Home Made Kiln?

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Greetings All,
        I recently came into possession of some box elder and honey locust. I  
have sawed them up into blanks, sealed the ends and stacked them for  
drying. However, being the impatient sort, I'd like to get to making some  
wood chips and strings. That being said, yes, I've turned some green bowls,  
but have not been totally satisfied at the end reult. SO, I've been think  
ing about building a home made kiln to dry the material before turning. I  
thought about using the SWMBO's oven, but she got very protective.... small  
minded I suppose.... never the less, it still intrigues me.  

Has any one built a home made kiln?  

Has anyone used a residential oven?

How long does it take to dry a chunk of wood?  

At what temperature?  

How did you accomplish this?  

Other than keeping the smoke dector and fire extinguisher nearby, any  
recommendations?  

Thanks in advance for your time and ideas.  

Karl

Re: Home Made Kiln?

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  The ones I've seen were based on a dysfunctional refrigerator, with  
the heat source merely a light bulb.  
http://www.woodturner.org/vbforum/showthread.php?t=1623
http://jkellydunn.com/studio.asp

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Personal e-mail is the n7bsn but at amsat.org
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Re: Home Made Kiln?

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How thick is it? Varies. THe variation with thickness is one reason that  
a typical procedure is to turn a bowl rough/green with walls about 10%  
of bowl diameter (ie, an inch thick for a 10" bowl), let it dry (much  
faster than the blank it came from would) and then finish turn (back to  
round, with thinner walls).  

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Most turners in a hurry buy the wife a new microwave and take the old  
one out to the shop. If you can find a working microwave at a tag sale  
and your wife does not yearn for a new one, that might be cheaper.

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If you need either of those, your dry wood will be so heavily  
checked/cracked as to be near useless, unless you are selling checks as  
a "feature".

http://www.jonathan-guest.co.uk/solar-kiln.htm

http://www.treesearch.fs.fed.us/pubs/5956

http://www.treesearch.fs.fed.us/pubs/5976

http://www.treesearch.fs.fed.us/pubs/5672

http://www.valuecreatedreview.com/kilnasc.htm

http://www.woodweb.com/knowledge_base/Homebuilt_solar_kiln.html

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Cats, coffee, chocolate...vices to live by

Re: Home Made Kiln?
Ecnerwal wrote:
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http://freecycle.org/

That's where I got mine. But, to be honest, now that I have been  
collecting wood for a while, I have plenty of wood that is fully dry.  
The microwave almost never sees use unless I have reason to suspect that  
a piece MIGHT be buggy.

Bill
--  
http://nmwoodworks.com/cube


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Re: Home Made Kiln?
Karl I built a Kiln for the very same reason, had a load of Free Wood to
Dry, details can be found on my Web Site in the Hints and Tips Section.

http://www.laymar-crafts.co.uk

RVS

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bowls,
small



Re: Home Made Kiln?
nntp-2.news.uk.tiscali.com:

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Wow, what a wonderful site to visit and learn. Thanks

Re: Home Made Kiln?
See:  http://www.fpl.fs.fed.us/ I know they have plans for a solar kiln. I have
 
wood dried in one built to their designs. I hope to build one, too. I've  
collected the glass...

Dan

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Re: Home Made Kiln?

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Sadly, no- I intend to, if I ever get myself out to a sawmill and buy
a big load of green lumber.

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In a word, no- that is too hot and too fast.

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Air dry, I believe the rule of thumb is 1 year per inch- with a solar
kiln, IIRC, the drying time is reduced to a month or two.

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Again, IIRC, the temperature is not that high- the plans I have seen
indicate that it needs to be warm, but not especially hot.  What
seemed to be critical was the stacking of the lumber or blanks, and
having a fan in the proper position to pull the humidity out of the
air, at least periodically.

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The plans I have seen are simplicity itself- a bit of leftover 2x4s, a
sheet of plastic, a pair of vent fans in the back, and a glass or
plexiglass roof at a 45* degree angle facing south with some plywood
sides, and you're in business.

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Make it outside, and don't let it get that hot!!! :)

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Here's a link to a number of plans for these- the one I had bookmarked
is down, but these should be fairly similar, if not identical to that
one.

http://www.allwoodwork.com/article/woodwork/solarkiln.htm

Re: Home Made Kiln?

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Depending on relative humidity, a turned piece will take a month or two at  
one inch to reach EMC.  Boards are a different matter.  Has to do with the  
distance and ease of moving water through end grain.

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There you go.  It's not the heat, it's the humidity.  Warm air can carry  
more water than cool, and the operator is interested in getting things down  
to the FSP quickly, so energy is applied.

While your regular bowl blanks and such are drying their couple of months,  
turn thin and let warp.  Lots of good fun there.  Lots less frustration too.  
Trying to develop a kiln schedule will certainly cost more wood than TDT  
(Turn,Dry,Turn) technology.  


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