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.


bwrussell3 months ago

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

rickharris3 months 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.

Downunder35m3 months ago

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