Extruding Discharge Sigma Blade Mixer For Silicone

During mixing the extrusion screw rotates in reverse, continuously feeding material back into the sigma blades to improve kneading efficiency and prevent settling. For discharge, the screw reverses direction and pushes the finished mix out through a die, forming it into strips, pellets, sheets, or other shapes for easier downstream handling.

The mixer is offered in Stainless Steel 316, Stainless Steel 304, or Mild Steel. Stainless-steel versions can be finished in matt or mirror polish; mild-steel units receive one coat of red oxide primer plus two coats of epoxy paint.

Models range from ASM-50 (approx. 50 L working / 80 L gross) to ASM-3000 (approx. 3000 L working / 3800 L gross). Motor power is available in general and heavy-duty ratings, and voltage can be customized to local requirements.

Two counter-rotating Z-shaped (sigma) blades mounted in a U- or W-shaped trough rotate toward each other at different speeds. This produces powerful shearing, folding, stretching, dividing, and recombining action that delivers thorough homogenization of thick, sticky compounds.

Yes. A jacket for heating or cooling can be fitted, complete with mineral-wool insulation and cladding. An optional blade-cooling arrangement provides additional temperature management.

Tangential blades meet at the edges, typically rotate at different speeds (often a 3:2 ratio), and are preferred for higher-viscosity materials such as silicone rubber and adhesives. Overlapping blades rotate at the same speed, suit lower-viscosity materials, offer faster material interchange, and produce less intensive kneading and shearing.

Options include a liquid spray system, vacuum system, blade-cooling arrangement, screw system (integral to the extruding discharge design), and automatic valve discharge system.

Sticky, high-viscosity compounds are difficult to empty from conventional mixers. The integrated extrusion screw enables efficient discharge while simultaneously forming the product into usable shapes (strips, pellets, sheets), improving productivity and simplifying downstream processing.

Key features include tangential Z-blades for uniform mixing, choice of SS 316 / SS 304 / mild steel construction with appropriate finishes, optional heating/cooling jacket with insulation, PTFE shaft sealing, minimal blade-to-trough clearance to reduce sticking, and the integrated extruding screw system for enhanced mixing and formed discharge.