The Shop > Metal Stuff
Square lil bertha
Will_D:
I am also think of a similar project.
Love the idea of the Tig shrouds!
One thing to think about is electrical safety. I will be using SSRs to switch the elements via a PId controler. As the furnace will have a lid, it will be simple enough to put a micro-switch or 2 in series with the 12v switching circuit for the SSRs, so that when the lid is removed the elements are automatically switched off.
Why 2 in series? - so that if one failed closed the other will still break the circuit!
shipto:
I agree foam would have been a lot better it would need securing well though and I was thinking about pinning it in will see how this works out once it has dried properly which I think is going to take a while.
Good luck Will the tig shrouds where a godsend and I may not have thought of them except I recently brought a arc,tig and cutting unit so had them in the shop.
shipto:
I have left it with about 2 kilo's of silica gel inside it in hope that it will dry it out a bit quicker. Also got the electrical connections sorted out forgot to take a pic of them in place but will do that tomorrow. The modellers clay is supposed to be baked at 130°C for 15 minutes so I need to borrow my mates paint stripper to try and do this.
Regarding electrical safety I too am planning to add a safety switch on the hinged lid to shut off the power when its open.
Manxmodder:
--- Quote from: shipto on April 20, 2016, 12:49:11 PM ---I agree foam would have been a lot better it would need securing well though and I was thinking about pinning it in will see how this works out once it has dried properly which I think is going to take a while.
Good luck Will the tig shrouds where a godsend and I may not have thought of them except I recently brought a arc,tig and cutting unit so had them in the shop.
--- End quote ---
Agree,the foam and burn out method sounds really good. Small dabs of adhesive from a hot melt glue gun would be a good way to fix the foam to the inner lining tube as the glue wouldn't be too difficult to separate from the liner. A liner made from thick cardboard and waxed on the outer face would be easy enough to remove as you could cut it lengthwise and collapse it inwards to remove
OZ.
Swarfing:
To stick the foam we used a bit of copydex adhesive using it like contact adhesive because it was to hand. the good thing about it was we just peeled it off before torching the foam out.
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