Non-ferrous metal casting in sand
Today let's talk about casting non-ferrous metals in the sand. In one of the previous articles, I talked about the blacksmith, the temperature of which is enough to melt non-ferrous metals. I melted aluminum. As an example, I will present a small statuette for the uncle’s wedding anniversary.Now insert buttons into the sticks,but not fully.Next, stretch the nichrome and tie the wires. And we stick the buttons completely. I attached a USB cable to the wires. Now insert the USB into the charger from your phone. The wire is hot and less often foam is like butter!Now cut out the desired shapes and with the help of PVA, or, like me, melting glue them together as needed.We also cut the gates and also paste them.
FormFirst, decide what you want to cast. As I said, I will pour the statuette. You need to make a foam form. I use plain white foam, but I advise you to find penoplex, and both are sold in hardware stores.
Nichrome cutterBut to cut such a foam with an ordinary knife is almost impossible. Let's make a small simplest nichrome cutter for foam plastic.You will need:
- Nichrome wire.
- Two sticks for sushi.
- Two clerical pins.
- Two wires.
A few words about the crucibleMetal needs something to be melted. This is something called a crucible. I made it from a pipe. From a steel pipe with a diameter of 90 mm and walls of 2 mm I sawed off 40 mm. This height will be the crucible. A steel pancake was welded to the bottom. The handle from the steel corner is welded to the side, but it’s better not to take this handle with your bare hands.A triangular notch is made on the side and the nose is welded from a steel triangle bent in the middle.
CastingNext, insert the foam mold into the sand so that the tops of the sprues stick out of the sand. Around the sprues need to make small craters of wet sand. But I did not really like this option. Instead of wet sand, I used large nuts. Now we throw aluminum cans, or any aluminum you have in the crucible, melt the forge and melt. Top will accumulate various slag (paint on banks, dust, etc.). If possible, it should be removed.
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