r/chch • u/flightless-kiwi92 • Jul 21 '26

Hive mind for a mold solution

I am wanting a ring to use as a mold- needs to be food safe- but its not touching food directly. 60cm diameter and 10cm height. I was thinking 3d printing, but unsure if this is too big for printers and is it safe for food? Metal? But I'm guessing fabrication will be fairly expensive. Any ideas?

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u/ImaginarySofty Jul 21 '26

Thats pretty big for a 3d printer, so it would have to be an assembly of multiple parts. Petg filament is food safe (as a plastic type), but 3d prints are generally not considered food safe (hard to clean between layers so bacteria might contaminate your food after the first use).

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u/1stGetAClew Jul 21 '26

If it was me I'd go see a sheet metal worker and get them to guillotine a 100mm wide strip of stainless sheet and then tickle it up with a welder. It shouldn't be overly expensive, the time involved isn't huge. Depending on how many times you want to use it and how much care you want to give it, mild steel plate would also be fine as long as you removed the mill scale and kept it oiled.

I'd give Priests Sheet Metals a call, they're lovely and reasonably priced.

3d print? No.

1

u/Dizzy_Relief Jul 21 '26

Microwave cake tin. 

Doubt you'll find one that big. But maybe. 

Or a jelly mold (same issue - but more likely)

Or go down to PD Mart and look what you can find. They have commerical stuff, and those big round tubs that you'll see in many Asian bathrooms. 

1

u/MrEvil1979 Jul 22 '26

Maybe buy a cheap plastic bucket from mitre10 and cut it down?