DIY Shop Oven for Heat treatment and more….More, lots more! || RotarySMP
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- Опубликовано: 21 июл 2024
- Home made heat treatment oven. Burnout oven for investment casting. Can cook pizza at a pinch. Made from left overs of calcium silicate insulation.
Here is the VegOilGuys coil data:
www.vegoilguy.co.uk/coil-maki...
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“This is for entertainment purposes only. Please follow all laws in your own country, I take no responsibility for the work of people who are inspired by this video” 
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Speaking as a Canadian and a former professional pizza cook, pineapple on pizza is our greatest shame.
Acceptance is the first step to redemption :)
@@RotarySMP perhaps the missing ingredient is spam, it might go well with the pineapple.
@@HM-Projects Maybe cover the oven CaSi boards with Pineapple?
What's wrong with pineapples‽ Goes perfectly well.
@@jmtx. I think this is a sort of think wars start over :)
That intro had so much ToT-Vibes, like you're twins - still figuring out, who's the evil one ;)
Thanks, but Tony is the Master. I look forward to his next episode.
@@RotarySMP Yeah, it has been a while already...
@@mazchen Tony has to go through some nasty times right now (have a look at his community page), we all should be patient and give him all the time he needs.
@@marcus_w0 Well that sucks :-(
@@RotarySMP so what you are saying, is that you are anakin skywalker. Isn't that the one who end up being the bigggg bad one? I am not sure, Anakin was adding pineapple on its pizza. no, OBVIOUSLY NOT!!! Because nobody does this.
Safety wire pliars!!! Salute to fellow aircraft mechanic!! I’m a retired C-17 Flying Crew Chief (flight mechanic) from US Air Force.
I bet you travelled a lot in that job!
Those Snap-On lock wire pliers are really nice tools.
That crying child on the plane. That brings back memories. Not good ones, good work surviving with sanity intact.
The plane was pretty empty. It was all a bit of a novelty after 14 months.
Yes it does! I got that on a full plane with several crying children from families returning from holidays and if there was a door I could open, I think I'd just jump out of the plane :-)
@@JoseSilveira-newhandleforYT That kiddy fell asleep pretty fast. She was pretty funny in the gate area, sneaking though the turnstyles :)
@@RotarySMP I consider that a blessing :-)
The cacophony in the flight I mentioned, started at that moment our ears start to pop and went on for a long time and, when one got quiet, it was only to be replaced by another one. The fact that it was the return flight from a business trip gone sideways, didn't help with my mood either :-)
@@RotarySMP My last trip was similar. Sydney to Townsville and back. The flight up had a child doing their best performance of "terrible two's". At least the plane was at 30% capacity.
Glad to see you back, thanks for sharing.
Thanks for the feedback. Took longer than expected to make this.
Fun having you travels in the vid, gives a good sense of time. Thanks, keep entertaining me RUclips slave!
Thanks for the feedback. Flying was kind of weird.
@@RotarySMP but seriously, thanks, it's a lot of work to put this together and we love it. Don't go ToT on us 😅
@@bitp1mp Yeah, I think this video ended up cut from nearly 400 clips. Tony will be back, and I am sure he will have some brilliant new ideas.
@@RotarySMP I can't even imagine how I am going to feel the first time I have to step back into an airport. Having to wait in line at a store after after not having been inside one for a year was super awkward and I am sure I will have a lot of 'wait, we used to do this all the time' moments.
@@torpedan Yeah, luckily neither of those trips caused any crowding as the flights were no more than half full (one had only 15 pax.)
Nicely made oven,
interesting mix of music this time
Greetings from Japan
Thanks for the feeback. Glad you enjoyed it.
That was fun to watch :-) Reminds me of my unbuilt oven, still in parts as I bought them about three years ago, and the will to build it just seems to fade, whenever I get close to them - must be some sort of black magic spell :-)
I have had that CaSi board for about seven years :)
@@RotarySMP LOL. I feel better now - still on schedule :-)
@@JoseSilveira-newhandleforYT These things need time to germinate.
@@RotarySMP Indeed. Slow rooting :-)
Pineapple yeah! Awesome build!
You enjoyed it. Thanks for watching.
Good one. A few tips for anyone building this:
Ceramic fiber plates (or the calcium silicate boards used here) can be screwed together with some inconel or stainless steel screws, adds strength to the build.
