Crazy Cuts Create Clean Castings!

[@sonipitts]

Robert, I think that "uncured hardener" you were wiping off was actually just blue marker ink from when you diagrammed the square vs circle mold. Especially since it was present on any other side than the ones you drew around. You can see the marker inking the mold at 1:50 in the video.

[@jfrelinger]

That was what I was thinking it was too when I saw it.

[@BEdmonson85]

I can't tell if he was just trolling us, or if he actually thought it was uncured hardener... 🤷‍♂️

[@drmntpibb]

I just wanna follow this thread to see if it was marker or hardener

[@DKarkarov]

Lol I would take his word for it. It is just about impossible to mistake marker ink for uncured hardener/silicon, they are different colors, different thickness, one of them is very sticky, one is .... well not sticky at all. Etc.

[@RobertTolone]

Now that you point it out it probably was just the marker. Duh. Oh well, there are many ways to embarrass yourself on KZbin! 🤪😄😄

[@treblam1]

He shoots.......HE SCORES!!! Great Job!!

[@gordonwiley2006]

"Perfection is the enemy of excellent" are the words of someone who likes to complete projects and not feel like a failure constantly. I want to embrace that mentality but I just have so much trouble getting there. Anyway, great cast, and clever tricks in this one. And hey, you could likely reuse those cradle bits for future molds of similar shape, slick.

[@DisgruntledPigumon]

I know it’s wrong of me but 2 seconds after Mr. Tolone talking, I hit the like button. (To be fair I wouldn’t do it if I didn’t already know how fun and informative his videos are.)

[@debrajol3585]

Nothing’s wrong with that. I know I love all his videos (and him 😁) so I hit the like button on my way in every time 👌

[@HandleToBeDetermined]

Aw yeah! A new Robert Tolone video!

[@Lowtechstudios]

Hi Robert. For the piece that broke off I don't know if you ever tried drilling a rubber mold with a aluminum straw (could be copper or any soft metal you can easily cut teeth into) with jagged teeth. Depending on the size of the straw that's the size your hole will be. For the lube just soapy water. For the teeth just a thin hacksaw blade to cut across like a pie. I put in in the on the Dremel and drill it slowly and it leaves a perfect hole and the plug stays in the straw drill bill. You can then injection in or funnel in the liquid rubber with the sculpture in the mold and that broken piece will no more and you'll have a one piece mold again.

[@saucercrabzero]

Great tip!

[@richh5038]

love your stuff. i had just discovered resin casting 4 weeks before i found your channel. has helped me a hell of a lot. thank you

[@cyberneticwarmachine]

I love how you easily saved this mold. Just all the experience knowing how to fix the specific issues.

[@maverickstclare3756]

This week Robert pulls off a fine horse

[@MarketResearchReading114]

Robert its a beautiful craft and I'm sure hard work, but I'm so glad you take the time to share it with us. I absolutely love seeing the results of your hard work in designing molds.

[@SoBeit777]

Ive never seen a horse with a chunky diaper. this is great

[@littletoysmaker]

Superb video, you are a great inspiration to me. greetings from Cuba

[@TvorCrl]

I gotta say I love your videos. Keep them coming. It's really cool to see the resulting models and the process you follow to get good results. Thanks for the diagrams too, they were super informative.

[@levinebette15]

The Bob Ross of description!

[@joek600]

Great video! I tried the craddle in one of my molds and yes its a real improvement because of the even pressure. Please please please make more videos on miniatures. Prefferably high detail miniatures that have the added difficulty of small volume (weight) of resin AND many details that might trap bubbles.

[@RobertTolone]

More miniature videos are in the works. Let me know if you have any specific characters or game pieces you’re interested in.

[@MarketResearchReading114]

@@RobertTolone Adapting more molds from 3dprinted masters would be wonderful. I especially liked seeing those mice get their treatments, seeing how to solve more design problems would instructive I bet for the modelers out there.

[@MarketResearchReading114]

er the random assortment of animals that may or may not have reminded me of redwall mice.

