The beginner's guide to mold making and casting

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More info: blog.prusaprinters.org/the-be...
In this video, we'll show you how to create molds and casts of your 3D-printed objects. This opens a whole new range of possibilities, such as small-scale production of custom-made products - like candles or bars of soap. It's not difficult at all and you need only a few basic things.
The sample model was printed on the Original Prusa SL1 from white tough resin, the tool for making a mold was printed on the Original Prusa i3 MK3S.
Original Prusa SL1: shop.prusa3d.com/cs/52-origin...
White Tough Resin 1kg: shop.prusa3d.com/resin/944-wh...
Original Prusa MK3S: shop.prusa3d.com/3d-printers/...

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Опубликовано:

6 фев 2020

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Комментарии : 167

@KK4CNM 4 года назад

Pro tip: Use sulfur-free clay. Clay that has sulfur in it will inhibit the silicone from curing properly. Tip 2: You will want to seal the SLA print. That kind of resin does not react well with platinum cure next to silicon. Prints can be sealed using a few coats of a good clear coat. For example, Krylon crystal clear.

@KikkawaRyu 4 года назад

A big flex there, using an old printer bed for the base to do it all on aha

@JulianMakes 4 года назад

I use my mk3 for making moulds and patterns all the time, it is such an awesome machine.

@schedelworld 3 года назад

Thank you so much for making a concise video with subtitles. This was just what I needed!

@camilapascual1993 3 года назад

Wow this is my current dream right here. Making molds for candle and soap making !

@F2_CPB 4 года назад

Thanks for making this video! I was planning of cold casting my 3D printed beyblades. It's really helpful for me

@vincentpernicano3277 4 года назад

You are a brilliant marketer and business man Mr. Prusa! My hat is off to you for realizing the potential market for this use case of SLA printers!

@Mr.C-Mister 4 года назад

DUDE CAST METAL BLADES TO A PERFECT SIZE IN CLAY WTF! THIS IS AMAZING!!!

@laurispeterisvejs4007 4 года назад

Still loving my prusa i3 mk3

@updnup 3 месяца назад

Exactly what I was looking for, thank you!!

@tranhdinhda_bino3259 3 года назад

Thanks a lot for your video. Now i know the difference between " mould" and " cast".

@microfx 4 года назад

Super awesome video! Thanks man!

@forward3dprinting796 4 года назад

Fun vid Josef. 😎

@MauryXman 4 года назад

SIETE SEMPLICEMENTE FANTASTICI, GRAZIE GRAZIE GRAZIE Yuo are too much fantastic , thanks thanks thanks

@DwarMeji 4 года назад

I've viewed many videos like this one using a 3d printed model to cast in a silicone rubber mold for use to cast epoxy, urethane, wax, pewter, etc. Though I've yet to see a video that shows 3d printing of the mold itself from flexible filament to use for casting. This could be a time saving technique.

@interficiam 4 года назад

I just print my molds directly: take 3D-object, subtract it from a cube and split that in half. Then print that. The molten wax isn't hot enough to ment the mold, so it works fine to make candles.

@Alm8hoorOW 4 года назад

interficiam, what material did you use?

@interficiam 4 года назад

@@Alm8hoorOW I used transparent PETG. I don't think it matters a lot, but with this i could see if there were unfilled areas in the mold.

@alexalexalexmack 3 года назад

You may have just changed my life. THANK YOU!

@allaboutedm8050 3 года назад

Hi I haven’t done this before so just wondering, when you say ‘take a 3d object’ is that a physical object or something digital on the design software used for the printer? I am looking to make lots of different one sided moulds

@ivanperez8200 4 года назад

Awesome!! Should do concrete pots too from a 3d printed mold

@keiou 4 года назад

Great idea! 😁

@grantsbirds1207 4 года назад

love the video!

@admon1234 4 года назад

Pretty fun video

@cakeller98 4 года назад

Very nice instruction -

@mlubecke 4 года назад

Very cool 😎!

