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- W3011196600 abstract "This research focuses on the development of nozzle specifically for opensource3D printing for extrusion of synthetic biomaterials. The factors thataffect the stability, consistency and accuracy of the extrusion process wereinvestigated by using finite element analysis (FEA) including nozzle die angle,nozzle diameter and liquefier design. From the simulations, it is seen that thedie angle and nozzle diameter affect the pressure drop along the liquefier. Thepressure drop variation has affected the road width of the printed parts, thusaffecting the quality of the finished product. Based on the simulations, theconvergent angle for extruding polylactic acid (PLA) andpolymethylmethacrylate (PMMA) materials was found in this research at 130owhich provides stability and consistency of the extrusion process. For efficientprinting process, nozzle diameter of 0.3 mm was found to be the optimum withrespect to pressure drop and printing time. The liquefier design plays animportant role in maintaining the liquefier chamber’s temperature as constantas possible. The temperature variation has caused the changes in viscosity ofthe material, thus affecting the quality of the finished parts. Liquefier incylindrical shape has been identified as the solution in minimizing the problemsas it has been proven from the simulations that portray improved temperaturedistribution. The newly developed nozzle was compared with the originalnozzle with respect to dimensional accuracy and mechanical properties andshows that the newly developed nozzle had a better performance in bothcriteria. By solving the issues related stability, consistency and accuracy of theextrusion process, the scaffold structure was successfully fabricated withcompressive strength between 6 MPa to 7 MPa and porosities between 50%and 70% which is the range for trabecular bone. Furthermore, humerus boneswas successfully fabricated with controlled porosity." @default.
- W3011196600 created "2020-03-23" @default.
- W3011196600 creator A5034298643 @default.
- W3011196600 date "2018-01-01" @default.
- W3011196600 modified "2023-09-27" @default.
- W3011196600 title "Development of printer nozzle for extruding synthetic biomaterials using fused deposition modeling process" @default.
- W3011196600 hasPublicationYear "2018" @default.
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