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Refractory cast from a 2-use form? - Forno Bravo Forum: The Wood-Fired Oven Community

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You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
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We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Refractory cast from a 2-use form?

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  • Refractory cast from a 2-use form?

    I was scheming to go with brick for my second oven, but now I hear my mother wants a pizza oven now too, so I'm compelled to think about building two ovens in my future. So instead I'm wondering if I should go with a refractory cast oven, where I get at least 2 uses out of the form. I see a lot of folks in here build single-use forms, and I would assume industrially they're casting from a very-reusable form, but what about something in between?

    After looking through a lot of people's builds, and doing the math, I am still thinking about sticking with bricks. Say, for a 48" oven, I may be looking at upwards of 300 bricks. If I can do a brick a minute then that's 5 hours. There's certainly a lot of prep work involved in getting all those angles and everything else, but I wonder if I can really get a mold for two uses that would save me time beyond that. Is there anything I should keep in mind to consider casting to make two identical ovens instead?

  • #2
    Re: Refractory cast from a 2-use form?

    It is a lot of work making a mould that will survive two castings. If you take into consideration the time spent in building it you won't be very far in front. Using a sand mould for each build is a far simpler solution in terms of time. IMO if you want to build ten ovens then perhaps a mould that can be reused will become economical. You may come up with a workable solution though, so keep planning.
    Kindled with zeal and fired with passion.

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    • #3
      Re: Refractory cast from a 2-use form?

      Originally posted by Rocko Bonaparte View Post
      I was scheming to go with brick for my second oven, but now I hear my mother wants a pizza oven now too, so I'm compelled to think about building two ovens in my future. So instead I'm wondering if I should go with a refractory cast oven, where I get at least 2 uses out of the form. I see a lot of folks in here build single-use forms, and I would assume industrially they're casting from a very-reusable form, but what about something in between?

      After looking through a lot of people's builds, and doing the math, I am still thinking about sticking with bricks. Say, for a 48" oven, I may be looking at upwards of 300 bricks. If I can do a brick a minute then that's 5 hours. There's certainly a lot of prep work involved in getting all those angles and everything else, but I wonder if I can really get a mold for two uses that would save me time beyond that. Is there anything I should keep in mind to consider casting to make two identical ovens instead?
      Good luck with a brick a minute the last 9 took me 10 hours

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      • #4
        Re: Refractory cast from a 2-use form?

        Generally how long did it take you to lay bricks? It's looking like it would still be faster to do bricks, but I should at least get a better impression. I'll admit I forgot particularly about the keystone on top.

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        • #5
          Re: Refractory cast from a 2-use form?

          I used tapered bricks and cut them on the sides to obtain a 3 mm joint both ways it took me a day a course
          My approach is most likely over fussy but I would be surprised if you can do better then a course a day even using square cut bricks

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