The "Kooka Muller", a DIY Sand Muller for the Home Foundry - Final

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  • เผยแพร่เมื่อ 31 ม.ค. 2025

ความคิดเห็น • 215

  • @hairyfro
    @hairyfro 5 ปีที่แล้ว +17

    My wife walked in while I was watching this, and now I have some explaining to do.

  • @metalworksmachineshop
    @metalworksmachineshop 5 ปีที่แล้ว +1

    The wife caught me watching you polishing off your knob... nice job on the muller. The ID tag at the end is a nice touch.

  • @fixitmakeit
    @fixitmakeit 5 ปีที่แล้ว +1

    Bravo sir! The muller, the gags and the climax, all awesome .

  • @bobolander
    @bobolander 5 ปีที่แล้ว +2

    25:16 PISSING MYSELF LAUGHING!!! Great little series mate, love the desiccated humor too!

  • @russterman1
    @russterman1 5 ปีที่แล้ว +6

    Brilliant stuff mate......And yes we all liked the knob gag :-) keep em coming (cough)

    • @mickdoherty8633
      @mickdoherty8633 5 ปีที่แล้ว

      A happy ending indeed! 😃😉👍

  • @WorkshopUp
    @WorkshopUp 5 ปีที่แล้ว +3

    Great job Mark. Love your sense of humor. I look forward to your next project.

  • @joell439
    @joell439 4 ปีที่แล้ว

    👍👍😎👍👍. Mark, Fantastic series. Learned a lot in the process. Now.... on to the next exciting playlist to devour. All the best to you. Joel....

  • @opendstudio7141
    @opendstudio7141 5 ปีที่แล้ว

    That was fun. I'll have a smile going for some time from all the innuendo. As expected, you exceeded what was required for a proof of concept and held up the fine tradition of Presling craftsmanship. Bravo!👍
    As stated on Fireball Tools channels' comment section; "A JOB WORTH DOING IS WORTH OVERDOING" (regarding his behemoth belt grinder).

  • @AtticusDraco
    @AtticusDraco 5 ปีที่แล้ว

    My wood handle is bigger
    I can honestly say,
    this the best "Kooka Muller" that I have ever watched being assembled!
    Well done, MP! Well done. Good show

  • @filopat67
    @filopat67 5 ปีที่แล้ว +1

    In my language we call those ploughs wings or knives. I would suggest making next ones (you probably need to replace them sooner than you think) a bit longer, so that they would scoop up and mix the sand also on the rollers path. Heavier and/or narrower roller is also on my list of suggestions. I have a roller that weighs 60kg on my muller and it still wants to slide instead or rolling when there is big enough lump.
    But it works! Sure beats breaking the lumps and mixing by hand. Congrats!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Good grief! 60Kg! I am going to fill my roller with concrete but it won't be more than 10 or 15kg I am guessing.

    • @filopat67
      @filopat67 5 ปีที่แล้ว

      Yeah, it's an industrial muller capable of mixing 150kg sand per load. 7,5kW electric motor @1000 rpm that's geared down to 30 rpm at shaft. It has a stationary bowl and upright shaft that rotates ploughs and the roller. I never put any part of my body into the bowl when the muller is working. If that thing catches you, it won't let go. :)

  • @gh778jk
    @gh778jk 5 ปีที่แล้ว +1

    Nice project.... it would be a pity to get it dirty!
    As an EE, I can testify to the fact that, if you fill the aluminium enclosure up, with clean water, you'll be as safe as houses!
    I think you are very courageous for making such a machine in a country where everything that draws breath is trying to kill you.... very brave indeed...
    Kisses!
    Paddy

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Even the trees try to kill you here!

  • @dirtyknuclesde
    @dirtyknuclesde 5 ปีที่แล้ว +8

    I love the humor! I think the whole thing turned out great. What about a “

    • @Preso58
      @Preso58  5 ปีที่แล้ว +3

      I am going to have to do a lot more testing with the muller but it is going to have to wait. My wife and I are due to leave on a holiday to Europe shortly and we are going to be away for a couple of months. I found it surprising, but there were very few resources that I could find on the web regarding designs for small DIY sand mullers. The one that I based my design on was by Luckygen1001, a fellow Aussie and a very experienced foundryman. I am going to have to pick his brain when I get back from our trip.
      Regards,
      Preso

  • @paulmuff9883
    @paulmuff9883 3 ปีที่แล้ว

    Just finished watching them all , great videos + your work shop skills are good also, thanks for sharing your hobbies 👍

  • @RockingJOffroad
    @RockingJOffroad 5 ปีที่แล้ว

    I am no expert on mullers, but this one is the nicest homemade unit I’ve seen! Great job polishing your knob!

  • @dirtdart81
    @dirtdart81 5 ปีที่แล้ว +2

    I would suggest a third plow right after the roller to move the sand to the sides, then the two you already have will roll the sand back to the middle. This might help with the sand staying in once place and getting compacted.

  • @ScottHiland
    @ScottHiland 5 ปีที่แล้ว

    Comedian, wood turning, and your welding is improving, too?
    Pretty soon you'll also be an internationally acclaimed ballroom dancer doing the bogo-pogo.
    Beautifully done, as always, Professor Presling!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Did I say I cannot dance?