[@RobertTolone]

@@MarketResearchReading114 I’ll check into that, thanks!

[@Seshidao]

This was very pleasing to watch, superb work!

[@chrisnunez4758]

Woo! That horse came out looking great. Appreciate all the work that went into this. Now time to see how a concrete pour would do when I receive the mold. Though I'll definitely use resin first to get the hang of it!

[@RobertTolone]

Well… I would definitely do a resin cast first. I think you are going to have great difficulties casting this horse in concrete because the channels to the body chamber are the two hind legs. And it was a challenge to cast the horse even in resin because it is very slow to fill. You will need a very thin concrete mix to convince it to pour down those legs.

[@chrisnunez4758]

@@RobertTolone thanks! Yeah I'll keep that in mind

[@ssl3546]

why not use plaster of paris?

[@RobertTolone]

@@ssl3546 I would use hydrostone. It’s like plaster in consistency but much harder and stronger.

[@ahimanta]

Hi, The blue corner of uncured silicone are line from the marker that robert use to draw on a paper the mold shape, if you check the video you will notice that the lines appear after that hahahahaha

[@erinboatguy]

I've made thousands of molds.....the fix is cut a thin layer away to expose raw silicone and re attach with a small dab of silicone....or use a needle or straight pin to hold in the mold each time during assembly

[@nelsonlago9978]

Hi Robert! I'm from Brazil and I make silicone tube molds, with a technique invented by me. Brazilian silicone is low quality, tears easily, and expensive. So I had to do it with tube silicone. I have been making low cost and good quality moulds for over years.

[@RobertTolone]

Yes, people use tube silicone to make molds here as well. There are lots of techniques and formulas. I’ve never tried it but as you point out, it works.

[@deonjagaroo3374]

Well done Robert. Making parting moulds of animals always poses certain challenges. I constantly make make moulds, as I have a bronze casting Foundry. Experience shows each mould is unique to the other. Greatly appreciate you sharing you're technics each time, so patiently & explaining procedure so clearly. Thankyou & regards from our team: Kzn Bronze casting Foundry. (South Africa).

[@EV4UTube]

Great job again, Bob. Love your work!

[@TBL_stevennelson]

I was looking forward. To this video. I learnt a lot. Thank tou

[@levinebette15]

I love your videos!

[@MrTonypace]

I've seen the oily top/corner line with cheap white silicone before. On the plus side it works almost like mold release.

[@roger.agburn]

Nice finish of the project. =) Lovely video, Robert. Have a nice Halloween!

[@RobertTolone]

Thanks Roger!

[@mraide]

Great advise

[@levinebette15]

Why can’t you add wood outside to make even pressure?

[@levinebette15]

There it is! Those wood struts!

[@securityrobot]

Barney and Betty Rubble school of mold making🤣🤣🤣😂

[@NaF_Art_Studio]

i enjoy much what you do sir. it helps me lot as well. you want something to really fiddle with ? i can send you 3-5 ittirations of something i tried to cast using 3D printed original and has some complexity in it, it's a planter bot, with middle clearances to save on rubber, i inteded to do it commrcially so i was trying to find the easiest and most practical way, it didnt happen, the mold was VERY VERY difficult to demold, the suction force was just crazy i couldnt get the rubber out, i had to destroy my original every timee... i will send you the model and maybe u do a vid for all of us to watch together. thankss again.

[@RobertTolone]

Send pics to me at [e-mail]

[@j00bs]

hey Robert, thanks for making such informative and detailed videos. just had a question though while you were talking about applying pressure to all sides of a round mold : is it a bad idea to use clamps to keep box molds together? thanks again

[@bustersbashers2280]

When curing your moulds, why do you use a Pressure chamber and not a Vacuum chamber.?.? Thanks 🙏🏻

[@ValorArc_Designs]

Pressure is for the resin, it makes any air bubbles so small you can't see them, and vacuum is typically for silicone to remove any bubbles before pouring you mold. If you have a long pot life for the resin you can vacuum that as well if desired, but it really isn't necessary. Robert has a good video explaining all this.

