I love your channel. When I was in college I took several semesters of mold making and bronze casting and my teacher was a gem, you remind me of him very much. Super informative and fun to watch! Thank you!
I don't know how I found you or why I continue watching as I have no interest in ever doing this, but I sure as hell won't be stopping anytime soon, so interesting to watch! :D
Great video. I have bunch of these mugs and it is one of the most detailed "mass" produced mugs I have seen, so it is fascinating to see how the molding process is done.
@@RobertTolone I love the fact that it is NOT motorized ! I puts this project in the realm of possibility for crafters trying something new. Thank you very much Mr. Tolone
Beautiful rotocast. I am running 3 different rotocast objects in the shop this week and it's super helpful to rewatch your tips. I always seem to forget something in the process so I take notes of your tips and when I remember to follow them I get good castings!
I know you don't need compliments but your skill, experience, ability to communicate in a clear and entertaining manner, and great editing really come together to make some really fantastic educational content
I can't get enough of this stuff! It's different techniques and materials that I don't have any experience with, so it prompts me to think about if there are better ways to do the things I'm doing. I'm doing a product design, a carbon fiber part made on fiberglass molds, with a urethane overmold.
I've seen so many of your videos but this one I caught while its still fairly recent, thank you for going through the bother to make these videos they're very informative.
Another fun video. I'm so glad I stumbled on this channel, I can't even remember how it happened. I had no interest in casting and now I'm an armchair expert !
Good morning Robert, another awesome video to start the weekend. I’d love to have a screen saver that just shows you and your rotation machine. I could watch that all day. Trouble is......... I probably would do little else.
Ahwwww Robert, it's always cool to see you. Your tutorials are the most fun and addictive of all the casting industry, and more. I feel like my mom's waiting for her "top Model", Tv program in the 90's... Shhhht it's Robert time!!! i hope you'll still be there 35 seasons from now. Your way better than her tv program just saying. Hugs Robert.
I didn't even know rotational casting was a thing, that's so cool. Have you ever done any spin casting? I used to help my uncle mass produce DnD figurines when I was younger and always found it pretty fascinating.
One element of slip cast is to use a mold that will draw the water out of your slip (e.g. plaster of paris) so that the layers of slip will dry out inside a sealed container. I am not sure that would work as well with a silicone mold.
Robert can you do video regarding the stuff you use...I need to get myself that gadget that melt the sticky wax...and also what is those thin sticks you use for venting bubbles pls....also where to buy al those items.
Typically for ceramic molds (though it has been a while for me) your final molds are some version of plaster, which are usually multi-part molds. The ceramic "slip" is predominantly liquid clay; clay with an excess of water. The consistency is usually between Maple syrup and cake batter. Normally you fill the plaster mold completely with the slip and let it set! No rotation is needed since the mold stays filled throughout the process. As the water in the slip migrates into the plaster, it will solidify from the outside in. (Molds need/should be allowed to dry in between uses. They can deteriorate over time due to the wetting/drying cycle.) Depending on the object's size, you will wait several minutes and then dump the still liquid slip from the mold center for use later. You normally do not let the slip totally solidify, depending on the part, you usually only want a relatively thin shell. (Unlike with resins, slip won't go off on it's own other than by drying, and you can usually reliquify it by adding water and stiring.) So you now have a soft clay shell in the mold which you continue to let to air dry in the mold untill it is firm enough to demold and handle; then you let it dry some more. When suitably dry, you do a first firing in a kiln causing to go from very brittle to somewhat robust. Then you can paint and glaze as you go, firing in the kiln as needed to its final "glass like" state. Depending on the slip, just clay up to finer porcelains, there are recipes of times and temperatures to follow, and a fair amont of shrinkages need to be allowed for. I am very interested in how this silicone mold will be utilized. The detailed surface is very intricate, but the silicone won't absorbe the water? Is the silicone mold being used to cast resin masters for subsequent mold making? Or is it a totally different process from the one I'm use to from 50 years ago? Thanks.