  • @camatbattler2233
    @camatbattler2233 5 ปีที่แล้ว

    G'Day Mark, they always need to be fine tuned after the build to get them working right. To add more weight to the wheel I fitted a heavy compression spring off an arm with an all-thread adjustment screw to adjust the weight applied by the roller, worked really well. I also found adding a thin tapered grader plough across the base that allowed the sand to be lifted and layered rather than being rolled and compacted it the same spot. Keep the sand moving around as much as possible. With my green sand I found it always stuck to the roller and base so I added an adjustable scraper to peel the sand away and am looking at attaching a nylon sheet to the base.
    Cam

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Cam, thanks for that. Lots of good advice coming in now. Unfortunately, as soon as I got the muller finished it got wheeled up against a wall and I was off on another tangent. You should see that video out in a few days.

  • @mickdoherty8633
    @mickdoherty8633 5 ปีที่แล้ว

    Mark. Fantastic series and a great finish. Without a doubt, your best video to date. Pissed myself laughing with wooden handle! Good old Aussie humour! Keep up the good work mate! Cheers Mick

  • @askquestionstrythings
    @askquestionstrythings 5 ปีที่แล้ว +9

    I'm always heard those "plows" referred to as scrapers. Some DIY designs I've seen also fold the sand over to increase mixing of the sand.
    A wheel scraper to keep the wheel clean will help.

  • @Tule54
    @Tule54 5 ปีที่แล้ว

    WOW! The nicest sand muller I´ve seen. You are a man of many skills and I love your sense of humor. Looking forward to your next projekt.
    Cheers
    Leif

  • @waynec369
    @waynec369 3 ปีที่แล้ว

    Excellent work! I have sand muller envy.

    • @Preso58
      @Preso58  3 ปีที่แล้ว

      Thanks, I am too old to be down on my hands and knees crushing lumps of sand with my bare hands.
      Regards,
      Mark

  • @michaelclark2840
    @michaelclark2840 5 ปีที่แล้ว +1

    Nice build indeed.
    I would extend the centre scraper outward further to break up the compacted sand after the roller.

  • @iTeerRex
    @iTeerRex 5 ปีที่แล้ว +13

    Very nice, all the way to the finishing badge.
    By the way.. What do you think of a rake or plow after the roller, to break up the compressed sand?

    • @markfryer9880
      @markfryer9880 5 ปีที่แล้ว

      I was thinking about that question as well. Plus a scraper blade to clean stuck sand from the roller.

    • @Preso58
      @Preso58  5 ปีที่แล้ว +3

      Yes, I have some tweaking to do. For now, I"m just glad it's finished

    • @SeanBZA
      @SeanBZA 5 ปีที่แล้ว +1

      @@Preso58 Simply add a scraper to roll the sand to the outside edge after the roller, so it continuously rolls the sand from inside to outside and thus mixes it.

  • @seanrodden6151
    @seanrodden6151 4 ปีที่แล้ว

    Gday Mark. I love the care you put into your work. Dunno if you've tweaked the Kooka in the last year but I think you need another plough or two to break up the middle band. Otherwise clumps that get into the middle will just get buried and stay clumps.

    • @Preso58
      @Preso58  4 ปีที่แล้ว +1

      Sean, my biggest problem is that the sand tends to stick to the roller. It sometimes forms large clumps that have to be scraped off otherwise the roller stops turning. I tend to roll the sand dry first to break up all the lumps and then add enough water to form properly clumping greesand but therein lies the problem. I should really make a scraper to keep the roller clean.
      Regards,
      Mark

    • @seanrodden6151
      @seanrodden6151 4 ปีที่แล้ว

      Just had a look at Chirpy's one and yep, he's welded a scraper just a tair or two above his wheel. Pretty easy to see here. th-cam.com/video/e4ALY4c0sxQ/w-d-xo.html

  • @captcarlos
    @captcarlos 5 ปีที่แล้ว

    That, as they say, is a Bobby Dazzler!
    I'm sure there will be refinements...
    Good vid, kept flowing nicely.
    Good Aussie humour.

  • @pgs8597
    @pgs8597 5 ปีที่แล้ว

    G’day Mark, you just can’t help yourself, name plate. Job well done and waiting for the modifications which are presented in the comments, many to choose from.
    Yesterday I conditioned my green sand, wish I had your muller:(
    I must say you are a confident man to paint and finish before it is thoroughly tested but hey it works.
    Cheers
    Peter

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Peter, Ahhh, there's the problem with making TH-cam videos. You are under pressure to put something out there and that often means taking risks as you have identified. I am already regretting the decision to powder coat the ploughs. Some people have made some valid observations and I can see that I may have to modify them. Getting powdercoat off a part means using a chemical stripper and then sand blasting!
      Regards,
      Preso

  • @AmateurRedneckWorkshop
    @AmateurRedneckWorkshop 5 ปีที่แล้ว

    Great project and a really nice muller. Thanks for the video.

  • @normdoty
    @normdoty 3 ปีที่แล้ว +1

    you should have removed the bell from the rear of the timer this would allow the timer to fit in the plastic box , or you could have opened up a hole in the back of the plastic box to give clearance for the bell if you don't want to remove it .. great video , love the Muller if i ever get back to casting i will also make one for my foundry ..

