Internal mixer

摘要

Disclosed is an internal mixer in which two rotors are operated at both the same speed and different speeds. In two communicating cylindrical closed spaces which are round in cross section, two rotors connected with two output shafts of a speed reducer are juxtaposed in a non-engaged state, to transmit the driving power from the prime mover to the speed reducer, thus turning the two rotors in opposite directions. In this internal mixer, the two rotors is usable both at the same speed and at different speeds because of the use of the speed reducer having two output shafts whose speed of revolution is changeable between the same speed and different speeds.