I think it is going to be more of the negative blank maker for the plaster molds since you only need a handful of the resin ones where you'd likely make a three part plaster mold around the negative made from the master mold to make more suitable molds then producing the clay versions via slip casts
I know this is an "old video" (for the youtube timeframe) but i was thinking, what if some very thin and soft material was glued to the outer shell's inner face to apply the slightest pressure on the rubber mold to close down the misaligned parting lines? Maybe just lining with paper would add just enough thickness do the trick.
In practice I have found that a shell that fits the rubber blanket precisely gives the best results. Any lining will cause the shell to not fit the rubber blanket and will distort it, resulting in open parting lines. But experiments are always worthwhile so you could give your method a try and see if it yields a good result.
is it a special resin that is used in the rotary cast ? or can i still used my smooth cast 66D fast dry resin ? and how do you know how much resin you will need to make a strong enough wall coating on the hollow mug
Great job! Bob, I love that rotator machine. It’s as perfect as anyone could expect. You make it look sooo easy. I have a question for you. Could you make the hard shell crystal clear so that you could see your parting lines? The “Peanut Butter” shell is like playing Russian Roulette because you don’t know if the parting lines are tight or not. I think if you could see through the “Peanut Butter” hard shell it would be much better. It’s not really Peanut Butter, ha ha.
I have a question I figured you might know the answer to. I have mugs I 3D print that come with a decorative lid that thread together. Is there a way to mold the internal threads along with the mug? Love the channel, so happy it came up in my feed!
@@RobertTolone I doubted it myself but wasn't sure, so figured i would ask given your knowledge. Thank you for such a fast response though. Out of curiosity, do you happen to know of the particular name for such a silicone for pewter casting ?
The white statue was solid so it's mass was greater. This cup was cast in four shots so the resin doesn't get as hot . This is a hollow casting so it's mass is dramatically less. If you poured it solid it's linear shrinkage would be similar to the statue .
What Glen said, also adding that the higher mass also means a higher temperature, so the plastic has expanded a bit while it was still in the liquid and gel states, then shrinks when the material is still in the more solid but still malleable green state.
Look for companies that sell equipment for furniture moving. They likely won't describe them as being silicone, just calling them "rubber", but I'm 99% sure this is the type of band he is using. They are great. They stretch a surprising amount without breaking. I've used them for piano moving to hold moving blankets on.
I think he used the word "cradle", but that refers to the part being held in place. Try searching for "Rotational casting machine" if you are searching in English.
The larger wooden frame that spins is the rotational machine. The smaller wooden frame that holds the mold is a cradle. It's the same word used in English to describe an infant's bed (specifically one that rocks or bounces), as well as any container that tends to be matched to the size and shape of what it holds and stabilizes that object within a larger device. Cradle can also be used to refer to an area or conceptual space where another thing started (i.e. was "born") and/or was nurtured, similar to how a cradle holds and protects a baby while it grows. For example, where I live there's an area/site in the nearby National Forest called "Cradle of Forestry," because that was where the first school of forestry in America was established back in 1898. Cradle can also be used as a verb. To cradle something is to hold it the way you would hold a baby, or any object you're trying to be careful with.
![Digital Circus Episode 4 [TRAILER]](http://i.ytimg.com/vi/abZtsmMUbJo/mqdefault.jpg)
It is the little thinks that bring the greatest joy Robert - the look of joy your face as you test spin.....
I love your channel. When I was in college I took several semesters of mold making and bronze casting and my teacher was a gem, you remind me of him very much. Super informative and fun to watch! Thank you!
Wow l! Great video Robert You are really kicking RUclips’s you-know- what with this channel.
Sir, I just can't stop watching your work. That guides you put in youtube is priceless! Thank you very much!
I have no idea why the RUclips algorithm showed me your work but I'm so glad. Your joy is infectious. I love watching your work. This is awesome.
