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Sully's Double Wall Oven Build

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  • Sully's Double Wall Oven Build

    After reading a lot on several forums, websites and a bit of YouTube, I've taken the plunge and started my oven build. I am doing my different in that the inside and outside walls will not have a direct path for heat transfer... Kind of like a box within a box.
    The 4x4x6 metal stud ovens I have researched have 24 and/or 26 gauge walls separated by the metal studs... My idea is to have a double wall construction where the inside and outside sheeting do not have direct contact (through the studs), hence no direct heat transfer to the outside of the oven.

    Pics to come...

    Sully

  • #2
    Re: Sully's Double Wall Oven Build

    Base frame is 2x2 14 gauge tube steel painted with hi-temp paint:

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    I am using Thermo Tec Exhaust Insulation Wrap purchased from my local Autozone ($49 2"x50').

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    • #3
      Re: Sully's Double Wall Oven Build

      2" wide wrap made it convenient.

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      Last edited by Sully; 08-27-2013, 08:10 AM.

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      • #4
        Re: Sully's Double Wall Oven Build

        that is the way some industrial ovens are made , if you can keep the contact points between both walls to a minimum that will minimize the heat transfert , that means easier to keep up to temp and cheaper to operate . i m just not sure how much one can save compared to the extra cost of building that type of oven.
        insulating the base might help , however most large industrial ovens don t even have a base or floor .
        the walls of the gas oven we use sit directly on the concrete floor and the smaller electric oven has a floor with a 3 inch insulation .
        my electric oven
        http://www.peintureenpoudrepb.com
        http://www.polissagepb.com
        http://www.powdercoatpb.com
        baz

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        • #5
          Re: Sully's Double Wall Oven Build

          Originally posted by baz View Post
          that is the way some industrial ovens are made , if you can keep the contact points between both walls to a minimum that will minimize the heat transfert , that means easier to keep up to temp and cheaper to operate . i m just not sure how much one can save compared to the extra cost of building that type of oven.
          insulating the base might help , however most large industrial ovens don t even have a base or floor .
          the walls of the gas oven we use sit directly on the concrete floor and the smaller electric oven has a floor with a 3 inch insulation .
          my electric oven
          Thanks for the input Baz... Minimizing contact is the aim. The floor will be 5.5" thick, filled with insulation. Regarding cost... the longer the oven is in use, the initial additional cost will be recognized and wash. I am still using the cost saving technique of the metal studs. Additionally, the galvanized sheeting cost will be close to the same as only one side of each wall will be covered... granted, this oven is larger than 4x4x6.

          Click image for larger version

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          Sully

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          • #6
            Re: Sully's Double Wall Oven Build

            Both walls and floor frame:

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            • #7
              Re: Sully's Double Wall Oven Build

              My idea is to have a double wall construction where the inside and outside sheeting The 4x4x6 metal stud ovens I have researched have 24 and/or 26 gauge walls separated by the metal studs... do not have direct contact through the studs,,,...??
              Smile PlzZZzzz…(Usman Malik)…!!!

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              • #8
                Re: Sully's Double Wall Oven Build

                I guess Sully gave up on us and went about oven-building with no ties to us....
                EMAIL scottrodspc@gmail.com

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                • #9
                  Re: Sully's Double Wall Oven Build

                  Work got in the way
                  I dusted it off and started work on the oven last night... framed up the outside walls. I will add more pics soon.

                  Sully

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                  • #10
                    Re: Sully's Double Wall Oven Build

                    Cool, this looks like a good build!!

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                    • #11
                      Re: Sully's Double Wall Oven Build

                      Click image for larger version

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                      Here is the outer wall next to the inner oven.

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                      • #12
                        Re: Sully's Double Wall Oven Build

                        Click image for larger version

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                        Two more... kind of hard to see the gap between the inner and outer. I will be able to take better pics in the daytime. Til next time.

                        Sully

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                        • #13
                          Re: Sully's Double Wall Oven Build

                          How did you size your High Temperature Blower?

                          How much CFM is too much? Is there a risk of blowing the powder off the part? What size blower are you using in your oven, what size oven do you have and does your input equal you output (1:1, 1:2, 1:4 ratio)?

                          Sully

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                          • #14
                            Re: Sully's Double Wall Oven Build

                            I am working on the control panel and finalizing the connections. I have decided to use 3 phase.

                            Items I am unsure of are:

                            The SSRs are rated at 480v 40 Amp - is this 40 from A to B, and B to C ect...
                            Can I get away with using one SSR?
                            The pins and polarity of the thermocouple probe (I have not looked at this closely yet).

                            I appreciate any input. Ed?

                            Thanks.
                            Sully

                            Click image for larger version

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                            Last edited by Sully; 04-13-2014, 03:50 PM. Reason: graphic revision

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                            • #15
                              Re: Sully's Double Wall Oven Build

                              TO Do:
                              - I need and will add the DAYTON 1TDV3 High Temperature Blower 227 CFM blower.
                              - Lights
                              Last edited by Sully; 04-13-2014, 03:54 PM.

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