Biscuit Dough Sigma Mixer

The mixer features two powerful Z-shaped blades that rotate at different speeds (typically in a 3:2 ratio) in a U-shaped trough. This counter-rotating tangential action creates intensive shearing, folding, stretching, and recombining motions. The blades scrape the sides and bottom to eliminate dead zones, thoroughly blending ingredients like flour, fats, sugars, and water for optimal hydration and dough development.

Models range from lab/pilot scale (ASM-50: 50L working capacity) to large production sizes (up to ASM-3000: 3000L working / 3800L gross capacity). Motor power varies from 5 HP (general duty) to 120 HP (heavy duty), with customizable power voltage to suit local requirements. Fill volumes are typically 40-65% of trough capacity.

Contact parts are available in Stainless Steel 304 or 316 (with matt or mirror polish) for superior hygiene and corrosion resistance, or Mild Steel with epoxy paint. PTFE shaft seals ensure food-grade compatibility, while minimal gaps between blades and trough prevent product sticking. Hard chrome plating on blades adds wear resistance.

Discharge can be achieved via manual hand-wheel tilting, hydraulic automatic tilting (up to 110°), bottom valves, or an extrusion screw. These options facilitate easy unloading of heavy, sticky doughs, minimize waste, and support efficient cleaning between batches.

Yes. An optional jacket for heating or cooling (with mineral wool insulation and cladding) is available, along with cored blades in some configurations. This helps maintain ideal dough temperatures, which is critical for proper fat incorporation, hydration, and preventing issues in low-moisture (hard) dough formulations.

It delivers consistent, repeatable results with minimal labor and waste. It handles very low hydration levels (as low as 50% for hard doughs), offers excellent versatility, hygienic open-frame designs for easy cleaning, and reliable high-torque direct-drive systems built for intensive use.

Popular options include vacuum systems for de-aeration, liquid spray systems for additives, variable frequency drives (VFD) for speed control, and safety interlocks. These support precise control over mixing time, intensity, and dough quality.

While optimized for biscuit, cookie, and cracker doughs, the Sigma Mixer is versatile and used across Pharmaceutical, Nutraceutical, Herbal, Ayurvedic, Biotech, Cosmetic, and Chemical industries for high-viscosity pastes, creams, and compounds requiring thorough homogenization.

The mixer features food-grade stainless steel construction, smooth polished surfaces, minimal blade-to-trough gaps (reducing sticking), PTFE seals, and easy-tilt bowls. This supports GMP compliance, quick cleaning, and low maintenance, making it ideal for food production environments.