there hasn't been an easy way invented yet to do what you are inquiring about.
like Darren said, there have been some tire companies or independents that have engineered some sort of way to do this but as of yet nobody has invented a machine to remove the rubber off the press rings easily and safely.
So its either cutting, heating the bond and brute forcing by press, or burning the rubber off.
This is an open concept begging for someone to invent a machine to do this task. ;o)