    • @Preso58
      @Preso58  3 ปีที่แล้ว

      Thanks. I did want the little bell to remain on the timer. It reminded me of the very first Toshiba microwave oven that I purchased back in 1983. It was massive and weighed a ton and it was still working up until a few years ago. I have done a few upgrades on the muller, mainly to do with the drive pulley arrangement. It was very hard to tension the belt sufficiently so I added a cam to crank the motor mount away from the drum centre line. I also fitted ball bearings to the weighted roller.
      Regards,
      Mark

  • @lv_woodturner3899
    @lv_woodturner3899 5 ปีที่แล้ว

    I loved this video. I do a lot of wood work and wood turning in addition to machining. I love my spokeshaves, I have concave, convex and flat. The flat one is my favourite. Nice work on the handle. I prefer to use hard back saw to cut off my wood turning projects rather than parting tool. I find this gives me better control and easy clean up.
    I got a big smile from the final reveal of the nameplate, very well done.
    I think the muller may work better with an inner ring to prevent sand getting on the inside, and a third rake to lift the sand similar to the action of the shovel at the end.
    Dave.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      I watched a very experienced wood turner part off pieces with a skew chisel and he could do it so that there was almost no broken grain on the end. If there was any left he would just pare it off with his skew which was always razor sharp. He would do it with the work between centres too. I was never game to try it in case the work got flung out into my head!
      Regards,
      Preso

  • @tobhomott
    @tobhomott 5 ปีที่แล้ว

    Oooh, pretty! Nice job, you had me worried for a second when the wheel didn't want to roll right off the bat there, but I'm sure it won't take you long to figure out how much sand and water it likes and make any adjustments. The music cracked me up too, nice touch.

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      I think there was a bit of paint in the opening of the end plates. It soon freed up. I have noticed that it can get hung up on a big lump of sand though.

    • @tobhomott
      @tobhomott 5 ปีที่แล้ว

      @@Preso58 hopefully you'll get that sorted out too, it will be a bit discouraging if you still have to break up all the clumps by hand before you can dump your sand into the muller! Now you've got me wondering how it'll deal with bits of tramp metal in the sand too...
      Anyhow, at least we already know the overall design is sound, from Luckygen's example. Sounds like you just have a few minor bugs to work out of the system is all.

  • @ianbertenshaw4350
    @ianbertenshaw4350 5 ปีที่แล้ว

    Never thought of using alloy box section and post caps to make a project box !
    Looks fantastic ! i wonder if setting up a water bottle to drip feed the water in might work better ? Once you have your ratio right you could load up the muller , fill the bottle start it up , set the drip feed and forget about it for half an hour .

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Ian, I have had strict instructions on the ratio of water from none other than the legendary Sandrammer. He assures me it must be 5% so that's what I will try as soon as I get around to my next casting.

  • @ranchis9044
    @ranchis9044 5 ปีที่แล้ว

    brilliant machine. I wonder if adding a rake or plow attachment after the roller would help to roll over the build-up of sand in the path of the rollers.

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      That's something that I will have to experiment with. As it stands, the muller seems to be producing greensand that is way more consistent than I had been able to produce by hand.
      Regards,
      Preso

  • @mrrberger
    @mrrberger 5 ปีที่แล้ว +1

    Cool work, that top wood strip could have been left proud to act as a sacrificial bumper for castings and spade leverage. Love the range of skills you use.

  • @lloydmilton
    @lloydmilton 5 ปีที่แล้ว

    a fellow aussie here who is also a hobbyist metal caster, machinist and fabricator, i'de love to see your powdercoating setup and can only dream of how great it would be for you to do a powder coating video :)
    Oh man that rubbing in the wood wax - almost pornographic :) loved it :D
    I think it's fantastic that you were a teacher - clearly metalalwork or woodwork:) When I was at school all 3 trade classes (metal, wood and plastic) where my favourites, sadly when my own kids went to school they had removed those classes from the curriculum :(

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Lloyd, check out this video where I go into some detail with the powder coating th-cam.com/video/0V0OvAtBxT8/w-d-xo.html
      It starts at about 4:00. I think the powder coat setup was the single best investment I made for my shop. Initial outlay is a bit steep but certainly under $400 if you already have a compressor and the oven came from a skip in the back of my local electrical appliance repairer.
      Regards,
      Mark

  • @Blackcountrysteam
    @Blackcountrysteam 5 ปีที่แล้ว +4

    Nice job think I'd be tempted to put a type of 'ski ramp' just after the roller

  • @BravoCharleses
    @BravoCharleses 5 ปีที่แล้ว

    That bender is brilliant! Good on ya!

  • @matthewf1979
    @matthewf1979 5 ปีที่แล้ว

    Top notch work, Mark. The brass tag is a very nice touch!
    Some lead shot would work fine to get that roller working better.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      If only I had some! I am thinking I will try some concrete.

  • @dalejones4186
    @dalejones4186 5 ปีที่แล้ว

    Looks like a wiper for the roller would come in handy. Great video

  • @sandrammer
    @sandrammer 5 ปีที่แล้ว +1

    All of the mullers I've used, the metal pieces that pushed the sand under the wheels were called plows. Perhaps in England they're called rakes, but I've never heard them called rakes. Just for your information, I learned an excellent recipe for green sand while in the Navy. Easy to remember too. When mixing the sand with the clay (bentonite for us) you use the ratio of 95% Sand with 5% clay. Once that mix is done, weigh the mix then, while it's being mulled, introduce slowly 5% water. So if you have made a batch of sand that weighs 100lbs, you add 5lbs of water. The muller is beautiful and if you have any questions please ask.

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      Sandrammer, thanks for the recipe. I did use bentonite but sadly I was too disorganised to weigh it out and keep track of the ratios. I just kept adding the clay until it looked about right. I do have plenty of the sand which is very fine white beach sand that has been washed. I can add more sand easily. The water content was the thing that I was obviously messing up. I will try your method of weighing a batch of the dry greensand and calculating the 5% water content.
      Cheers,
      Mark

    • @markfryer9880
      @markfryer9880 5 ปีที่แล้ว

      Only 5% bentonite clay well that's interesting.