Love watching you “SPIN TO WIN”. Great job, Robert!
One of the few good things to come from a pandemic is your channel, thanks for sharing!
Thanks for watching!
I wanted to let you know that I learned a lot from these videos. Thank you
Hello my favorite young man...
I absolutely loved it. Watching you enjoy yourself so much makes it all the better. Great job sir.
Thanks Jessica!
I don't know how I found you or why I continue watching as I have no interest in ever doing this, but I sure as hell won't be stopping anytime soon, so interesting to watch! :D
Great video. I have bunch of these mugs and it is one of the most detailed "mass" produced mugs I have seen, so it is fascinating to see how the molding process is done.
I'm a Juilliard-trained plastics engineer and would strongly suggest adding motors and spinning those frames at 60,000 RPM - minimum. ;)
😆😆
@@RobertTolone I love the fact that it is NOT motorized ! I puts this project in the realm of possibility for crafters trying something new. Thank you very much Mr. Tolone
another great video from the PROFESSOR!! that was cool to see you do thank you for the tips
I love the sheer "Rotation Machine" JOY on Robert's face! Great video!
Great Job Mr. Tolone...congrats...
Суперский мужик! Миллион лайков за харизму.
Great tiki vessel!
Fascinating. Expertly done!
This is my favorite youtube channel. It really is!
Thanks Filipe!
bunghole… bunghole!!!
Beautiful rotocast. I am running 3 different rotocast objects in the shop this week and it's super helpful to rewatch your tips. I always seem to forget something in the process so I take notes of your tips and when I remember to follow them I get good castings!
Glad you find the videos helpful Nick.
I know you don't need compliments but your skill, experience, ability to communicate in a clear and entertaining manner, and great editing really come together to make some really fantastic educational content
Woohoo!!! I have been chomping at the bit for this video! Thank you for continuing this amazing work!
Looking good Mr Bob.
Thanks for showing us.
Thanks TP.
I can't get enough of this stuff! It's different techniques and materials that I don't have any experience with, so it prompts me to think about if there are better ways to do the things I'm doing. I'm doing a product design, a carbon fiber part made on fiberglass molds, with a urethane overmold.
I've seen so many of your videos but this one I caught while its still fairly recent, thank you for going through the bother to make these videos they're very informative.
Another fun video. I'm so glad I stumbled on this channel, I can't even remember how it happened. I had no interest in casting and now I'm an armchair expert !
Always a pleasure to watch you work. I wish I found your channel months ago.
Thanks, glad you found it!
Thanks Bob , interesting as always . Hope your well there.
Incredible! Amazing job, looking forward to seeing more videos. 👏
Yes!!!! Was waiting for this!
Good morning Robert, another awesome video to start the weekend.
I’d love to have a screen saver that just shows you and your rotation machine. I could watch that all day. Trouble is......... I probably would do little else.
I'm one of the new ones... :P In total love with the content!!
Brilliant, as usual.
Thank you, Mr Tolone.
A master making a master. amazing
Wow!!!! Amazing 👨🔬 you really are such an inspiring and brilliant teacher, thank you for another lovely and very informative video xxx
Ahwwww Robert, it's always cool to see you. Your tutorials are the most fun and addictive of all the casting industry, and more. I feel like my mom's waiting for her "top Model", Tv program in the 90's... Shhhht it's Robert time!!!
i hope you'll still be there 35 seasons from now. Your way better than her tv program just saying.
Hugs Robert.
Amazing how much knowledge goes on here 🙌💯🤩
That was cool! I really liked how it came out! You do great work! Let it to the Pro.....
nice job!
WOW...LOVE IT!!!
Amazing work thank you for sharing your talent!
عاشت ايدك ... Good job , the word in my country
It’s perfect!!!!🙌🏼✨
I sincerely appreciate you sharing your expertise. I always look forward to your videos.