@somedude2492 4 года назад

So now there is a Prusa resin printer? Wow

@homeautomationlab1533 4 года назад

I see the cult of Josef Prusa is progressing nicely, hail to the chief. I can't wait to sit in my bathtub tonight surrounded by little Josef's candles and wash my self with Josef soap.

@eliseorocchetti 3 года назад

Great video! Thank you very much! I would like to know which kind of product is the separator you use

@NoMoreBsPlease 4 года назад

Ohh, this gives me a great idea for 3d printing a Prusa... I meant project

@constantinosschinas4503 4 года назад

prusa is a great comedian. first he designs a 35.000 hour, utterly expensive IKEA hack booth, now he is actually printing what you can make in 1 minute from carton. way to go man.

@KaossFPV 4 года назад

oooooweee someone needs to stop biting nails :p great video!!! love these quick videos

@OscarTorresWork 4 года назад

Great video, what silicone material do you use? Looks like it was already prepped and no two part mold solution just the activator really nice.

@joseamirandavelez 4 года назад

Awesome! And I just need two printers!

@stancutaheart 4 года назад

Tare, seful pe post de lumanare, e bun cand nu vrea sa-ti mareasca salarul. :)

@flemmingnielsen904 4 года назад

Nice😀😀

@Zeksait 4 года назад

Thanks!

@jeffdeprey6279 4 года назад

Think these same steps would work fine if I used Plaster instead of Silicone so I can cast clay?

@Clay20208-Gaming Год назад

Awesome thx

@harti36126 4 года назад

Hi. I am still new to 3d printing. I have MK3s and use PrusaSlicer. Is there an option in PrusaSlicer to print object in negative, so I can print out the mold immediately? This would be a great feature.

@PetrHosek 4 года назад

Je to uzel nebo knot a nebo knot a nebo wick ;)) ?

@cigp 4 года назад

Nice

@mrpancake5761 Год назад

can you also cast with melted filament? for example supports that i dont need anymore

@Harz77 Год назад

I want to make fine casting moulds. That’s my profession, would a 3d printer help to then create a rubber mould that I can pour consistently?

@Aletaire 4 года назад

Anyone going to comment on how similar the music is to Austin Powers?

@BurninGems 4 года назад

Ja baybeee...

@BAHDK 3 года назад

@alexalexalexmack 3 года назад

ahaahaha i totally thought this too

@nobocks 4 года назад

i know there is some flex for sla, possilble to print directly the mold ?

@noisycarlos 4 года назад

I'm guessing it depends on the melting temperature of what you're making. You don't want the hot soap to melt you're 3d-printed mold.

@Harz77 Год назад

What 3d printer do you recommend? And silicone?

@TheRealMisterJ 4 года назад

I love my prusa, but just got my old Taz working and noticed in Cura there is a mold function that automatically slices a solid model into a castable mold.. Is something like that possible on an mk3?

@kr15uk 4 года назад

J S Just add your MK3 to Cura, highly recommend.

@benthk3dprt136 4 года назад

I tought about casting, but it takes longer to cast and requires more expensive materials then to acctually print it. but sure if you want to make candles or soap this is great.

@jojoposter 4 года назад

Yeah. When we tried to make 80 copies we evaluated casting as well. But it was cheaper and faster to print all of them

@juan2617 4 года назад

I am reading through the comments and my question is only could I do a silicone mold instead of using S LA or resin. Should I use the actual negative as a traditional 3-D print with FDM Printing then put it in creating a mold box and then pouring the resin or would that be too hot it and it might melt the actual PLA o ETG

@TGWMS 4 года назад

Nope because you must stretch a mold for correct remove the cast from it and when you have mold without stretching you are not able to put out the cast. And of cause the temperatures of casting material. With those temperatures you melt down the plastic.

@TGWMS 4 года назад

@necromanteion1976 3 года назад

Wouldn´t it be easier to print the mold ?

@arunpanchal7592 4 года назад

A tutorial on metal casting please from sl1

@paulmason5543 4 года назад

Go to m.ru-vid.com/show-UCNC9gjgYrzLfyMQmp31DnjA

@TGWMS 4 года назад

Soon

@blubbblubbblubbish Месяц назад

Nice tutorial. The background music sounds like someone wanted to rip off the Austin Powers soundtrack, but made it just different enough so that it doesn't infringe copyrights of the original.

