◆ Concrete
Ring holder dish mold
A round ring dish with a ring cone in the middle, cast in one piece in Jesmonite or concrete. From a silicone mold you make yourself.
◆ Concrete
A round ring dish with a ring cone in the middle, cast in one piece in Jesmonite or concrete. From a silicone mold you make yourself.
A round ring dish 94 mm across with a ring cone standing in the middle of its 10 mm deep well. The cone is 24 mm across at the foot and rises 28 mm off the floor to a rounded tip, so rings slide down it to where they fit, and earrings and a watch go in the well round it. It stands 34 mm tall to the tip of the cone.
Made with our tray mold generator in its flexible silicone tray mode: print the caster, pour silicone into it, peel it out, and that silicone is the mold. The dish is cast upside down, so the cone is a pit at the bottom of the cavity and the flat back of the dish is the pour face. Cone and dish come out as one piece, with nothing to glue.
The mold holds one dish on purpose: the cone sets the depth of the whole silicone block, so a second cavity would double the silicone. The zip carries the printed caster exactly as the tool exported it, one dish on its own as an STL, the master uploaded to the tool, and a print and pour sheet with the silicone figure the tool measured.
Shown as a 3D render of the printed caster with three concrete dishes in front, not a photo.
Print the caster as exported, open side up. It is one part, so there are no seams to seal. No supports.
Mix 344 ml of silicone in one batch and pour it into one corner of the caster in a thin stream, letting it rise over the dish shapes until it is level with the rim. Tap the caster on the table for a minute and let it cure for as long as its datasheet says.
Peel the cured silicone out of the caster. That silicone is your tray: the dome in the middle of each cavity is what forms the well of the dish.
Spoon a little of the mix into the cone first and work it into the tip with a cocktail stick, then fill the cavity to the brim, about 77 ml, and tap the tray on the table for a minute so the air lifts off the tip and the lip.
Leave Jesmonite about an hour and concrete a full day, then flex the tray and peel it back. Sand the back flat and seal the dish once it is dry.
Print details
| Cast material | Concrete |
|---|---|
| Printed parts | 1 |
| Size (W x D x H) | 108 x 108 x 49 mm |
| Print bed needed | 108 x 108 mm, 49 mm tall |
| Filament | ~95 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: printed caster (STL) + one dish (STL) + tool master (STL) + print and pour sheet |
| Added | 2026-09-26 |
Pro early access until October 26, 2026, then free with any account.
Like it or post your print on Thingiverse
Make your own tray mold →Made with the free Tray mold generator. Upload your own model and get the same kind of mold built around it, in your browser.
Free for personal use. Selling the pieces you cast needs a commercial licence (Pro or Founder); passing on the file itself is not permitted on any plan. Full terms.
New to casting? Read the ice cube tray mold guide.
The tip is the deepest point of the mold, so air collects there. Spoon a little mix into the cone first and work it into the tip with a cocktail stick, then fill the rest and tap the tray on the table for a minute. A slightly runnier first spoonful helps it find the point.
Pour the cone and the dish in one go so they cure as one piece, and use Jesmonite or a fine mix with no gravel: stones jam in the narrow tip and leave it weak. Demold gently, peeling the silicone back from the rim first, and let a concrete dish cure for a week before it holds anything.
The cone is 24 mm across at the foot and 6.6 mm at the rounded tip. Most adult rings, about 15 to 22 mm inside, come to rest between 3 and 14 mm above the floor and stack there; children's rings and midi rings sit higher up.
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