aluminium stamping advantages over aluminium die-casting
the price and leadtime of the tooling. stamping is usually 5 to 6 times lower than die-casting. the unit price of a stamped part is usually lower also
I use them for ‘cold casting’ effects, but coming to Perth I’ve been unable to find it in craft stores and it is expensive to ship from the East.
I’m south of the river. Most craft & hobby stores have metallic paints, but not powders. There are a couple of online stores interstate, but they charge more in postage than the cost of the powders. 
Where is Perth? If you can’t find them at your local hobby shops, you might try online.
Bauxite is the ore if aluminium (it’s main chemical).
Bauxite is mined in many places if the world. It is extracted by open cast mining. It is purified close to where it is mined and then transported around the world to a place where aluminium is extracted.
This is due to two reasons. Firstly bauxite has large amounts of unwanted material in it which makes it very costly to transport in an unpurified state due to the additional weight. Secondly the extraction of aluminium from the ore requires very large quantities of electrical power which is not available at the mining sites and so the ore has to be taken to the power not the power to the ore site which would be far too costly to do.
Yes. It has strong effect on Aluminium.
Check out my website: http://www.budgiemetalworks.ca
This is the first casting in my homemade aluminum foundry. Approximately 5 lbs of aluminum was poured here which took about 2 hours to melt. The furnace draws 20A on 220VAC.
It was built from plans bought at http://www.dansworkshop.com/
The element was custom made for me at a pottery kiln shop, the body of the furnace is made from firebricks and commercial refractory. The tools for handling the crucible were made by myself. The amperage controller is sitting on the pink foam on the floor, I’ll be enclosing it properly but wanted to try it out first. The crucible was bought from Canadian Thermix, a really nice company to work with. The final furnace took about 6 months to complete, working on it every couple weekends, and I expect to get a lot of use from it.
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It will blacken with use…Funny, most people wonder how to get the black off!???
Have BMW used a cheap source to manufacture their alloy wheels,
Live and learn
cheap aluminium can have air pockets when cast into a shape.
The problem is that the cracks go across the rims, this must be Dangerous,
You can say that again; somebody messed up big time….!!
DON’T TRY THIS AT HOME!!! The hair dryer was enough to heat aluminum cans but not aluminum rods. I switched to an air compressor to push more air in and it definitely did the trick. Even though I was wearing safety glasses, a hot ember managed to get under them and burn off three of my eye lashes.
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Have some old cast aluminium garden furniture, paint peeling off, white powdery ’salts’ underneath. Some of the paint scrapes easily and other places seem well stuck. Do I need to remove it all? How shall I treat the ’salts’. With acid? What is the best type of paint to use for repainting.
Thanks.
Not sure if this would be the same but I painted my aluminum siding. I used a detergent called "TSP". It comes in powder or liquid form. With previously painted aluminum you need to get the gloss and chalking substance off. The powder form needs to be mixed with water. Just spray it on and let is sit for a few minutes. After that just wash off. In your case make sure you get all of the old paint off. I would use sand paper to rough up the aluminum. After that it should be acid etched. This will help the paint stick. Use a epoxy based primer. After that I would just use a outdoor spray paint. I just found a link on how to repaint aluminum……
http://www.polyfiber.com/techquestions/surfaces/aluminumsurfaces.htm#What%20about%20repainting%20old%20aluminum%20surfaces?
Good Luck!
A green sand mold is filled with molten aluminum.