Using professional high-speed valve and reverse screw stirring technology and continuous weightlessness control technology, precise proportioning of raw materials and mixing can effectively avoid chromatic aberration and reduce labor. The unique continuous weightlessness control technology, fast and accurate control of the extrusion output, combined with thickness / gramme effectively save 2% raw materials. The Gravmetric batch blender series can freely combine 2, 3, 4, 5, 6,7, 8 kinds of raw materials according to needs, The output is as high as 500KG/H.