Power Coating Oven

I built 2 powder coating oven. One small one from an old stove, and a larger one made with metal studs and galvanized sheet metal.

Here is how I converted an old stove to a Powder Coating Oven. I had that stove now sitting for some time. First disassembly and cleaning, prep. for Paint.

I'm using engine enamel paint just to be on the safe side. The main parts will be red.

Door and the front section will be silver.

Adding a little bit of details just for fun.

Two of the heating plates, will be deleted, to keep it simple. Too many switches and wires.

Now I have only 2 connectors left for the heating plates

I tested the 2 elements which I left, and they all work.

No worries, it's not bent. Just the picture.

Now I got 2 holes with the heating plates removed. What can I do with the holes.

I had a nice piece of table top left over from the desk I had converted to a drawer only piece. This makes a nice cover when the oven is not in use.

After the first time I put some pieces in the oven, I noticed that the temperature control of the coating oven was really bad. I had to watch it all the time. So I did some enhancements. Added a PID digital controller, a better thermocouple, and Solid state relay.

Now the oven keeps the temperature within 2 Deg F.

I had to modify the back panel to make some space for the PID. I just cut out a piece of the panel, and riveted in another piece of galvaniced sheet metal.

This is how I wired the PID, Solid state Relay, and the on/off switch for the controller. I removed the original TC and disabled the baking switch, and kept the broil switch as on/off switch for the heating element. Please note that this is how I wired it, do your own wiring at your own risk.

Building the large Coating Oven.
My Powder Coating Oven worked great and I did a lot parts in there, however, the size is the limit. So I decided to build a new oven for the larger parts.

I'm using metal studs like the those are used for office building walls. This will be the bottom part.

I used 18 gauge sheet metal for the bottom side and reinforced the corners with the same material for the coasters.

I welded the nuts for the wheel mounting bolts at the inside, in case I have the remove the wheels.

Test fitting the framing pieces.

Insulation R13

Bottom parts is complete.

Completing all the panels

And Assembly of the box.

Door is mounted, looks like a big fridge, LOL

Next, the box for the controls  

PID and solid state relay, this is the same stuff I used for the small oven, works great.

This is why I have always some Ikea cutting board's in my material collection.

Connection block for tha powa

Here you go.

Got the thermocouple installed.

Wiring of the heating coils

And the heating coils installed.

The control box done and wired

Here a picture of the completed oven

I used the inner part of an old oven where I also got the coils from, and cut out the section for the rack. A few more details, but I tested and all is working. The wiring is basically the same as for the small oven,

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