Hot Melts Sigma Mixer

The mixer is available in Stainless Steel 316, Stainless Steel 304, and Mild Steel. Stainless steel versions can be finished to matt or mirror polish according to customer requirements, while mild steel receives one coat of red oxide and two coats of epoxy paint.

Tangential “Z”-type (sigma) blades rotate toward each other at different speeds (typically a 3:2 ratio), transferring material from one end of the trough to the other. This creates a combination of bulk movement, stretching, folding, dividing, recombining, shearing, and tearing against the blades and side walls, delivering uniform mixing and size reduction ideal for high-viscosity adhesives and thermoplastics.

Tangential blades meet at the edges, rotate at different speeds, and provide stronger kneading and shearing—preferred for higher-viscosity materials such as hot melt adhesives, rubber compounds, and similar products. Overlapping blades rotate at the same speed for faster material interchange and are better suited to lower-viscosity materials with less intense kneading.

Models range from ASM-50 (approximately 50 L working / 80 L gross capacity, 5–7.5 HP) to ASM-3000 (approximately 3000 L working / 3800 L gross capacity, 100–120 HP). Both general and heavy-duty motor options are available, and power voltage can be adjusted to meet local requirements.

Discharge can be performed by hand-wheel operated (manual) or hydraulic operated (automatic) tilting of the container, through bottom valves, or via an extrusion screw located beside the container.

Yes. A jacket for heating or cooling applications is available, complete with mineral wool insulation and cladding. Optional features also include blades cooling arrangements to maintain precise process temperatures for thermoplastic materials.

A minimum gap between the trough inner shell and the blades reduces the possibility of product sticking. PTFE shaft sealing is provided for compatibility, and the U- or W-shaped trough with counter-rotating sigma blades (close clearances of ~2 mm) minimizes dead zones while delivering high shear for breaking agglomerates and achieving excellent homogeneity.

Optional features include a liquid spray system, vacuum system (to reduce air entrapment), blades cooling arrangement, screw system, and automatic valve discharge system. These enhance process control for adhesive and sealant production.

It is used across the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries, particularly where high-viscosity thermoplastic adhesives, sealants, and related compounds need reliable compounding with superior homogeneity and faster batch times.