I also find easier to use rivets instead of welding.
Otherwise super job! I really liked the hinge and door knob, kudos
Thanks a lot.
0:35 Ah, yes, the good old ice cream container. An all-time favorite of shops all around the world, along with a can of Heinz baked beans.
Kiwi's have the highest per capita ice cream consumption. I have a near endless supply of these containers. Need to hit up Eskimo for sponsership :)
@@RotarySMP Do you, though? I've always heard the same thing about Finns. They have a saying "it is never to hot for ice cream"...
@@kain0m Great call. I only went to Finnland once... to Tampere to teach a course. It was a cool trip.
@@RotarySMP Mark, he said "finnland". You were in "Taipei", not "Tampere". so it was Japan, not Finnland... you and the geographie...
I literally have half the parts here and half the parts in mail and then you upload this :D
Perfect timing!
Glad you enjoyed it.
Awesome build! I love the attention you give to aesthetics in your shop projects, giving them a professionally manufactured look. You and Mark Pressling need to have a Australia vs New Zealand shop project face off. LOL!
Thnks would be a laugh. If he won, I would claim to be Austrian :)
Reminds me how we once tried to cook/grill sausages in the heat treat oven at wort (ofc we ended up burning them )
Comparing this to our kitchen oven, this thing blasts up to 200°C in under a minute.
Welding shots with techno in the background were amazing. Love your style, please keep it up!
Cheers!
Thanks for the feedback.
I just love it! Great oven, great pizza. Every time I watch one of your videos I realize how much alike we are. Canadian bacon and pineapple pizza is the Friday night special at our house. For my roomie, I make his half of the pizza a traditional pepperoni with mushrooms, onion, olives, and anything else I can find lying around the kitchen. On my half of the pizza, I put chopped onion, mushrooms, Canadian bacon, and lots of pineapple bits then top the whole thing with handfuls of mozzarella cheese. I usually spend the rest of the night binging on RUclipss and eating pizza. Ahhh, the retired life. I'll be making my furnace later this summer. Thanks again for the inspiration.
Thanks. I look forward to seeing your oven build.
I appreciate the bangin' techno
Appreciate the feedback. Normally the music just gets hate mail :)
Damnit! I was just binging my way through the camera arm vids again, thinking “yeah it’s Sunday night (here in aus) so he should upload a new vid soon, but I need to go to bed soon, and he hasn’t yet, so sweet I’ll just watch this and then...... you upload 🤣
Keep the choice content coming bro, absolutely loving it.
Thanks for the kind feedback. Sorry I missed the last two weeks. This project took longer than expected, and I lost five evenings to the work trips.
Fascinating, thanks. I did think of building one myself but while browsing for suppliers, found a commercial HT oven that ticked the boxes I needed. Only thing missing was Argon purge but I will remedy that if the effort is worth the reward. I started Life as a Toolmaker at 16 from school, spent 20yrs or so in the industry before finding warmer (in the winter) jobs. Now, almost 50yrs later, I discovered that I still carry a candle for Toolmaking and it has become a serious hobby now and since I'm as good as retired, I decided to build a surface grinder from from raw materials (which will eventually be serialised and uploaded to my YT channel).
When I spotted the EU sockets and you said you have 3-Phase, I half guessed you were in Germany (the boarding speech convinced me). I'm a Brit from N. Wales but have lived in Dresden now (where my Gt. Grandmother was actually born) for 21yrs. Went to subscribe to you and found that I already am, then another bell rang: are you the guy who helped ToT out with his Maho wiring?
Absolutely gorgeous Country NZ, promised my Youngest Daughter I'll take her to explore the North Island one day too before we both get too old (and she settles down). Gonna watch more of your offering now (sorry I didn't when ToT mentioned you - but I've been busy myself). Thanks...
Thanks for the kind feedback Martin. I live in Vienna. I also looked out for a commerical heat treatment oven, but never found a good deal.
Fire resistant rope, as used on woodburning stove doors for your door sealing issue, I'd say. and as I type that, I see it's exactly what you did.
I have the rope installed. That is fine. The problem is I tried to make a hot face of fire cement to harden up the surface of the CaSi, but it just crumbles to dust, as the CaSi sucks out the water before it can bind.
@@RotarySMP can you get fire clay? its a refectory cement/ceramic but the water is part of it, so it shouldn't get sucked out. We used it when we made a tandoor and pizza oven.
