Enter in the estimated total wattage of however many heating elements you will be using5. These come with two 40A relays, capable of handling two elements each. Is there a PDF version of the article for download and printing? I do not have any finished pictures to post but there are pictures in "How to Build a Powder Coating Oven Part II" that show the top nearly completed. The other issue is the very relaxed way that household ovens control the elements. When the elements heat up dose it not get in between the walls and heat up outside of oven? If we make that inner thing a 2 inch thick thing, we are now insulating a (nominally) 6 inch space. I had a question about insulation. im in the process of making a bigger oven, i really like this build, im wondering if i could go a foot deeper and a foot wider and leaving everything as is in the build, since you mentioned its got more fire then needed with the 4 2000 watt elements. I am a carpenter, so the how to was easy to follow. We provide commercial and residential services specializing in powder coated ovens. Also the thinner your sheet metal used to build, the faster it will heat up. I am alittle confused on a couple things. If you were to use 3000 Watt heating elements, you would need between 8 and 12 of them. This oven is built and tuned in house ready to to be piped in and tuned by your mechanical contractor. Vertical vs horizontal? Also was wondering if i could use the aluminum tape to line the inside or outside of the duct to insure a proper seal. There are some ceramic coatings that cure at a higher temp than powder coat so I will give your recommendations based on an oven that cures at 500 degrees. Our 8' x 8' x 12' gas fired curing ovens meet all requirements to make them a Class A oven. Building a lot smaller oven (3x3x3) and dont really need the much cfm and not really 100% sure Its needed. Was kind of wondering about the tape because you say to be sure to use steel rivets and not aluminum. This oven is built and tuned in house ready to to be piped in and tuned by your mechanical contractor. i don't know that the adhesive on the aluminum tape would hold up to 400-500 degree heat, Excellent build. A 1/4" or #8 drill bit will be sufficient for these holes. These ovens arrive at your facility set up, tuned and ready to cook once the gas is ran and power is wired in by a licensed contractor. all i can find is the stud with a lip on the inside edge that either needs to be bent or cut to work. Or you can do a propane fired oven. I mounted and insulated the blower but I feel it is getting too hot. The temperature probe is built into the inside wall of the oven to prevent damage. Sean, Thanks for this awesome write up. These ovens arrive at your facility set up, tuned and ready to cook once the gas is ran and power is wired in by a licensed contractor. I am only powder coating for my self. You can contact him to find out for sure: http://www.tedsfabrication.com/tedsfabs/Same situation with the Fab Shop: http://www.powdercoatovens.com/products.php. this will maximize heat distribution and reduce hot layering.another point is that the elements should not be in direct view of the parts being heated as the infrared heating of the items will have a hot spot. You don't want the inside of your oven to be like a wind tunnel, just slightly moving air is all that is needed to regulate the temps. i would like to know a rough estimat eon materials if possible thanks in advance . I am thinking of doing this with a sea container. In use, there is a difference, and any fractional savings in making an oven will become apparent.XWhat is commonly the largest barrier to heat transfer, is the presence of interfaces. Thanks again for the help! Also how big are the squares that you made for the elements in the frame? Thinking since is it on the floor and will have insulation all around it should not cause an issue. i read somewhere about having something over the oven element to protect the powder coating parts from direct exposure it that right ? Will a fan even be needed since the burner will provide air flow? I was wondering the same thing. Thanks for reading! also don't have a powder coating company in my town.. We build our gas ovens with the user in mind as a quality, professional and cost effective addition to your curing process. Most people just opt for an oven due to the cost and complexity of the infrared lamps. We have the frame up and the inside skinned. The temperature probe is built into the inside wall of the oven to prevent damage. It is the "6-inch Duct Cap without crimp" mentioned above with a hole cut in the middle of it using a hole-saw. Copper wire isn't cheap. I want to build a 8'lenth 5'wide and 8' high oven for ceramic coating what would you recommend sheet metal size, insulation and heaters, Does process change from how you described it and can I weld inside, in all the corners. Do you happen to know what type of sheet metal they used on your oven? NC For the best experience on our site, be sure to turn on Javascript in your browser. The temperature probe is built into the inside wall of the oven to prevent damage. I have never heard of anyone having issues with fiberglass insulation in a powder coating oven build. I NOW THANK YOU VERY MUCH FOR PUTTING THE TIME IN AND GIVEING US ALL THIS INFORMAITION.I AM BUILDING A 4x8x8 HEAT BOOTH USING THIS INFORMAITON. Hey also I've been calling around to acquire some sheet metal and they are all telling me that 20 gauge sheet metal won't work for this type of application because of the heat. Thank you for taking the time to put this together. Mount porcelain light fixture to 6" duct cap using provided hardware. A shaft mounted fan would sit inside the oven and the shaft would extend through the top of the oven to the exterior. Our 4' x 4' x 8' gas fired curing ovens meet all requirements to make them a Class A oven. 67 west Lakewood Dr.
