The fully automatic Aflow

A defining feature of Aflow is its high level of automation - easy cleaning and defined pre-compacting at the touch of a button, stepless test-load settings - Aflow adapts to your testing requirements. Aflow was developed specifically for laboratories with high testing volumes; this is reflected in its robust design and convenient operation. It supports all established worldwide standards, including ISO 1133 and ASTM D1238. Aflow can be used to determine melt mass flow rate (MFR) and melt volume flow rate (MVR) to Methods A, B, C and D.

Key advantages and features

Advantages and features

  • Fast cleaning and defined pre-compaction at the press of a button.
  • The test loads can be adjusted steplessly from 0.325 kg to 50 kg.
  • With automated, field-dependent parameterization, the Aflow selects the test parameters to determine the optimized test results. The result are fewer measurement errors.
  • The remaining material can be purged from the extrusion barrel with a force of up to 80 kg.
  • Time-saving, multi-stage tests according to Method D: Several tests with different weight stages can be carried out with a single barrel filling.
  • The precise temperature distribution in the extrusion barrel corresponds to ISO 1133 Part 1 and Part 2.
  • The pivotable testing tower locks automatically in the cleaning or testing position.
  • Ergonomic operation: The pivotable and detachable specimen hopper is ideally suited for rapid filling of the extrusion barrel and for quick and easy purge of the remaining granulate.
  • In stand-alone mode, results can be quickly and easily read without a PC.

Range of application

The Aflow is noted for being highly automated: Whether simple cleaning and defined pre-compaction at the press of a button, or infinitely settable test loads, the Aflow adapts to your test tasks. The extrusion plastometer supports all globally common standards and procedures, including ISO 1133, ASTM D1238 to Methods A, B, C and D.

The pneumatic pre-compaction feature allows the polymer to be defined and evenly pre-compacted at the press of a button—saving time and effort. Pre-compaction offers a great degree of operator independence, even if the operator performing the test changes often.

Furthermore, Zwick Roell testing software determines the test results in the automated, field-dependent parameterization, ensuring that the Aflow automatically selects the correct test parameters.

To further accelerate the test procedure after the test, you have the possibility to eject the remaining material from the extrusion barrel with a force of up to 80 kg and then to clean the extrusion barrel with a pneumatic cleaning device at the press of a button.

Space-saving, multi-instrument operation lets you connect up to six Aflow or Mflow extrusion plastometers to a PC. Of course, you can also use the Aflow in standalone mode without a PC.

  • The basic version of the Aflow extrusion plastometer is designed to perform MFR and MVR tests to Methods A, B, C and D. They are performed using an automatic extrudate cutter and scale. Tests can be performed to the following standards:
  • ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.


Simplified cleaning and quick specimen remains purge

There is a die plug on the underside of the extrusion barrel. Once removed, the die falls downward. This makes it possible to easily remove the die.

This also makes it possible to quickly purge all specimen remains after the test is complete. Cleaning is simplified because the barrel is always accessible.

Aflow extrusion plastometer at a glance


Mflow extrusion plastometer in all models

The modular Mflow extrusion plastometer is used to determine the melt flow rate (MFR) and volume flow rate (MVR).

Technical overview

The basic version of the Aflow extrusion plastometer is designed to perform MFR and MVR tests in accordance with Methods A, B, C and D. This can be done using an automatic extrudate cutter and balance. Tests can be performed in accordance with the following standards: ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Technical data for Aflow extrusion plastometer




Aflow extrusion plastometer

Item no.


Test load

0.325 to 50 (step by step or stepless)


Compressed air, oiled, dry

5 ... 10












Approx. weight



Test temperature

+50 to +450



LCD graphic display, backlit

Resolution of the temperature display

< 0.001



Pressure point soft touch keypad

Number of savable parameter sets



  • USB port to connect to a PC
  • RS-232 port for raw data export, data output: Serial number, specimen number, number of extrudates, density (user specifications) density at test temperature, overall weight of the extrudates, MFR average value, MVR average value, MFR and MVR individual values
  • RS-232 port for connecting the analytical scale (from the Zwick product range)

Temperature accuracy in the range of 0 to 75 mm above the die in the temperature range of 50 °C to 450 °C

< 0.3[1]


Time measurement:

Error limit (Method A)

±0.02 (with automated extrudate cutter)


Error limit (Method B)



Travel measurement:


< 0.0005


Error limit (Method B)

±0.02 mm (ISO 1133) / ±0.4% of 6.25 mm (ASTM D1238)

Multi-instrument operation on one PC

Available main memory, min.



Clock frequency



Connectible Aflow extrusion plastometer per PC


Included in the scope of delivery:

  • USB cable
  • Cleaning accessories (cleaning rod, cleaning brush, cleaning pads (500 pieces), die cleaning brush Ø 2.095 mm) for the extrusion barrel and die
  • Test granulate and filling chute for granulate

Power input specifications

Power supply

220 to 240 V, 1L/PE/N

Power consumption (full load), approx.



Power frequency



  1. Spatial and temporal, to ISO 1133-2

Suitable accessories


Piston (1 required)

At least one piston must be selected. It should suit the materials to be tested. If you are testing to ISO 1133-1997, a sharp-edged piston is required.

Test material



Item no.

Plastic, fluorine free

ISO 1133

Wear resistant


Plastic, containing fluorine

ISO 1133

Resistant to acid


Plastic, fluorine free

ISO 1133-1997

sharp-edged, Plastic, containing fluorine


Plastic, fluorine free

ASTM D1238



Extrusion barrels

Extrusion barrel (1 required)

An extrusion barrel must be chosen to suit the materials to be tested. Cleaning pads and a cleaning rod are supplied to clean the extrusion barrel.

Test material

Inner diameter

Drill hole


Item no.

Plastic, fluorine free


Finely honed

Wear resistant


Plastic, containing fluorine


Finely honed

Resistant to acid

Extrudate cutter

Extrudate cutter and die plug

The manual extrudate cutter is recommended for cutting intervals greater than one minute. For short cutting intervals use of the automatic extrudate cutter is recommended in order to obtain precisely timed cuts. The die plug prevents premature outflow of the material when plastics with high flow-rates (>  10 cm3/10 min at load 0.375 kg) are being tested. When the die plug is used an extrudate cutter is required in order to eject the die plug automatically when the test begins. 
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