PM series of spiral type color mixer utilizes its fast rotating spiral blades to take materials at the bottom of the barrel to the top and then throw them down to the bottom of the barrel again. In this way, materials are mixed and stirred. Thus, a great number of materials can be mixed evenly in a period of time.It mainly applies to the stirring or color mixing of all kinds of granular materials and solid plastic color master batch.  http://www.plas-auxiliary-machinery.com/