A Study on Effect of Layer Height and Nozzle Size of Radiation Shielding Production Using FFF Type 3D Printer
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Abstract
The purpose of this study is to investigate and discuss the effect of the printing parameters of copper blend filament shielding by FFF.In order to improve the quality of metal blend filament printouts, it is necessary to understand the principles of 3D printers and to have an excellent combination of parameter settings of intrinsic factors and additional factors. Essential factors include the atomic number and density of the material, while additional factors include nozzle size, layer height, inner pattern, and fill density. Parametric study of product properties is an important subject for quality improvement. Appropriate adjustment of additional elements between parameters can improve output quality. Among them, in the case of a shield made with a 3D printer, the internal structure is more important than the external quality. 3D printing uses 15-20% packing density, but shielding should be set to 100% packing density. This is because, as the packing density increases, the material of the filament used reacts with the intensity of radiation and radiation attenuation to shield the radiation.Nozzle size and bed height were chosen as key parameters. The nozzle sizes were changed to 0.4, 0.6, and 0.8 mm, and the layer height was changed to 0.1, 0.2, 0.3, and 0.4 mm, respectively. Additionally, the filament thickness varied between 1.75mm and 2.85mm. The main results were that the shielding performance was irregular with the change in nozzle size, and the shielding performance increased with decreasing layer height and thicker filament thickness. Printing time also decreased as nozzle size and layer height increased and filament thickness increased. In this study, the shielding performance was shown to be affected by the parameters, and it was confirmed that the correct use of the parameters in shielding production improves the shielding performance. This can provide basic data for 3D printed shielding manufacturing.