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Posted by Steve Smith on March 7, 2007, 7:42 pm
Please log in for more thread options Do be sure to make your forge so stuff can stick all the way through it.
Obvious the first time you try to put a twist in the middle of a bar...
Steve
Steve Smith wrote:
> I've always used 2" blanket, one layer. If you can't buy it cut, you
> can always build and sell forges (I've sold maybe 15-20 of them).
> Great for tailgating--bring a couple of forges, sell them for $300 (if
> you do a really nice job) and you have pocket money to spend on
> everyone else's tailgate stuff.
>
> If you have to use the 1/4", I think you're going to need to put some
> kind of stiffener on it, maybe with some on an intermediate layer.
> Satanite is what I've used. You really want to use this on the
> innermost surface anyway to lock in any particulates. I think you'd
> have to cut each layer, rather than do it in one roll. Try it with a
> long piece of corrugated cardboard. I bet you can't get it tight
> enough in one piece.
>
> I'm not liking the donut idea. I suspect keeping them in place would
> be a long problem, and you'll have a lot more wasted material.
> Cutting them precisely would also not be any fun.
>
> Burner holes--again, I've only used a single layer of 2", 8
> pound/cubic foot density. What works really great is some kind of thin
> wall tubing the same outside diameter as your burner. Just twist it
> against the insulation until it cuts through. What works best for me
> is a length of thin wall PVC tubing. Don't get crazy making teeth on
> it; just the roughness left from cutting the tube with a hacksaw is
> plenty. I think if you used a hole cutter it would snag rather than cut.
>
> So far as I've read, they haven't found any specific lung problems
> with unused refractory ceramic fiber insulation. After it is fired, I
> think it can develop a small percentage of dangerous to breath stuff.
> New or used insulation, my habit is to work outdoors, with the wind at
> my back (if you have a respirator, it doesn't hurt). It is an easy
> enough installation to be careful without being a big hassle. 3M
> recommends washing your clothes when done (just so they don't sit
> around spewing particles indoors).
>
> If I have poured a fireclay floor, or used Satanite, I let it cure at
> room temp overnight, then I put an incandescent light bulb inside and
> brick up the ends (no energy saving fluorescents!), again overnight.
> Then I fire it for the first time outside to let any loose junk blow
> out somewhere other than in my shop.
>
> Steve
>
> theChas. wrote:
>
>> I will be constructing my first forge ever. I will use a 5 gallon
>> bucket,
>> and I see that Kaowool blankets are expensive considering the
>> shipping. If
>> I use 1 inch 8#, 2 feet x 25 feet long I would have much too excess
>> (3X?).
>> (I plan on having 3 inches insulation so my heating chamber is around
>> the
>> 350 cubic inch size. If I use the 1/4 inch 8# roll, it will work out
>> perfectly.
>> Is the 1/4 inch hard to handle and install? Is one smarter to cut it
>> into
>> lenghts that fit each circumference? Or should one install it in a
>> continuous roll and really be careful to keep it tight?
>> How about cutting 56 doughnuts (11.5" x 3"), (12 without the holes) and
>> installing it in that manner? Burner hole could be a bitch.
>> Any tricks, such a using a hole cutter ( running it backwards ), to
>> make
>> the burner hole ?
>> Sure will appreciate any advice, before I botch up the works.
>>
>>
>>
>>
>>
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