metal casting machine, perfect molds every time.

  • Published on Oct 29, 2021
  • a machine i made for making sand molds for metal casting. perfect molds evry time.
  • Science & TechnologyScience & Technology

Comments • 160

  • Henry Dando Engineering
    Henry Dando Engineering 5 months ago +21

    wow this setup is amazing. probably would work for semi-mass production!

  • CuriousEarthMan
    CuriousEarthMan 2 months ago +1

    I wish I had seen this years ago! Thank you for the simple, straightforward, concise exposition of the art!

  • MapBot
    MapBot 2 months ago +2

    Cool homemade setup for a home shop. I used to work in a DisaMatic foundry and those high production machines are incredible to watch. We had some patterns that would produce 30 pieces and it would take about 6 seconds to make a mold.

  • Mark Presling
    Mark Presling 5 months ago +31

    What a great set-up. It's really impressive. Are you using oil bound sand?

    • cringle engineering
      cringle engineering  2 months ago +3

      @Spixy cat i have had a lot of questions regarding the oil sand so i will make a video showing the whole process of using the sand soon. Just waiting untill i can purchase some new sand as it would be usfull to show in the video.

    • Spixy cat
      Spixy cat 2 months ago +2

      @cringle engineering can you do a video just on the sand? What you use, how long to dry, stategy for using vents etc aimed for people like me that have no knowledge at all about casting?

    • cringle engineering
      cringle engineering  5 months ago +19

      Thank you, yes i only use oil bonded sand (mansbond) it gives great detail and does not require venting or daily tempering.

  • Collin Smith
    Collin Smith 4 months ago +15

    Awesome setup...very cool! Looks like you’ve got this process nailed! 👍

  • giorgio canal
    giorgio canal 3 months ago +3

    Great job. Simple and effective machines. That's engineering!

  • Beerbatter
    Beerbatter 2 months ago +1

    Nice setup, equipment, and process. You do good work. The only thing I could think of to make it even better would be to have the excess sand during mold prep go or fall back into the mixer so it just keeps recirculating. Since mixer is large and probably wouldn't fit well under the press for gravity return, maybe a simple conveyor belt. Anyway, I love to brainstorm, lol. Cheers.

    • Beerbatter
      Beerbatter 2 months ago +2

      @cringle engineering yeah, I totally get it. One improvement at a time as it makes economic sense. When the time comes though, with your skills I'm sure you could build a simple conveyor out of mostly found parts.

    • cringle engineering
      cringle engineering  2 months ago +1

      Thanks, im still working on automating as much of the sand moving as posible to save my back and a sand return conveyor would be great but just not worth the investment currently.

  • The East Man
    The East Man 2 months ago +3

    Very nice setup, very well planned and executed; good show. Tell me, where does your extra sand go? I'd also love to see a casting. Thanks.

    • cringle engineering
      cringle engineering  2 months ago +1

      Thank you, the excess sand falls into the large yellow bucket seen under the bencth and is emptied back into the hopper feeder manually. The results of these molds can be seen in my other video..
      I will add more casting videos soon, thanks for watching.

  • zpinacz
    zpinacz 2 months ago +1

    Great workshop setup and great video editing skills. Pleasure to watch. Thanks ! :)

  • Jakob Halskov
    Jakob Halskov 3 months ago +4

    Super cool setup you got! And Very inspiring :) I do some hobby metal casting myself and would not fit such a setup yet; hope you will check out some of my content 🙏🏻

    • cringle engineering
      cringle engineering  3 months ago

      Thanks, its only realy practical for small scall production casting of multiple parts. Il check out more of your videos, il like the bottle lamp been thinking of making somthing simular for my workshop.

  • Matt Probst
    Matt Probst 2 months ago +1

    Sir, I applaud your thoroughness of the whole process. Very well done design and execution.

  • Olfoundryman
    Olfoundryman 4 months ago +3

    OMG! Dowel pins with threads. Now I have seen everything.
    8 minutes a box - not bad. But with small moulds and a nice little pattern plate like that I reckon that in my heyday (long since gone) I could have equalled and maybe even beaten that. Possibly to 6 or 7 minutes a mould and I would have sieved the first sand to improve finish and moulded in a proper tapered sprue. But to show you just how slow we both are I have a book - “Foundry Practice” by R H Palmer, published about 1911, that has a time study. Its for a 13 inch by 17 inch mould with a 4 inch high drag and 4.5 inch high cope so it’s a much bigger mould with lots more sand. Entirely hand moulded 4 minutes 20 seconds and machine (power squeezer) moulded 2 minutes 10 seconds. Now that is moving - those old timers really worked, doing that for 12 hours a day 6 days a week, no wonder they did not live long!... Martin
    PS What do you use to convey the sand upwards?