@MilanRys 4 года назад

Burn Průša Burn :D Combination of 3D print and casting is very powerful, much faster than only 3D print and the material structure is better.)

@yeetusdeletus650 4 года назад

or use molding mode on cura

@DougHanchard 4 года назад

Anyone know of a reputable Canadian supplier of all the chemicals required?

@siliciy_ 4 года назад

I made galium tin and zinc prusa figure ;-)

@martinbudinsky8912 4 года назад

Aha tak sem utekl ten vesnickej úchyl. :D (tři sestry)

@hackneo64 4 года назад

Just in time for valentines day...was thinking of a neat gift to make for my girlfriend

@alextardif 4 года назад

Totally! Nothing screams LOVE better that a candle in the looks of another dude!!! Offer to bathe her by rubbing Josef Prusa's soap face all over her body and you're in for date she'll never forget!

@Gr8Success 4 года назад

you could make her a custom dildo on your 3d printer in ninjaflex filament or you could make a mold to make a silicone one

@throwawayaccountm1325 4 года назад

@@Gr8Success I mean...Its possible but.... WTF

@colinyoung3685 4 года назад

@@throwawayaccountm1325 He's a romantic.

@bigwurm8314 4 года назад

Isn't there a reverse model option on prusa slicer to make a mold of it like cura?

@Prusa3D 4 года назад

Unless the shape is super friendly for casting, you can't just print the mold. It needs to be very flexible, otherwise you won't get the cast out. - Mikolas

@oupis1983 4 года назад

aniž by to byla reklama, ale odkud jste koupili silikon a tvrdidlo? Když už jsme u toho tak i ten separátor :D good job

@Retyus6 4 года назад

stačí se pozorněji podívat a na tom kýblu je nápis. Lukopren. Mají vše, i separátor. Pro více infa stačí googlit

@shreygupta1641 4 года назад

Why not go for mayku formbox instead?

@wesbrackmanthercenthusiast4695 4 года назад

Just print two pairs of inverse molds and cast in that so the print would be the mould that way things like clamps and hinges could be built into the design even cooling tubes to run water through I will be useing this technology in the future for lost wax casting of replica steam locomotive parts and old tractors

@joshuamiller7231 4 года назад

I have tried this a few time and hit a few problems. Like it will leak, sorry they just do not get tight like a silicone mold would. Also getting your item out it really helps to have the flexibility of silicone. I have been doing 3d printing to casting for a few years now, and use it for as much as I can but direct to mold has not been very good for me.

@xmalina 4 года назад

What about printing the mold with tpu?

@joshuamiller7231 4 года назад

@@xmalina layer lines like crazy and it will likely still leak. Not saying it can not be done, depends on the quality of the end product you need and time you want to put into the mold. If your item does not need to be perfectly smooth and shiny then yea. Also you can improve the seal with silicone to slow leakage. SLA and the small layer lines are great for casting but then we are limited by print size ... the joys of 3d printing.

@MCRuCr 4 года назад

Why not print the mold directly? You could also integrate cooling channels to watercool the form and go mass production!

@TGWMS 4 года назад

You must stretch a mold little bit to put the cast out I it so that printed one is enough for really simple objects but not for objects with some detail. And of cause you have all print lines on cast itself from mold

@Mr.C-Mister 4 года назад

This is so fucking awesome! I'm no longer board. MICHAELS HERE I COME!

@cr6925 4 года назад

Can the SL1 print in different types of resin? Or is it limited to just one type of resin?

@ImaginationToForm 4 года назад

Yes. There are ABS-like,flexible,fast curing resins.Long as it's marked as 405nm it's OK

@TGWMS 4 года назад

SLA or MSLA technology have over 40types

@timon1463 4 года назад

Any plans to try something like this with metall?