    • @sandrammer
      @sandrammer 5 ปีที่แล้ว

      @@markfryer9880 , don't forget that's 5% by weight. If you're going to make a 100lb batch, for example, you'd put in 95lbs of sand and 5lbs of bentonite.

  • @just_a_guy_doing
    @just_a_guy_doing 5 ปีที่แล้ว

    Mark, love the projects, would love to see your powder coating setup, my father in law has a commercial powder coating business here in Buffalo NY, with a huge oven, 24 feet deep, 10 foot wide and 8 foot tall. He always describes the baking process like something you'd cook in your home oven, set the temp to 400 degrees Fahrenheit and cook it 20 minutes. They just cooked a 500 lb solid steel part a few weeks back 2 hours it sat in the back of the oven waiting for the hunk of steelnto heat up. They are a job shop, all custom work. Car frames, fencing, frames like the one you painted., etc

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      DIY Chad,
      I must say I am a bit of a fan boy for powder coating. It is so much better than painting both in terms of the finish and the durability of the coating. I showed my powder coat setup in some of my other videos. I think the one on the Stuart Turner steam engine shows it best. I think it is part 11. Your father in law's oven sounds like it could cook a whole car. I worked at a furniture factory that had a continuous gas fired line oven for baking school desk frames. It was about 40' long.
      Thanks for watching.
      Regards,
      Preso

  • @stanwooddave9758
    @stanwooddave9758 5 ปีที่แล้ว +2

    The big reveal, very well done. If I may make a suggestion, the outside of the (weighted) wheel being smooth, why not try putting on some teeth, like on a earth moving equipment. I would start with just 4 (four) at shall we say the point's of a compass, i.e. North, East, South, West. If your competent with your welding ability, attach round stock, via just some heavy tack welds at the very outside edge. I would start with 0.500" in. (Approx. 13 mm) round stock. You may want to even start with say 0.750" in. {1.905000 cm} If it doesn't work out, their's no harm to the roller. I'm not sure if starting small (round Stock) going big is the correct way to go, or maybe it would be better to start Big (round Stock) and go smaller, depending on results. Great build.

  • @leeking2299
    @leeking2299 5 ปีที่แล้ว

    Great job Mark, I especially liked the name tag at the end, nice touch! On another note I don't know if you have had a dip in subscribers? I popped youtube on this morning before work and noticed it said new youtube terms do you accept, so I clicked yes came home this afternoon and found all my subscriptions had gone alone with all my watch history, so now I am having to try and remember everyone I have subbed to, Thanks youtube!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Lee, I did not notice that myself. Maybe it's a regional thing?

  • @charles1379
    @charles1379 4 ปีที่แล้ว

    great job on the KooKa Muller.
    may I suggest that the "ploughs" when acting together need to cut across the full width to the sand track to remove the undisturbed band of sand that runs directly under the roller.
    for instance the inner plough should go to half way in the roller track as should the outer plough, in this way all the sand is turned over, so to speak. then possibly a pair of ploughs directly before the roller to centre the sand to run under the roller.

  • @dizzolve
    @dizzolve 3 ปีที่แล้ว

    beautiful ........ what do you think about adding another plow to disturb the sand that forms under the wheel? ....... a plow shield say opposite the wheel that pushes the sand off the bottom of the drum

    • @Preso58
      @Preso58  3 ปีที่แล้ว

      You can adjust the ploughs to distribute the sand better. I did do some upgrades to it recently but in general it works fine. I mulled up 100 pounds of petrobond sand this week and it was a breeze. Way better than getting down on your hands and knees and doing it by hand.
      Regards,
      Mark

  • @rosscairns6733
    @rosscairns6733 5 ปีที่แล้ว +3

    I love your order of operations - build a band saw to make a sand muller to produce a .......

  • @dale9896
    @dale9896 4 ปีที่แล้ว

    Simply awesome well done mate.

  • @Pest789
    @Pest789 5 ปีที่แล้ว

    I think you should add a little mouldboard style plow blade on another rod after the roller to flip the sand and force it outward to be picked back up by the other ploughs

  • @gregfeneis609
    @gregfeneis609 5 ปีที่แล้ว

    Very nice work, including the video.
    .

  • @jasongarland3165
    @jasongarland3165 5 ปีที่แล้ว

    The blue/brass name plate at the end is a nice touch. I think Luckgen1001 would approve of your muller as well

  • @JulianMakes
    @JulianMakes 5 ปีที่แล้ว

    Love this! I’m researching making my own muller at the moment, I’ve just over wetted my sand and it’s a nightmare (still trying to dry it). Love your plate at the end! Brilliantly made cheers (subbed plus bell obviously!)

  • @insAneTunA
    @insAneTunA 5 ปีที่แล้ว

    hahaha Great video! And what a beautiful makers tag :-) Serial 00001 :-) Your sand muller really deserved that tag. I think that your roller could use some groves, a bit similar like a helical gear, in order to get more grip on the sand, and it breaks up the sand easier because the edge from a grove creates much more pressure on a lump of sand when the sand goes underneath the roller. And it can also use some mini plows to stir up the sand a bit more, like other also suggested in their comments. But now I am looking forward to see the adjustments :-) Big thumbs up !

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      Thanks, I have to do some more work on it for sure but it's nice to have it running.