Wonderful job Robert! 🙂
Fantastic cast - perfect by all means
Awesome job.
another great video.. thank you
loving your videos and thankful for the tips. keep it up
Very nice. Very informative.
I'm loving the videos and I'd love to start at this craft.
Great cast, love your roto caster
Superb result.
Awesome
Love the content! have been looking through your videos for an explanation of costs of manufacturing but can’t find any. Just a video idea :)
You are awesome
I love your videos
Amazing!
Prepainting the resin, hmm? Vedy interesting. Vedy interesting, indeed.
I didn't even know rotational casting was a thing, that's so cool. Have you ever done any spin casting? I used to help my uncle mass produce DnD figurines when I was younger and always found it pretty fascinating.
I'm interested to see how a ceramic slip cast works in that mold.
One element of slip cast is to use a mold that will draw the water out of your slip (e.g. plaster of paris) so that the layers of slip will dry out inside a sealed container. I am not sure that would work as well with a silicone mold.
This mould is not for ceramic casting , it's for replicating a pattern to be sent off and cast in ceramics .
@@glenfisher728 Correct. The factory in China will use this pattern to make the molds specifically for ceramic casting.
I love it.
Hello, your videos are very interesting and informative.
I have a question, can the silplastic be painted? Thank you!
Rotation is feeling.
Robert can you do video regarding the stuff you use...I need to get myself that gadget that melt the sticky wax...and also what is those thin sticks you use for venting bubbles pls....also where to buy al those items.
Typically for ceramic molds (though it has been a while for me) your final molds are some version of plaster, which are usually multi-part molds. The ceramic "slip" is predominantly liquid clay; clay with an excess of water. The consistency is usually between Maple syrup and cake batter. Normally you fill the plaster mold completely with the slip and let it set! No rotation is needed since the mold stays filled throughout the process. As the water in the slip migrates into the plaster, it will solidify from the outside in. (Molds need/should be allowed to dry in between uses. They can deteriorate over time due to the wetting/drying cycle.) Depending on the object's size, you will wait several minutes and then dump the still liquid slip from the mold center for use later. You normally do not let the slip totally solidify, depending on the part, you usually only want a relatively thin shell. (Unlike with resins, slip won't go off on it's own other than by drying, and you can usually reliquify it by adding water and stiring.) So you now have a soft clay shell in the mold which you continue to let to air dry in the mold untill it is firm enough to demold and handle; then you let it dry some more. When suitably dry, you do a first firing in a kiln causing to go from very brittle to somewhat robust. Then you can paint and glaze as you go, firing in the kiln as needed to its final "glass like" state. Depending on the slip, just clay up to finer porcelains, there are recipes of times and temperatures to follow, and a fair amont of shrinkages need to be allowed for.
I am very interested in how this silicone mold will be utilized. The detailed surface is very intricate, but the silicone won't absorbe the water? Is the silicone mold being used to cast resin masters for subsequent mold making? Or is it a totally different process from the one I'm use to from 50 years ago? Thanks.
I think it is going to be more of the negative blank maker for the plaster molds since you only need a handful of the resin ones where you'd likely make a three part plaster mold around the negative made from the master mold to make more suitable molds then producing the clay versions via slip casts
Looks great! Do roto castings shrink too?
I know this is an "old video" (for the youtube timeframe) but i was thinking, what if some very thin and soft material was glued to the outer shell's inner face to apply the slightest pressure on the rubber mold to close down the misaligned parting lines? Maybe just lining with paper would add just enough thickness do the trick.
In practice I have found that a shell that fits the rubber blanket precisely gives the best results. Any lining will cause the shell to not fit the rubber blanket and will distort it, resulting in open parting lines. But experiments are always worthwhile so you could give your method a try and see if it yields a good result.
