Fused deposition modeling and vapour smoothing process for surface finish improvement of biomedical implant replicas

Kadir Naina, Nur Shahirah (2018) Fused deposition modeling and vapour smoothing process for surface finish improvement of biomedical implant replicas. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Additive Manufacturing is a technology that is use commonly nowadays. The purpose of this project is to investigate the chemical reaction to surface roughness by using a vapour smoothing process. The objective of this project is to improve the surface roughness by using chemical reaction. Biomedical implant replicas is fabricated using fused deposition modeling machine to compare with the conventional method. This project focuses on the hip implant replicas surface and the chemical will be used obtain better surface roughness on the replicas surface. The complex shape of the hip implant can causes increasing the surface roughness if fail to find the prefect parameter combination. Design of experiment (DOE) is an effective tool to optimization of a product or process quality. DOE is also to see how changing multiple design and process variables effects to achieves the best results. The ABS product produced by Fused Deposition Modeling (FDM) has its own unique result which varies with the changes of the process parameters of the machine such as orientation angle, layer thickness and raster angles. After the chemical has selected the vapour smoothing process is done. That chemical must be a solvent properties to reduce the surface roughness. Then the replicas were observed for tested surface roughness using Mitutoyo Surftest SJ 301. The results were obtained and data was analysed. Maximum percentage change in surface roughness has reduce surface roughness. Results have found out that the maximum percentage change in surface roughness for is tetrahydrofuran has recorded the smoothest surface on replicas 21 (98.55%) with 30 minutes vapour smoothing time.

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