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I Forge Iron

Rainbows

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About Rainbows

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  1. Confused as to why, its just a forge with a hole in the front and back to make the 7:1 output input ratio (think that was from anvilfire) + some doors. The outside is square cause I don't have rolling equipment but the inside will be semi circle/ellipse. Seems like same sort as forge as others have? Thanks for the tip on the tapered jet. I guess in real life there would be some taper just from the end of the drill bit but I will see about grinding a D reamer to make a fine taper or check if I have any tiny boring bars. Bit confused on the ventrui part. Doesn't the tube cou
  2. So here is my theorised burner. to the left is 8mm tube to take a compression fitting leading to a 1.1mm tip and a threaded plate that will run up and down for air adjustments. Then a venturi going from 40-21.4mm (this halves the area) with a 12-1 taper or a 24:1 maybe depending how you look at it. Then a 25.4 OD, 21.4 ID 170mm long tube. Then the flare is made as amal does so the internal diameter and length is 42.8mm. Does this look like it would theoretically work? I wasn't sure where to put the jet in relation to the venturi. Other designs looked to have
  3. Its over a year on but I thought I would come back to say that over time I have had to use smokeless a few times cause I ran out of other sources. Avoid it if you can. One brand would rapidly disintegrate and all the tiny yellow glowing blobs of coal suddenly fly at you. I think that the binder that kept the nugget together stopped working once it got to a certain temperature. Fine for a house fire, not so much for forges with higher temperatures. Another brand just did not get as hot but thankfully it avoided trying to explode on me like the other brand.
  4. In their defense if you only plan to melt aluminium in one off melts that home made refractory holds up fairly welll. I once melted iron in a coal forge and the steel crucible wasn't even glowing by the time the aluminium was melted. The backyardmetalcasting guy used the oil burner later to try and melt iron, which he did but his final comment was to get proper refractory. Final design will get a steel stand and be used outside so shouldn't have any problems with fire.
  5. Why does it keep eating my replies aaahhhh Edit: Woops I can't blame you for not being able to find it, managed to misspel it. Ursutz rather than Urutsz Here are some examples http://www.abymc.com/Articles/Gallery/Peter_OddDuck.html http://www.backyardmetalcasting.com/oilburners02.html http://www.instructables.com/id/Waste-Oil-Furnace-For-Melting-Metal/ http://www.oupower.com/index.php?dir=_My_Projects/_Shop_Projects/WVO%20Ursutz%20Burner Now this guy managed to get himself banned off here a while ago. He also got banned from a hobby casting forum
  6. No idea where to get ITC 100 in the UK. However zirconium silicate was much easier to find. Also recently discovered my local builders merchant does firebrick, however they only do the dense kind, no insulating brick. Would reduce cost of shipping compared to posting castable refractory but not seen any existing furnaces use it.
  7. The wool from my planned supplier is rated for 1300C (2372f). The refractory is 1700C or 1600C (3092 or 2912F) but doesn't mention Zirconia. 1" appears to be the standard that people using oil burners for foundry furnaces seem to use. Might just follow their footsteps. Also the original design was based off pictures of a Devil Forge forge. Thats why I thought a square box would be a good idea.
  8. I had to google the ribbon burner, I see the resmebelance. The burner is actually based off the urutsz burner and is designed to burn oil (vegetable,motor, diesel or other). However the use of refractory in gas and oil forges seems similar and since the oil section is pretty dead looking I thought I would ask in the much more active gas section. The oil burns in the chamber above the refractory grill and the flame is pushed down into the forge. I was going to use tapered steel pins to create the holes in the refractory but after getting a PDF written by Emmerling I much prefer his wa
  9. So heres the furnace I plan to build Steel body, ceramic wool insulation (50mm of) and surrounding the interior 1600C dense castable refractory (I don't think the £3 upgrade to 1700C is necesarry?). For scale the pipe at the top is 2" and the interior will be 100x230x550mm. These are the parts that need to be made of refractory. Having two flanges on the middle one seems difficult though. If I split the middle one into two parts to be cast does anyone know if there is a way to join the two pieces together? Also the refractory is 12
  10. I have done some amount of small aluminium castings using a welded steel ladle in my forge and recently was able to buy for next to no money a small lot of commercial foundry tools. Graphite crucibles, pouring shanks and steel flasks. Also got a lid off a crucible furnace. Apparently the rest of it had been destroyed in a transporting accident but the lid is in good condition. The two significant things about this is that I now have crucibles that can take cast iron temperatures and the pouring shanks aren't built to be used on a forge but a furnace that sits on the ground. So to use them
  11. Saw one painted red and with a few more fingers. Search ebay for "Vintage Steel Chain and Roller Detcher" Which would back up Matto with changing conveyor belts
  12. Assume the insulation on the cord to the light gets frayed or otherwise damaged. The wire within gets to touch the metal of the fixture making the entire thing live. If the fixture is connected to earth then there will be a massive current surge, the fuse blows and the user has to replace the cord. If there isn't a earth then the metal waits around for something to ground it which could include someone touching the fixture in which case the mains current passes through them to ground and then the fuse melts after they are nice and toasty.
  13. Forgive the sideways picture but this could give you an idea for a treadle hammer. Anything where you pull an arm down to make a hammer rotate around a pivot will do.
  14. The colour makes me think it is made by Vaughans though they haven't trademarked the colour si I couldn't be sure.
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