Internal mixing device for EPDM rubber processing

The invention discloses an internal mixing device for EPDM rubber processing, and relates to the technical field of EPDM rubber internal mixers.The internal mixing device comprises a rack, an internal mixing bin and an overturning oil cylinder, a first rotor and a second rotor are rotationally connected in the internal mixing bin and are in transmission connection, the end of the first rotor is rotationally connected to the rack, and the end of the second rotor is rotationally connected to the overturning oil cylinder; the overturning oil cylinder is used for driving the internal mixing bin to overturn with the first rotor as the center, a discharging opening is formed in one side of the internal mixing bin, the cabin door is hinged to one side of the internal mixing bin, a center shaft is rotationally arranged in the cabin door, and a roller shaft is fixedly connected to the exterior of the center shaft; when the internal mixing bin is turned over and unloaded, the bin door is passively opened, an inclined p