@@UncySpam Good idea.
Really like the look of the controller with the massive heatsink. Looks really cool.
Thanks. I like it as well.
Maybe add a small argon inlet so you don't oxidize your pizza when case hardening it.
I wathed Tony video on that, and it didn't seem to make much difference. I have some green gunk for protecting the steel surface form oxidation which seems much more effective than argon in a leaking home furnance.
@@RotarySMP I tried that but then the pizza tastes funny!
@@Chris-bg8mk Good call.
Excited to see this, can’t wait to see the next casting attempt after a solid burnout, with a hot flask when you pour!
That was the main driver to make this now. More controlled burnout.
Great channel! The vinegear trick is fantastic. BTW 25:00 - TCs are not resistive elements. They're creating voltage, in microvolts, so it can be amplified, measured and converted to temperature readings. Keep posting vids. You have a really valuable channel! Thanks:)
Thanks for your kind feedback.
There is so much to enjoy in this video.
1. I really miss air travel, even if there is a baby crying. I have learned that traveling with foam ear plugs helps me block out engine and human noise.
2. I appreciate your sheet metal working. I have found that there is precious little of that on RUclips and my skills are lacking in that department.
3. Thank you for showing the site where you can calculate the coil information online. That saves so much time from looking the information up in a book and then having to do the calculations.
4. When you threw the popcorn in the oven, I thought about how bad that was going to stink up your shop area and more.
5. Loved the needle drop when you added the pineapple to the pizza. I wonder how many people will be "triggered" by that.
6. Last but not least, I laughed out loud when you said that the proper way to eat pizza was with a knife and fork. That was a great way to end this episode.
Thanks for all of your incredible content that you share with us. Best wishes to you and your loved ones.
Thanks for the very kind feedback. I hope aviation can recover from this reasonably quickly.
Great looking pizza thingy wotsit oven. If you use vertical then add argon at a low flow through the door you might get good unoxidized parts. Seal up the sides and bottom really well so heavy Argon can't escape. Just a thought. Great build. Good to see you back.
NIce idea. I will be happy if the oven simply survies the 13 hour burnout cycle :)
Always out of this world. Incredibly nice result given all the compromises. Sorry I have no recommendations for a heat resistant hard coat. Great to see you again..... 👍👍😎👍👍
Thanks for the kind feedback.
Nice build, great addition to the shop, if I may suggest when welding angle iron, leave a few mm gap in each joint, less grinding for a flush mount.
I have a similar box with heat treat oven components, to upgrade a simple element type.
Thanks for sharing.
Thanks for the tip. I tried to cut them all the same length, but they all come out slightly longer than the the first, reference one. Weird. Normally I expect to cut too short. :)
Great music in this episode. Also fun build.
Funny, normally I get complaits about the music :) Thanks for watching.
This hits close to home, since I'm making 1.8x1x1m powder coat oven right now (about 60% finished) and later would need heat-treat oven for loosening hardened edges of plasma cut parts for drilling. Nice project. Cheers!
That is going to be a beast of an oven. Are you using K23 bricks?
@@RotarySMP no, powder coat (paint) oven working temperature would be about 210 degrees C, so I'm using sheet metal and rock wool as an insulation. For heat treat oven I'm not sure what I'll use yet.
@@i_might_be_lying Hope you make a video of the builds.
Enjoyed the video and also enjoying the suggestions in the comments. I would eat the pizza but I'm a folder. No forks involved. Hope the oven proves useful!
Thanks for the feedback. I hope so as well.
Those heat sink spikes might be totally unnecessary for the thermal dissipation but they are 100% vital for the aesthetics.
Although, you'll probably find a sharp spot next time you go to swivel it round...
Good call. That huge chunk of heat sink has been taking up space in my junk for years.
Ohh boy, did I enjoy this part! XD Absolute coolness!
Thanks for the feedback. Glad you liked it.
Great work and a lovely drill press u have
Thanks. That drill press is an ARO TB10, made in Vienna in the 1960s
Thats a stylish drill press, very nice unit. Looks a bit like a cake mixer for industrial sized biccy batches. Pineapple, nice touch, surprised you didn't add beetroot as well.
Yeah, ARO was a company here in Vienna. They used to havea sales office on the inner city ring road. Today that is all embassy, hotels and lawyers.
