High Mixing Efficiency Sigma Blade Mixer For Silicone Rubber Product

The mixer features specialized tangential Z-blades with precisely controlled micro-gaps between the blades and the inner shell wall. This design ensures continuous material movement, complete contact with the trough surfaces, and virtually no dead zones or product buildup.

The unit can be fabricated in industrial-grade SS 304, high-spec SS 316, or structural Mild Steel. Stainless steel exteriors may be finished in brushed matte or mirror polish. Mild-steel frames receive a red-oxide primer plus two coats of epoxy paint for corrosion protection. PTFE shaft packings provide sanitary, food-grade sealing.

Yes. Optional jackets allow external heating or chilling. The jackets are insulated with mineral wool and protected by metal cladding. Automated sequences can switch from heating to cooling after the required process time, and optional blade-cooling arrangements are also available.

Models range from ASM-50 (approx. 50 L working / 80 L gross) up to ASM-3000 (approx. 3000 L working / 3800 L gross). Motor ratings vary by capacity and duty (general or heavy-duty), from 5 HP to 120 HP. Voltage can be customized to the customer’s local power supply.

Three primary methods are available: tilting the entire mixing trough (manual hand-wheel or hydraulic), draining through bottom dump valves, or extruding via a side-mounted screw. An automatic valve discharge system is offered as an optional accessory.

Available options include liquid atomization spray systems for additive incorporation, hermetically sealed vacuum chambers to remove air and volatiles, blade cooling arrangements, screw extrusion discharge, and automatic valve systems. Variable-speed drives and PLC automation can also be integrated for process control and repeatability.

Tangential (non-intersecting) blades running at a typical 3:2 speed ratio provide intensive shear and are preferred for heavy, high-viscosity silicone and rubber compounds. Overlapping blades rotate at matched speeds, produce milder shear, and are better suited to freer-flowing materials.

Standard mixers struggle with the sticky, high-viscosity nature of silicone compounds. The Sigma design generates continuous mass transfer, elongation, folding, and high shear against the blades and trough walls, ensuring uniform dispersion of fillers and additives without residual unmixed material.

While optimized for silicone rubber and high-viscosity rubber compounds, it is also widely applied in pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries for pasty, semi-solid, or highly viscous materials that require intensive kneading and dispersion.