Cast Concrete with REUSABLE 3D Printed Molds

[@roykinn7]

I've found an 8:1 mix of isopropyl alcohol and castor oil in a spray bottle goes on more uniformly and releases easier than petroleum jelly or vegetable oil, I even prefer it to fancy, expensive mold release from Smooth On.

[@chrismaupin]

I've had luck making 3D printed moulds by just making a cube in the design environment and then doing making the form I want to create a negative-Boolean (subtract) which leaves the negative form. Then I just split the cube into halves and print. Nice if you add some registration pegs or keys as well along the edge of the mould.

[@AmieOkami]

Wow! I've never considered just using the 3D print for the mold instead of using silicone, this is awesome and I'm definitely going to try it

[@JonathanLawrenceMitchell]

Thanks for this. I attempted a basic ashtray using a 3d-printed mold with PoP and ended up with one attempt completely locked into the mold and another requiring the destruction of a part of the mold to release. What was missing in my scenario was the mold release agent. Also, fyi, you may find it beneficial to swap the gravel for dry sand as the aggregate in your concrete. Removing the aggregate altogether significantly reduces the rated strength of the concrete (as another youtuber said, "you are now making cement", which, by itself, is comparably weak. Sand may also provide you with the benefits of controlling coloration and finished texture of the products.

[@mohe81]

Cura also has a mold option. For complex molds you might want more options, but I made a cigar ash tray and just putting the stl of the ashtray in Cura and let it create the mold worked fine.

[@Bhrazz]

very nice, the pertroleum jelly is the answer I was looking for. However: ProTips: You needed cement ( not concrete) and also, please wear a mask when mixing concrete/cement: IT is very toxic

[@overlycranked8674]

Great technique! This is a perfect combination of the Artistic vision and technology. I also love the attitude in presentation. Now. I'm gonna get to floating a few goats of mine too

[@elijahjns81]

100% what I was looking for. I was literally looking for how to make 3d concrete molds with 3d printer. Imma try it out in blender though.

[@jamesjblackbird]

Dont know how I ended up here, I don't even have a 3d printer. But the video was great, both making and editing. Great attitude too.

[@drychalice]

Great video.... Side note. 33% portland powder - 33% PVA glue - 33% plaster of Paris. = putty-like cement. Half portland powder - half plaster of Paris = liquid-like cement. 48 hours to dry.

[@FurtherFabrication]

I haven't really done any different ratio experiments, so thanks for the tip!

[@keithcarter8048]

I gave this a go using a mould I designed in Inventor and printed with my Prusa Mk3. Turned out surprisingly well, even with just a light sand with some 150grit. My draft angles need to be steeper on my second version though, and I'm thinking about making a vibrating table to get rid of those bubbles....

[@jacksonwhiteley]

"slic3r, aka slic 3 r, if you wanna say it like a weirdo", that alone earned my like.

[@marcus_w0]

Thomas Sanladerer has left the chat.

[@StanfordLikesCake]

Just wanted to say you are an excellent KZbinr. There is literally zero bullshit or filler in this video. God it's fucking perfect and I wish other KZbinrs would view this video and learn how to be less annoying fucks. Definitely earned a sub from me. Top work mate. It seems you antipodeans have this shit worked out.

[@FurtherFabrication]

Thanks mate, really appreciate your comment! It's always tough to balance entertainment and education, it's good to know that this resonated with you haha

[@turn4turn595]

You can buy cement, it doesn't include aggregates. Though you might consider fiberglass fibers instead of stone.

[@SteveNilsen]

Woooha! I´m so gonna try this out. Have been thinking about casting in iron/alu before, but not concrete. And adding color pigments to it. Oh man! I just about sucks at Fusion 360, so getting the STL´s just getting me started to test out things. THANK YOU A LOT! Checking your instagram feed, you are truly a makers magician!

