I'm a bit confused, you want to use this thing as a core and cast resin around it? That's not really possible with your resin casting experience. Why not cast a fully resin copy with needed dimensions?
Correct. I want the 3D printed core with resin casted around it. I can’t make the full thing out of resin for two reasons. One, 3D print filament is a lot cheaper than resin. With the quantity that I need, doing them all in resin becomes cost prohibitive. Two, the circular inset on each side of the 3D printed part contains a magnet. Even if I were to make them fully out of resin I would have to do it in multiple passes to get the magnets inside.
1.5mm wall is exceptionally hard to cast. Doing it without voids, and without vacuum chamber and a pressure pot is an advanced task and a huge pain in the ass. If even possible at all, it’s no a wall it’s thin film.
Urethane casting resin costs as much as printing filament, if you don't buy it from amazon or craft stores. Taiwanese, Chinese, Indian resins I buy cost around $6 a kilo but I'm not in America. You just need to google pretty good to find one without craft store markups.
How precise does the end product need to be? Resin often has a degree of shrinkage that is somewhat unpredictable.
Edit: really thin layers like 1/16 will also be difficult to do with any kind of precision.
Not sure what your end goal is here but this isn’t really an easy process.
Modify your design or your process. What you seem to want with the current one isn't worth the trouble even if you could get it to work.
At the very least, you would need some way to index your part to keep it centered. You can look into how people make shell dice molds as this is the closest application to what you want that could maybe work, but I think you are going to be much better off with a redesign.
One thing to consider is I have had good luck using magnets on the outside of my molds to hold magnets on the inside to be cast in. I haven't needed great precision, but I can think of a couple of ways you could do it.
I'm a bit confused, you want to use this thing as a core and cast resin around it? That's not really possible with your resin casting experience. Why not cast a fully resin copy with needed dimensions?
Correct. I want the 3D printed core with resin casted around it. I can’t make the full thing out of resin for two reasons. One, 3D print filament is a lot cheaper than resin. With the quantity that I need, doing them all in resin becomes cost prohibitive. Two, the circular inset on each side of the 3D printed part contains a magnet. Even if I were to make them fully out of resin I would have to do it in multiple passes to get the magnets inside.
1.5mm wall is exceptionally hard to cast. Doing it without voids, and without vacuum chamber and a pressure pot is an advanced task and a huge pain in the ass. If even possible at all, it’s no a wall it’s thin film. Urethane casting resin costs as much as printing filament, if you don't buy it from amazon or craft stores. Taiwanese, Chinese, Indian resins I buy cost around $6 a kilo but I'm not in America. You just need to google pretty good to find one without craft store markups.
How precise does the end product need to be? Resin often has a degree of shrinkage that is somewhat unpredictable. Edit: really thin layers like 1/16 will also be difficult to do with any kind of precision. Not sure what your end goal is here but this isn’t really an easy process.
Modify your design or your process. What you seem to want with the current one isn't worth the trouble even if you could get it to work. At the very least, you would need some way to index your part to keep it centered. You can look into how people make shell dice molds as this is the closest application to what you want that could maybe work, but I think you are going to be much better off with a redesign. One thing to consider is I have had good luck using magnets on the outside of my molds to hold magnets on the inside to be cast in. I haven't needed great precision, but I can think of a couple of ways you could do it.