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Cross-section Morphology and Surface Roughness of an Article Manufactured by Material Extrusion-type 3D Printing according to the Thermal Conductivity of the Material

  • Woo, In Young (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology) ;
  • Kim, Do Yeon (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology) ;
  • Kang, Hong Pil (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology) ;
  • Lyu, Min-Young (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology)
  • Received : 2020.01.10
  • Accepted : 2020.02.13
  • Published : 2020.03.31

Abstract

Material extrusion (ME)-type 3D printing is the most popular among the 3D printing processes. In this study, the cross-section morphologies of ME-type 3D printing manufactured specimens were observed with respect to the thermal properties of the material. The cross-section morphology of a specimen is related to the deposition strength, and the outside profile of the cross-section is related to the surface roughness. The filaments used in this study, with different thermal conductivities, were the acrylonitrile-butadiene-styrene (ABS), the high impact polystyrene (HIPS), the glycol-modified polyethylene terephthalate (PETG), and the polylactic acid (PLA). The cross-sections and the surfaces of the 3D manufactured specimens were examined. In ME-type 3D printing, the filaments are extruded through a nozzle and they form a layer. These layers rapidly solidify and as a result, they become a product. The thermal conductivity of the material influences the cooling and solidification of the layers, and subsequently the cross-section morphology and the surface roughness.

Acknowledgement

Supported by : 서울과학기술대학교

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