  • @chrismate2805
    @chrismate2805 5 ปีที่แล้ว

    Well done, liked the build. Regarding the roller how about consider adding resistance to the roller so the sand can grip and rotate it like a waterwheel, by adding /welding small round bars not sure if at angles around the outer circumference of the roller, and depending on the spacing, it hammers the sand clots down as it rotates on the will of the sand, maybe experimenting with maybe 7.... I guessing I think the distance between them will have to do with how the roller floats on the sand and next one to caught by the sand.......
    If they fit in a twisted manner the roller will run on drum without sand evenly, like a worm wheel effect.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Chris, I am definitely not an expert but I believe the job of the roller is less to do with compacting the sand and more to do with pressing the clay particles into intimate contact with the sand grains. The idea is to have each sand grain fully coated with clay. There is a point early on where you want to break up the hard lumps of dry greensand and reduce the mix to a free flowing dry mix. Then you add sufficient water to make it bind together. I have used the muller quite a bit just recently and I have sort of worked out the correct ratio of water to add. In the video you watched I definitely added too much water and it was making the mix too sticky. There's so much to learn with foundrywork and I am still on the upward trajectory of the learning curve. I can definitely say though that having a sand muller, even a bad one. is far better than getting down on your hands and knees and doing it by hand.
      Regards,
      Mark Presling

    • @chrismate2805
      @chrismate2805 5 ปีที่แล้ว

      Ok, I did not mean it must compact, i ssume that would not be good at that stage, on 2nd thoughts a larger roller may roll over the sand easier without acting like its pushing the sand. Hi, this is just a wild thought(s), I am no expert either.

  • @johnwp111
    @johnwp111 5 ปีที่แล้ว +1

    Mark, I find using a spray bottle to add water give better control.

  • @TgWags69
    @TgWags69 5 ปีที่แล้ว

    Oh no! You only taped the ends of the roller. Now you're going to have to sand off all that overspray....lol.
    Good job it looks great. Love the tag. Very finished look. I noticed the sand building up in the center. I remember Luckygens model did the same. I wondered then if a more scroll shape would work?A closed tear drop shape would be tempting, but would not have an exit for any sand inadvertently getting in there

    • @andyshap
      @andyshap 5 ปีที่แล้ว

      I figured he knew the sand would scrape any overspray right off.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      You got it!

    • @TgWags69
      @TgWags69 5 ปีที่แล้ว

      @@andyshap 👍it was a joke,

    • @andyshap
      @andyshap 5 ปีที่แล้ว

      I got the joke, just commenting. That's the trouble with any typed response, no facial features or body language to emphasize the remark.

    • @TgWags69
      @TgWags69 5 ปีที่แล้ว

      @@andyshap you are right. Even in person many people don't get my smart aleck, sarcastic, "dad humor" jokes. It's even harder in writing 😉

  • @CapeCodCNC
    @CapeCodCNC 5 ปีที่แล้ว

    Almost fell out of my chair laughing! Hey what is a Kooka? Maybe a couple of vertical rods just after the roller to break it up. Did you notice the grease cap pop up? Thing of beauty! Great job!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Yeah, that grease cap kept popping out. At first I thought it was the lock wire but eventually I drilled a very small hole in the side of the cap and it went it perfect. A kookaburra is a native Australian bird that has a call like someone laughing insanely. They are related to Kingfishers but are quite a bit larger. They have very sharp and powerful beaks and catch and eat snakes. We have a large population of them living around the bush on our property. If you ever watched Tarzan as a kid you would have heard their call used although they don't live in Africa. I guess the show's producers just decided that they sounded "exotic".
      Regards,
      Preso

  • @leethalvinylarrival4712
    @leethalvinylarrival4712 ปีที่แล้ว

    brilliant job

  • @johnnym1320
    @johnnym1320 5 ปีที่แล้ว

    nice job uncle Preso! how about a rake after the roller to help break up the lumps

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      I will have to mock up something and try it before I mess up my nice paint.

  • @AlbiesProductsOnline
    @AlbiesProductsOnline 5 ปีที่แล้ว

    I think if you skewed the roller slightly so it was rubbing and flattening the sand it mite help but you don’t have anything braking up the sand separating it with everything be pushing into a line and the roller just rolling on top the packed sand around the lumps are supporting them so there is not enough forces to brake anything up maybe some raking fingers

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Thanks. The idea of adding some fingers (tines) might be doable.

  • @docwu2k
    @docwu2k 5 ปีที่แล้ว

    Very nicely done!

  • @MaturePatriot
    @MaturePatriot 5 ปีที่แล้ว

    I thought those upside down spray guns were for use down under!! LOL - What type wood are you using for the handle? - You need to add a turning plow in the middle of the compacted sand to keep it turning to break up the lumps. - Great build, and I loved the Placard.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Vernon, the wood I used was Malaysian teak. It was offcuts from a job I did for a friend. They bought a double bed in Jakarta and wanted it converted to a king size bed. It looked like it had been recycled from some massive doors. The wood has a curious odour and grain that varies from cream right through to a really dark grey.

  • @joefalmo5528
    @joefalmo5528 5 ปีที่แล้ว

    Looks good it should make your casting a much easier process good job on this one Mark

  • @olivier2553
    @olivier2553 5 ปีที่แล้ว +1

    You need some rubber at the bottom pf your take/plough, so it will noy damage the bottom of your drum.

    • @olivier2553
      @olivier2553 5 ปีที่แล้ว

      And you may need one more plough, after the roller, in the path of the roller, to really plough the sand ans turn it upside down, like you did with your shovel when you tried to scoop the sand, Because the way it is, it created a nice thick and compacted track of sand, you need to break that.

  • @johnwhauserman
    @johnwhauserman 5 ปีที่แล้ว

    I love the plate to cover the holes.

