Robinson was acquired on waivers from the Nuggets on Tuesday.
He made the most of limited playing time on Friday, scoring nine points and grabbing nine rebounds in just 13 minutes. That included a five-point outburst in just three minutes of action as the Sixers iced the game in the fourth quarter.
"He's got energy," Sixers coach Brett Brown said of Robinson's production.
The Sixers next play at the Pacers on Sunday night.