Uh, new Pizza oven.. good for you ! :)
Nice build btw, thanks for sharing !
Thanksfor watching.
nice weld shots!
Thanks. Bit of a pain to keep putting on the ND filter but I like the result.
Vienna airport, long time no see!
Very cool build and a pleasure to watch. Thanks!
Thanks for watching.
Nice build, gives one food for thought.
Cheers Bengt
Or in this case thoughtless food :)
Looked like a Fokker 50, a machine that really puts you back in your seat at takeoff. The Dutch are famous for their clogs and windmills, in the Fokker they combined them both.
Nope, this was an episode dedicated to Canada. Pizza Hawaii and Dash 8-400 :)
As a mortar/glue stuff could try sodium silicate also called waterglass. It's easy & cheap to make using lye and silica gel. I use it as a binder with perlite to cast high-temp insulating parts. In your oven case I'd replace the calcium silicate altogether with vermiculite in the inner side and perlite on the outer by casting the boards using the sodium silicate as the binder.
Yeah, I learned that too late. I switched to using a Sodium Silicate based adhesive as a hard face.
@@RotarySMP some tricks about that: you can cheaply make sodium silicate at the desired strength from silica gel in form of finely ground cheap kitty litter (the silica kind, not the bentonite or wood chip ones), lye and water. As a start, 250g-300g SiO2, 200g NaOH dissolved slowly in 500ml boiling distilled water will give you a medium strength, viscous silicate. You can mix that at 5% per volume with finely ground perlite or vermiculite to cast any shape you want. The kitty litter, perlite & vermiculite can easily be ground down to the point needed by putting them into a plastic bag & invite some friends to dance on it for a while. To harden, the silicate needs CO2 which can easily added to the mix by adding some baking soda and curing the cast at above 80 C so that the mixed in baking soda releases the CO2 right in the part where it's actually needed.
There is no such a thing as Canadian food! Maybe poutine and a few other dishes. But in Canada we tend to eat all sort of foods from wherever they come.
Great oven, love the build!
Except Pizza Hawaii. It is definitely Canadian :)
Take a look at the Bar Z Hotshot 360. He uses a blanket type insulation in the door. It swells up a bit to make the seal to the sides. I used it on my over that i made from one of his kits. Works great.
Is that Kaowool? Did you seal it with something like ITC100? I have some Kaowool left over from my furnace, but would not use it un sealed, as it can cause some pretty severe lung damage.
CM-Ceramics 24" x 12" x 1" 2400 F. 8 Pound Ceramic Fiber Insulation Morgan Ceramics and Knife. USA www.amazon.com/dp/B015GD0QCW/ref=cm_sw_r_cp_api_glt_fabc_MX7D5K88A01Y4ZVRBG8T?_encoding=UTF8&psc=1
@@markcaroll363 The CaSi is insulative. What I need is a hot face which will stick to it and harden it.
I was thinking “Wow, very cool!” until the pineapple. Now It’s full on Awesome!!!
Oh yeah!
Just found your channel and gotta say it’s great stuff! Keep up the wonderful content!
Thanks for the kind feedback.
I got my fire brick from a local ceramic insulation company. The website looked pretty intimidating, the sort of place that supplies goods for big industrial worksites. But I'd heard they deal with consumers too, and after sending an email I was soon offered exactly what I needed at a great price!
You are lucky to find a company like that.
IT's like you are covering for TOT's created void... LOVE your projects
Thanks for the feedback. Tony is the master.
Excellent project, well done, thanks.
Thanks for watching.
Nice musik in this video! Love this style of video more then usual ones.
Thanks for the feedback.
Great project, as usual! One thing to consider using as a sealant is Sodium Silicate Solution ie Water Glass. It won't need to burnout.
Yeah, I learned that too late. I have since covered the inside with a NaSi based adhesive spread thin.
I created a microwave kiln with fiber board and used sodium silicate to harden it too. You have to heat it up to make it solid but works great
@@UndergroundLiving The good thing about that board is that it insulates really well.
@@UndergroundLiving you can also harden it with CO2 gas :)
Great idea about that calcium silicate. I've been struggling to find anything suitable myself. I was almost gone ahead with chamotte bricks and ytong bricks outside for insulation, but that would be hell of a thermal mass.
