용융 적층식 3D 프린팅의 형태 왜곡현상 유형화를 통한 재현성 향상 방향

Abstract

Since the phase-out of patent rights, 3D printing has been attracting much attention andinvestment to expand the 3D printer's output and convenience. However, as much as its highdistribution rate to the general public, additive fused deposition 3D printing method also has avery high complaints by its users. Therefore In this study classified distortion into three typesbased on temperature, velocity, and pressure, based on the investigation on printing conditionsand formative environment of output shown on Korea's leading 3D printing community websites. As a result, considering the improvement of reproducibility by computer modeling, output fileconversion, and mock-up output step, which are three output types of distortion, namely,spreading, sagging and shrinking. First, the spreading phenomenon is mainly caused by adifference in temperature between added layers, which can be improved by adjusting themolding environment so that the temperature difference between object layers does not occur inthe output file conversion step. Second, the deflection phenomenon can be improved by adding asupporter automatically in the computer modeling step or adjusting the object setting direction inthe file conversion step. Third, the shrinkage phenomenon is mainly caused by the temperaturedifference between the output parts. In order to prevent the shrinkage, an auxiliary object isarbitrarily created in the computer modeling step, or the thickness is adjusted by adjusting thethickness of the inner and outer filling in file conversion step. A relatively common phase ofthree types of distortion is to maintain the machine's underlying environment. Therefore, thereproducibility enhancement of distortion can be effectively adjusted mainly in the computermodeling and file conversion stages.