Machining & Casting an Aluminum Mold for Smooth-On Urethane Rubber (Part 2 of 2)

[wmalongboarding]

if i want ot make a wheel out of the PMC-780 How do i measure out the right amount for 4 wheels

[saunixcomp]

@wmalongboarding Just buy some and experiment. Or you can calculate the volume of the wheel.

[wmalongboarding]

how hared is it an i mould it into a wheel?

[saunixcomp]

@wmalongboarding Easy

[nbaietti]

OOOOOOOOOOOOOOOOOOOOOOHHHHHHH it's for cushioniiiiinnnnngggggggg.... I was wondering what tha heel you would do with a gear like that! hahaha...

amazing, buddy, but you sure have invested a lot of money on that, thats not for everyone. well... interesting video. thanks.

[lclore]

nice detail, well thought out. you are saving me a bunch of time! did you polish the inside of the mold? If not, were any of the machining lines visible in the casting part? Thanks for posting this- really good stuff.

[saunixcomp]

@lclore No, did not need to polish inside of mold. No machining lines visible either.

[Culturedropout]

Nicely done! I've just started playing with Smooth On castable plastic to make playing pieces for a game, myself. It's quite a bit of fun to mess with, although I've had some problems with tiny air bubbles showing up in the castings. I bought an old pressure cooker for $3 at the local Goodwill and hooked it up to an old vacuum pump we had sitting around, so with any luck, this will degas the material and prevent bubbles. We'll see...

[jcims]

Just a thought, if you have any parts that might retain bubbles, you could pick up an HVAC vacuum pump and fashion a bell to house your mold while it's setting up.

Might be a huge waste of time and money as well, just a thought.

Parts looked really good btw. Great video.

[reaquiloreal]

Very nice job and congratulations! I want to see more videos!

[adisharr]

Hey those came out really well - great job as always. By the way, what kind of work do you do - just curious?

[japroach]

Great post.

Did you get the other copper/sheet metal molds to release, or did it tear?

[saunixcomp]

the copper tube tore, but if I had spent a bit of time, I may have gotten it out OK... I was able to remove the washer and the sheet metal box relatively unscathed. It's clear that the mold release is important, though.

[YuddaLevy]

Inspirational set of videos...i said to myself....make a mold ? cast it in urethane ? NO way i could do that ..... after this .... i bet i can ....great job.