This is the first time I did sand casting with a core. The core is made from Play Sand and sodium silicate. I put the core in a sealed box with baking soda and vinegar. The carbon dioxide produced hardens the sodium silicate. 3 pins at the top of the core stop it from floating up when I put in the metal.
The pattern was made using a 3D printer. It still amazes me but I can go from ideas in my head a 3D printed model to an aluminium cast in my own back garden.
A few lessons that I've learnt. I need to put ridges in my new casting boxes to stop the sand slipping up and down that nearly ruined the whole cast. I also need to paint the pattern and send it down to avoid ridges showing up in my casting
