No, they aren't. I just published the article on iRobot's patent, that relates to what you are talking about, yesterday in my 3Dprinter dot net website. Go to that site and at the moment it's the fourth article down on the page, "iRobot’s Robotic Fabricator will do the dirty work of finishing 3D prints, according to new patent"
It's a patent for a far-fetched far-fetched device that will use robotic arms to clean already 3D printed parts. I doubt it will ever be made.