Making a Large high temp curing oven

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Making a Large high temp curing oven

Making a Large high temp curing oven

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Kairu	K Kairu posted 5 Years Ago HOT Topic Details
K Group: Forum Members Posts: 7, Visits: 13	Without spending an obscene amount of money for an oven is it possible to create one large enough for like a 16’ boat hull with high temps ranging 250-300 f? If so what kind of things do I need? This area is not something I’m intimately familiar with.
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Kairu	K Kairu posted 5 Years Ago HOT Post Details
K Group: Forum Members Posts: 7, Visits: 13	You said you used fiber cement boards. Like the ones I can buy from Home Depot for bathrooms and or siding? Also why is SSR?
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Steve Broad	Steve Broad posted 5 Years Ago HOT Post Details
Group: Forum Members Posts: 408, Visits: 4.1K	+x Kairu - 5/14/2020 6:29:46 AM You said you used fiber cement boards. Like the ones I can buy from Home Depot for bathrooms and or siding?Also why is SSR? Solid State Relay. PIDs aren't usually designed to cope with heater element power requirements so a relay is used. This is the controller I use. It is the cheapest I could find but is capable of doing everything I want to do and more. 8 separate programs each with 8 segments. Heating and cooling, ramping and dwell are easily programmed, once you get your head around the manual which is written for those who already know how to use these things :-) https://www.omega.co.uk/pptst/CN7500.html I bought the relay from ebay as Omega wanted silly money for it. https://www.ebay.co.uk/itm/162610535630 Likewise the thermocouple: https://www.ebay.co.uk/itm/K-Type-Thermocouple-Probe-High-Temperature-Sensors-with-1-8-NPT-Threads-2m/233254872772?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Works a treat :-)
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Making a Large high temp curing oven

Kairu - 5 Years Ago

I made my 6' x 6' x 3' using 2" x 2" timber frame, lined both sides with 3/8" ply infilled with an insulation of your choice that will survive the temps you plan to use. I am using a standard oven...

Steve Broad - 5 Years Ago

What kind of temps are you achieving? And are they sustained?

Kairu - 5 Years Ago

I am running 120 deg C (250 deg F) and it will run at this all day with the heating element off more than on. Tested to 160 (320) with no issues. I forgot to mention that I also lined the oven with.....

Steve Broad - 5 Years Ago

Yeh something like Steve built is perfectly fine, composite curing ovens are really just glorified hot-boxes. If you needed to reach 250-300° Celcius then it would need a bit more, but ~120°C is not....

Hanaldo - 5 Years Ago

You said you used fiber cement boards. Like the ones I can buy from Home Depot for bathrooms and or siding?Also why is SSR?

Kairu - 5 Years Ago

Solid State Relay. PIDs aren't usually designed to cope with heater element power requirements so a relay is used. This is the controller I use. It is the cheapest I could find but is capable of...

Steve Broad - 5 Years Ago

I agree with everybody here. SSR and PID controllers are great. Circulating fans are key. Fire-proof insides are a good idea. It's still dangerous and you really have to be careful that stuff can't.....

explorecomposites - 5 Years Ago

I did simple 4x4cm metal frame, insulated with 5cm alu sided panels, heated by 2kw industrial blow heater and cover everything with 25mm wood boards.......still runing cheap ebay PID controler trough...

beliblisk - 5 Years Ago

The main advantage of going to 120 deg C is the time factor. One hour at 120 or 4 hours at 100 or 8 hours at 90. I find 120 works fine and have had no issues......so far :-) I had to go down to 80 de...

Steve Broad - 5 Years Ago

i know of a person using a converted flight case with a heating element and PID as an oven. I managed to purchase a couple of cheap lab ovens of ebay and converted them to cure prepregs, and ive mad...

scottracing - 5 Years Ago

Question about the PID controllers is there a good how to install these and use them? looks like im gonna have to install it into some sort of housing.

Kairu - 5 Years Ago

If I were to buy a PID now I would look on YouTube and choose the one with the most how to videos. I have an Omega, which works very well but there are no comprehensive videos on YT. I have now got m...

Steve Broad - 5 Years Ago

I don't think the Omega's are that bad, their instructions aren't the easiest to understand but they're easy enough to figure out. They are also just very good controllers, mine holds my oven to...

Hanaldo - 5 Years Ago

Agreed, I just had a lot of trouble getting my head around the programming, old brain I guess :-) If there had been some how to videos on YouTube it would have saved me a lot of grief :-) Now that I...

Steve Broad - 5 Years Ago

does anyone have links to specific type of material i can use for insulationthat can withstand 300+ F?

Kairu - 5 Years Ago

Links are hard to provide when we are all based in different countries. Just look for fibreglass insulation for roof bats. Kingspan is a well known brand, personally I used Earthwool. You don't need....

Hanaldo - 5 Years Ago

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