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Everything posted by bigb

  1. Some food for thought, in the Forges 101 sticky post #6 Mikey talks about a moveable barrier to allow exhaust gasses to rise out and up while the barrier, with it's reflective coating, reflects radiant heat back into the forge to help avoid a cold spot. I have an idea to cut only a very small viewing hole in the doors, then control the exhaust by leaving them ajar. I believe this will create what Mikey is talking about. What do you guys think?
  2. How much of an opening do you find you need to keep it running smoothly? I am working on my doors and I know I'll never be able to close them all the way due to exhaust needs and I am planning to cut a small hole to act as exhaust relief and for viewing as well. I realize this can be quite variable but looking for a starting point. My forge has a 3/4" Z burner and is between 325 and 350 cubic inches. Would a 2 or 3 square inch opening be sufficient? I can start small and increase if necessary. My design uses hinges instead of sliders. It is nearly finished and I will post pics tomorrow.
  3. Thanks for the good replies, Frosty I thought of that last night after I posted and that is exactly what I'll do, take the doors off and do some trial runs with stacked fire brick. I decided to give the hinged doors a try since I didn't want to be fumbling around with sliding bricks and stacking bricks. If this works I think it will be faster and easier. If it doesn't work then I'll get out the grinder and do something different. I did a lot of Googling and didn't find anything like this so I said why not give it a try?
  4. If your lining blanket is anything like mine was it actually finished out at 2.5" after putting in two 1" layers. That brings you down to 380. Then what about the floor? I ended up flattening the bottom for a flat floor. My dimensions were similar to yours but I ended up at roughly 325 cubic inches. I included a layer of refractory cement over my blanket. My cubic inches were going to end up too small and I ended up peeling some of the blanket out then packing the castable in tight so I would have enough space.
  5. I picked this out of the job site dumpster today, 12X12 and 36" tall. Thinking of using it for my post vise. I can make a base for it, I have several circles of heavy plate. I have a lot of 2" X 1/8" lengths I can use for strapping to stop the splitting and all kinds of angle up to 4X4X1/4" to mount it to the plate.
  6. Thomas that was me, I am planning to cut a small notch out of each brick on my forge doors, see drawing
  7. Can you tell me how the fire brick doors are holding up? I have the same plan for mine, hope to get it finished this coming Sat. My plan is to cut a notch out of each brick so when closed there will still be a small opening for viewing and exhaust. I may attempt to hinge the bricks to avoid having to fight with hot, sliding bricks. Need to have somewhere for the exhaust to exit so can't close the bricks all the way anyway can you?
  8. So do you make a regular split cross first then twist each arm 180 degrees in the same direction?
  9. My Kast-O-Lite is presently curing and I will be starting my doors soon. I am going with 2 soft fire bricks that will slide on angle iron rails. One thing I am considering is to cut a notch into each fire brick so when the doors are closed I will still have an opening for exhaust and a viewing hole. Not sure if this would make the bricks break though. I could accomplish the same thing by just not closing them all the way and having a vertical slot instead.
  10. Subscribing because I was wondering the same thing. I am planning loose fitting fire brick doors with channel tracks but I don't forsee them ever being closed all the way.
  11. I am just going to use soft fire bricks that slide on metal channel for the front and the back is an NC Tool cast iron door.
  12. I punched the hole at 2:00 but I didn't take into account the reduced size after the liner is in. The cardboard represents the liner dimensions. Will this work or should I punch another hole a bit higher? (I punched one on top too so I can experiment with different burner locations, plugging the unused port with wool)
  13. In your post of Dec 24, first picture, can you explain why the refractory for the floor has plastic wrap under it?
  14. The only thing I can say is the fire pot might be a tad deep. Mine was too deep and I found myself pointing my work pieces downward to get into the heat, and it was hard to heat the middle of longer pieces that way. I raised my fire ball and it helped a lot. Mind you I am far from an expert just sayin what my experience was.
  15. All put together and lined with Kaowool. One thing I noticed is that two 1" layers of blanket actually measure 2.5" which will reduce my cubic inches unless I either compress it or go with a thinner layer of Kast-O-Lite instead of 1/2". Will compressing the blanket reduce the insulating properties like it does building insulation?
  16. It'll be easy to raise with some 1.5 X 2" angle I have a ton of. Already popped the bottom off and cut the angle. Had to stop to take the wife out to dinner for NYE. Will tack it all up tomorrow and hopefully get it lined and photographed. I might cut some triangular strips of blanket to help round out the corners before appyling the Kast-O-Lite, and make up a joint tool, or maybe just use a spoon. Thanks for all your help and Happy New Year!
  17. I did think about that sharp corner and I am considering rounding it out with Kast-O-Lite. Of course that will furthur reduce my cu in. As it stands I am only at 140 cu in, Every inch of height I add will add about 90 cu in so I am thinking 1 or 1.5" of additional height and filling in those corners.
  18. Frosty, Do you think I will lose a lot of heat if I reduce the floor to 1" ceramic wool and 1/2" of Kast-O-Lite instead of my planned 2" of wool?
  19. Yes I noticed it looks smaller than I had envisioned. It's a 3/4" Z burner. I can make the chamber slightly larger if I reduce the refractory on top down to 1/4" instead of 1/2", I can also drop the floor 1" by using only one layer of wool. I can also extend the bottom enough to use 2" of wool and still gain 1". Presently my cubic inches will be under 200.
  20. I guess everyone is away for the holidays? I decided to punch in slightly higher, about 1/2 way between where it is now and the next red mark.
  21. I remember years ago there was an extreme cold spell in Jackson Hole and my BIL was in the HVAC business. They bought up all the electric blankets in town to put over people's outdoor propane tanks so they could have heat.
  22. Here ya go
  23. Modern post tensioning cables are contained in a plastic liner which also contains a lubricant but I wonder if those are part of an old post tension system before plastic liners were used.
  24. Do you have a stand where you can lay the torch in and hold the work piece in the flame? I need something like that. I did recently get a gas saver which helps a lot, I can just hang the torch on it and it will estinguish, than pick it back up and wave it in front of the pilot. I'd still like to make a stand to hold it while lit.
  25. I really like that, what did you use for the feet at the end of the rebar legs? I made some trunk stands out of rebar and sliced up some 1" machinery pins for the feet. That was before I had a forge, I wonder how well it would work to upset the rebar to make feet?