화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.42, No.5, 752-762, September, 2018
DOI10.7317/pk.2018.42.5.752  Export Citation
압출방식 3D 프린팅 적층물의 단면 형태와 적층강도와의 관계
Relationship between Deposition Strength and Cross-section Morphology of a Material Extrusion-type 3D Printing Manufactured Article
윤해성, 류민영†, 진선철1
  • 서울과학기술대학교 기계시스템디자인공학과
  • 1삼양사 화학연구소
Hye Sung Yoon, Min-Young Lyu†, and Sun Chul Jin1
  • Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
  • 1Samyang Chemical R&D Center, 730 Daedeok-daero, Yusung-gu, Daejeon 34055, Korea
E-mail:
초록
3D 프린팅 중 재료압출방식(material extrusion type)은 사용이 간편하고 다양한 소재가 가능하며 경제적이어서 이의 활용도가 가장 높다. 본 연구에서는 재료압출방식 3D 프린팅에서 적층물 단면의 모폴로지를 관찰하고 적층 강도와의 관계를 분석하였다. 사용한 재료는 ABS, PLA, 그리고 PC이며 적층온도를 달리하여 적층물 단면의 형태를 광학현미경과 주사전자현미경으로 관찰하였다. 적층물의 단면은 적층 로드가 접촉된 세로방향과 가로방향의 네크 길이, 그리고 적층로드가 채워지지 않은 에어 홀로 구성되어 있다. 적층온도와 재료의 물성에 따라 네크의 길이와 에어 홀의 밀도가 다르게 관찰되었다. 에어 홀의 밀도는 PLA에서 가장 작았고, ABS에서 가장 컸다. 사용한 모든 소재에서 네크 길이와 에어 홀 밀도는 적층온도에 직접적으로 관련이 있었고, 온도가 높을수록 네크 길이가 길고 에어 홀의 밀도가 줄어들었다. 네크 길이가 길수록 에어 홀의 밀도가 작을수록 적층강도는 비례적으로 증가하였다.
Material extrusion (ME)-type printing is the most popular among the 3D printing processes because it is easy to operate, economical, and can be performed for a variety of materials. In this study, the cross-section morphology of a ME-type 3D printing manufactured specimen was observed, and the relationship between cross-section morphology and deposition strength was analyzed. The materials used in this study were acrylonitrile-butadien-styrene (ABS), polylactic acid (PLA), and polycarbonate (PC), and the cross-section morphology for various nozzle temperatures was observed using an optical microscope and a scanning electron microscope. The cross-section morphology of a 3D printing manufactured specimen consisted of vertical and horizontal neck lengths, which were the interfaces between roads and air holes, where the roads were unoccupied regions. It was observed that the neck length and air hole density were dependent on the nozzle temperature and material property. The lowest and the highest air hole density were observed in the PLA and ABS specimen, respectively. Neck length and air hole density were directly related to nozzle temperature. A higher nozzle temperature provided a longer neck length and a lower air hole density. The deposition strength increased as the neck length increased, and the air hole density decreased.
Keywords:material extrusion-type;3D printing;air hole density;neck length;deposition strength
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