@Tommy-pv1vh 4 года назад

same basic proses but for metle you want to use someintng like sand insted to silicone

@robertbennett883 4 года назад

You can do pot metal (low melting point metal like zinc) in a silicone mold . But brass, copper, aluminum, or other metals with melting points higher than about 300⁰ C will need to be done in either an investment (lost pla) or sand cast.

@TGWMS 4 года назад

Yep

@marccretten 4 года назад

How UV stable are the SLI 3Dprints?

@josuebetancourt9527 4 года назад

from my understanding it all depends on the resin, but I think compared to FDM they do decompose faster under use and UV exposure.

@1FishinAddict Год назад

All that work and you could’ve printed the Mold itself lol.

@AnilArya51 3 года назад

Next is *ORIGINAL PRUSA SOAP* by *JOSEF PRUSA*

@mikebuckler 4 года назад

Any idea on the release of the XL?

@throwawayaccountm1325 4 года назад

I mean, they said it will be an XY core one with a 40x40x50 cm build Volumen..... soooooo maybe this year ?

@throwawayaccountm1325 4 года назад

Never mind.... Next year maybe ?

@dr.orphanic1375 4 года назад

Super. Akorát já potřebuji odlévat hliník při 800 °C :-D

@TGWMS 4 года назад

Forma to vydrží ;-) bude o tom příští video

@doc.chocholousek3378 4 года назад

@@TGWMS Tak příští asi ne xD

@MrMoka15 4 года назад

When I tried to mold a SLA print with silicone the silicone didn't cure. Anyone an idea why this happened? I used Anycubic Resin and Smooth-On Ecoflex Silicone. Do I have to use different silicone or is there a special resin for casting/molding silicone?

@TGWMS 4 года назад

You must have 2part resin not that you cause with UV light

@Dombi3D 4 года назад

Hi Alex, I had the same problem but than I have found out that Resin prints are problematic with Platinum-cure silicone. I bought than one Tin-Cure silicone and it worked. I am planing to make a video about it in the next weeks because I could not find any video before regarding this issue!

@TGWMS 4 года назад

Do you have right set of both parts of silicone?

@MrMoka15 4 года назад

@@Dombi3DI did used platinum cure silicone, maybe this was the problem. Next time I will try another silicone. Thank you for this tip.

@grogyan 4 года назад

Lost wax/PLA casting?

@TGWMS 4 года назад

Soon

@Mike-pz2ov 4 года назад

When is Prusa XL going to be announced? :)

@Anatol.Junior 4 года назад

Why you didn't just print the casting negative?

@TGWMS 4 года назад

@canercelikq 3 года назад

cant we just use ninjaflex to create mould?

@BAHDK 3 года назад

silicone doesnt need a seperater

@carlandre3892 4 года назад

No one: Josef Prusa: ORIGINAL PRUSA SOAP BAR By Josef Prusa

@medyk3D 4 года назад

There is Prusa on fire at 5:23

@privateprivate31337 4 года назад

How come you can't just 3d print your mold?

@noahno 3 года назад

No need to print a mold shell, foam core and a hot glue gun work fine and save time/materials

@pokszymon 3 года назад

5:07 what's up with those thumbs?

@bobabooey8367 3 года назад

did anyone get that Austin Powers vibe at the beginning?? Yea Baby Yeeeaaahhhh

@spawn666reaper 4 года назад

Why not just print the negative and use that as the mold???

@MichaelReitsma 4 года назад

I was wondering that too. Is it not possible to print two halves that you can use to cast candles in? And how to do that? Getting my mini soon ..

@maxtheswamp 4 года назад

i dont get it etheir. we print directly molds with channels to release air and pins to estabilish mold parts in accurate position.

@SenorRu 4 года назад

Hot wax/soap would warp the plastic, I guess. Alternatively what if you printed positives of the mold and pour the silicone on that?

@TGWMS 4 года назад

You can't put out the cast without stretch the form a bit . So when you have mold printed that cast stay stuck inside and you can't remove it from inside

@poodlescone9700 4 года назад

Why would you not just make a negative of your print and print the molds directly?

