Twin screw extruder PROMIX series

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Product Overview
The core applications of the PROMIX twin-screw extruder include:

• Plastic modification
• PVC granulation
• Bio-plastic materials
• Rubber and plastic recycling granulation
• New energy — lithium battery separator & electrode substrate materials
• Cable compounds (XLPE/PVC)
• Food / Hot Melt Extrusion (HME) pharmaceuticals, sustained-release microspheres, GMP-grade solid dispersions
• Chemicals

Main Components

• Gearbox
• Torque limiter
• Barrel
• Side feeder
• Cooling system
• Heating system
• Pressure & temperature sensors
• HMI

Advantages
1. Maxxtorque — increased output and improved operational safety
The gearbox is designed to transmit very high torque and resist reverse axial loads. PROMIX twin‑screw extruders use a high‑power drive and a dual power distribution gearbox engineered for heavy-duty operation.

Gearbox advantages:

• Thick‑walled housing
• High transmission efficiency
• Noise reduction via precision gear finishing
• Continuous lubrication to reduce churning losses
• Extended service life using high‑performance lubricants
• For certain sizes: torque measurement on drive shafts

2. Maxxshaft — DIN 5480 involute splines
Benefits include:

• Capacity to withstand high torque
• Higher load capacity and longer service life
• Stable operation under high output and heavy load
• Easier maintenance

3. Maxxvolume — increased throughput via enlarged volume
With an outer/inner diameter ratio of 1.66 the design balances large free volume and effective energy input. Lower cut screw flights and larger external diameters can increase throughput up to 30%.

4. Maxxcooling — enhanced cooling for a wider process window
The design doubles inlet/outlet ports per barrel and uses advanced cooling valve control to increase cooling flow. The system integrates a cooling pipe carrier and compactly assembled coax valves in the frame.

Why coax valves?

• Zero‑differential‑pressure startup: pressure‑balanced reliable open/close
• Low flow resistance and high throughput: straight‑through flow path
• Multi‑medium compatibility: suitable for viscous oils, particle‑laden fluids and high‑pressure gases
• Long service life and high reliability: even stress distribution reduces seal wear

5. Modular screw system — core processing element
Screw material and configuration are customizable. Elements include conveying & mixing, kneading, intermeshing conveying, and non‑self‑wiping conveying elements to match formulations.

6. Modular barrel system
Barrels can be supplied with ports or inserts for feeding, degassing and venting. Heating uses cartridge heaters for fast heat‑up, quicker melting/wetting and improved spare‑part management compared with heating bands.

7. Raw material solutions
Customized barrel materials and material‑specific inserts are available to meet processing requirements.

8. Surface treatment
Mirror finish options and PVD coatings (e.g., Balzers / MOLDENA) are offered.

Technical specifications

• Series name: PROMIX series (PROMIX-11, PROMIX-16, PROMIX-26S, PROMIX-32S, PROMIX-40S, PROMIX-50S)
• Diameter range: 11 mm — 50.3 mm depending on model
• Barrel lengths: 460 mm to 1980 mm depending on model
• L/D ratio: 40:1 for listed models
• Motor power: 2 kW — 130 kW depending on model
• Max screw speed: up to 1000 rpm (smaller models), 900 rpm (larger models)
• Torque per shaft: 6 N·m — 980 N·m depending on model
• Specific torque: typically 11–15 (model dependent)
• Output capacity: 0.2 kg/h — 350 kg/h depending on model
• Modular screw and barrel systems for material‑specific customization
• High‑performance gearbox and DIN 5480 spline shafts
• Enhanced cooling with doubled inlets/outlets and coax valves
• Surface treatment options: mirror finish, PVD coatings

Application
The extruder suits processing of:

• PEEK
• Pharmaceutical extrusion
• Medical plastics
• Battery separator & electrode materials
• PVC compounds
• TPE/TPR
• Bio‑plastic compounds (starch, bamboo powder, straw filling)
• Thermosetting materials (PF/EP/PU/UPR/UF)
• PVC cable compounds
• Color masterbatch
• Food — plant‑based meat (HMMA)
• XLPE cable compounds

Technical details

• Examples (model / diameter / barrel length / motor / max screw speed / torque per shaft / output): PROMIX-11 — 11 mm — 460 mm — 2 kW — 1000 rpm — 6 N·m — 0.2–2.5 kg/h; PROMIX-16 — 16 mm — 670 mm — 3.5 kW — 1000 rpm — 9.5 N·m — 0.5–20 kg/h; PROMIX-26S — 25.7 mm — 1000 mm — 37 kW — 900 rpm — 140 N·m — 50–200 kg/h; PROMIX-32S — 31.8 mm — 1260 mm — 83 kW — 900 rpm — 315 N·m — 60–250 kg/h; PROMIX-40S — 40.3 mm — 1620 mm — 110 kW — 900 rpm — 600 N·m — 80–300 kg/h; PROMIX-50S — 50.3 mm — 1980 mm — 130 kW — 900 rpm — 980 N·m — 100–350 kg/h