Co-rotating twin-screw extruder PROMIX-26

pharmaceutical

Overview
The PROMIX-26 is a co-rotating twin-screw extruder engineered for pilot-scale continuous processing: feeding, melting, mixing, venting, pressurizing and discharge for compounding, granulation, pharmaceutical and food extrusion, and specialty materials production.

Core applications

• Plastic modification and compounding
• PVC granulation and cable compounds (PVC / XLPE)
• Bio-plastic and bio-based compounds
• Rubber and plastic recycling granulation
• Battery separator and electrode substrate materials
• Food extrusion / Hot Melt Extrusion (HME) for pharmaceuticals
• Thermoplastic elastomers (TPE/TPR)
• Color masterbatch and additives concentrates

Key components

• High-efficiency gearbox
• Torque limiter
• Modular barrel
• Side feeder
• Integrated heating and cooling system
• Pressure & temperature sensors
• Operator HMI

Advantages / Technology Highlights
1. Maxxtorque
High-power drive and transmission gearbox with dual power distribution for ultra-high torque transmission and resistance to axial reverse pressure, designed for safe long-term operation.

Gearbox Advantages

• Thick-walled housing for rigidity
• High transmission efficiency
• Noise-optimized gears
• Continuous lubrication to reduce churning losses
• Extended service life with high-performance oils
• Optional torque measurement on drive shafts

2. Maxxshaft
DIN 5480 involute splines for enhanced torque transmission and stability.

Advantages

• High torque capacity
• Improved load capacity and longer service life
• Stable operation under high-output conditions
• Facilitates maintenance

3. Maxxvolume
Optimized outer-to-inner diameter ratio (1.66) increases free volume and improves throughput for volume-restricted processes (dry blends, pigments, fillers), with possible throughput gains up to 30%.

4. Maxxcooling
Increased cooling inlets/outlets per barrel and advanced valve control for superior thermal management; compact carrier system with integrated cooling piping and high-quality valves.

Why choose coax valves?

• Zero-differential-pressure startup via pressure-balanced design
• Low flow resistance and high flow rate with straight-through channel
• Compatible with high-viscosity, particle-laden and high-pressure media
• Long service life suitable for frequent start/stop cycles

5. Modular screw system (the heart of the extruder)
Screw materials and element combinations are customizable to match formulations and performance targets.

Screw element types

• Conveying and mixing elements
• Kneading blocks
• Intermeshing conveying elements
• Non-self-wiping conveying elements

6. Modular barrel system
Barrel options include feed ports, degassing and venting inserts; heating cartridges enable fast warm-up, efficient melting and simplified spare-part management.

7. Raw material solution
Customized barrel and screw surface materials to enhance wear and corrosion resistance according to process requirements.

8. Surface-treatment
Mirror-quality finishes with optional Balzers · MOLDENA-PVD coatings for improved surface performance.

Technical specifications

• Model: PROMIX-26
• Diameter: 25.7 mm
• Barrel Length: 1000 mm
• L/D: 40:1
• Motor Power: 37 kW
• Max. Screw Speed: 900 rpm
• Torque per shaft: 140 N·m
• Specific Torque: 15
• Dimensions (L×W×H): 2600×740×1680 mm
• Weight: 1500 kg
• Output: 50–200 kg/h

Application examples

• PEEK processing
• Pharmaceutical extrusion and GMP-grade solid dispersions
• Medical-grade plastics
• Battery separator, cathode and anode materials
• PVC and XLPE cable compounds
• Thermosetting and thermoplastic compounds
• Bio-plastic compounds and plant-based food extrusion

Characteristics / specifications

• Model: PROMIX-26
• Diameter: 25.7 mm
• Barrel Length: 1000 mm
• Motor: 37 kW, max 900 rpm
• Output range: 50–200 kg/h