The Shop > Metal Stuff
Oil fired crucible furnace
NeoTech:
Pottery wheel is easy to make.. but learning to do pottery.. is not easy. ;)
But basicly a pottery wheel has a aluminium cast small disc mounted on a rod supported by a upper and lower bearing the lower wheel can be kick wheel or put a motor there.. The kickwheel is actually simpler to use and can be motorised by a long rope more or less..
I think that mix he uses there with borosilicate glass, and graphite is for alot higher temperatures then he is doing in the end of the video.. which feels more like a "look it works" kinda thing.
vtsteam:
I have a crucible making thread already, so let's move there....
Oooops, it's actually about ladles, but I'll continue there.
vtsteam:
I decided to make a new pattern, somewhat larger, that incorporated another part I needed. Also this allowed me to reverse the draft so I could place a riser on the non-channeled side.
I decided to go with my latest method of melting (specific to my particular furnace and furnace lining) of using a low throttle to ramp the furnace and crucible up to red heat before adding iron. I then added 4 pounds of metal -- I needed 12 lbs for this pour, and planned two more additions. This was my largest melt -- the last had been 9 pounds. I also gave it full blast, but just slightly leaner flame than I had been using. Still very slightly rich.
I didn't bother timing the initial heat, but timed from the first addition of metal. It melted the first 4 pounds in 20 minutes, the second 4 pounds in 17 minutes, And the last in 15 minutes. I gave it 15 minutes of extra heat to make sure, and the poker test verified it was hot metal.
This is how my own furnace seems to work best.
I got a perfect pour. No flaws. Absolutely clean. I think I now understand my furnace, my metal, my sand, my particular pattern making requirements, and my own molding requirements. And I think I can extend that to future castings. It's been a long road for me, but each time it didn't work there was an improvement of some sort or a realization. I had to see what didn't work, and learn what worked best with what I specifically have. I think I know that now. Thanks to the many who were supportive, and I'm sure I will learn a lot more as I continue to cast IRON!
I'm psyched!!!! :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :nrocks:
Pete W.:
Hi there, VT,
Tenacity tells! :clap: :clap: :clap: :clap: :clap: :clap:
You must be very pleased, and so you should be. Well done.
awemawson:
Excellent Steve. Get you teeth into the ankle of a problem and hang on in there until it gives in :thumbup: :thumbup: :thumbup: :thumbup:
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