A bit of an odd question, hot rivets?

[SaltwaterServr]

A friend and I are building an prototype oven for a project not remotely related to powdercoating, but believe it or not this forum has been hugely helpful.

His father made a great little niche for himself in the banquet business in the Houston area by oven roasting whole pigs, deer, goat, small steers etc. and then rolling them out and carving the meat right off to the plates. Basically, its the same set up, size, and use of trolley carts that y'all use here, only all stainless.

Jay's father unfortunately lost all of his oven equipment when Ike tore across the Galveston area. Jay and I got the idea we'll build him a set of new ones and save him the time and effort of doing it himself since a commercially bought one is obscenely expensive.

We've run into a snag. The rivets we used to join the studs to the outside are getting really hot. Too hot to touch. We know this wasn't a problem in the ones he built for himself, so we need to fix this.

Does anyone have ideas on what we might have missed or could do that will prevent the studs from carrying the heat to the rivets to the outside? I'd tear my home oven apart to see how that suspends the oven inside the shell, but I'm afraid my girlfriend would go Loreena Bobbit if I so much as scratch it.

[SCOTTRODS]

A friend and I are building an prototype oven for a project not remotely related to powdercoating, but believe it or not this forum has been hugely helpful.

His father made a great little niche for himself in the banquet business in the Houston area by oven roasting whole pigs, deer, goat, small steers etc. and then rolling them out and carving the meat right off to the plates. Basically, its the same set up, size, and use of trolley carts that y'all use here, only all stainless.

Jay's father unfortunately lost all of his oven equipment when Ike tore across the Galveston area. Jay and I got the idea we'll build him a set of new ones and save him the time and effort of doing it himself since a commercially bought one is obscenely expensive.

We've run into a snag. The rivets we used to join the studs to the outside are getting really hot. Too hot to touch. We know this wasn't a problem in the ones he built for himself, so we need to fix this.

Does anyone have ideas on what we might have missed or could do that will prevent the studs from carrying the heat to the rivets to the outside? I'd tear my home oven apart to see how that suspends the oven inside the shell, but I'm afraid my girlfriend would go Loreena Bobbit if I so much as scratch it.

Simply put..... phenolic washers.

You'll need 3 washers out of a thermal insulator material. Make the holes big enough to put one smaller one in the hole ate the same plane as the inner sheetmetal stud. put 1 larger one on the outside and the inside, making a little sandwichwith the sheetmetal between. You will need steel washers on the outsides for strength and to avoid crushing the phenolic, or whatever you use for insulators. Doing this only on the outside sheeting will isolate the rivets from the inner metal, physically. There are probably some pricey specialized washer systems that do the same thing. There may be little or no difference once you calculate the amount of insulating washers, and compare them to spacialty hardware/insulators. Believe it or not, you may find something very useful at your local hardware store.

[SaltwaterServr]

Appreciate it. We had considered pushing the rivets through a padding of fiberglass into the hole somehow, but I think this helped us find a solution.

Looks like our next test will be using a phenolic washer backing with a larger diameter hole through the stud. Hopefully there will be enough reduced contact for the temp to not be blazing hot on the rivet heads. If that doesn't put carts to horses, I think we'll look at tracking down some phenolic shoulder washers which I cannot seem to find online anywhere so far.

[240sxguy]

Have you checked with www.mcmaster.com for your washers?

Evan

[SaltwaterServr]

Have you checked with McMaster-Carr for your washers?

Evan

Now I have!

I don't know why, of all sites, I didn't search their's. I qualify today as an:



It's much appreciated.

[240sxguy]

Well, after mooching advice on polishing I am glad I could offer something! lol