Twin screw extruder
PVC compounding
Expertise in extrusion technology
We have been developing high-quality extruder systems for processing plastics and rubber for decades.
With our modular machine construction, many years of expertise and customized solutions, we offer individual system concepts - from laboratory systems to large-scale industrial production lines.
Twin screw extruder - counter-rotation
Our compact, counter-rotating extruders are specially designed for compounding and pelletizing soft PVC and rigid PVC.
ERMAFA supplies complete PVC compounding lines - depending on customer requirements - with the following line components:
- Raw material emptying
- Ensiling
- Promotion
- Weighing
- Mixing
- Granulation
- Packaging
Machine and process engineering features
- Counter-rotating screws in compact design for soft & hard PVC
- Co-rotating screws for special applications
- Variable wear protection against abrasion & corrosion (barrels and screws)
- High-performance vacuum degassing
- Vertical feeding with tamping screw (cold or hot feeding)
- PLC control with visualization
Granulation systems
- Adaptable systems with variable number of nozzles and nozzle diameters
- Centric knock-off for soft PVC & hard PVC
- Eccentric cut-off for highly filled rigid PVC compounds
Granulate cooling
- Effective, space-saving two-stage cooling
- Throughput up to 2,500 kg/h
- With integrated agitator shaft in the upper cooling stage
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Twin screw extruder - Synchronization
ERMAFA also offers co-rotating twin-screw extruders for more complex tasks. These are supplied as complete, process-optimized systems consisting of:
- Ensiling
- Promotion
- Gravimetric dosing
- Compounding
- Granulation
- Packaging
Machine and process engineering features
- Throughput rates from 10 - 10,000 kg/h
- Variable wear protection for barrels and screws (abrasion & corrosion)
- Flexible dosing options: volumetric, gravimetric or with tamping unit
- PLC with process visualization
Cylinder
- Lengths up to 50 x D
- Modular segments: 4 x D, 5 x D or 6 x D
- Special segments for feeding, degassing & dosing
- Cooling with either air or water
- Multiple degassing systems into the open air or under vacuum
Snails
- Screw speed up to 1,200 rpm
- Special segments for conveying, degassing, mixing & dispersing
Granulation process
- Strand pelletizing
- Water ring pelletizing
- Underwater pelletizing
- Hot die face pelletizing
Sizes
| Type | Screw diameter | Screw speed | Torque per screw |
|---|---|---|---|
| E2.27 | 27,1 | 1200 | 160 |
| E2.40 | 41,3 | 1200 | 580 |
| E2.50 | 51,3 | 1200 | 1100 |
| E2.65 | 66,2 | 1200 | 2400 |
| E2.80 | 80,5 | 1000 | 4200 |
| E2.95 | 94,6 | 800 | 6900 |
| E2.134 | 134 | 500 | 153000 |
Further variants on request.
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