After the above learnings I a planning to cast 4 more mouthpieces to practice more. I have printed and polyshed the models and I am preparing 4 different ways of attaching the piece to the sprue to compare how many wax channels are best and where to attach them.
Another new experience will be to use different material. I ordered some bronze pieces as seen in the picture. Bronze needs a much higher temperature to melt (996° celcius / 1825° fahrenheit) and therefore the process should be closer to the final silver casting process than my pewter experiments (see melting points table). Each of the bronce bars weighs a 100g and should be enough for 2 mouthpieces. The material was even cheaper than the pewter and might be the best metal to practice with. I guess I should build a complete prototype flute completely made of bronze.
And if I completely mess up and never make a complete flute, I will at least cast a bronze sculpture of someone. Maybe myself?
I have tries two different ways to get the metal into the mouthpiece. One channel from the sprue and two on opposite sides of the piece. I have no idea if that even makes a difference. I will see how they turn out and draw my conclusions. The first tree had channels on different heights and turned out pretty well but this time I find out if that is really necessary.
