Sigma Blade Mixers

DESCRIPTION »

Sigma mixers are known as “Universal Mixers” because they are almost unlimited in application. They are equipped to process batches of material in wide viscosity range. The universal mixing and kneading machine consists essentially of a rectangular trough curved at the bottom to form two half-cylinders, with two blades horizontally disposed, and driven by suitable gearing on one or both ends of the trough. The blades sweep the entire area of the halfcylinder on each revolution, revolving toward each other at unequal speed and imparting both transverse and lateral motion to the batch.

Clearance between blades and trough is extremely close so that no particle of the batch can escape the mixing action of the blades, with every particle constantly in motion while the blades are moving. An intensive kneading action is performed simultaneously with the mixing as the material is pulled and squeezed against blades, saddle, and sidewalls. Sigma mixers can efficiently handle mixes ranging in consistency from dry powders to very stiff plastic masses.

Vacuum Mixers serve a very definite purpose in many industries mixing operations. It is often advantageous, and many times imperative, that mixing can be carried out under vacuum conditions. A batch can be economically dried by vacuum which remove solvents or moisture while material is being mixed. Oxidation of sensitive materials can be prevented by mixing; occluded gasses can also be efficiently removed and air will not be worked into mixes.