|Monthly Tech-Tip |
We will have converted the recipe into a casting slip for this. Results will be posted here when ready. This method could be quite practical since it is relatively easy to 3D print a form to enable casting a multi-cone plaster mold. This is version 1.0 of the mold, it works sometimes, but the sharp angle on the spine of the cone is hampering release. It was also printed on its back to avoid the need for support, but next time I will print it upright and make the top a separate piece. And it should be possible to cast them back-to-back that way Orton presses them. If this works we will make the 3D drawing available for download in your Insight-live account (in the Files manager). There is a lot of interest in this project, many manufacturers need to cut costs and this could be one way, cones are very expensive in some parts of the world. And hard to get.
Supply chain problems are hitting everything. Even cones. It turns out one can make these! The shape of a self-supporting cone is easy to draw in 3D (I did it here in Fusion 360). It is a 25mm equilateral triangle base lofted to a 3mm one 65mm straight up on the front side. And then a cut-out across the front. By using 3D printed press molds and plastic clay I can press these by the dozen. What about a recipe? Cones melt short of being glazes but beyond being porcelains. I chose L3685Z3 engobe as a starting point, it has a linear vitrification curve spanning a wide range. Approaching this on the material level, not as a chemistry project, I did three iterations of adding Ferro frit 3110 to the engobe. Shown here are the second, "A" and third, "B" (on the right is an Orton cone 6). B has too much frit, A does not have enough. You likely guessed what I did next: Mixed A and B. The result was almost perfect, bent just a little too much. If you would like this 3D file in Fusion 360 format, it is available in the Files manager in your Insight-live.com account.