idk, I guess it could work. But if I imagine a machine which rapes, I would like it to be sexy. So I would like to have it vibrating strongly and doing in the vagina, and maybe also stimulate the clit somehow. Also, I think there needs to be something which cleans the rod after use so the rape machine doesn't transmit any STDs. And I also would like a different ending. So essentially it should do it for longer. I don't know if it would be technically feasible, but if there were sensors which could detect an orgasm (and not allow it to be faked), it could rape the slut till she has an orgasm (or maybe a higher limit it it works mostly, or maybe up to e.g. 20 minutes or some other time where we can at least make her sore). By that, she would be forced to try to "enjoy" it to make it last for a shorter period of time. This could be a nice mindfuck. The machine should also somehow threaten the slut, also to others, so that if someone comes too close (to try to "free" her), it could threaten to kill her. In the end, hitting her with a blunt object could be dangerous and I don't like it for a rape machine. Maybe it could inject some (short-term) tranquilizer so that you can sure that she cannot destroy the machine afterwards? Or, depending how expensive they are, leave her with time-gated restraints and a blindfold.
But if we were really devious, we could freeze our sperm, store it in the rape machine and inject during the rape or maybe at the same time as they have an orgasm so that we can try to make them pregnant.
(Everything in minecraft, of course)