You put the board in, and then backfill the compartment with a low melting paraffin wax or a silicone oil. The wax or oil does 4 things:
- Prevents most solder oxidation.
- Acts as a viscous medium to slow part separation form board
- Prevents rapid temperature cycling of parts thereby minimizing risk of thermal shock.
- Acts as a heat transfer medium
See the figures:
And:

In the embodiment I'm thinking of, each compartment has an electrically resistive heater, either a potted into place heater or an element heater spot welded or brazed to the compartment walls.. Alternatively, you could circulate a heat transfer liquid through a "water jacket" machined/cast into the compartment housing.

Hi
ReplyDeleteI have thought about this for years, and considerable force is needed to remove through-hole components, like 10..100G. Filling the centrifuge with liquid would make it very heavy and expensive.
Better use hot air, which can be blown into a spinning container.
Also, each PCB would need a custom support structure to keep it in shape. This would best be done in a low-wage country where the components can be re-used.