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Mflow Extrusion Plastometer

The modular one Download
Test methods
  • MFR
  • MVR
Test volume
  • Average
  • Universal
  • Method A
  • Method B

Mflow - the Modular One

The basic version of the Mflow extrusion plastometers can be used to determine melt mass flow rates (MFR).

It features a modular design, and use of the piston displacement transducer expands the Mflow’s capabilities to include determination of melt volume flow rate (MVR), as well as automatic, field-dependent parameterization. These extrusion plastometers are typically used for quality assurance and incoming goods inspections.

Mflow extrusion plastometer with weight pegging device

The Mflow’s weight pegging device option combines the advantages of pneumatic weight lifting and the convenience of easy and safe changes of test weights. This ensures safe storing of the weights and an ergonomic test sequence.

Advantages & Features

Advantages & Features

Reliable Test Results
Application Description
Intuitive and workflow oriented touch operation
Saving space when testing with multiple instruments
Pneumatic weight lifting unit
Weight pegging device

Reliable Test Results

A precision piston transducer ensures accurate measurement of piston stroke when determining MVR. The contact point is very close to the piston, minimizing possible angle errors from the outset. The accuracy with which the flow rate is determined in Method B depends on the synchronization of the time-travel data pairs and on the accuracy of the time determination. As both measured quantities (time and travel) are available in digital form from the outset, there is no need for analog to digital conversion. This also eliminates synchronization errors. Quartz accurate time measurement also enables measurement of materials with high flow-rates.

Application Description

As the volume of testing increases, so does the need for a greater degree of automation (compared to Cflow). Mflow is capable of modular expansion and can be used to determine melt mass flow rate and melt volume flow rate.

The basic version of the Mflow extrusion plastometer is designed to perform MFR tests in accordance with Method A and can be upgraded for MVR tests as per Method B. Tests to the following standards are possible:

  • Methods A and B, ISO 1133
  • Methods A, B and C, ASTM D1238
  • ASTM D3364
  • JIS K 7210

You can optionally upgrade Mflow, for example by adding the pneumatic weight-lifting unit with or without cleaning function, or the weight selector.

Mflow can be operated in stand-alone mode via a modern touch display or on a PC with ZwickRoell testing software.


Simplified cleaning, with rapid expulsion of residual specimen material

The die plug is located on the underside of the extrusion barrel. Removing the die plug frees the die to move downwards, allowing it to be removed easily. Expelling the die plus residual material after the test is similarly quick and easy. Cleaning is simplified because the barrel is now accessible throughout. The Pneumatic Weight-lifting with Cleaning Function option also enables simple, convenient cleaning of the extrusion barrel at the touch of a button.


Intuitive and workflow oriented touch operation

  • The new standardized operating philosophy allows the operator to move easily between the instrument and the PC.
  • All test-related settings are grouped logically and are separated from higher-level system settings. The operator is guided through the test configuration step by step. The saved test configuration can be easily exported and transferred to other instruments.
  • Integrated user management reduces the number of operator input options to a minimum. Users see only what is important to them so they can focus on the task at hand right from the start.
  • The MVR is shown live in graphic form, in both stand-alone mode and in the ZwickRoell testing software. This allows both melting process and behavior to be followed precisely during measurement.

Saving space when testing with multiple instruments

In labs with multiple instruments, testXpert III makes it possible to configure and control up to six Aflow and/or Mflow extrusion plastometers with one PC. Central operation and the saving of results from a single workplace is rational and affords a quick overview of all tests currently in progress. For a clear overview of operations, we recommend using two monitors.

The benefits of operating an extrusion plastometer with testXpert III are:

  • Automatic bubble detection that prevents measurement errors caused by air inclusions by detecting them in the plastic melt
  • Live display of the melt volume rate that follows the progress of melting and the behavior during measurement and graphically or numerically displays the test piston speed when the test starts in cm³ per 10 min. or in g per 10 min. when the melt density is preselected

Pneumatic weight lifting unit

  • Depending on the plastic being tested, the Mflow extrusion plastometer can be fitted with different test weights.
  • To simplify the process, the weights can be lifted and lowered without physical strength by the pneumatic weight lifting unit.
  • The test weight can automatically be raised by the weight lifting unit when the preheating position has been reached.
  • This minimizes any premature flow of the plastic granulate during the preheating period.
  • If test weights with test loads of, for example, 2.16 kg, 5 kg, 10 kg or 21.6 kg are used with Mflow, we recommend use of the pneumatic weight lifting unit or the weight selector.
Weight pegging_Detail__FO

Weight pegging device

  • The weight pegging device has a pneumatic weight lifting unit and test weights as listed below:
  • If test weights are changed often, we recommend use of the weight pegging device.
  • The device for holding the piston in the preheating position holds the piston in a freely definable position during the preheating phase.

Technical Overview

The basic version of the Mflow extrusion plastometer is designed to perform MFR tests to Method A and can be expanded for MVR tests to Method B. Tests can be performed according to the following standards: Methods A and B to ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Characteristics of the Mflow

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Name Type Size Download
  • Product brochure: Extrusion plastometers PDF 3 MB
  • Product information: Mflow extrusion plastometer PDF 127 KB

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