The machine main uses are following in rubber product factory: Natural rubber refining, raw rubber and compound mixing. Rubber beating mixing and rubber tab letting. This machine is double roller opening to be used for rubber mixing. It consists of seat, Frame, Rubber, Driving device, Lubricator and cooler, range adjusting device of roller. Safety brake. Motor and reducer, etc. the roller is made from safety cooled and hard cast steel, smooth surface is polished. in term of different case. Saturated steam and cooling water can be inputted in the empty roller to adjust speed of roller. Colloidal particles are drawn into the gap of the two rollers which make relative rotation in different velocity to mix rubber.