    • cringle engineering
      cringle engineering  4 months ago +2

      I only use oil bonded sand (mansbond) it costs a lot more initially but it gives a very fine finish much better than regular green sand. And it needs no venting at all! Ive just seen your video on how you rework your sand! Wow thats a lot of hard work! and exactly the reason i made this sytem and only use oil sand now.
      My machine lifts the sand with an arcamedes screw from the hopper and works it to a very fine fluffy techture when it drop down, and so does away with having to grate it through a sieve so saves a ton of work.
      I then just wait untill the molds are cold in the morning open them on a shake out table with a grate on top and into my muller that is simply a cement mixer with 3 6inch iron balls rolling inside it. I still have to shovel the sand from the muller to the feed hopper but that the last bit to mechanise.
      And yes exactly what you say, Im 35 and get a sore back already and will probably need to work for another 40 years before i can think of retirering lol.

  • Jerbo 1
    Jerbo 1 2 months ago +1

    I was like ok, this is pretty slick, then the pneumatic lifter blew my mind. Very clever.

  • Michel Aubut
    Michel Aubut 2 months ago +1

    Awesome! Simple design! Quick process! I can see that the sand is pushed into the pipe using the hole in the bucket but what did you use for pushing the sand all the way up into the pipe?

    • cringle engineering
      cringle engineering  2 months ago +2

      Thank you, the sand is forced up elevator with a arcamedes screw inside the pipe. This has its own motor(the large green one under the hopper at begining of video) the second motor drives the stiring bars to keep the sand from sticking in the hopper. Bothe are operated from the same foot pedle when switched on.

  • 37yearsofanything isenough

    I always carve a pouring basin on the top of the cope. I never pour directly down a spruce. It does things such as final filter of impurities and obviously slows the metal speed down like rip rap in a ditch. We were all taught this by one of the finest foundry men in the business, Dr. Paul Spidel of UW-Stout. You might want to include this in your repertoire.

    • cringle engineering
      cringle engineering  2 months ago

      I have tried adding a basin but i have found i just dont need to bother. I can controll any inclusions via speed of pour so air cant enter, and using sacrificial risers to remove any turbulance and trap oxide and slag from entering the runner and gates.

  • TheYerko42
    TheYerko42 2 months ago +1

    This set up is blowing my minds! awesome work!

  • S Duka
    S Duka 2 months ago +3

    Impressive! it seems so accurate. How do you get the sand to hold so well? Is it mixed with some kind of adhesive? And also do you reuse the same sand?

    • S Duka
      S Duka 2 months ago +1

      @cringle engineering thanks a lot

    • cringle engineering
      cringle engineering  2 months ago +8

      Thank you. I just use oil bonded sand (mansbond is the brand i use), it is very fine and sticky almost clay like when new. I just add a little mineral oil when mixing before reuse and top up with new. Its not cheep at around £50 for a 25kg bag but i would highly recomend it. It saves lots of time tempering sand and no need to vent at all and i dont have to wait for the sand to go stone cold before using again. One bag should be more than enougth for hobby use and would last a life time.

  • JB Lauzon
    JB Lauzon 4 months ago +3

    Looks great ! Wonder what the setup would cost tho. Could be great in my shop!

  • Robert Palmore
    Robert Palmore 2 months ago +1

    Part of the reason for your perfect molds is your perfect pattern. Really good job. You really cut down on secondary work by putting in your runners, well and sprue locations. Just have to complete the sprue and your off and running. Very good.

    • cringle engineering
      cringle engineering  2 months ago

      Thank you, im still learning a lot about pattern design, the machplates realy do speed things up when making multiple parts so there well worth the investment to me.

  • Golden Delta
    Golden Delta 5 months ago

    What would you think about casting framing members like the subfloor joist systems as a solid single piece using this technique to save labor costs and create a template for mass production rather than individual casting and assembling?

    • cringle engineering
      cringle engineering  5 months ago +1

      Hi i googled a bit but Im not realy sure what you meen? But most small metal parts can be produced with this setup using matchplate patterns.

