 소재 개발)

  • Choe, Tae-Jong;Jo, Won-Jin;Lee, Heon-Ju;Mun, Myeong-Un
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2015.11a
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    • pp.341-342
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    • 2015
  • 3D printer는 현재 세계적으로 시장이 확대됨에 따라 다방면으로 연구가 진행되고 있다. 이중에서 3DP (Three Dimensional Printing) 방식은 석고타입의 분말 powder가 도포된 층 위에 binder가 잉크젯 헤드를 통해 분사되어 powder 층과 층 사이를 붙여가며 형상을 제작하는 적층 방식의 일종이다. 반면 한정된 소재와 비싼 가격 때문에 보편적으로 사용하기에 한계가 있으며 대부분의 소재가 인체 유해한 성질을 보유하고 있어 활용 범위가 제한적이다. 본 연구에서는 인체 무해하고 다양한 기능이 내재된 생체 친화용 기능성 소재를 개발하고 3DP 방식의 프린터 제작을 통해 생체 친화적 기능성 형상을 제작하는 기술을 개발하였다.

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3DP Printing Method using Multi-Piezo Head (Multi-Piezo 헤드를 이용한 3차원 프린팅 기법)

  • Kim, Jung-Su;Kim, Dong-Soo;Lee, Min-Cheol
    • Proceedings of the KSME Conference
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    • 2007.05a
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    • pp.1394-1399
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    • 2007
  • Recently, Study of 3D freeform fabrication method was working in the various applications. For example, in the powder base, it's laminated using a binding method or laser sintering method. However, these methods are not suitable in the office environments because it dust with powder that is bad for health. In this paper, we introduce a method of 3D freeform fabrication using a curing of photo-polymer resin and construct a system has multi printing head. A photo-polymer curing method has simply fabrication process and high strength of manufacturing part. However, this method has a problem on the multi print-head system. Because multi-printing system has a other printing method compare with a single printing system. Therefore, we experiment a single head 3D printing and proposed a 3D printing method using a multi-piezo head.

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Evaluation and Development of Multi Thermal Bubble Ink Jet 3D Printing System (다중써멀버블 잉크젯방식의 3D 프린팅 시스템 개발 및 성능평가)

  • Shin, Mun Gwan;Bae, Sung Woo;Kim, Jung Su
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.9
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    • pp.787-792
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    • 2015
  • Recently, 3D printing technology is a hot issue in various industrial fields. According to the user's application, it allows for the free form fabrication method to be utilized in a wide range. The powder based fusion technique is one of the 3D printing methods. When using this method it is possible to apply the various binder jetting techniques such as piezo, thermal bubble jet, dispenser and so on. In this paper, a multi thermal bubble ink jet was integrated for jetting of powder binding material and developing a power fused 3D printing system. For high quality 3D printing parts, it needs an analysis and evaluation of the behavior of the thermal bubble ink jet head. In the experiment, a correlation between jetting binder quantity and layer thickness of powder was investigated, and a 3D part model was fabricated, which was used by measuring the scale factor.

The Control of SFFS in the Office Environments and It's Integration

  • Kim, Jung-Su;Lee, Min-Cheol;Lee, Won-Hee;Kim, Dong-Soo
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.2164-2169
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    • 2005
  • SFFS(Solid Freeform Fabrication System) can quickly makes models and prototype parts from 3D computer-aided design (CAD) data. Three dimensional printing(3DP) is a kind of the solid freeform fabrication. The 3DP process slices the modeling data into the 50-200um along to z axis. And we pile the powder and make the manufactures. A manufacture is made by the SFFS has the precision of the 50um. Therefore the x-y table of SFFS to move a printhead must be the system that has a high speed and accuracy. So we proposed the SMCSPO algorithm for SFFS. The major contribution is the design of a robust observer for estimating the state and the perturbation of the timing belt system, which is combined with a robust controller. The control performance of the proposed algorithm is compared with PD control by the simulation and the experiment. The control algorithm of the SFFS is presented in the office environment. The system between control system and printhead for the SFFS is also integrated

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