표제지
목차
국문요약 8
Abstract 9
제1장 서론 10
제2장 이론적 배경 12
2.1. 3D 프린팅 개요 12
2.2. 3D 프린터 종류와 특성 13
2.2.1. FDM (Fused Deposition Modeling) 14
2.2.2. PolyJet 14
2.2.3. SLA (StereoLithography Apparatus) 14
2.2.4. SLS (Selective Laser Sintering) 15
2.2.5. InkJet 15
2.2.6. DLP (Digital Lighting Process) 15
2.3. FDM 출력물의 후처리 필요성 16
2.4. FDM 출력물의 표면처리법 17
2.4.1. 표면 마모 처리 18
2.4.2. 퍼티를 이용한 표면 처리 18
2.4.3. 용매를 이용한 표면 처리 19
제3장 시험 방법 20
3.1. 시편 제작 방법 20
3.2. 훈증 방법 24
3.3. 시험 방법 26
3.3.1. 광학 현미경 26
3.3.2. 3D 스캐닝 27
3.3.3. 표면 조도 29
3.3.4. 인장 강도 30
제4장 시험 결과 31
4.1. 광학 현미경 31
4.2. 3D 스캐닝 34
4.3. 표면 조도 43
4.4. 인장 강도 45
제5장 결론 50
참고 문헌 51
Table 1. 3D printing technology classification (ASTM 2012) 13
Table 2. 3D printing conditions 21
Table 3. Ra, Rq, Rz factors of specimens by different fumigation time 43
Figure 1. Schematic diagram of 3D printer 12
Figure 2. Problems of FDM printing output (removing supporter (left), surface... 16
Figure 3. Schematic diagram of FDM printing output (before (left) and after... 17
Figure 4. Various types of sandpaper 18
Figure 5. Various types of putty 18
Figure 6. Swelling and dissolution of polymers 19
Figure 7. Image of FDM 3D printer 20
Figure 8. Schematic diagram of 3D printing pattern 22
Figure 9. Specimen Dimension of ASTM-D638 typeIVB(이미지참조) 22
Figure 10. Specimen image of 3D FDM printing 23
Figure 11. Image of fumigation apparatus 24
Figure 12. Image of drying specimens 25
Figure 13. Images of optical microscope 26
Figure 14. Image of 3D scanner 27
Figure 15. Methods of 3D scanning analysis 28
Figure 16. Images of surface roughness tester and measurement methods 29
Figure 17. Image of universal testing machine 30
Figure 18. Optical microscope images of 3D printing outputs at various fusing time 32
Figure 19. Schematic diagram of mechanism gelling process 33
Figure 20. Schematic diagram of change polymer chain structure by fumigation 33
Figure 21. 3D scanning images of specimens 34
Figure 22. Dimensional deviation result of 3D printing output without fumigation 35
Figure 23. Dimensional deviation result of 3D printing output with fumigation for 1min 36
Figure 24. Dimensional deviation result of 3D printing output with fumigation for 5min 37
Figure 25. Dimensional deviation result of 3D printing output with fumigation for 10min 38
Figure 26. Dimensional deviation result of 3D printing output with fumigation for 20min 39
Figure 27. Dimensional deviation result of 3D printing output with fumigation for 30min 40
Figure 28. Dimensional deviation result of 3D printing output with fumigation for 40min 41
Figure 29. Dimensional deviation result of 3D printing output with fumigation for 50min 42
Figure 30. The change of Ra during fumigation 44
Figure 31. Tensile stress-strain graphs of output and with fumigation for 1min 45
Figure 32. Tensile stress-strain graphs of output with fumigation for 5 and 10min 46
Figure 33. Tensile stress-strain graphs of output with fumigation for 20 and 30min 47
Figure 34. Tensile stress-strain graphs of output with fumigation for 40 and 50min 48
Figure 35. Tensile stress and strain of specimens 49