Automatic! 3D Printed Outer Mold for pouring Plaster for Slip Casting 

Really nice work, Kent!

Very good progress 👏 👌 Thanks for sharing 👍

Really nice work, thought and experimentation ... just getting better and better. Maybe add a large central pull handle for the centre mold as well as some channels for the outer mold that are sealed with wax at the bottom to stop the plaster leaking up but that when you blow with compressed air it blows the wax out and you get an air all the way down to the bottom to build pressure for an easier release for the outer as well. You could also build the centre mold from 2 parts and join them with the wax so that they are also eaiser to remove. All some random ideas to try and play with.

Great video! My "lazy" approach for such joints is blue painter's tape. It's worked well over the last couple of years.

Thanks!

Awesome work. For the adhesive, I use a gorilla glue stick and glue gun which helps with speed and accuracy. Then using a pipette and squirting a little denatured alcohol onto the glue releases it easily. Not sure why that works, but it’s great for sealing and releasing molds (I usually work with silicone rubber so I look for an water proof seal). All available from hardware store too, which makes it convenient!

I really love Seeing people mix traditional and modern mediums to streamline and push what's possible in these kinds of applications. I have a project I am currently trying to mixed 3D printing and slip casting as well. If you'd be willing, may I email you to pick your brain and get your opinion on a few things? Much appreciated, and keep the vids coming, these are so helpful!

For demolding the center form, you could give the walls some inward protrusions with a ring on the end, so you can pull/peel the wall directly away from the mold, either enough to demold or enough to get some compressed air in the gap.

Hi Kent, found your channel by chance, and been loving the videos, are there any plans to talk about creating master molds for 2 part molds? An automation for an Inverted of the 3D print would be super cool.

Nice ideas about making the pattern and the mold container. I'm always trying to find the container for a mold and cottle boards are a pain.

Seems like you could add threading to both forms to attach to the bottom ring. Just screw them in, though getting them off would be hard.

Keep me in mind for the software

Hi, thank you for your videos, that's a fascinating process. I am thinking to get a 3d printer for that purpose. I was just wondering about the horizontal lines that transfers to the final piece. Did you ever try to sand the 3d printed pieces to avoid those lines?

Excellent work Kent thanks. What 3d printer do you use

Have you thought about printing TPU. It’s flexible so you may be able to demold more easily. You may have to play with thickness for strength.

Great job Kent. I’ve been working on a similar solution but not for slip casting but to make a jigger mold. It’s all one piece. message me if you want the stl

Fabulous thinking “outside the box”! Is the 3d printed plastic model friendly to sanding to remove the artifacts before casting? Thinking out loud, it would save time cleaning each cast. I know very little about 3d printing… perfect reason to enroll in a continuing ed class at the local college ❤ you’ve inspired me to think about my pottery studio in a completely different way.

Hey Kent, instead of doing a relief cut on your outer mold, you might want to try murphy's oil soap as a mold release. I think it would work well and you wouldn't have to do a cut. Also, maybe there's a way to seal the bottom ring? Before I saw the ring I was thinking the 2 pieces could be pushed down into a clay slab. I've done that before with casting and it works well, but it's a bit messy getting wet plaster on the slab if you want to salvage all of the slab later. Just my thoughts. Thanks for another great video.

How many hours of printing is it to create the cottle in 3d print? I think it might be simpler to press your form into clay at the base and then wrap it with a sheet of metal ( got mine in the hardware store roofing section) I sealed the overlap with duct tape. I have also seen people do the same but use stiff plastic sheet also and seal the overlap with dog clips.

Hi ! Nice work ! I tried to suscribe at your waiting list but I dont think it worked. Thank you !

One use for TPU would be a 3D printed "knife" specifically shaped for trimming the "sprue" (I know it's not really a mold sprue...). Might be a bit less awkward. :)

Have you tried combining the bottom circle and the inner mold into one piece? That way you would only need one seal on the outside.

Would you ever just leave the outer mold on for bump protection around the workshop? Or would it impact the plaster's moisture wicking?

whats that foil you put underneath?

What type of plaster are you using? “Hardware store” $, or “Potter’s” $$ plaster?

The pot forms you are making look like tradition wheel thrown pots. One of the advantages of cad design and slip forming is that you can create non traditional shapes.

Lovely work. A little over complicated with the sealing though. Why not just use a traditional bead of clay. It will take seconds to apply.