Open mixer appear on our society that we all are aware, it is now appearing on our society has these devices are classified, and their classification is not the same as if their function is not the same , like on our open mixer, mixer open classification: double points by shifting FM refining machines, single-FM open mill. Now our country can be so rapid development with these devices are inseparable, so that each device will have so many categories. Our open mixer by heating oil heating method is divided into an open mill and electric heating open mill. Open mill scale according to the size of the drum amount of the size of the selection experiment. Open mill temperature difference in the melting point and the modified data to select the desired temperature, the temperature of the size needed to recuperate. Open mill speed ratio of 1: 1.25. According to the shear properties of materials, custom. FM dual roller mill function arbitrarily set child than the speed. Facilitate different data operation kneading.