The Multimaterial Dragon

From the recent video, here are a couple of images of the dragon, cut from acrylic, aluminium, corian, carbon fibre, brass, copper, MDF, ply and melamine (and the assembled dragon is acrylic and aluminium).

colour dragon02 dragonheadDesign from MakeCNC.com

Just been to the aluminium merchants, and picked up another $600 worth of aluminium sheet, from 1.5mm to 6mm thickness for some upcoming projects.

Corian

Been looking at a few different materials as part of this exercise on routing (CNC) a range of alternate materials and surfaces.  Had a closer look at Corian today, and while I was generally aware of the term, and the look/feel of kitchen benches made of the stuff, I didn’t actually know much more about it.  While this is unlikely to be news to everyone, a bit more information about what this product is may be quite interesting.  Not sure how I missed knowing more about it until now, but there you have it – can’t know everything!

Turns out it is around 50-50 polymethyl methacrylate with aluminum trihydroxide filler.  To put that in more common terms, it is around 50% acrylic polymer, and 50% alumina trihydrate, which is a product derived from bauxite.  Bauxite, as you may well know, is the raw material that is processed into aluminium.

Makes a lot more sense to me now why some people have been using it to make pens on the lathe!  Probably makes a bloody good pen if the truth be known, look, feel, finish and weight.

While it can be thermoformed into various shapes, it can also be machined relatively easily as well.  So I will be rather interested to see how it goes on the CNC, both in shaping, even 3D work, and engraving.  A number of router bits in my CNC collection are rated to handle solid surface materials, including the 3D cutters.  Think it will look rather interesting, and opens the door to combining it as another material in a mixed material project.  Especially given its machinability.

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