@TGWMS 4 года назад

@thedangerouskid9955 4 года назад

Or just go to cura and press "make mold"

@gioromeo 4 года назад

Hi, how did you melt the soap in the microwave? Normal soap bars do not melt with microwaves but in the video it looks like you just put soap slices in the oven 🤔

@TGWMS 4 года назад

Yep if you have soap for casting then you can melt it in microwave

@gioromeo 4 года назад

@@TGWMS Is is a special type of soap? Thanks

@TGWMS 4 года назад

Nope it's standard soap that you can use for casting. This soap is little bit different than that you buy in standart store those you can buy from farms, hobby store or some creative stores. It's for casting or making your own soap. Normal soap you must melt on fire with bit of water then you can cast it also ;-)

@erispe 4 года назад

If you are printing a mold shell, make it shaped more like the model you are casting, following the contour by a centimeter or two. Will save you allot of silicone!

@CalamityLime 3 года назад

the music sounds weirdly Austin Powers

@tetsuoswrath 4 года назад

And when I get that feeling , I want sensual printing. Sensual printing, oh baby , Makes me feel so fine. :{J

@colinschabel 4 года назад

I don't know how to use a mick-row-wave

@oh5148 6 месяцев назад

I thought resin prints didn’t need supports lol

@mehrdadhaghighi5140 2 месяца назад

Why not just print the mold with the Resin printer for a perfect result and less manual work?

@damenevans 4 года назад

... couldn't you simply print the mold?

@TGWMS 4 года назад

@sebamop 4 года назад

If you print it in two halves, you avoid the modeling clay part

@julianreverse 4 года назад

Nope, you won't get a perfect result out of it.

@TGWMS 4 года назад

Exactly. You are not able to do perfect half of mold.

@throwawayaccountm1325 4 года назад

@@TGWMS you are the reason why i didnt had to write ,,because it would melt'' or ,,because it has to be slightly elastic'' under every comment with ,,why not just print boath negatives??'' . Thank you

@TGWMS 4 года назад

@@throwawayaccountm1325 because that's the reason for the same question again and again that question have still the same answer and you already answered it ;-)

@colinschabel 4 года назад

Ever make a table candle? You pour the wax on the table, and set it on fire

@bebebe3000 3 года назад

really?

@lukassaiz105 4 года назад

je smutne ze ceska firma nema video v cestine. to je hanba. a titulky to nezachrani..

@doc.chocholousek3378 4 года назад

kolik čechů ty tiskárny koupilo taky bych byl rád za český videa ale časově se to dost nevyplatí nemluvě tom že cz umí jen češi, aj vsechni včetně čechů, takže to je i korektnější k zahraničním zákazníkům

@ergosum9416 4 года назад

Why not just print the inverse of the model? Seems a bit overkill

@avongil 4 года назад

Because of undercuts. If your object has undercuts, it cannot be de-molded. A silicone mold offers flexibility.

@ergosum9416 4 года назад

@@avongil why not print the mold in two halves with internal supports, and then clear the supports in the same way he cleared the supports off the model

@julianreverse 4 года назад

because this is the right way how it's done.

@TGWMS 4 года назад

@Elektromanyetix 4 года назад

this figure so ugly please dont make this again!

@tbone1943 4 года назад

No need for music here

@JohnJones-oy3md 3 года назад

Imagine being this narcissistic.

@kubectlgetpo 4 года назад

It's insane how much this Joseph dude is full of himself. Getting out of hand. His face is on packaging and printers. He makes his staff make trinkets with his face. The build plate says JOSEPH PRUSA larger than anything else. The freaking thingiverse clone is called "Prusa" printers .org. No, not, anything else, it's prusaprinters.org. it's repulsive. This is the only reason I chose not to patronize this company. Prusa is trying to be the Gucci of printers.

@Prusa3D 4 года назад

Haha don't take it so seriously. It's usually not Jo, but us, employees in the company, slapping the name to everything we develop internally for fun. And more often that not, we simply get so used to the name, that we keep it once the "product" is released ;) - Mikolas

@kubectlgetpo 4 года назад

@@Prusa3D thank you for that insight! That means a totally opposite culture to what I portrayed in my comment and actually a healthy one!!