  • Sparker Q
    Sparker Q 4 months ago +2

    Killer set up! would love to see the pattern for your cope and drag elements! :)

    • cringle engineering
      cringle engineering  4 months ago +1

      @Collin Smith il get some done soon, il also have to make a bigger furnace to fit bigger crucibles.

    • Collin Smith
      Collin Smith 4 months ago +2

      @cringle engineering I’d love to see it!

    • cringle engineering
      cringle engineering  4 months ago +1

      Thanks i may record a video when i make more flasks someday.

  • Michael Mendoza
    Michael Mendoza 2 months ago +1

    Honestly, the best setup I've ever seen on TheXvid.

  • creast
    creast 6 months ago +2

    Very impressive setup!

  • Chris Wade
    Chris Wade 2 months ago +1

    The machine is very impressive. I stuck around until the end of the video because I thought you would pour some molten metal. Still a great video. Do you feel like the machine was worth all the trouble to build, still today?

    • cringle engineering
      cringle engineering  2 months ago +2

      Thank you, i will make more casting videos soon. For me the machine was worth the investment as it is somthing that gets used daily, It takes a lot of effort and skill out of the job and it is useable by anyone with little training so i can easily get somone to operate for me. I would never have bothered if just for hobby use, but the mold ejection is the single best feature that improved results the most.

  • Rupert 53
    Rupert 53 5 months ago +2

    What a brilliant setup, the best (excluding commercial operations) on utube, did you cast your own casting boxes?

    • cringle engineering
      cringle engineering  5 months ago +2

      Thank you. yes i made the box's before i made the machine. The machine i based on a jolt and squeeze type machines seen on utube.

  • Lord Bacon III
    Lord Bacon III 3 months ago +1

    This is the most satisfying thing I've ever seen. Meanwhile I have one fold out table and a big ol bucket of sand 😁

  • bagok701
    bagok701 2 months ago +2

    I'm a bit new. With your setup for separating the two halves why not have an automated cutter for the sprue? 4:58 (I think sprue is the term?)
    Also while automagically cutting the sprue why not run something like a step drill bit to create your funnel? this might reduce your process from a 7 min to a 5 min by automating more of the work, reducing tool changes, and work location changes.

    • cringle engineering
      cringle engineering  2 months ago +1

      As with most things its all down to time and funds, ive spent the time and money i have available and this was the result. Im sure could design a better even more automated system. I couldnt think of a cost effective way to automate the sprue cutting as each different pattern has different hole locations and at the end of the day its a matter of seconds and im more focused on removing the more labour intensive aspects for now. Thanks for watching.

  • WeirdscienceTV
    WeirdscienceTV 2 months ago +1

    This is extremely clever. Subscribed!

  • DK Ironworks
    DK Ironworks 4 months ago +1

    All the high end equipment to go to a copper pipe and table spoon. Love it.

  • BlueSwallowAircraft
    BlueSwallowAircraft 2 months ago +1

    Very nicely done. Can you share the pressure you run your air rammer? I have felt for some time it would be worth building one for my casting business.

    • Bob Weiram
      Bob Weiram 2 months ago

      Can't you use one of those air hammer or palm hammers you find at harbor freight? You could also use a few of the palm hammers attached under a flat surface to agitate the mold.

    • cringle engineering
      cringle engineering  2 months ago +1

      The mold squeeze and jolt section just runs direct from the compresser thats set around i think 85psi, the top cylinder is 50mm diameter and the bottom 65mm for the jolt bit. The mold spliter and blower are regulated.

  • emseebe
    emseebe 3 months ago +1

    This is just genius!

  • G Quizzle
    G Quizzle 2 months ago +1

    My mouth hit the floor. What an awesome setup man.

  • brian medina
    brian medina 2 months ago +1

    Fantastic engineering

  • Subinspect tom
    Subinspect tom 3 months ago +1

    Amazing machine.

  • The Foundry Room
    The Foundry Room 3 months ago +2

    I love this setup!

  • Tobho Mott
    Tobho Mott 4 months ago +2

    Very impressive setup!

  • Wildman Tech
    Wildman Tech 2 months ago +1

    Well done! Bravo!!!

  • Mosisa Mesfin
    Mosisa Mesfin 4 months ago +1

    Hello, how did you make it?
    Do you have any contact for further information inquiries?

    • cringle engineering
      cringle engineering  4 months ago +1

      Hi, the machine is quite simple, just a steel frame welded together and simple pnematics all sorced from ebay. The hopper/feeder was second hand from a factory used for moving grains.