  • @michelgrenier1878
    @michelgrenier1878 5 ปีที่แล้ว

    Better than store bought . Wonder if a second roller was added with bumps on it to break up those lumps ? Just an idea ! ; Great job on this project .

  • @1musicsearcher
    @1musicsearcher 5 ปีที่แล้ว

    That would sure work for me! Great project.

  • @TgWags69
    @TgWags69 5 ปีที่แล้ว

    On a bottom plow, the small blade on the coulter disc is called a skimmer. So I would vote for one of the three: mouldboard, plow, or skimmer

  • @bobvines00
    @bobvines00 5 ปีที่แล้ว

    Mark, Wonderful project! I enjoyed the humor too. Unlike Nicholas Stahl below, my wife _didn't_ walk in while I watched this video, so I'm safe. ;) As far as the plastic switch box goes, would the switch have fit if you removed the dinky bell assembly from it? Tareem Moaleji asked my first questions, so I won't repeat them. Do you think the screws holding the bar for the outer "plow" will prevent it from turning against the outer drum from the force of the sand? Especially wet sand?
    I'm looking forward to you using this "Kooka Muller" in future projects. Please keep us up-to-date on how well this works.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      I really cranked those screws down hard and they seem to hold the plough in place OK. I really did want to keep the little bell and i feel like the aluminium switch box was a better alternative. At least it won't shatter when I knock something over against the muller.

  • @johncloar1692
    @johncloar1692 5 ปีที่แล้ว

    Grate Project. Thanks for sharing!

  • @GreatOldOne
    @GreatOldOne 5 ปีที่แล้ว

    Nice. Quick question though... if you can’t hear the bell, and all you needed was a few mm to get it in the fully sealed enclosure, why not remove the bell?

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      I like the bell. It's a nostalgia thing, a longing for the times when household appliances had a soul!

  • @wazalee4872
    @wazalee4872 5 ปีที่แล้ว

    great work old mate, how would rake tines go just after the roller ? this with the center plow and outer plow will help to turn and mix your sand ? eg in your demo, you said might be to much sand and it compacting , this would fix that ?

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      I am going to have to do a lot more experimenting. Now that I have it running I am going to have to tackle some of the backlog of castings I have been putting off. As soon as I finished the muller I was off on another tangent and you will see where that goes shortly.
      Regards,
      Preso

  • @TheDeerInn
    @TheDeerInn 5 ปีที่แล้ว

    Very nice, when do you start mass production because you know everyone will want you to make them one. Love the music!!!

  • @richardgregory6653
    @richardgregory6653 5 ปีที่แล้ว

    Mark have you looked at roller in the shape of a cultipacker with less surface area for the lumps to float under the roller. just an idea. nice job!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Richard,
      I think I probably should not have called the roller a compactor. It's main job is to sort of iron out the lumps of sand and then grind the clay particles into close contact with the sand grains. A good greensand has sand crystals that are completely surrounded in a fine coating of clay. I understand that just mixing the clay through the sand is not enough to give a good strong greensand. I guess the action is more like grinding than compacting.
      Regards,
      Preso

    • @richardgregory6653
      @richardgregory6653 5 ปีที่แล้ว

      @@Preso58 the reasoning behind the cultipacker was to get roller to contact the clumps. I was a maint superintendant at a large vegetable oil refinery and we conveyed spent bleaching clay/diatomaceous earth to a rotary feeder that we fed into a boiler(coal fired)to burn up the residual vegetable oil as a fuel leaving only the fossilized material in the coal ash. we dealt with clumps stopping up the feeder. I designed and built a clump buster with a two row cultipacker (in appearance only)not to pack the clumps but break up the clumps as the two rollers were off set to break each clump. I realize what you are doing is not compacting just trying to return the sand back to its granular state. Just an Idea for thought. Enjoyed the project. ATB Richard

  • @charles1379
    @charles1379 5 ปีที่แล้ว

    Hi Mark,
    another though , on the great Muller you made.
    I notice that there is a central band of sand that remains between the two ploughs.
    what do you think about having the central plough pushing its share of the sand all the way across to the outside 1/3 so that the second plough folds this over, ensuring a good mix

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      I must say that I copied the muller that I saw Luckygen1001 detail on his channel. He is a bit of an Aussie foundry guru and I figured he knew what he was doing. I am currently on an overseas holiday and I have only used the muller once so I am still to see how effective it is. I am keen to do some more testing with it.

  • @LukePettit3dArtist
    @LukePettit3dArtist 5 ปีที่แล้ว

    Lovely job as always Mark you're a true craftsman.
    Couldn't you just have removed the "Bell", particularly as you said you doubt if you will hear it anyway?
    The term "Plow" is more than appropriate, it is an accurate and concise description of their use and role.
    The centre plow could just be taller/wider to solve having too much sand :-D
    I agree that a scraper on the roller might be useful along with some teeth on it as well to help break up the lumps.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Luke, I like the little bell. It's nostalgic. Modern appliances have no soul! I will need to do some tweaking with the operation of the muller. It will have to wait though. I am due to leave on a holiday overseas shortly.
      Regards,
      Preso

  • @aussie_Logic
    @aussie_Logic 5 ปีที่แล้ว

    you need to stir the roller track deposited sand so the roller did not just roll over it without effect.. so I suggest a scraper behind the wheel to stir the sand

  • @henrikhv5084
    @henrikhv5084 5 ปีที่แล้ว

    Sir. That was great :-) like to see a follow up in a month or two ;-)

  • @mgmoody42
    @mgmoody42 ปีที่แล้ว

    Mark, this just showed up in my feed from ~4 years ago. Is there anything you would have done differently now if you had to build this muller again today?

