Surface World March 2019 SW_March_2019_LR | Page 21

work on it, as shown in Figure 4, where the effect of polishing a 3D printed product can be seen. Fig. 3: Selective Laser Melted silver ring However, the major issue with 3D printing as a substitute for electroforming is with the surface finish; the surface finish is related to the assembly platform step iteration and the particle size of the powder being used. If a very smooth surface is required, 3D printed components will inevitably require further Fig 4: As manufactured and after polishing The possible need to polish a 3D printed component puts it at a distinct disadvantage against an electroformed product. Other advantages of electroforming include its established base knowledge, the large range of engineering metals that can be used and the relatively low costs of manufacturing both prototypes and high volumes. At present 3D printing is usually limited to small batches or prototyping of small components; this is because it does not scale up very well due to the costs of the equipment and possibly the limited range of suitable materials. However, that is not to say that in the future it will become commercially viable to manufacture large and high volume components. After all, who, in the 1870’s, would have thought that the internal combustion engine would have put most blacksmiths out of business? Trevor Crichton Science Committee Chairman Membership Education & Training The Institute of Materials Finishing has represented the interests of individuals and companies engaged in all aspects of surface finishing since 1925. The Institute of Materials Finishing has represented the interests of individuals and companies engaged in all aspects of surface finishing since 1925. Join the professionals today! take the step to start now! Official Sponsors of Surface World Live Contact Karen Yates 0121 622 7387 or [email protected] Proud supporters of the British Surface Treatment Industry www.materialsfinishing.org