Hollow Cast A Complex Part - Brush On Silicone Mold, Part 3

[@fredrikoregard832]

Awesome! You are so talented! I got really inspired to try out my own project.

[@levinebette15]

Amazing at how you build this mold! A cliff-hanger!

[@RobertTolone]

Haha, less a cliffhanger and more I just ran out of time this week. But we’ll get it all done for next Friday!

[@levinebette15]

Robert Tolone, but cutting it open is the best part!

[@RobertTolone]

I know! It’s one of my favorite parts of any job.

[@vsmash2]

This rocks! Great work man!

[@RobertTolone]

Hey, thanks so much for watching!

[@theantichrist6524]

Looking forward to next week's episode

[@dianeharris2687]

Complicated project. Very interesting!

[@RobertTolone]

Next week should be a little more action packed. Lots of little steps to prepare the mold for casting.

[@rrdavis55]

Hi Robert. Thanks for all of the great videos. I was wondering if you are a member of the masons or Knights of Columbus. The reason for asking is that I’m making a project to display fraternity symbols of any kind. I’m basing my design on a piece of jewelry that’s about the size of a large marble maybe 12 mm. Years ago I toyed with plaster casting so I thought of constructing the model from plaster. My ball is 7” in diameter and consist of six nodes that fit together to make the ball. So far I have two rubber molds (thanks to your guidance). One will bolt together into a center block. The other has been quite a challenge to incorporate the hinges which are strong enough to accommodate the castings which are about one pound each. I look forward to hearing back from you. Once again thanks for sharing your years of knowledge. What I would like to do is make a ceramic mold so the nodes can be made hollow and have some of the great finishes that can be fired on them. Hope to hear back soon. Ron Davis 32nd Degree Master Mason Evansville Indiana Sent from my iPhone

[@dawnkarti7767]

Great video❤️❤️

[@RobertTolone]

Thanks for watching Dawn!

[@RobertTolone]

Hey everyone, sorry for any weird glitches that appear in this video. They are not in the original file! It seems like they’re different every time I watch the video. Oh well, perfection is elusive! 🤪

[@roger.agburn]

Hi. =) I just would like to leave a little feedback but could not find a private message button for it. At 0:35 the loudness of the video changes pretty much all of a sudden. Since this is not a horror movie with jump scares ;-) things like that can be very annoying for headfone users. It happens sometimes between shots and maybe you want to even the loudness level out a bit when there is so much difference. Anyway another lovely video. My journey comes closer to the end, not much unseen videos left for me on the channel, and then I will have to wait for the next friday. 🤪

[@monodo56]

Roger Agburn Yes, definitely a volume change there! Once again, perfection has eluded me. Oh well, I try hard to improve with each video and I appreciate you feedback and your patience.

[@الشارع_العقارى]

so good

[@RobertTolone]

Thanks!

[@kevinshort5934]

Great video can you reference silicon rubber product used

[@kevinshort5934]

OK I should've read the comments below I see where the product is are you local in Southern California

[@MrSverh]

Hi Robert, I am pretty new to this (actually it is my first time) silicone molding projects... I want to make a dish like shape (diameter appr. 23cm) in molding so a can cast it in epoxy resin... I bought all the equipment but cannot find the Polyethylene minifibers... can you recomment some for me?

[@davidwardle6712]

Hi Robert, were you ever a teacher? Because you are excellent at your explanations. First rate. I love watching just for the sake of learning about casting, moulds, etc. I do have a question. I am wanting to duplicate an old football player papier-mache bobblehead so I can paint it up with my favourite team's colours, etc. I can see myself using the rotational hollow casting for recreating the body but I am stumped with how I can cast the head. What is giving me pause is how to deal with the big gap at the base of the head. I don't know how I can fill that gap on the original head so I can create a hollow cast of it. Any ideas? Have you ever done a casting of a retro bobblehead? Thanks, Dave

[@RobertTolone]

David Wardle Early in my career I taught at Art Center College of Design. I have done bobble heads, send me pics of your project and I’ll take a look at it. [e-mail] Thanks!

[@edwardmurray2284]

Do Polyethylene minifibers reduce the elasticity or flexibility? How would you compare this to Thyvex? Does this save money as a filler?

[@beastlybombers]

Why are bubbles in the mold a problem especially in the outer coats of silicone?

[@RobertTolone]

Because if there are air bubbles in a rubber mold they collapse when the mold is put under pressure to prevent bubbles in the casting resin. And that collapse can distort the mold which causes the casting to be warped or parting lines to open up and cause lots of flash. The goal is always no bubbles in either the rubber or the resin.

[@SteveK139]

Love your videos! Can you list the actual name of the two (pink and blue) different brush on rubbers you used in this video? Thanks!

[@RobertTolone]

It’s Econosil 25 from www.silpak.com. It’s their least expensive tin-based silicone rubber. It can be used with various catalysts. The blue catalyst is used for pouring molds. The red catalyst is for brush-on molds.

[@foddorais1422]

If you had to do let's say 500 casting of those, would you use the same type of mold?

[@RobertTolone]

If I had to cast 500 of these the first thing I would do is re-sculpt it so that it would be much easier to cast. Then I would calculate how many castings I could get from each mold and then make enough molds to produce all 500. Also I would build a few computer-controlled rotators and program them with the proper rotation pattern. For a run that large those machines would pay for themselves in labor savings. Either that or I would send the whole job overseas and let a factory do it there! Which is exactly how they made this one.

[@amilcarmiguel7274]

🥇🇧🇷Brasil

[@ItsWenzday]

Can I come and live at the shop for a week? I'll need to 'butter the wife up' though, so she will sign my permission slip. Awesome Stuff! Gold Nuggets everywhere in the videos.

[@RobertTolone]

Glad you enjoyed it. Thanks for watching!

[@TheVineyardFarmhouse]

Looks like chicken rotisserie

[@edwardmurray2284]

It really sounds like someone elses voice occasionally.

[@RobertTolone]

Edward Murray There’s always room for improvement!