I did get a little lost inthe blower/ducting section and I think a pic or two taken at a distance would have made it easier for me.I realy enjoyed the guide and feel like I could go buuild one easily from it. The blower sucks in the air from the top of the oven and it channels it into the V shape, then there is a 90 degree bend from the V to the wall stack ducts running down the side of the oven and then it exits into the bottom of the oven in the interior. I was thinking of making a steel frame for the oven to sit on so it's not in direct contact with the floors. thank-you this is very helpful and i plan to start buying materials. We will start with the framing. What do you estimate the total cost of the finished oven will be? Our 6' x 6' x 12' gas fired curing ovens meet all requirements to make them a Class A oven. Hi I'm looking at building an oven 3x7x25 so approx 500 sq ftIm in australia and my maximum power supply is 60amps at 240 volts so 14400 Watts Outside temperature ranges from 60 to110Is it possible to heat an oven this large with this amount of powerThanks. Unfortunately, a PID will not solve this. Hey Danny, You ever get an answer to this question. Some notes and suggestions after building these. We can build kits of any size. The shaft would need to ride on a set of bearings. So my real concern is the plywood floors. You wouldn't have to add all of those extra boxes on the outside and it would look more flowy (if you know what I mean). Just something to provide an air gap underneath. The heat from the lamp has to be contained in some way around the part so the part should still be in some type of insulated box while using an infrared lamp. Hope that helps. The other choice would be to use water heater elements around 1500 watts at 240 volts. Thanks, Part 2 is posted. Would it be beneficial to stager the 4 heating elements up the back wall for even distributing of heat, Do you have these measurements backwards. This is my Go2 reference. Hi Sean, is the size of the oven 3.4'x3.4'6.5' inside diameter or outside diameter? awesome gude by the way looking forward to do mines soon ! This oven is built and tuned in house ready to to be piped in and tuned by your mechanical contractor. My thought initially was air leaks from the heat chamber, but sealing all the edges w/ RVT only slightly improved things. If you have trouble with it, just give me the parameters listed below and I'll let you know the results. I have heard some issues of this causing the heating elements to overheat causing them to stop working prematurely. For the longest life, the best option would be a belt driven fan that is driven by an external motor. There are a couple of companies producing aerogel products for housing. These elements used above draw more amps then I have available. This size also Comes with dual circulation fans to ensure exceptional heat circulation. Thanks in advance. If you google, at what temperature does galvanized steel start to become toxic it will say 390 degrees. Can I have 2 upper elements and 2 lower ? You are right, the 25 gauge is very thin, but it is what the builder of this oven did use, and you'll notice that he doubled them up almost everywhere which greatly improves the strength. i have a question as to how much is the cost of this oven. These will allow you to rivet stacks of metal with a minimum thickness of .13" and a maximum thickness of .125". We also have prefabricated kits for beginners., Our booths are always tube builds that are welded. I'm glad you found it helpful. I plan on ordering the element you sent the link on. For an oven this size, it takes ~8000 watts worth of heating elements to get it up to temp in a reasonable amount of time. You end up paying for full sheets of galvanized if you build one this size anyway. Great article! I should have it finished by Thursday of Friday. Shouldn't it be at like room temp 60ish? I JUST ORDERED ALL OF THE PARTS THREE DAYS AGO AND MOST HAVE ARRIVED.I NOW AM GOING TO USE THE BOTTH FOR POWDER COAT, FORMING PLASTICS AND CURING FIRBERGLASS PARTS WE MAKE AND REPAIR.AGAIN THANK YOU FOR ALL OF THE LINKS WHICH SAVED ME MANY HOURS.IN A WORLD WERE BUSINESS IS GETTING HARDER, IT IS NICE TO SEE PEOPLE WORKING TOGETHER. hi ! 