[@bustersbashers2280]

@@ValorArc_Designs , Thanks for the info, I wondered what was the difference. 👍👍👍🙏🏻

[@DKarkarov]

@@bustersbashers2280 To add on to this it really comes down to a question of materials too. For example, if you have a long cure time silicon and long cure resin (12 hours +), there is basically no need to vaccum your material ever. The long cure time = much greater time in a malleable state while under full pressure, which is enough to make it almost impossible to catch a bubble.

[@mikewilliams234]

Hi Robert. When you say the holes are easy to fix, are you mixing up resin to fill the holes or are you using Magic Sculpt ( or other epoxy)? I really appreciate the idea of the freedom to sculpt the mold to fit the pressure pot. Great insight!!!

[@RobertTolone]

small holes I use resin, or putty, bigger holes I use magic sculpt.

[@ArcticFlies56]

Bob, as always you continue to amaze. You make it easy to want to come back time and time again. What will Bob do today? Will he do something new or will it be a new slant on an old technique. Will Bob surprise us and yet pull something entirely new out of his box of tricks. I can’t wait to see what he’ll don next. Thank you Bob for being so damn interesting! Best regards, Richard

[@RobertTolone]

Richard, you are officially in charge of letting me know when I get stale or boring. Somebody has to do it.

[@ArcticFlies56]

@@RobertTolone Wow, tough job!

[@RobertTolone]

@@ArcticFlies56 😄

[@floridaoddbod]

Hi Robert, very New to Molding, Can tyou tell me where i can get the blue strips of wax you use to make air channels & what is it called so i can find it online ? Many thanks in advance

[@austintanner5688]

what is your method to "fixing" the bubbles, do you just make a tiny batch of resin and pour it into the bubble?

[@RobertTolone]

Smaller bubbles that works fine. For larger bubbles I use epoxy clay.

[@bruinflight]

Maybe I need to watch more videos of yours before I start asking questions, but here goes anyhow: why wouldn't you put the mold with resin in a vacuum chamber rather than the pressure chamber? I know the pressure makes the bubbles microscopic, but wouldn't the vacuum draw them out of the resin entirely?

[@javivillarreal7008]

Hi awesome video, i have a question, can you make a mold out of a clay figure?

[@puffintosh]

Hi Robert, apologies if you've answered this before but I have a question about coloured resin: - if you were to cut it or sand it, will it be the same shade throughout, or lighter on the inside -> does the answer to the above differ between opaque and transparent resins? Thank you! (if anyone else also knows the answer please let me know)

[@DKarkarov]

Cutting and sanding will have an impact on color, but only in the sense that doing those things to the resin changes the surface texture. A rougher less glossy texture will look a little lighter in color as a side effect of the roughness. If resin (transparent or solid, doesn't matter) has a different color at different spots and you only poured one color then it just was not mixed thoroughly and the color did not fully blend into the resin.

[@Bl4ckw0lf1]

Ok, you talk about creating a mold that would utilize a minimum of use. I'm kind of curious that if you were to use a modular sheet system to create a jig from the flat box shape of an upright standing mold to a circular one. But then, I think that your board jigs and rubber bands take care of that sequence of support. So let me ask you this. You used chunks to occupy space in the casting of the mold body in order to minimize and reduce new materials used. If you were ever to a point that you could create a modular holding system from recycled chunks ans a minimum of new liquid casting material. Would you make a cast support as it work to provide a modular jig for future products down the road?

[@RobertTolone]

I would have to see these methods in practice to see how they work. In my shop it is always time over materials. Truth is I almost never use anything but round containers and new rubber. That’s because I mostly sculpt small toy prototypes for corporate clients like Disney, LucasFilm, Nickelodeon etc and my time costs the client way more than the rubber in those projects. Also, speed is important. Jobs have to be done fast and reliably every time. I use the same old tried and true methods and don’t much care if I use extra rubber or resin. That said, I emphasize saving materials in my channel projects because one of the most frequently asked questions is, “what are the cheapest silicone rubbers and urethane resins?”

