Raw material mixing device for rigid polyurethane foam production

The utility model relates to a raw material mixing device for rigid polyurethane foam production, which comprises a mixing box, the lower part of the mixing box is in an inverted cone shape, an annular plate is rotatably connected to the edge of the top in the mixing box, a rotating box is rotatably connected to the bottom in the mixing box, and a plurality of stirring shafts I are rotatably connected between the rotating box and the annular plate; a spiral blade is arranged on the first stirring shaft, a first power mechanism for driving the first stirring shaft to rotate is arranged in the rotating box, a second power mechanism for driving the annular plate to rotate is arranged on the mixing box, a premixing box is arranged at the top of the mixing box, two cavities are formed in the premixing box, feeding ports are formed in the tops of the cavities, and discharging ports connected with the mixing box are formed in the bottoms of the cavities; the feeding port and the discharging port are each provided wi