Preparing for molding

Since we had to Dremmel away some plastic, we end up with some holes in our part. We don't want this to affect our mould, and we'd like nice smooth parts. See, 3D prints are not solid. They are hollow with geometric shapes within them. Most commonly, they are honeycombed internally. So Dremmeling exposes these honeycombs, and they need to be filled. One quick way of filling in the holes is with hot glue. You must be careful though. Hot glue can soften your print and even melt it, so you have to work quickly and in small spurts. Burying your part in hot glue will destroy it. You can see the process of filling in the gaps of the object using hot glue in the following image:

Now, we need to make a mould container. Simple foam-core boards and some hot glue do the trick to create a box around our object, as shown in the following image. We hot-glue our part at the bottom of the mould: