Now I have been experimenting with this with casting out of aluminum bronze, I have created a sprue and am looking for others to help in the research or if people are just interested in the file I will be providing that as well.
Things to note about casting;
Hot metal=expansion
Cold metal= contraction
I will provide the file at 100%
Depending on which metal you use, you will have to experiment with varying degrees off expansion to compensate for shrinkage on specifications. I wanted to start a thread to help those that want to own metal super safeties without the cost of metal 3d printers or cnc mills. I'm simply using a $120 propane blast furnace and have some pretty good results.
Using the lost pla method my process is;
Molds are plaster,sand and water. 1 part each by weight. Molds are then burned out in the propane blast furnace. Let mold cool down IN the furnace till cool to touch to avoid mold cracking. Inspect mold and lightly blow air through sprue to remove any ash or debris. Melt your metal with mold near opening of furnace to warm mold back up. Pour your metal and allow to cure.
It even captured the detent ^
The purpose for expanding this research is to find out at what percentages work for each castable metal and if there's better methods.
I will be checking this daily to see if anyone is interested. Thank you.