[@sevdev9844]

I've read somewhere that parts like these should be submerged in water at some point, to make them as hard as possible. I figure, when they are already quite hardened at the outside. Apparently the part then takes in as much water as needed to make it as hard as possible.

[@MateoGuio-lr9ym]

Amazing video ! This helps me with a model I have to make for school thank you !

[@RoseKindred]

I was more interested in the software aspect of this video, pretty cool. I cannot even make a box yet on the program from scratch.

[@Dmitry_IMHO]

very actual video even after 5 years

[@juliangoulding]

Nice always wanted to try this with a 3D mold, they look great. Add some Iron oxide to the mix and the come out Matte black, looks so dope.

[@FurtherFabrication]

chur, yeah I tried a few with black pigment, but couldn't get a nice deep black - probs just didn't use enough though haha

[@juliangoulding]

Yeah you do need quite a bit. I just kept adding it until the mixture was pitch black. Have you seen that Instagram Concrete Cat? The do some cray stuff with pigments.

[@FurtherFabrication]

oh man, just scouring their instagram now - trying to find process shots of how they do those textures

[@antonmilosevic]

Have you tried using gypsum plaster? Did you consider using a vacuum chamber and a more watery mix of concrete/plaster to really get rid of all the bubbles in it?

[@porker5749]

Not to be a nit picker, but if you remove the "Stones" (actually called aggregate) you are now making cement, Not concrete. I have no experience in 3D printing, so it was good to see this. Thank you.

[@buildyear86]

Not to be a nit picker, but he is not removing all of the aggregate, only the larger portion (the stones). He is therefore still pouring concrete, but with a mix design that has different properties.

[@porker5749]

@@buildyear86 What other aggregate is there if there are no stones?

[@buildyear86]

@@porker5749 there are bigger stones and smaller stones... Google it?

[@Voedzoeker]

​@@buildyear86 He is in fact making a mortar, as it is only called concrete if the aggregate size is larger than 4mm ^^

[@Lloyd.B.]

Nice process. I was thinking about making wind-spinner sculptures for outside with 3D printing, but the actual plastic from 3D printing won't last in the weather anywhere near as well as concrete would.

[@royalrevue23]

What do you coat inside so the cement won't stick to the print ?

[@carlosjosejimenezbermudez9255]

This is good, because silicon is really expensive.

[@JamesTenniswood]

Great guide, thanks for sharing

[@Exstaz]

You removed the molds?

[@Kai-fp3kd]

Fantastic shapes! Thanks for the video instruction.

[@alexdarafeev809]

What brand of petroleum jelly do you use? does it even matter?

[@SimenSupreme]

Would it be possibe to get the STL's you made in the video?

[@mprobison]

Great video, thanks. Watching I noticed how much I liked the contrast between the concrete and the white PLA. Maybe another line of "mosaic" candle holders with embedded PLA plates artfully placed? Something like a really terrible adhesive (painters tape?) on the inside of the mold could do the trick. Cheers.

[@FurtherFabrication]

Thanks! oh I hadn't thought about embedding 3d printed forms into the concrete, that could be quite an interesting concept to explore further.

[@Kyokahnn]

How about flexible filament for molds?

[@free_spirit1]

"Slic3r if you wanna sound like a weirdo." You sir deserve my sub. For the longest time I thought those germans were saying Slick VR. Every time I was like 'wtf are they on about', before I realised they were just being pedantic in a most annoying way.

[@ourearthculture]

Outstanding tutorial. Thanks!

[@NicleT]

You can use dish soap to lubricate the mold. Just be careful not to foam it.

[@JeremyCook]

Thanks for the info! (And thanks for not blathering on too much, ha)

[@joagj1978]

Loving those! I'd like to try out making some myself but can't find the files in the link above. Any chance of reposting them?

[@DanMurray6696]

This make floats my goat...

