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
TypeScrew diameterScrew speedTorque per screw
E2.2727,11200160
E2.4041,31200580
E2.5051,312001100
E2.6566,212002400
E2.8080,510004200
E2.9594,68006900
E2.134134500153000

Further variants on request.

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