DIYbanter - View Single Post - Creating very light hollow metal ornaments

(Marin) wrote in
om:

I wanted to create very light hollow metal ornaments that could float
by the buoyancy of the air inside.

If you want them to float in water, then you will need them to be
completely sealed. This is going to be difficult, since relief holes are
needed during the casting and cleanup process. Plan on sealing up some
holes as part of your manufacturing process.

I wanted to use metal because some
parts of the object would need to withstand an ambient temperature of
about 100-150 degrees celsius.

There are many plastics that can withstand those temperatures.

The object shape could be quite complex, for example a flower with
petals or miniture scene with a house or something. I might end up
producing small batches of a 1000 or more.

Easiest would be plastic injection molding. Next best would be lost wax
casting.