About sealing the inside. It behives just like ytong, what I made my melting furnace out of. I coated the inside with about 12mm thick layer of chamotte mortar. Sieved the coarsest bits out. (Probably above 1mm) Literally dunked the bricks under water for 5 minutes to get it to stick, behaved just like yours otherwise. But after that it sort of stuck, and its strong enough on its own not to fall off if loose. Oh, and before I fired it the first time I was sure it was going to be a fail, but firing the mortar really helped.
Stick me a message if you want more info on the experiments :)
I finally worked out that the correct german search is "feurleichtstein" There are some good offers for them cheap in ebay.kleinanzeigen.
I also think that soaking them in water would help, but CaSi is way worse than brick fro sucking out the water. The mortar doesnt even really bind, as it the moisture is gone.
So good to watch this process. Pizza Naples-style will ofcourse always be the ultimate prize. Don't mention the pineapple. The trick with the glass wire and heat resistant glue for the door is a really good idea. I'm thinking of making a small one for me with one coil and a tiny inside. No cement on the blocks. Thanks for sharing your process and not omitting any steps that didn't turn out to work for you. I don't weld (yet) but rather assemble it with metal plates and thread screw ends and bolts. Thanks, bye! :)
In hindsight, using that left over CaSi board was an error. It is an excellently insulated oven, but the lining is not robust. I should have bought some of those insulating fire bricks. Once I wear out this oven, the next one will be like that.
Nice project. well done.
Thanks.
30:20 Things you don't want to hear an aviation engineer say XD
:)
I have a photo of myself next to the musicians as a small child. Pretty cool to now know that is still there!
Thanks for the comment.
Sodium silicate is a hot tip for sealing stuff that you still want fireproof =) all tho the melting point might be a problem at higher temps but used for high temp glues etc, sand casting molds etc .. hardens with co2 =)
Thanks for the tip.
What I did was make the interior out of firebrick, surrounded by silica board, surrounded by rock wool, with a sheet metal exterior.
I didn't use a hinged door, but a drop down sliding door.
My casting furnace is a castable refractory hotface, backed by CaSi board, backed by high temp ceramic wool. It is excellent.
I should have bought some insulating firebricks for this build.
How did you seal the sliding door?
I'll eat pizza however I want, you can't tell me how to live my life!
As for the project, I've always want to build an electric furnace after a few attempts at coal/gas ones haven't worked out well. I hope you can do a lot of fun things with this!
;)
I have an oil/gas fired melting furnace, but wanted a more controlled burn out and heat treatment solution. Hope this works.
hello rotarysmp..good video..thanks for your time
Thanks for watching.
4:03 yeeeees my favourite sound effect... particularly on 10+ hours transcontinental flights :) You plan to sleep a little on the plane and then it is enough 1 of these little bastards, and it doesn't matter how far you try to sit away from the noise source, it will be strong enough to hear it anywhere :)
Cute little kid. She fell asleep just after that.
I don't think you're alone in finding your projects don't go as smoothly as you thought. Part of the problem is that we are so conditioned to mass produced "perfection" we have a vision of all objects that assume a perfection that can really only be achieved in runs of 10,000 or more. Its good for all of our souls to see the imperfections as well as the thought processes that encourage us to try things ourselves.
Thanks for the positie feedback. If this one falls apart soon, I am pretty sure V2.0 will be better. :)
poly(methyl methacrylate) is just acrylic/plexiglas. It's also used as surgical cement for orthopedic work, like keeping hip implants in place. It came about because, surprisingly, WW2 pilots did not have terrible reactions to acrylic shards. These splinters of plastic were the inevitable result of being shot at in a plane with acrylic windows. At least, that's how I heard it. Thought it would be interesting because of your connection to the aviation industry.
That is a cool fact. Thanks for sharing it.
Love your contents. Greatings from Belgium! Great choice to go with the RAL 6011 for your machines.
Thanks for the feedback. I was in Belguim the week before last. (only at the BRU airport). RAL 6011 is a cool colour.
@@RotarySMP I have also included a link for the K23 bricks and mortar in EU but got removed. In case you will need more in future search for thermall .nl
@@Ale_Lab Thanks for that. If this one falls apart, I'll make the next one better .
@@RotarySMP No problem I was searching for that material too few months ago so I had few links saved. There are other shops too but that one had everything at good price.
@@Ale_Lab Since I already had the CaSi boards, it was inevitable that I use them, but it might have been false economy.
