Need advice on insulating a curing oven

Hankins

Hankins

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Dec 7, 2008
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Need advice on insulating a curing oven...
Stopped by Hd today and picked up a smoker with the plans of turning it into a curing oven for Cerakoted blades.
Will be using an adjustable Hot plate as a heat source and the Smoker is new so no cross contamination of materials.
Got it all set up with 12" metal liner inside leaving approx 2" to be insulated to the outer shell.
Koawool or Ceramic blanket is rated at 2300F and this only needs to be up to 300deg F.
Ceramic blanket also will cost around $70 plus shipping for the 14sq' needed.

Suggestions? What is used to line a kitchen oven?
What are my alternatives here rather than overkill?
 
I've still not gotten around to building it yet, but I got some mineral fiber slab for insulating the tempering oven that's on my to-do list. The dense, rigid stuff I have is good to a hot-face temperature of 675 degC (1247 degF), but if you only need 300 degF, you are probably getting into domestic roof insulation territory.

I'm over the pond, so not familiar with the popular brand names over there, but I'd expect an insulation product that'll do the job to be available at HomeDepot or similar. I think most of the attic insulation products there are glassfiber, rather than mineral fiber, but I wouldn't imagine that's a problem unless there's a binder used in the manufacture; it might take some reading-up on a manufacturers website once you've found a likely product.
 
Probably fiberglass insulation with no backing. Hold that in place with wire. You could even use some wire fencing.
 
Hankins

They make fiberglass insulation panels, some with a foil backing on one site. The commercial guys use them to insulate duct work with. All of them I've seen are aboiut two feet spuare and two inches thick. Your local sheetmetal shop should be able to steer you to where to get them if you are interested. McMaster Carr carries something similar. Here is a link if you are interested.

http://www.mcmaster.com/#fiberglass-boards/=jf82rg

Jim Arbuckle
 
I built a curing oven a few years ago and used no backing fiber from Lowes. My next oven will get Roxul Stone Wool Insulation as it is a more robust insulation for heat. Plus I am going to build a roll in that will have 4 or 5 elements capable of getting up over 600 degrees.

Just remember to over build....pay once and hurt once. I out grew my 4x4x6 very fast. I will keep my oven I have now and just build a bigger one. With proper racking I can cure hundreds of blades and lines at once and the cost to run it will be less then the larger one I am going to build.
 
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