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I used your build as a model when building my oven to include the convection feature and the oven light detail. The temperature probe is built into the inside wall of the oven to prevent damage. One more question: Is the oven explicitly vented so that there's no pressure build up as it heats up? 4"thick, 8pcf mineral wool insulation. Wheel the rack over to the oven and slide the rack off of the rolling base into the oven. Hope that helps. By the Blu calculator I only need 5 3000w elements. All Rights Reserved. I'm looking forward to the next installment. I may be wrong, but that is how the infrared curing lights work. It would be best if the heating element connections where not in contact with the insulation. This fan also enables the oven to reach temp faster by way of heat distribution. i cant seem to understand how these interlock with each other. One produces a product which is nominally 1/5 inches wide. I'm not going to be using the oven for powder coating. For sheet metal, I would use 18-20 gauge and 16 gauge on the floor. could you go a little more in depth on the wiring? Don't want to cause a fire lol? We build our gas ovens with the user in mind as a quality, professional and cost effective addition to your curing process. This would equate to either 7500 watts (pulling at least 31.25 A), or 9000 watts (pulling 37.5 A). I WAS ORIGINAL LOOKING FOR A HEAT SYSTEM TO FORM PLEXIGLASS. Copy and paste this link into your browser to see a picture of the 90 degree duct. I almost started this amazing build, but then I found out that galvanized steel becomes extremely toxic when heated to near 400F (zinc fumes) Looks like I'll have to find an alternative (maybe Aluminium) Great job. Hi, would A top mounted fan still be the best location if I use a propane burner in the bottom instead of electric elements? The oven in this build with all of the bells and whistles ended up costing the builder $1,400 USD. Arrange for spark to cross between 2 conductors in that panel. Could you use the expanding firebreak spray insulation in this? The countersunk pull themselves flat nicely to prevent high spots between the studs and sheet metal. I've looked at Lowe's and Home Depot and didn't see the full length galvenized sheet metal, only 12" x 24". Part II is coming next week. Thanks for the double glass idea! Dear Sean, thanks a lot for the great instruction. (I realize the original post was 2019 but I hope this will help someone in the future). The temperature probe is built into the inside wall of the oven to prevent damage. We build our gas ovens with the user in mind as a quality, professional and cost effective addition to your curing process. The actual controls and wiring make up around $100-$150. Metal costs have climbed so the cost to build one is going to be probably $300 to $400 USD higher minimum. This is excellent. We build our gas ovens with the user in mind as a quality, professional and cost effective addition to your curing process. A heating element of a set wattage will pull a set amount of current. I did this build minus the lights, door hole and circulation fan. This oven is built and tuned in house ready to to be piped in and tuned by your mechanical contractor. These ovens arrive at your facility set up, tuned and ready to cook once the gas is ran and power is wired in by a licensed contractor. My concerns here are does heat work like load stress where it is better to spread the load efficiently through multiple stress points vs. concentrating all the stress to one point (hope that made sense). The PID is basically a thermostat, it reads the temperature inside the oven using a thermocouple, then it tells the elements to turn on or off through either a contractor or a solid state relay. If you are going through all of the trouble to build the oven, I highly recommend building or buying a control box as well. Using an equation I found, it came out to 1,700cfms but I don't know how accurate that is since the equation did not include the amount of air changes per hour or anything like that. My oven door view panel busted on first use but I'll fix that somehow. Thank you for the great write up! Just to be sure when put 2 metal stud and metal track you put to make kind of squard or in the same direction. I am limited to 240 volts and 25 amps. brilliant site thanks to the author/s this is helping me massively, im going to be building my own very large oven with a propane burner but have found most of the info on the site extremely useful and the oven is also a very nice design, im chosing propane as i think for me personally it will be easier to control the heat and fit it up as im not great with electronics.. keep it up. I don't know much about the construction of ovens (asides what I have read here) so I have some questions regarding the design of the oven and how it performs on longer parts like bumpers and axles that may hang in front of the heating elements. This oven is built and tuned in house ready to to be piped in and tuned by your mechanical contractor. Thanks for putting the work into it. With the oven running at 400 deg the blower is probably 200+ at the motor. The top of the base should be the same height as the floor of the oven. I am building one the same size and need to incorporate it if needed. Thoughts?? While it is not supposed to be flammable, it would likely loose its insulating properties at 400 to 500 Degrees F. This is an assumption on my part because I cannot find the information online and usually spray insulation capable of handling enough heat are generally much more expensive than the Fire Break spray insulation. It would seem like the best option for filling every nook and cranny assuming it can take the heat. 27320, Monday - Friday: 9:00am - 5:00pmSaturday - Sunday: Closed, We acceptVisa/Mastercard, Discover, American