  • gordon6029
    gordon6029 5 months ago +1

    What a sweet set up!

  • Jack Williams
    Jack Williams 2 months ago +1

    The YT Algo must've randomly decided I watch a sand casting video... The funny thing is, I did some of this, years ago in another life. The process you've put together is fantastic. I could see how it would lead to consistent quality casts every time. Great job. Now back to regularly scheduled programming....

  • wantafastz28
    wantafastz28 3 months ago +1

    Well done.

  • Hot Metal Knives HMK
    Hot Metal Knives HMK 2 months ago +1


  • Gabriel Pierri Knives
    Gabriel Pierri Knives 2 months ago +1

    Amazing system brother

  • TheBussaca
    TheBussaca 2 months ago +1

    where do you get your mould boxes?

  • 4nines Fine silver
    4nines Fine silver 2 months ago +1

    Very professional work. Any chance of telling me the recipe for your sand

    • cringle engineering
      cringle engineering  2 months ago

      I have tried making my own but with not much success im afraid.

    • 4nines Fine silver
      4nines Fine silver 2 months ago +1

      @cringle engineering thank you I was hoping you mixed your own 👍

    • cringle engineering
      cringle engineering  2 months ago

      Thank you, i just use oil bonded sand, mansbond is the brand i buy in 25kg bags.

  • gedion4000
    gedion4000 2 months ago +2

    this is pretty neat, but what for of material are you ucing for the pattern? Even if that was steel, i would think you would get some sort of deflection in it from compacting the sand since it isnt sitting on a flat base and just sandwhiched in. i know you cant get perfect tollerance in these molds, but how are these parts dimensionally?

    • cringle engineering
      cringle engineering  2 months ago +1

      Thanks, my patterns are mostly 3d printed plastic on plywood(see my other video on making of the matchplates) there will be some spring in the patterns but only a fraction of a milimeter probably less than the thickness of the paint so realy no isue at all. Ive been told many times my castings are nicer than most other available casting kits so im more than pleased with the results.

  • SashaXXY
    SashaXXY 3 months ago +1

    Wow! Cool!

  • Roscoe Pattern Works
    Roscoe Pattern Works 3 months ago +1

    Not to make you feel bad but we had a molder named big Jim. He asked th boss if he could take off at lunch with full days pay if he got 125 14x16 molds done. The boss said sure, as he laughs. Well big Jim went home at lunch with full pay. He was using 2 hands flipping a 14x16x8 deep flask, full of sand with just his wrists. Now you have a goal😁💪
    Great job by the way.

    • Roscoe Pattern Works
      Roscoe Pattern Works 3 months ago +1

      @cringle engineering i have the same moto.
      Pretty sure his back regretted it for a long time, I'm 72 that makes Jim about 85. Heck of a guy.

    • cringle engineering
      cringle engineering  3 months ago +2

      Job and knock always helps production! I met simular lads working in an abotour, 250 cows and go home! But i bet big jims back regrets it now, il bet he also got a wage that afforded him a pension and house. Work smarter not harder is my moto :)

  • Leon Kiddell
    Leon Kiddell 2 months ago +1

    Probably best not let the work-experience lad use it though, that pneumatic ram looks like a great way to get a smooshed hand! the biggest benefit that i can see is the sand delivery system, there's a lot of time used up in scooping sand. the biggest downside that i can see is that you're restricted to using a single size of flask, but there's also something to be said for standardizing on a single size!

    • cringle engineering
      cringle engineering  2 months ago

      Ah yes if i do get an apprentice i would have to make it with a second switch so both hands have to be clear of the table to opperate it.
      It does save a lot of effort moving sand and did away with having to seive also. The mold spliter actually improved results the most the rest just saves labour and speeds production.

  • Dick Sargent
    Dick Sargent 2 months ago +1

    Wonderful set up ! But it only works with one size of flask and match board.

    • cringle engineering
      cringle engineering  2 months ago

      Thanks, yes i use the same size flask and matchplates for most of the parts i make, it can fill and ram a larger flask but the spliter only works for the flasks i make.

  • GlueTubber
    GlueTubber 2 months ago +1


  • Robert Forrester
    Robert Forrester 2 months ago +1

    Just plain old good work Brother. Thanks from Philly

  • Steve Delacruz
    Steve Delacruz 2 months ago +1

    Wow the mixer machine ..ive built these before only bigger

  • Tony Saxer
    Tony Saxer 3 months ago +1

    Reminds me of a movie by Jaques Tati called Mon Oncle ...same sound effects 🤣👍👍👍

  • Ian Larcher
    Ian Larcher 2 months ago +1


  • dantech1
    dantech1 2 months ago +1

    Good idea, but you are limited to that size casting box.

