Sigma Mixer

The sigma kneader is a double arm mixer with extruder, the two "Z" blade rotate towards each others at same or different speed inside a W- shaped product container and extruder screw is located between the two blade with separate gear motor drive. The extruder screw is rotates in forward direction for extruding process and rotate in reverse direction during mixing process. Speed of the extruder to be adjustable by VFD. The twin screw basin kneading machine with two horizontally arranged kneading blades, which are deeply geared into one another and strip themselves reciprocally. Each blade moves the material in opposite direction thereby providing excellent cross mixing of all raw materials. The blades pass the trough walls and each other at close clearances resulting in good mixing. The close clearance produces a shearing and tearing action that is beneficial to the size reduction of solids.

The extrusion screw is located in the saddle section and runs in a cylindrical trough tangential to and below the 2 mixing blades.

• When the product has finished the mixing cycle, discharge/extrusion is performed simply by running the extrusion screw in a forward direction.
• The double arm sigma blades normally continue to run throughout the extrusion process providing a thoroughly mixed product at all stages of the production cycle.
• By changing the extrusion die heads, the product can be discharged in round, square, "spaghetti", or any form desired.
• Speed variation of the extrusion screw allows adjustment of the product flow, depending on the viscosity.