Digital technologies/3D printing/3D printing- Intermediate/Post-Processing 3D prints

There are a number of post processing possibilities with 3D printed models. The options available are dependent on the material used. In this section, post-processing possibilities for PLA that are available in the Makerspace will be explored. The video below will explain the basics of post-processing. Everything used in the video is available at the finishing station in the Makerspace.

The most basic post-processing procedure is support removal. The Ultimaker 2+ printers in Makerspace are single extruder printers which means the supports are printed using the same material as the main model. Typically, the supports are easily removed by breaking them off the printed model. However, when supports are placed in tight corners or hard to reach places, additional tools such as pliers will be needed to remove the material. Dual extruder printers will allow you to print the supports with a different soluble material than the main part. This means the difficult to remove supports can be dissolved away by soaking it in another liquid.

Another basic procedure is sanding. 3D printed parts will often have rough surfaces from the layers. Sanding is the easiest way to create a smooth surface. At the finishing station, there are sandpaper of different grit sizes to sand down your model. There are also files at the station for edges and holes. It is important to sand the surfaces in circular motions to ensure the aesthetics of the model.

Gluing the model is one of the most common post-processing options to attach parts together. There are many glue options available at the Makerspace, including super glue and hot glue. Hot glue is easy to use but it will leave a visible gap as 2-3mm of glue is needed to secure the parts together. Hot glue is also not very strong. Super glue is a good option for a seamless seal that cures fast.

Painting is one of the most common finishing processes. The model needs to be primed first before being painted. The model should be sanded with a low and then medium grit sandpaper. Prime the model with a coat of primer paint. Once everything is dry, you can start painting your model with other colors. Acrylic paint and paintbrushes are available to use at Makerspace.