  • Raw Bacon
    Raw Bacon 2 months ago +1

    The humble spoon comes to the rescue.

  • Eldormen
    Eldormen 2 months ago +1

    what psi do you have on the air hose, to not blow to hard?

    • cringle engineering
      cringle engineering  2 months ago

      It is set very low, just a few psi, it sounds louder in the video

  • Justin Blake
    Justin Blake 2 months ago +1

    That is the most elaborate setup I have ever seen. Most commercial setups don't even have any hydraulics and you have a dedicated one just to lift one mold off the other. There must have been a sale on hydraulic rams.

    • cringle engineering
      cringle engineering  2 months ago +1

      Its based on a jolt/squeeze machine, very comon simple machines used in most small foudrys. Most factories ive worked in do infact use lots of hydraulics and heavy machinery.
      For my machine i just used cheep pneumatic/air cylinders from ebay and a stick welder.
      It gets used daily so its worth the investment to me, and asking somone to work on the floor with bare feet is just unacceptable here.

  • sam yeates
    sam yeates 2 months ago +1

    Thanks for sharing!

  • BlakOrkk
    BlakOrkk 2 months ago +1

    Your setup feels like cheating compared to all the molds I've made by hand :D

    • cringle engineering
      cringle engineering  2 months ago +1

      It does save a lot of time, effort and skill, but only because i invest all the hours into making the matchplate patterns instead.

  • philipp594
    philipp594 2 months ago +1

    How does the portioning / propelling of the sand work?

  • mafosa
    mafosa 2 months ago +1

    awwwww... i thought we were going to see it threw the process..
    this.. was riveting to watch!

    • cringle engineering
      cringle engineering  2 months ago

      Thanks for watching, please see my other video on making a model engine part 2 for the results.

  • HEGL .T
    HEGL .T 2 months ago +1

    me at the company: needs to precision machine the sprue
    you: haha Spoon

    • cringle engineering
      cringle engineering  2 months ago

      ive had that same spoon for about 6 years! Lol. Still havnt thought of a better tool yet.

  • Michael Mendoza
    Michael Mendoza 2 months ago +1

    Yo, how much for you to build this set up?

    • cringle engineering
      cringle engineering  2 months ago

      Probably around £1k Including the compressor and all the parts and steel. Not including the hours spend designing and building it myself.

  • frederic wizz
    frederic wizz 2 months ago +1

    you are amazing

  • thetinguy
    thetinguy 2 months ago +1

    pretty slick

  • Buzzme
    Buzzme 2 months ago +1

    Hi I have a small project you can do or if you know someone who can do it for me. let me know. Its for a kitchen sink strainer. I have the mold. Its on 3" round by 1/4 thick

    • cringle engineering
      cringle engineering  2 months ago

      Sound like somthing i could do, but i have way to many projects waiting there turn at the min.

    WHEN HAKEM Month ago

    What sand you use??

  • oetken007
    oetken007 2 months ago +1

    Nice thing but very loud.

  • Adirondack Car & Foundry
    Adirondack Car & Foundry 3 months ago +1

    Would you be willing to sell me a few of those lovely aluminum flasks?

    • Adirondack Car & Foundry
      Adirondack Car & Foundry 3 months ago

      @cringle engineering cheers

    • cringle engineering
      cringle engineering  3 months ago +2

      @Adirondack Car & Foundry they are 3d printed patterns, i can share the stl files for them.

    • Adirondack Car & Foundry
      Adirondack Car & Foundry 3 months ago +1

      @cringle engineering Are they 3D printed patterns, or wood? I'd wager my shed is a bit far from yours? Cheers.

    • cringle engineering
      cringle engineering  3 months ago

      Thanks, but i just dont think il have the time, i could do with making more for myself. I can share my patterns for them if you fancy making your own? There quite simple to assemble just need a good file, drill and tap but quite time consuming!

  • Art Music
    Art Music 2 months ago +1

    Nifty. Thanks

  • henmich
    henmich 2 months ago +1

    1:58 RIP my ears... May they rest in peace. They had a good run... At least I don't have to suffer through Chris Isaak anymore when it's on the radio... The audio from this video went sort of like this...