Express, Cash, Powder Coating Ovens Powder Coated Ovens Powder Coated Ovens NC Reidsville Powder Coated Ovens Industrial Ovens Commercial Ovens Shop Powder Coated Ovens A2Z Powder Coating Oven Specifications Free Estimates Custom Ovens Custom Designed Ovens Custom Powder Coating Ovens Shop Ovens Shop Custom Ovens Build Custom Oven. Unfortunately, I don't have any personal experience with infrared heaters. That's the normal outlet used for heavier air conditioners in the home.Never actually load a home circuit at more than about two thirds of constant current!Neither is useful for 8,000 watts, obviously.Using the simple formula of volts x amps, we get the amount of watts a circuit can handle.Switching that around a bit we use watts divided by amps to get the voltage and, Watts divided by voltage to get the amps.Therefor we can use 8,000 watts and divide it by 220 volts to get 36.37 amps. It uses 4 2000W heating elements to accomplish this, which pull a total of 33.33 amps at steady state (there is a higher current draw when the heating elements are turned on). Bought my control panel stuff from Auber and they too did a great job. You can see pictures of this here: https://forum.caswellplating.com/forum/powder-coating-questions/oven-building-forum/14416-a-thread-on-basic-powder-coat-oven-high-temp-fans This way, the motor itself is almost completely isolated from the heat. Our 5' x 5' x 6' gas fired curing ovens meet all requirements to make them a Class A oven. Does anyone know what trim piece was used on the bottom side of the lights? Then a pulley on the top of the shaft that is driven by a belt from a motor that mounts to the top of the oven. Wondering could you provide more details about the wiring of the unit please. I will probably be picking up a bundle of studs and tracks today but I would like to sort this all out before I start building, as excited as I am about this build I want to have a solid design complete before I start building. You should see almost no change.Yes, in terms of R per inch, there is little to choose between fiberglass and mineral wool. I mounted mine on the back and used double wall stove pipe for intake. These ovens arrive at your facility set up, tuned and ready to cook once the gas is ran and power is wired in by a licensed contractor. For the best experience on our site, be sure to turn on Javascript in your browser. I feel that it won't last long at that temp. My next course of action will be to seal the exterior skins, preventing any natural convection in the wall cavities from bleeding thermal energy out of the system. Is there a posibility to get the wireing plan again because the link does not work. Read the article in it's entirety; your question is answered in the second paragraph for the total cost of the materials at the time it was printed in or about 2016. The piece that angles the duct from the wall to the top is called a stack duct elbow. 2 each ssr. If I were you, I would definitely join the Caswell Plating forum and ask them the same question, they have a group of oven builder experts that are very knowledgeable. Then do take the two doors and attach them together and add some hinges on the side instead of the bottom. This panel will feature illuminated controlswitches, cooling fan and upgraded programmable shutoff timer. Hope that helps some. I have completed my build and have an issue with the blower.. "x"x"x, Should I use 6 elements for a 6x6x7? If you install it the same way that the builder of this oven did, I don't see it being a problem. Parts are almost hung, so they would be hanging down. It appears there is just the inside sheathing with no insulation and an outside sheathing of sheet metal.ThanksAndrew. The price I saw for 16 feet of 5mm x 58 inch aerogel was $375, how does that figure into building an 'economical' oven? Thanks for reading. I have corrected the article and the information is now accurate. And cheaper and easier to build. 4 Switch Control Panel For Economy Electric Powder Coat Ovens This comes with the power and heater switch as well as two dummy switches wired to neutral for fans or lights. If that doesn't work, I've got a 1500w system that I'll swap the elements with. The temperature probe is built into the inside wall of the oven to prevent damage. I made mine 36x36x72 and I'm making a rolling rack system and a sliding rack system for it. Thanks for taking the time and having the ability to put this guide together. For 20,000 watts, you'll need 4 5000 Watt heating elements. Also, the approximate cost of each of the major parts are itemized throughout the article; although they may have increased in price over the past four years. This allows the steel studs to fit into the track. Use porcelain fixture as a guide to mark the duct cap. Some places say fiberglass insulation can melt at 200 degrees other say it's at 1300 degrees. Also use countersunk rivets for building the framing and domed rivets for attaching the sheet metal to the studs. These ovens arrive at your facility set up, tuned and ready to cook once the gas is ran and power is wired in by a licensed contractor. I believe most standard household ovens use fiberglass insulation as well. what would the cost be to build an oven that is 10' wide by 8' high by 40' long??
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