Silicone Rubber Sigma Mixer

Two counter-rotating Z-shaped blades (often at different speeds, typically a 3:2 ratio in tangential design) create intensive bulk movement, stretching, folding, dividing, and recombining of the material. This shearing and tearing action against the blades and trough walls ensures thorough mixing without dead zones.

The mixer is offered in Stainless Steel 316, Stainless Steel 304, or Mild Steel. Stainless steel versions can have matt or mirror polish finishes as required, while Mild Steel models receive one coat of red oxide and two coats of epoxy paint. PTFE shaft sealing is provided for food-grade compatibility.

Yes. A jacket for heating or cooling can be fitted, with optional mineral wool insulation and cladding. Blade cooling arrangements are also available as accessories to maintain precise temperature control and protect heat-sensitive formulations.

Discharge can be by hand-wheel operated (manual) tilting, hydraulic (automatic) tilting, bottom valves, or an extrusion screw. These options allow efficient, complete unloading of the sticky, high-viscosity product.

Models range from ASM-50 (approx. 50 L working / 80 L gross capacity) up to ASM-3000 (approx. 3000 L working / 3800 L gross capacity), with corresponding motor powers from 5 HP to 120 HP depending on general or heavy-duty requirements. Power voltage can be customized.

The close clearance between the trough inner shell and the blades minimizes product sticking and stagnation, ensuring efficient mixing, easier cleaning, and reduced material waste when handling highly adhesive silicone compounds.

Yes—vacuum systems and liquid spray systems can be supplied on demand. Vacuum removes air bubbles for denser, higher-quality silicone rubber, while spray systems allow controlled addition of liquids or additives during the mixing cycle.

Tangential blades (rotating at different speeds) deliver stronger kneading and shearing and are preferred for higher-viscosity materials such as rubber compounds. Overlapping blades (same speed) provide faster material interchange and suit lower-viscosity formulations, with comparatively milder kneading action.

Yes. Features such as stainless-steel construction, mirror or matt finishes, PTFE seals, minimal product-stagnation gaps, jacketed troughs, and hydraulic discharge support clean operation. Optional vacuum, spray, and cooling systems further adapt it to specific process and quality requirements.