Floor insulation?

[fullbore1]

I am building my oven right now 4Wx6Tx6D and am planning on placing the elements (4) in the floor. The oven will sit on a concrete floor, is there a need for insulating under the elements in the floor? Also I was wondering if I could get away with a 3 inch wall thickness using 8lb mineral wool sheets?

I was looking at putting doors at both ends and running a hanging track through the oven to be able to get items ready to go in at one end and pull out the other, Any opinions on this set up?

Thanks in advance,
Michael P.

[Grumple]

Hi,
A concrete floor will act like a large heat sink and suck a lot of heat from your oven. It is recommended to have an insulated floor...
On the 3" mineral wool the more the better. I used 4" but put it in the 3 1/2" space on my build.
Don't know about the roll thru option except it will take more space to have room on both ends.
Grumple

[CarWiz]

Concrete absorbs moisture and releases it when heated. I would at least have a sheet of steel as the floor or find a heat resistant coating/covering. If your elements heat the concrete over the boiling point of water (~212), it may start popping chips all over the place. And if you've ever cut rebar out of concrete, you'll know what I mean by popping!

[ed_denu]

If you go over to some of the powder coat forums you will find a couple of people that have large(10x10x20) propane fired ovens that sit on concrete floors. I don't think it is that big of a problem.

[baz]

Ed is right . in fact most industrial ovens i have seen have a concrete floor
but if you are to have a concrete floor that you could use to roll in the parts why would you place your elements there

[fullbore1]

Baz, The frame is 1 1/2" on the bottom. I will cover it with a sheet of 22G but was wondering if I should mount the elements down in the frame work or insulate it and mount above. Because I am considering using the overhead track for moving parts, I was not thinking of using a flat floor and rolling racks. I have seen what happens to rolling racks over the years. This is more for doing my product line at KartRaiser.com than anything else, but extra income is always nice. I will also build a removable divider to cut the length in half. I know it makes the fan setup a pain but it should work OK.

Another thought is what is the best way to avoid Infrared heat transfer? will an 1/8" sheet of aluminum 1" over the element the job or do I need more spacing?

Thanks all.

[CarWiz]

This is more for doing my product line at KartRaiser.com than anything else, but extra income is always nice.

"Avoid back stress and possible lost time from work.
Take the dreaded part of the race day away!
Stop lifting those karts by hand!"

Great idea but the kart I used to race was about 1" off the ground. How do you get the kart on the lift but to lift it in place?

[baz]

Baz, The frame is 1 1/2" on the bottom. I will cover it with a sheet of 22G but was wondering if I should mount the elements down in the frame work or insulate it and mount above. Because I am considering using the overhead track for moving parts, I was not thinking of using a flat floor and rolling racks. I have seen what happens to rolling racks over the years. This is more for doing my product line at KartRaiser.com than anything else, but extra income is always nice. I will also build a removable divider to cut the length in half. I know it makes the fan setup a pain but it should work OK.

Another thought is what is the best way to avoid Infrared heat transfer? will an 1/8" sheet of aluminum 1" over the element the job or do I need more spacing?

Thanks all.

sorry i got it wrong . since you have a bottom frame anyway and if you have the spare room then i would insulate it .

the way my oven is built , elements are mounted on the back wall then i have a 16 gage sheetmetal 4 inches in front of the elements and of course you need ventilation to circulate the air in and out from behind that shield
works just like a convection oven .
that way all of my parts are cured from the hot air and not directly from the element itself

[fullbore1]

"Avoid back stress and possible lost time from work.
Take the dreaded part of the race day away!
Stop lifting those karts by hand!"

Great idea but the kart I used to race was about 1" off the ground. How do you get the kart on the lift but to lift it in place?

It picks it up on the rear bumper. I designed, and have been building them for going on 4 years now. KartRaiser video link

[recklessnova]

Thats cool