DIY Foundry: Demolding Foam+Petrobond Experiment

Demolding my an address sign for the house, which I cast from aluminum using a simple investment casting technique. See my other video for the pour. The pattern is foam, which is vaporized by molten aluminum, which then fills the cavity.

I design plastic housings for a living and so constantly think about the part as it exists in a mold. A lot of effort goes into designing parts that are manufacturable and then chosing gating and mold constructoins that work.




Some of that experience has been proving useful in my DIY casting efforts, even though plastic injection tooling is a totally different world.

If there's interest, I'll keep posting videos of my metal casting experiments.

Category:

Howto & Style

Tags:

• DIY
• Foundry
• petrobond
• investment
• backyard
• casting
• gating
• vent
• demold
• sand
• cnc
• foam

[amaedesign]

Thanks guys for the nice comments!

[ArtistBlade1972]

Will green sand work ok for lost foam?

[Rathrider]

how do you make petrobond, or how much does it cost?

[Stain5150v]

That's good work.

[Ingibjorg97]

what the hel is this :@

[dtr125er]

@junkman6261 because the foam is lost,forever! simple as.

you can get petrobond at any foundry supplier or casting company.

i picked some up from an art bronze casting company.

[junkman6261]

why do they call it lost foam and where do you get petrobond sand?

[HEAVYSNIPE123]

thats perfect! for lost foam cast!

[Marcelmx3]

Looks great !