Idea to Sketch to 3D Print to Plaster Mold

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Shape Cast: shapecastmolds.com
Want to go from an idea of a pot to a custom plaster slip casting mold? Here I walk through the process of starting with an idea, designing the profile, using Shape Cast to create 3D printable models for plaster, assembling the 3d printed mold, pouring plaster, and slip casting a pot in the new custom mold!
TOOLS and MATERIALS (affiliate)
- Calipers amzn.to/4dXKT4l
- PLA+ amzn.to/3QrWnnt
- Filler Primer amzn.to/3P69Yye
- 220 sand paper amzn.to/4bYyNX2
- CA glue and activator amzn.to/3x6fkEK
- M3x8 screws amzn.to/3qensjc
- M3 threaded inserts amzn.to/3OrJl6W
- Driver amzn.to/44TsHDY
- Foam Gasket amzn.to/44X7IAf
- Soldering Station amzn.to/3KnlBiM
- Diamond sanding pads (120 & 200) amzn.to/3P6Awj0
- Razor Blade amzn.to/3Kpfydn
- Drill Attachment Mixer amzn.to/3OP9iiv
- Spigot amzn.to/3u4t95n
- Motorcycle lift amzn.to/3unWK9M
- Step drill set amzn.to/49gXOLp
- Socket amzn.to/49dJ2VX
- Socket adapter amzn.to/3vX3Tys
- Buckets amzn.to/49eCupX
- Bucket lids amzn.to/42jbljn
- Knife amzn.to/3Opr2jv

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Опубликовано:

31 май 2024

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Комментарии : 15

@mrfochs Месяц назад

I made my first mold from Shapecast a few weeks ago. I can say, without pause, if you can print in ABS or ASA - do it! I could acetone weld the pieces and then do a very light vapor smoothing for the center plug. The finish quality of the mold is better than when I used to mold existing objects/glasses.

@PotterybyKent Месяц назад

That's great to hear!

@mrfochs Месяц назад

@@PotterybyKent I have spent the last two days refining my second mold form in Shapecast and was wondering if there might be a way to have the system generate the final mold as three parts-the bottom and center plug as a single item and then the two outer shells. Also, is there a way to export the center plug so that the flange that holds the threaded inserts does not create a cavity that requires support? If not, depending on how the forms are generated (I would assume some version of OpenSCAD), can the files be exported in .step or a similar format to allow for easier post-export modifications (I am playing with the idea of cutting out a small shallow "trench" to insert 1.75mm TPU filament like an O-ring gasket - something I have done with small epoxy molds in the past)? I ended up taking the STLs for the center plug and two bottom halves and throwing them into Windows 3D Builder so I could merge them together along with a custom solid to fill that tiny gap/shelf in the center plug and screw holes that were no longer needed. However, since working with an STL with thousands of triangles, the end merge was a bit "dirty."

@PotterybyKent Месяц назад

The short version is no, that's not possible right now with the way the code is set up.

@sublimationman Месяц назад

For the areas that need more filling (like the bottom) try spot putty (it's like a toothpaste version of filler primer) just put it on , use something smooth to spread it out and smooth as best as possible, let dry 30 minutes and sand, then you can use a single coat of the filler primer if needed (to hide the sanding marks).

@PotterybyKent Месяц назад

Thanks for the tip!

@HipNerd Месяц назад

The cold alcohol trick to shrink the PLA was something I haven’t seen before.

@PotterybyKent Месяц назад

It works really well! Before that I had struggled many times getting the print to come out of the plaster.

@simbico Месяц назад

Hi Kent, thanks for the cool workflow demo! Have you tried printing TPU gaskets?

@PotterybyKent Месяц назад

Happy to share! TPU could work, but I haven't used it. One of the things I was originally considering was just a rubber gasket (o-ring style) however I didn't go down that path since the tolerances would need to be tighter. The gasket works remarkably well for keeping the plaster helps back.

@user-xr3mf8lw5c Месяц назад

This is a brilliant integration of modern maker tech and the ancient craft of ceramics. I have an architecture background but I teach ceramics in a high school. I'm looking forward to incorporating these ideas into our workflow next year for my intermediate/advanced class. I love the idea of 3D printing a master mold, so that I can have my students make multiple copies of the plaster molds for the entire class to use. One question I have is: have you tried using mold bands with your 3D printed pieces, with a gasket in place of course, rather than the threaded inserts and bolts, if so, how did it work? Just thinking about the time and budget I have for mold making. Thank you for these great videos and for shapecast!

@PotterybyKent Месяц назад

Glad to hear that! I tried several things to close up the outer mold. I've used foil tape in the past with success but I find it a pain. If you want to go slow and steady - caulking is also ok. You just need to wait for it to cure. The threaded inserts actually go pretty fast, are cheap, and are good insurance against a plaster disaster. With mold bands, you wouldn't be able to securing down the inner mold (and I'm not sure they'd work for the outer without leaking).