[@Bl4ckw0lf1]

@@RobertTolone my apologies. I was under the impression that you were operating as a hobbyist.

[@love__JOY__peaches]

I love your videos. They are so informative and interesting. Regarding the 'uncured hardener', was it the Sharpie from tracing the mold onto the butcher paper?

[@RobertTolone]

Totally forgot about the marker. 😳😭

[@edgardoacosta2855]

Buenas tardes, te felicito por compartir estos tips. Lo que tienes detrás son bombas de vació? o otra cosa?

[@RobertTolone]

Son tanques de presión conectados a un compresor de aire.

[@edgardoacosta2855]

Gracias maestro por compartir

[@ichefable]

Why not make a mother mold before cutting your mold, I encase a mold with plaster and bandage. Then take out and cut. Put the mold back in the support (mother mold) then there is no distortion when casting. Rubber bands are uneven in my experience. I have learnt a lot from you, thank you

[@Bl4ckw0lf1]

Are you allowed to put pencil marks on the original to give you a guide to work with while cutti.g the original out of the mold?

[@RobertTolone]

Sure, it that works for you. I find it most helpful to take lots of pics of the object and map out the cut lines on those.

[@timgorringe4092]

Do you ever use filler powders or micro balls to save weight and resin on your castings?

[@RobertTolone]

Rarely, but they can be useful depending on your requirements.

[@quassisbelltower9408]

I have a item I want to cast but I don’t know to go about it. Can you help me with it. It a spider from a spider ring. Can you help me with it? How can we do this?

[@RobertTolone]

Send pics to me at [e-mail]

[@stefanweber4548]

Question. Could you inject the resin with a syringe through the mould?

[@glenfisher728]

You could do but it's another step in the process and added cost . Again if your using amounts like 230 ml of resin it's going to set quick accept on these cold Californian mornings .

[@DKarkarov]

@@glenfisher728 Not always true. Matter what your resin is. I would still say don't inject it, because unless you are trying to do different color resin in different parts of the mold or something, it is just not worth the hassle. If your concern is a clean pour just use high viscosity with a water like pour. It might take a lot longer to cure, but it would pour smooth and probably less likely to catch a bubble.

[@pedrogonzalez468]

Hi Robert, i've been casting a resin figure and i'm having some problems. I have no idea of whats going wrong so is there any way that I can send you a photo so that you can help me solve the problem?

[@RobertTolone]

Send pics to [e-mail]

[@DerivativeWorker]

This mold should come with boss music.

[@mealex303]

That was marker you wiped off

[@humblehombre9904]

Magic marker, Robert. You traced it in the beginning. All is well.

[@yoopermann7942]

thank you for the tips,, were you just messing with us to see if we are paying attention to what you were doing as well as saying??now i may be blind as a bat even i could tell that was marker!! ha ha it was a good one on those that dont pay attention huh?

[@RobertTolone]

No, I just forgot that I traced it with marker. Don’t start a KZbin channel if you’re afraid of making a fool of yourself in public! 😄

[@amirulmukmin4965]

Wondering... Did u got Instagram or Facebook to contact?

[@RobertTolone]

I have both but I constantly forget to check them. Reach me at [e-mail].

[@farfaraway4285]

Out of topic but the title sounds like a tongue twister. Say it 5 times in a row 😊

[@MindsMouth]

You don't put any price, I've looked everywhere on their website and catalog. No prices anywhere 😤😤😤😤

[@RobertTolone]

Do you mean the Silpak website? They do not advertise and are somewhat old-school. So you have to call them for prices. They don’t even have an ordering system online but if you call them they are very helpful and will take your order and also explain and answer questions.

[@MindsMouth]

@@RobertTolone Yes, thank you. I'll just go to Amazon for supplies. 🤦‍♂️. Prices are clearly listed, and shipping in 2 days. No need to call or waste anymore time. But if I did have questions, I would call in. 😁