You might want to add a sized fiberglass reinforcement to the mortar, might be enough to stabilize any mortar. A modified mortar, like a self leveling kind might also work but i'm unsure on it's temperature durability
Thanks for the tip.
I didn't think your cross bend looked crappy. If anything that little bit of an outward bend may save your firebrick from being broken
There is a type of foam you can buy that acts as a heat conductor and is commonly used in consumer electronics, but does have pretty good thermal resistance. I imagine they have some for electronics which would be near a hot oven. You can also get thermal insulating foam which is good to prevent heat from flowing things you touch or things sensitive to electronics. I do not know how hot things will get but it works well
I used some heat conducting paste on the SSRs.
Methacrylate is one of the preferred adhesives for aluminium and also for bonding dissimilar materials. Surface preparation before bonding is key to an effective and reliable bond.
... and not overheating it on the lathe with a tool rubbing. Ask me how I know :(
It got epoxied half way through that.
Hilarious, thanks, I don’t need an oven, but now I’m tempted to make one...
Go for it. Very handy device. Tanks for the feedback.
For the cement, maybe try going to an oven builder ("Ofenbauer"). There should be plenty such outfits around Vienna. Austria has a tradition of masonry ovens in homes, and these are typically built in place, so these builders may have the necessary materials available for you.
I doubt they have anything to stick to CaSi board though, as that is an isolation product, not a furnace product.
I assume everyone has already mentioned Satanite and the other similar kiln coatings (refractory cement and sealers), but if not, that’s what I would go with. It’s meant to me used in kilns and other very hot ovens, so it can withstand the heat. It will protect your soft bits and refract the heat back into the oven.
Problem is, most such recommendations are from USA, and there are different brands in Europe and it is difficult to find correspondence between different products. For example, there is no Satanite in my country and I can not find anything with analogous characteristics.
@@blacklion79 that’s interesting. I’m not terribly surprised at the naming, but there must be manufacturers of kiln supplies...
@@johnmccanntruth Yes, there are some, but looks lik Satanite is really outstanding and another problem is retail. You could find some manufacturer's site with interesting product only to learn that they want sell 100kg bags and nobody re-packs same product by kilo. But my country is not channel owner's one, maybe it is better in Germany (or is it Austria or Switzerland?).
@@johnmccanntruth USA really looks like heaven for any DIY from my side of pond & border :-)
Yep, that is the problem. I have seen Stanite and also ITC100, but know of nothing equivelent here, or in realistic quanitities.
I'll pobably end using a sodium silicate based mortar as a hot face.
Good build... See you next week...
Thanks. Hope so.
RTV is high-temp silicone. It's used to make engine gaskets. It'll work better than the JB Weld. Although, the JB is really good stuff. Any place that sells stuff to repair a car will have the RTV.
Thanks for the feedback.
Take a look at Blackbeard projects, he just did a gas forge build, looks like he used mineral wool, some coating which he fired to make it solid and then a cement over the top. He is in Italy I think.
In the US you see people using ITC100 refactory coating for this sort of thing, but I could find a vender in Europe.
You are such a getto builder.
I bet the experts are freaking out watching this. I love it.
I missed the part where you made the coils?
I think you should have built a much larger unit. Not much more effort but allows you to powdercoat much larger parts
The coil winding is in there. That is pretty simple, and went smoothly. I have never tried powder coating... yet :)
99% on home projects, but 100% on day job! :) Love the video's
Cheers
Thanks for the feedback.
Here in Belgium I use a sodium silicate based high temp adhesive, comes as black paste in caulking tubes. Called Soudal high temperature adhesive. It's rated to 1500 °C.
Yep, that seems like the stuff I need.
@@RotarySMP it's really thick so It won't seep into the pores. If you can't find something similar I would recommend making sodium silicate from sodium hydroxide drain cleaner and silica gel cat litter (theres how to videos on youtube). If you mix that with clay powder or backyard dirt you get a similar refractory paste.
Thanks for that. I am pretty sure I can get that stuff in a tube.
I ordered a tube of similar stuff, from Fermit. Should arrive this week. Thanks.
Nice job!
Thanks for the feedback.
I'd be curious for a follow-up video reviewing what you'd do differently now that you've had time to use this oven for a bit. Interested in making one myself and would very much like to understand what you've learned.
