![]() Now that you have your patterns it's time to fire up the foundry. I uploaded the G-code if you want to use my pattern. I was too impatient to wait longer for a smoother cut and I thought the they looked interesting. The ridges in the pattern are because I cut it out at a low resolution. It took about 20 minutes to cut each piece. This is where the aluminum will enter and exit the mold. Make sure that you add two sprues off the top of the heart. I cut out the heart in two pieces and glued them together. I cut out my heart patterns on a cnc router (I got the cnc bug from this excellent instructable: ended up using plans from here: which ended up being a two year diversion) You certainly don't need to use a cnc router to make your pattern. It's possible to use white beadboard but it's crumbly and won't give as good of a resolution. You want the pink or blue stuff that they sell at the hardware store. First you need a pattern of what you want to cast.
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