    • @Preso58
      @Preso58  ปีที่แล้ว +1

      I did change out the plywood pulley to a shop made aluminium one machined from a solid billet and I also added a cam type belt tensioner between the motor pulley and the drum pulley. This was the biggest improvement. Prior to that I had to tension the belt often. Now I can use the cam to get the belt tight and just lock the motor in place. I also added sealed ball bearings to the roller. Other than that it has pretty much stayed the same.
      Regards,
      Mark

  • @garymucher9590
    @garymucher9590 5 ปีที่แล้ว

    Could install a ramp plate to make the sand lift up and drop down getting it broken up like you did with the shovel. Nice buid, but I wouldn't have any use for it myself. Don't do casting ...yet! Thumbs Up!

  • @charles1379
    @charles1379 5 ปีที่แล้ว

    Hi Mark,
    I just came across your channel. I am very happy with the presentation.
    Where are you based in Australia??
    in regard to the central plough, should that not start at the centre of the bowl so that it rakes out the whole sand load??

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Charles, I live on the Sunshine Coast in Queensland, We are about 20 minutes from Noosa. I don't find the void in the centre plough to be a problem. If any sand does get in there you just sweep it out with your hand (being conscious of WH&S of courese) and it stays out.

  • @kenny5174
    @kenny5174 5 ปีที่แล้ว

    Great job! Kooka Muller, Kookie builder!

  • @OldIronShops
    @OldIronShops 5 ปีที่แล้ว +1

    Very nice how much to order serial number two

  • @homemadetools
    @homemadetools 5 ปีที่แล้ว +1

    Excellent!

  • @dan5her
    @dan5her 5 ปีที่แล้ว

    Hey mark, can I get your advice?
    Looking at making green sand, but the only bentonite I can get my hands on easily has Zeolite and Spongolite in it, do you think it would still be safe and effective to use?
    Cheers

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      DSRMoto, I have never worked with those additives before. I guess you could just try it. I got my bentonite from a rural supply centre. It is sold as an additive to fix leaking earth dams. If the greensand holds together when you squeeze it in your hand without sticking it should do the job. From what I understand both the additives are organic and derived from natural sources so they shouldn't be toxic when heated.
      Regards,
      Preso

    • @dan5her
      @dan5her 5 ปีที่แล้ว

      @@Preso58 cheers mate, enjoy your holiday!

  • @dan5her
    @dan5her 5 ปีที่แล้ว

    Hey presso
    Random question, do you think yellow brickies sand would be ok as a base for greensand? I cant think of anything "off the shelf" that's finer

    • @Preso58
      @Preso58  5 ปีที่แล้ว +1

      I have never tried it. Apparently, some sands have enough clay content in them to use as greensand without any extra bentonite clay.If it were me I would just try it as it comes and see if it will hold the shape of the mould. I know that Myfordboy and Olfoundryman use natrual clay bearing sands just as they come out of the ground.

  • @just_a_guy_doing
    @just_a_guy_doing 5 ปีที่แล้ว

    Mark, being a shop teacher (aka industrial arts, later renamed technology education) I'm curious to know what you taught and what grade level you taught at. I teach high school, grade 9 through 12.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      DIY Chad, I taught years 8 through 12. The subject names changed over the years but it was mainly woodworking, metalworking and graphics. For political reasons, over the past 18 years or so, high schools in Queensland were encouraged to teach vocational subjects (VET) which would normally have been delivered by TAFE (Technical and Further Education) The TAFE colleges used to take students from year 10 through 12 and prepare them for apprenticeships. In the high school we could deliver up to certificate 2 level in areas like engineering (fancy name for metal machining and fabrication) Furnishing (woodwork) and construction. Our curriculum was effectively dumbed down in favour of the VET subjects. In the year I retired the school cancelled the Senior Graphics programme which another teacher and I built up over many years. It was a board subject meaning it counted towards a students university entrance score and it was technical, challenging and I thought, engaging. The assessment and reporting load was fairly intense but I relished the challenge. It also allowed us access to higher calibre students who were looking to go on to engineering, architecture and graphic design. In the VET subjects there was no assessment other than determining whether a student was "competent" or "not competent". Students realised that they only had to do the bare minimum to achieve competency and there was no incentive to work harder than that. Having said that I really enjoyed teaching the younger students. Year 8's were especially rewarding. We only had them for one term and the best we could do was to teach them some basic woodwork, metal and plastics skills. So the turnover was high but the good thing was that you weren't stuck with kids with challenging behaviour for more than 10 weeks. The biggest problem we faced towards the end of my career was the steady increase in class sizes. We had workshops with 24 bench spaces but we were continually given class lists with 28, 29 and 30 students. The rationale was that there would always be a few kids away! The administration would rarely get out of their offices to see what was really going on and I made a nuisance of myself inviting them to come to my classroom to see what it was really like. I knew I was retiring and so had nothing to lose. It made no difference though. I could see the writing on the wall and decided it was time to go. I still go to the school sometimes just to say hello and I do miss the teaching. I was just fed up with the peanuts who were running the show. The one thing that I found quite late in my career which I was really sad to leave was the F1 in Schools programme. It is a STEM programme which is run worldwide and delivered in Australia by a not for profit company called Re-Engineering Australia. I started with the programme in 2004 as a complete novice and for the first year I had no idea what I was doing but we slowly gained some traction and made it to the national finals the following year. We won our racing class but for organisational reasons did not get a spot at the World Championships. One of my students did get invited to form a team with a female student from another school and competed in London but his poor old teacher (me) did not get a spot. That came in 2009 when I took a team to London where we competed as a collaboration team consisting of four Australian students and two Canadians from Winnipeg, Manitoba. We took first place in the collaboration class and came third outright in the world. The students had to design, manufacture and race a small model formula one car which was CNC machined from balsa wood and powered by a CO2 gas cylinder. It is raced on a 20 metre raised track, slot car style, and started and timed electronically. They cover the 20 metres in around 1 second. They also have to write a design folio, set up a pit display, deliver an 8 minute verbal presentation and collaborate with industry. My son was on that team and the experience has helped him get a job with an advanced innovation and manufacturing company in Wellington, New Zealand. At the competition we also got to meet Lewis Hamilton and we were guests of the McLaren F1 team and the Red Bull team. We toured their factories and met many of their engineers.
      It was a great programme but it was like taking a second, unpaid job alongside my normal teaching, reporting and assessment load. There were many days when I would get home at 4pm, have a cup of tea and dinner and then work from 8pm until 2am. I don't regret any of it though. As a teacher, I am sure you have projects or programmes that you are passionate about so you will understand. Sorry about this rather long winded reply but I always find it fascinating to hear what teachers in other parts do and what their working conditions are like. The teacher I worked with from Winnipeg was a great guy and it was interesting that the system in Canada and Australia were so similar.
      Regards,
      Mark Presling