I like this guy--he looks like Bob Newhart.
is it a special resin that is used in the rotary cast ? or can i still used my smooth cast 66D fast dry resin ? and how do you know how much resin you will need to make a strong enough wall coating on the hollow mug
Speaking of roto casting how's that clear globe project coming. 🤔
It’s sitting on a shelf feeling very neglected!
@@RobertTolone I think it needs some love. ❤
Great job! Bob, I love that rotator machine. It’s as perfect as anyone could expect. You make it look sooo easy. I have a question for you. Could you make the hard shell crystal clear so that you could see your parting lines? The “Peanut Butter” shell is like playing Russian Roulette because you don’t know if the parting lines are tight or not. I think if you could see through the “Peanut Butter” hard shell it would be much better. It’s not really Peanut Butter, ha ha.
Very nice jokes uncle Tolone! Keep it up!
I have a question I figured you might know the answer to. I have mugs I 3D print that come with a decorative lid that thread together. Is there a way to mold the internal threads along with the mug? Love the channel, so happy it came up in my feed!
Is there a particular silicone that could be used for making molds to withstand molten metal? Something along the lines of aluminium!
There are silicones which can be used to cast low temp metals such as pewter. I’ve never heard of silicones that can cast aluminum or bronze.
@@RobertTolone I doubted it myself but wasn't sure, so figured i would ask given your knowledge. Thank you for such a fast response though. Out of curiosity, do you happen to know of the particular name for such a silicone for pewter casting ?
That did not have as much shrink, it seems, as the white statue you did a few videos ago. Is that a function of the type of resin or volume of resin?
The white statue was solid so it's mass was greater. This cup was cast in four shots so the resin doesn't get as hot . This is a hollow casting so it's mass is dramatically less. If you poured it solid it's linear shrinkage would be similar to the statue .
What Glen said, also adding that the higher mass also means a higher temperature, so the plastic has expanded a bit while it was still in the liquid and gel states, then shrinks when the material is still in the more solid but still malleable green state.
any source for the silicone rubber bands? I have 2 DIY "motorized" rotcasters i built and honestly...have yet to use them
Look for companies that sell equipment for furniture moving. They likely won't describe them as being silicone, just calling them "rubber", but I'm 99% sure this is the type of band he is using. They are great. They stretch a surprising amount without breaking. I've used them for piano moving to hold moving blankets on.
great video Robert! btw, how do you call the rotating machine? "createl"? "cratel"? my english is not that good and I just dont find that word.
I think he used the word "cradle", but that refers to the part being held in place. Try searching for "Rotational casting machine" if you are searching in English.
The larger wooden frame that spins is the rotational machine. The smaller wooden frame that holds the mold is a cradle. It's the same word used in English to describe an infant's bed (specifically one that rocks or bounces), as well as any container that tends to be matched to the size and shape of what it holds and stabilizes that object within a larger device.
Cradle can also be used to refer to an area or conceptual space where another thing started (i.e. was "born") and/or was nurtured, similar to how a cradle holds and protects a baby while it grows. For example, where I live there's an area/site in the nearby National Forest called "Cradle of Forestry," because that was where the first school of forestry in America was established back in 1898.
Cradle can also be used as a verb. To cradle something is to hold it the way you would hold a baby, or any object you're trying to be careful with.
The cradle is the part that attaches the rubber mold to the rotational molding machine. The cradle is usually custom built for each specific mold.
Thanks for clarifying!
Is that residence safe to drink out of?
Молодцом!
Классный дед ))
BUN HOLE
What is the ceramic process you talked about? is it something that can be made at home?
Google ceramic casting , totally different process to this .
I didn't know Michael Moore got into mold making
I wanna be you.. Simple like that.
viejito porque no eres mi abuelo :(
update your Instagram so i can show you my mold and resin project.
I know, I neglect my instagram. I’m a one-man operation and the days are short. You can send pics to me at roberttolone@yahoo.com.
I dunno why, but that model screams "glove mould" at me. =(
Here 4 the nonsense
lol manual