PerMix Sigma Mixer

Twin Shaft Kneading

• Two counter-rotating sigma blades knead, fold, and shear the material.
• Provides intensive mixing for high-viscosity pastes and slurries.

Sealing & Containment

• All seals are isolated from the product zone.
• Options: mechanical seals, stuffing boxes with purge, or gas-sealed designs for ATEX zones.

Thermal Control & Vacuum Options

• Jacketed troughs allow heating/cooling via steam, water, or thermal oil.
• Vacuum options enable deaeration or drying during mixing.

Feeding & Discharge

• Feed via top ports, hoppers, or vacuum loading.
• Discharge via tilting troughs, bottom valves, or screw/ram extruders for viscous materials.

1. Loading — viscous material charged into chamber
2. Kneading Action — sigma blades fold, shear, and compress material repeatedly
3. Thermal Regulation — jacketed surfaces maintain target temperature
4. Vacuum/Inerting — volatile removal or inert atmosphere if required
5. Discharge — through valves, tilt, or screw/ram discharge systems

Side Screw Kneader-Extruder

• Provides positive discharge of highly viscous, non-flowing products
• Single or twin screw, with zoned heating/cooling
• Torque & head-pressure monitoring for precise control
• Vacuum venting and inert gas purging possible
• Die plate options for strand, sheet, or pellet forms

Hydraulic Discharge Press (Ram)

• Batch discharge option for extremely stiff doughs or pastes
• Hydraulic ram forces product out through sanitary valves or dies
• Ideal for adhesives, gum bases, or high-solids pharmaceutical pastes

When to Choose

• Extruder: continuous discharge, downstream forming, mass-flow control
• Hydraulic press: intermittent batches, very stiff compounds

• Heavy-duty frame & shafts for extreme torque
• Custom sigma blade geometries (serrated, scraper, kneading profiles)
• Heating/cooling jackets with multi-zone control
• Vacuum/inert systems for moisture & oxygen control
• Advanced instrumentation (torque, temp, vacuum sensors)
• PLC/HMI with recipe management
• ATEX/DSEAR compliant builds for hazardous areas
• Material options: 304/316L stainless, Hastelloy, Titanium, Duplex
• Easy cleaning: CIP, removable covers, inspection ports

• Adhesives & Sealants: resins, mastics, fillers
• Food: doughs, confectionery pastes, thick sauces
• Pharmaceuticals: APIs, wet granulations, viscous pastes
• Cosmetics: creams, gels, pastes
• Specialty Chemicals: composites, catalysts, ceramic pastes

Example: A UK sealant producer uses a sigma kneader-extruder with vacuum venting to blend filled polymer pastes and extrude them directly into cartridges under ATEX compliance.

• Handles materials standard mixers cannot process
• Vacuum + thermal control in one vessel
• Optional extrusion for continuous, sealed discharge
• Lower contamination risk: seals kept out of product zone
• Local UK engineering support, validation, and servicing
• Regulatory confidence: UKCA, CE, GMP, ATEX/DSEAR

To define the right build, consider:

• Batch size & throughput goals
• Material rheology and viscosity range
• Heating/cooling requirements
• Moisture or solvent removal needs
• Material compatibility (abrasive/corrosive)
• Cleaning & GMP validation demands
• Discharge type: tilt, valve, screw, or hydraulic press

When your process demands high-torque kneading of viscous pastes, doughs, or slurries, the PerMix Sigma Mixer UK is the proven solution.

Contact PerMix UK with your process details — viscosity, solids content, batch goals, temperature needs — and we’ll configure the right mixer, with optional kneader-extruder or discharge press, to meet your UK/EU standards.