Design And Analysis Of Pressing Mechanism For Imroving 3D Printing Process

Ibrahim, Muhammad Hafiz Helmi (2019) Design And Analysis Of Pressing Mechanism For Imroving 3D Printing Process. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Three-dimensional printing is a method in which a digital model is transformed into physical object by adding material layer by layer. Despite rapid progress of 3D printing, there are still several area that can still be improve. In 3D printed object, there are many porous areas because of the circular shape of the printed filament. As amount of porous increase, the strength of the printed object decrease. The purpose of this paper is to design new pressing mechanism that act as an attachment to the existing 3D printer and to analyse the effectiveness of the developed system. The selection for the pressing mechanism was made using morphological chart. The prototype for this mechanism was integrated to the existing Fused Deposition Modeling (FDM) 3D printer to apply pressure during printing process. For the pressing mechanism to be tested, a dog bone sample was printed to use for the experiment. Original dog bone samples are compared to the sample with pressure applied on it. Infill density and printing speed are the parameter chosen to be tested. Through the length, width, thickness, surface roughness test, tensile test, and porosity test, the mechanical properties and the dimension of parts fabricated by the new mechanism were obtained. Results show that sample with pressure for infill density parameter were better compared to original sample. As for the speed parameter, sample with pressure applied did improved the porosity percentage of the sample but only at lower printing speed. The pressing mechanism does help improved the strength of the printed object but at the cost of sacrificing the actual dimension of the samples.

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