A Study on the Change of Displacement according to the Drainage Pump Outlet Shape and Size of Combat Equipment.

Fused Deposition Modeling (FDM) is one of the various Rapid Prototyping (RP) processes fabrication a complex three-dimensional (3D) physical model by depositing fused thermoplastic material in two-dimensional (2D) layer by layer. Coarse surface roughness due to the stair-stepping effect should be improved for better quality of a fabricated part, moreover its material strength and tightness should be enhanced by increasing bonding effect between the material particles. In this study, some practical approaches are addressed to guarantee the surface of roughness and tightness, such as shrinkage test, tightness test and tensile strength test of the specimen after post-processing. The proposed method is found to be very efficient way to be more accurate dimensioning and providing a more sufficient strength of the fabricated part.

A study of post-processing methods for improving the tightness of a part fabricated by fused deposition modeling

The principle of the FDM(fused deposition modeling) process is based on the layer by layer manufacturing technology, like other RP(rapid prototyping) process. In the FDM process, each layer may have different shape. Therefore, the built model may have stairs shape on its surface. This stairs shape is one of the serious problems in the FDM process. Thus in this study, cube models and spherical models were fabricated by FDM process to investigate the influence of injection amount on surface roughness. Models with various road width were also built to investigate the influence of road width on surface roughness. Surface roughness of the models was measured and analyzed. The result obtained in this study are expected to help selecting the part build orientation for optimum surface roughness.

Influence of Injection Amount Variation on Surface Roughness at FDM

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Influence of Injection Amount Variation on Surface Roughness at FDM