I would not do it again with CaSi fiber board. I would by a set of those insulatinfg firebricks. The only other change I would make (and sooner or later will make) is to switch out the PID controller for a controller which can be programmed with a temperature ramp. There is an English guy who offers such a controller widget. Babysitting the oven to ramp over 12 hours for burning out investment gets annoying fast.
@@RotarySMP The PID feature didn't seem overly difficult to simulate on a Pi or arduino, which would get you the ability to define ramp as well. I basically have something like that already working in my beer fermentation fridge. I found the below video useful on the subject, btw. He had the same mortar issues as you but then shifted brands to fix.
ruclips.net/video/7FalYyVASyw/видео.html
Sodium silicate as glue? I don't know about comparability with your insulation! Tack welding tip, use a smaller rod to tack, (eg. 2.5 set at 3.2 heat when your going to weld with 3.2), your tack will be smaller allowing easier final weld!
All the best, Matthew.,
Thanks. That is a great tip. I often run up against the big hill tack.
I worked in Hamburg in the 90's before moving to the US. Good to see the airport again after all these years although the empty halls is kinda spooky. While I worked in Hamburg I did consider commuting daily from the UK but spending more time sitting on the M4 leading to and from Heathrow airport than the actual length of the flights quashed that idea pretty quickly. Oh, and I can totally sympathize with you on the screaming baby. The stories I could tell. shudder.
Yeah, airports are all like ghost towns at present. Hopefully things pick up again soon.
Sounds like you need some refractory cement, or mortar. The stuff they use for "gluing" kilns together.
Yep, but cements I already tried. The CaSi sucks the water out before they can bind, so the mortar falls to powder.
There are a lot of fenders for the K23, K26 bricks. You should look for "firebricks price". They had it in the Netherlands.. Its cheap.
Greetings,
Jeff
I found "feurleichtstein" was the term I needed to search for here.
@@RotarySMP "vuurvaste stenen", "pizzaoven shop", "goedkoopstekachelpijpen", "kachelmaterialenshop", and "gaswinkel" had some pretty good deals. The kachel materialen shop had the 1750C brick and grout/mortel. Im not sure which grout i should buy to be able to get the 1750C, but if i buy, id just email them or call. :)
Greetings,
Jeff
@@jeffjefferson2676 you only really need 1750°C materials if you are making a gas or oil fired furnace, or doing a really high tech electric arc etc super high temp oven. Resistance ovens based on Kanthal are going to mx out bay about 1100°C
The world's first airplane mechanic CNC machine builder/operator vlogger.
... and pizza chef :) Thanks for watching.
I think you might want to try to reinforce the mortar with a Fibre or cloth for some strength if it's not too late and maybe drilling anchor points
The whole thing is held together pretty firmly with the steel cage. I was trying to harden the surface with a sort of hot face, but the CaSi just sucked out the moisture before it could bind.
In pottery shops (I mean where you can buy raw materials for pottery), they often sell insulation bricks, ceramic wool and other kiln parts too. Have you looked there?
I bought some stuff from a place like that in Vienna about a decade ago. Need to see if it still exists.
@@RotarySMP Oh the Vienna - beautiful but boring city with cold people all working in insurance companies or law firms. Reminds me of the overpriced Petzolt shop where I used to buy drillrod steel and brass sheets. I had been dealing with almost non-existance of the soft white firebrick in Europe 15 years ago - I found some in a shop dealing with selling supplies for ceramic makers - it was a german brand I remember quite precisely. I find it baffling how many things in central europe are not available while you can find it in any home depot in US. The other thing that is bafflingly hard to get is solid dried wood thicker than 20mm - exotic types? Forget about that if you don't know the secret handshake with big wood suppliers.
@@chronokoks Yep, that about sums it up :)
Best mortar would be"Water glass" Used for car exhaust repair and available in UK
Thanks for the tip.
you should have use hot glue;)
Really. The stuff that comes in sticks with the white stuff on the outside.
A good build and video. Just one question. The main electrode connections at the top and bottom of the furnace seem to have no electrical insulation. Is this the case or did you forget to video the fitting of insulation covers ?
I put a cage over this area John. What insulation would survive that heat?
@@RotarySMP That's fine. I didn't notice that you had caged off the connections 👍
You really got your money back since the day you bought that ice cream!!! 😂😂😂
Oh yes.
