Which combined machine units mainly used batching,mixing,coloring and drying for various resins, such as PVC,PE,PP,as well as the drying and devolatilization process of engineering plastics such as ABS and polycarbonate before shaping, It also can be used for phenolic resin. This unit has combined the technology of hot mixing and cool mixing,which can let the material enter cool mixing after hot mixing automatically so as to cool it and removal of residual gas to prevent blocking.