    • henmich
      henmich 2 months ago +1

      @cringle engineering lol

    • cringle engineering
      cringle engineering  2 months ago +1

      Sorry this is the first video i made, probably a bit of a shock if you just been watching myfordboy listening to the birds and wind in the trees.

  • tre bushett
    tre bushett 2 months ago +1

    Just the type of set-up the locals could use in pak & india, would speed-up their production by at least 0.1 times.

    • cringle engineering
      cringle engineering  2 months ago

      Those guys are super impressive to watch! how they can make do with with very little and using there feet to ram the molds they make it look easy.

  • andybaldman
    andybaldman 2 months ago

    Seems like a lot of work for a home hobby setup. All that fancy stuff only benefits you if you’re doing volume.

  • Виктор Токарев


  • gfodale
    gfodale 2 months ago +1

    such a drag..... yet you cope well.

  • Glurgi
    Glurgi 2 months ago +3

    Nice setup, but you can't just put us through all that and don't show us the pour and end result :(

    • Glurgi
      Glurgi 2 months ago +2

      @cringle engineering Thanks for link, they came out really nice :)

    • cringle engineering
      cringle engineering  2 months ago +1

      Sorry, was just to show the machine working. You can see the results of this mold in my other

  • Other World Explorers
    Other World Explorers 2 months ago +2

    Heard the siren in the video..
    Thought my ride was here.

  • Mac Oppy
    Mac Oppy 2 months ago

    Ok. I'm sold. How much to buy the mold setup from you? Is there a better way to communicate with you other than YT comments?

    ДЭРМИ 4 months ago

    why just order the steel molds?

  • Toby Gathergood
    Toby Gathergood 2 months ago +1

    Oooo...Me likee Cringle Engineering!

  • gilbert t waterfield
    gilbert t waterfield 23 days ago

    Is this casting for Aluminum or for cast-iron

    • gilbert t waterfield
      gilbert t waterfield 23 days ago

      Yeah I know the crucible is the issue for all cast iron I think a 15 or 20 max pour after that you're a crucible it is very weak also it shrinks it to lose his height and a good crucible is not cheap

    • cringle engineering
      cringle engineering  23 days ago

      @gilbert t waterfield thanks, i can do cast iron with the same setup, and it gives a realy nice finish, but it realy burns out crucibles and destroys my oil sand in no time so i prefer to use bronze.

    • gilbert t waterfield
      gilbert t waterfield 23 days ago +1

      OK thank you and then your casting procedure is good for soft metals cause I don't think it would work for cast-iron cast iron is like a weird metal to work with it's finicky if you ever have a chance of making a video with the cast iron I would love to see it how it turns out thank you for replying and all the best luck to you

    • cringle engineering
      cringle engineering  23 days ago

      Bronze was used for this mold

  • jai ivanoff
    jai ivanoff 2 months ago +1

    the tea lady wants her spoon back

  • Bigwingrider1800
    Bigwingrider1800 2 months ago +1

    Look at you, very nice...

  • Minh Trieu
    Minh Trieu 2 months ago

    Really what's the point of this machine? To dispose sand and a hammer?

    • cringle engineering
      cringle engineering  2 months ago +1

      I first designed the machine so an unskilled old drunk man could operate it easily. It also obviously speeds up production and improves results and removes physical labour!??

  • felderup
    felderup 2 months ago +1

    next to add a vac bagger.

    • felderup
      felderup 2 months ago +1

      @cringle engineering a while back i read about some companies using vac bagging to pack the sand instead of pounding it. vac a sheet of plastic on the open sides of the flask. they'd talked about using it on the parting face too for a better finish, so, vac the pattern separately then vac it to the flask? it was a while back though, so i dunno, it was said it was used in production already... gotta be more than 20 years now.
      however, vaccing the patterns might mean you don't need to make a cloud of parting dust when you prep them and any benefits to the surface of the part would be gained.

    • cringle engineering
      cringle engineering  2 months ago

      How would you use a vac bagger?

  • marlon glodo
    marlon glodo 2 months ago +1

    hi sir why your sand is black?

    • marlon glodo
      marlon glodo 2 months ago +1

      @cringle engineering oh you are petrobond, thank you sir

    • cringle engineering
      cringle engineering  2 months ago

      Hi, the oil in the sand gets burnt around the casting and eventually goes black with soot/carbod. It is red in color when new.

  • Marcio Mila
    Marcio Mila 4 months ago +1