  • @christophercullen1236
    @christophercullen1236 5 ปีที่แล้ว

    Would a scraper on the roller be beneficial?

  • @popo5413
    @popo5413 3 ปีที่แล้ว

    MM maybe if you rolled to the top over the outer plow (like an earth farm plow) and readjusted it that could maybe better ?? or not :)

    • @Preso58
      @Preso58  3 ปีที่แล้ว

      That would be ideal but it seemed like a real challenge to get such a 3D shape without blacksmithing tools. I recently did some upgrades to the muller and I am hoping to do a video on that soon.
      Regards,
      Mark

    • @popo5413
      @popo5413 3 ปีที่แล้ว

      @@Preso58 cool sorry about the grammar I think my brain needs blacksmithing :)

  • @jonknight9048
    @jonknight9048 5 ปีที่แล้ว

    What brand powder coating set up do you have? I have started looking for one

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      I use the Eastwood powder coat gun kit. It came with some sample powders, some silicone plugs, some heat proof masking tape and a spare powder container. It's a nice compact and easy to use gun but I had to purchase a step down transformer (240V to 110V) since the Eastwood gun is made in the USA.
      If I was going to buy it again I would get the dual voltage gun. It performs a bit better when you have to shoot powder into narrow gaps and tight spaces.
      Regards,
      Preso

  • @chrisleech1565
    @chrisleech1565 5 ปีที่แล้ว

    You're a hard act to follow Mark.

  • @GuyBarry1
    @GuyBarry1 5 ปีที่แล้ว

    Couldn't have milled out 2mm from the inside of the plastic box?

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Maybe, but in hindsight I like the way the aluminium housing looks and feels. It sort of looks the part if you know what i mean.

  • @ElectriciScreen
    @ElectriciScreen 5 ปีที่แล้ว

    Perhaps a squirt/spray bottle for moisturizing the sand .

  • @scruffy6151
    @scruffy6151 4 ปีที่แล้ว

    But, of course a name tag to finish the build.
    Looks like it will do just fine.

    • @Preso58
      @Preso58  4 ปีที่แล้ว

      Surprisingly, it's one of the few home built machines that worked right out of the box. I don't regret spending the time and money on it. I'm too old to be on my knees squishing up lumps of sand with my bare hands.
      Regards,
      Mark

  • @craigtreleaven7560
    @craigtreleaven7560 5 ปีที่แล้ว

    Spokeshave action!

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Sadly, an underrated tool in many workshops.

  • @johnwilimczyk4188
    @johnwilimczyk4188 5 ปีที่แล้ว

    you should have put a pivot in the carriage to tip the sand into a bin to empty save your back on shoveling it out

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      It would certainly make it easier to get the sand out but there would be a lot of complication for the build.

  • @MoraFermi
    @MoraFermi 5 ปีที่แล้ว +1

    "People panic when there's metal anywhere near mains voltage" -- How about inside the wires?

  • @nikoniko3037
    @nikoniko3037 ปีที่แล้ว

    Isn't the sand oil based?

    • @Preso58
      @Preso58  ปีที่แล้ว

      No, I was using greensand. It looks a bit like petrobond but it's just regular fine sand and bentonite clay.
      Regards,
      Mark

  • @garagemonkeysan
    @garagemonkeysan 5 ปีที่แล้ว

    Great video. Awesome fit and finish on the project. Free Lemons Today? Are Lemons being wrongfully imprisoned somewhere? : ) Cheers.

    • @Preso58
      @Preso58  5 ปีที่แล้ว

      Ha Ha! I like that!

  • @MrPanchoak
    @MrPanchoak 5 ปีที่แล้ว

    Id have put a bottom scraper right behind the roller

  • @richards6452
    @richards6452 5 ปีที่แล้ว

    Bravo!!

  • @andermma
    @andermma 5 ปีที่แล้ว

    hi, nice job - you should look at luckygen1001 Sand mixer and mixing sand he has a muller like what you made and has some good info on the operation of it - be careful get sucked in and it will rip off you arm and mix it into the sand and no way to stop it.....