Building a Pregnant Oven

[f575gtc]

Hey everyone, I went to powder coat my wheels and was slapped in the face with my oven not being deep enough by about 1 inch and considering I don't powder coat very often, buying a new oven seems pointless.

I have been reading about build a pregnant oven and expanding the oven on the door

http://s67.photobucket.com/user/jbrady2/media/null_zpsb8aed3a9.jpg.html

I was planning on using 1 inch thick insulation board like this

http://www.homedepot.com/p/Super-TU...t-R-6-5-Insulating-Sheathing-268426/100322374

wrapping the inside in heavy duty aluminum foil on the inside and then tape up the sides with reflective tape.

The material is rated for 300 degrees, with the foil I should be able to squeeze out 400 degrees for 20 minutes.

I read about some builds for it online, and there are some "Use at your own risk" warnings for this setup, but I can't think of any other means of building a quick and inexpensive enclosure to give me those extra few inches I need for the wheels.

The other route is an expensive metal and fiberglass insulation build which I don't have the resources for.

 

[PugetDude]

The material is rated for 300 degrees, with the foil I should be able to squeeze out 400 degrees for 20 minutes.

Probably should have 911 and your insurance agent on speed dial before trying this.

 

[jask]

Tuff R is max 190F and the foil is not going to help that much. Roxul would be a temp appropriate insulation... grab some scrap sheetmetal off an old furnace at the dump or an HVAC shop... if you do use poly board please set up a video camera and let us know when you will be streaming the show.

 

[f575gtc]

What do you think of a 18-20ga metal box with ROXUL insulation around the outside and then something light like chicken wire or expanded metal to hold the insulation in place?

The insulation should keep all the major head away from the outside without needing to sandwich it between two full metal frames right?

Or for something cheap, can I line the inside of a card board box with fiberglass and use wire through the insulation to the box to hold everything in place, wondering of the insulation which has a 1000+ degree burn temperature will keep enough heat away from the cardboard.

I just need something for the insulation to keep its shape.

 

[chrisnazzy]

I only ask / suggest this for safety sake.....if you have already powdercoated the wheels can you possible call a local powdercoater and ask them if you can give them $20 bucks or something to just bake them in their oven for you. I know this takes some of the "DIY" or if it but it sounds exponentially safer.

Also I have wheels powdercoated often as I am in the tire/wheel business and we have been having a lot of fun providing this service to some of our customers. The right way to bake them is with a washer in the valve hole and hung on a rack by it with baling wire. I'm not sure it can be done right with the wheel laying on an oven rack.

Sent from my SPH-L720T using Tapatalk