[@FurtherFabrication]

glad someone picked up on that lol

[@ciarfah]

Further Fabrication It's been my favourite saying for the longest time haha

[@MagicGumable]

@@FurtherFabrication Some of the old resources are gone from your webshop :/ could you fix the link? Greetings,

[@abigailfreckleton1694]

Wow, I need to try this....but first to get a 3D Printer!!!

[@changvibol4540]

Hello sir, Which program that you had used to make the mold?

[@CUBETechie]

I would like to make detachable casting mold for concrete blocks. Did you have any idea?

[@SPBHJ]

it seems like using boundary fill in the modeling workspace would be simpler. Then you could just split the body in half.

[@FurtherFabrication]

Yeah maybe, I've used boundary fill for a couple of other shaped molds and it works well, but you still would have a fiddly time of defining the edges to get the mold splits happening on the edge of the form.

[@SPBHJ]

you're right

[@patrickstaudt7538]

"Floats Your Goat" - Further Fabrication 2018

[@JimboJet737]

Great video, thank you.

[@EngineerNick]

I have always had to destroy my moulds with a blowtorch to get it to release, even with drafts and petroleum jelly :/ The concrete likes to grip those layer lines

[@joeldaniel45]

Can you reuse those molds for more projects without any defects?

[@FurtherFabrication]

Yeah you sure can! I've done over 20 casts from them without any degradation so far. If you keep them lubed up and clean they'll stay good for ages.

[@samuelcoker9617]

Solid video and editing :D

[@FurtherFabrication]

Thanks dude!

[@EdgyVidyaGeneral]

Hey mate. after I deleted the bottom face, I can no longer crease that bottom edge. But in your video, you're able to. any lips? I've flatted it, it just doesn't allow the bottom edges to be selected for creasing

[@EdgyVidyaGeneral]

NVM, fixed by recreating the bottom face, creasing, then deleting the bottom face while still in the form tool.

[@juanbogarin3851]

Very nice job man

[@FurtherFabrication]

Thanks man

[@TakamiWoodshop]

Nice Rob!

[@FurtherFabrication]

Cheers Rob!

[@cagamer4161]

Great job

[@GrishaSunflwrThalia]

Hi, Good day. This is really great project but I couldn't find the 3d Files. Can you send it to me please if possible? :) thanks!!!!!

[@helderlage]

very satisfaing... THANKS

[@robbie2975]

how much would a model cost ya?

[@Specter0420]

If you flip that lighter around so your thumb is on the bottom, it becomes impossible to burn the crap out of yourself at 7:24.

[@ChristiansD]

Awesine job! Very interesting.

[@browill9]

That was so cool. Thanx

[@neonboy22]

very nice. Wings3d is my favourite polygonal modeller. Always watertight solids. YMMV

[@FurtherFabrication]

Thanks! yeah I'm slowly trying to transition over to Fusion, it's just a good all round package for my style of modeling.

[@neonboy22]

yes its good and the license is currently more permissbale than onshape which forbids any form of monetisation unless you have the full commercial version. Lots of people now moving to fusion 360. Hope the licensing remains useful.

[@yehonatansabban8041]

Where can i download the project files? the link is broken

[@FurtherFabrication]

Sorry about that, I've fixed it now

[@yehonatansabban8041]

@@FurtherFabrication Thank you!! appreciate it

[@saxofonistacr]

Your concrete will be stronger if you add some fibers to it.

[@iffprove]

Great!

[@RedBreather]

The page is gone?

[@FurtherFabrication]

Sorry about that, I've fixed it now

[@RedBreather]

@@FurtherFabrication, thanks :)

[@stevengriffin9398]

Bob's your uncle!

[@melevolent8599]

If I comment my email address and measurements, can you print me a miniature brick mold? I can pay you in cad

[@StevenDavisPhoto]

Very not newb friendly. I guess I need to learn f360 better.

[@dbusmire]

"Slic-3-r if you want to say it like a weirdo"

[@Bo-auto]

...do goats float? 🐐🤨