You could try to mix some water glass (sodium silicate) through your cement to make it stick better, and perhaps some (chopped up) glass fibre.
I have had some tips on a sodium silicate based mortar which might work as a hot face.
The same place that you bought the sealer paste and cord for 'log burners' from, should also have tubes of refractory mastic for use sealing the joints and pipework on log burners and cookers. Its temp resistant up to 1500c, we can buy in Spain (most heating is log burners) The label has instructions in Spanish Polish and French so must be widely available also in your area. The company label says Pyro Feu, hopes thats of help.
Is that a black goo? Maybe it is the same stuff that was in the little tube I got with the sealing cord. That didn't get sucked into the CaSi. If I could get a whole tube of that, It might work well.
@@RotarySMP Yes, same stuff, it sets solid after about 20 minutes, its like concrete. Its for making things like chimney flues and joints on above fire tight. It comes in 400ml cartridges.
@@bandk2000 That sounds like the stuff I need. It is really only the door hot face where I need it. Alhough a layer to strengthen the floor would also be good.
...
I ordered a couple of tubes of this. Hope it arrives this week.
Hey, thanks for the video. How did the calcium silicate hold up? I had a couple of boards (Silca) I intended to use for just this kind of oven. But then one day... I made a trough out of them to contain a wood fire. They became really fragile after that, I wonder if they can stand up to bronze melting temperatures, like 1000-1100 deg. C. Some stainless steels need that range too. How is you oven after some use? Those boards aren't expensive either and very convenient to work with, but only specified to 1000 deg C. Soft fire bricks - 1500+ which is plenty, but way less convenient due to small size.
I should have bought light fire bricks. The CaSi boards inside are still working well, but the door has been a problem as the stuf I coated it with fell off, then the second door insulation covering was too thick NaSi grout, which shrank and torn as it dried. It is looking pretty beat up.
Use glass fiber wire for door insulation. Edit Oh, you already did it :D
Yeah. It works well.
Midwest makes the best offset aviation snips ive ever used.
I am not sure which brand my green ones are but I got them in the states. The linkage ones I have are all cheap non-brand and pretty crappy.
@@RotarySMP MWT-SS6510L and MWT-SS6510R are the part# on my set. Meant for cutting titanium and inconel but i use them for general purpose.
Highly reccomend a set!
Ah, the red AUA uniforms. Never thought I'd miss seeing them.
Not the most flattering ever :)
@@RotarySMP so true.... But certainly unique.
So thats the reason you didnt upload a video in the past 3 weeks
Yep. I thought it would take a week, but my plans never work out, and then I lost five evenings to work trips.
Regarding the mortar, have you talked to a traditional "Ofenbauer" where they get their stuff?
Good tip. I haven't. Isn't that what the Internet is for :)
Great humor!
Thanks.
Those empty airports were downright spooky. Haven't seen anything like that since Helsinki airport in late November/early December a decade ago.
I thought it was especially weird that they turned of the lights in the Vienna terminal, you had to walk through to the parking garage.
Hi and congrats for the building. I have a question for you, Is gasbeton panel equal to calcium silicate panel? I wonder if it is the same product and here in Italy they call it Gasbeton which is really common in construction stores were they sell bricks and cement...
I dont think so. I am pretty sure Gasbeton is Ytong. Which is cement and pumice. Portlands cement breaks down at elevated temps, so you want to avoid it if possible.
@@RotarySMP ok thanks for the advice. I am not planning to build an oven like that in the near future but sooner or later I will so better keep myself updated.... 🤣
Thats a cool video, for fire proof cement you may wanna look up "Firefix Feuerfester Zement" from OBI (german hardware store).
That looks like pretty much the same stuff as the two different ones I bought at Bauhaus. The CaSi just sucks the water out before it can bind.
@@RotarySMP hmm I see your problem cause the CaSi acts like a sponge I guess, have you tried wetting the CaSi to the point where it doenst suck the water out?
@@callmeasuka5849 I tried that as well, but it is more absorbent than a babies diaper.
@@RotarySMP thats going to be hard, my last idea would be "Ultrament Bastelbeton" its like molding clay or you could use normal clay, wetting it a bit may make it stick to the CaSi
@@callmeasuka5849 That little tube of black adhesive they provided with the seal cord stuck to it nicely and worked, and I suspect the same black hig temp morter is available in the silcon tubes. I will try that.