Hollow semi circle split into half that needs to open when pulled?

Hi - we need to build a semi circle shaped hollow object that is split in the half vertically. And we plan on sliding the 2 halves of the semicircle on tracks so we can open it to reveal something inside. Kinda like a semi-circle door.. any guidance pls on material we can use? The semi circle needs to be about 2 feet in diameter.


bwrussell11 days ago

Find a big serving bowl. A restaurant supply store is probably your best bet for one that's affordable and that large.

rickharris11 days ago

Your best bets will be:

1. Look around the hardware and toy store for something already made.

2. Get a beach ball/weather balloon and make your dome with papier mache https://www.google.co.uk/search?q=how+to+papier+ma...

3. Make a pattern and vacuum form a plastic sheet over it. https://www.instructables.com/howto/vacuum+former/

4. form a card dome using geodetic principles https://www.instructables.com/howto/cardboard+dome...

5 https://www.instructables.com/howto/domes/

A lot depends on how smooth you need this to be.

Plastic drums?
Already round and the rest should be possible by heating, forming and if doubt plastic welding.