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A Study for the Mechanical Properties with Infill Rate in FDM Process to Fabricate the Small IoT Device

소형 IoT 기기 제작을 위한 FDM 프린팅 공정에서의 내부채움에 따른 물성치 변화 연구

  • Ahn, Il-Hyuk (School of Mechanical Engineering, Tongmyong University)
  • 안일혁 (동명대학교 기계공학부)
  • Received : 2020.08.12
  • Accepted : 2020.09.09
  • Published : 2020.09.30

Abstract

Recently, the size of the IoT sensor has been decreased and the collecting direction of the IoT sensor for acquiring the data have been changed from 2D to 3D. It makes sensor structure complex. In the fabrication of the complex structure, 3D printing technology has more useful than traditional manufacturing technologies. Among 3D printing technologies, FDM (fused deposition modeling) is a candidate technology to fabricate a small IoT sensor because the price of the machine and the material is cheap. In the FDM process, a 3D shape is made by depositing the melted filament. Recently, the patent of FDM technology is expired and cheat machines are developed based on the open-source. In the FDM process, mechanical properties of a fabricated part is affected by a lots of factors such as the kind of material and process parameters. Among them, infill is affecting the mechanical properties and the production lead time as well. In this work, a new method to optimize the FDM process with the consideration of mechanical property and production lead time was proposed. To verify the method, the fabrications were performed with the different infill rates. The results of tensile tests were analyzed to verify the proposed method.

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