Mflow extrusion plastometer

The basic version of the Mflow extrusion plastometers can be used to determine the melt mass flow rate (MFR). The plastometer features modular design; using the piston transducer expands Mflow's capabilities to include determination of melt volume flow rate (MVR), plus automatic adaptive parameter configuration. Typical uses are in quality assurance and goods inwards checks.

Key advantages and features

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.

Description of application

The Mflow is a modular, expandable instrument with which you can determine the melt mass and melt volume flow rate. Affordable to setup and gradually expand at any time.

You can expand the Mflow with, for example, the pneumatic weight lifting unit or the weight pegging unit. The extrusion plastometers are equipped with heating elements that are specially adapted to the thermal conditions of extrusion barrels and instrument housings. This achieves a very good distribution of temperature over space and time.

Operation of the Mflow via a PC offers all the advantages of the Zwick Roell testing software: Up to six instruments can be operated with one PC.

  • 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 to the following standards are possible:
  • Methods A and B to ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Cleaning

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.

Operating philosophy

The new standardized operating philosophy allows the operator to move easily between instrument and PC and always feel at home.

All test-related settings are grouped logically and are separated from higher-level system settings. The operator is guided through test configuration step by step. The saved test configuration can easily be exported and transferred to other instruments.

Integrated user management allows the operator's input options to be reduced to a minimum. Users see only what is important to them, allowing them to focus on the task at hand right from the start.

The MVR is shown "live" in graphic form in 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 saving of results at a single workplace increases efficiency 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

Mflow extrusion plastometer with weight selector

The Mflow weight-selector option combines the advantages of pneumatic weight-lifting with the convenience of simple, safe and reliable changing of test weights, ensuring secure weight-storage and an operator-friendly test sequence.

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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).

Additional information on the weight selector

Pneumatic weight lifting unit

  • The Mflow extrusion plastometer can be fitted with test weights according to the plastic in use.
  • To ease the load on the operator, the weights can be raised and lowered by a pneumatic weight-lifting unit with no physical effort required.
  • The test weight can automatically be raised by the weight-lifting unit when the pre-heating 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 selector

  • The weight selector contains the pneumatic weight-lifting unit plus the test weights listed below.
  • If test weights are changed frequently we recommend use of the weight selector.
  • The piston-holding device retains 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 in accordance with Method A and can be expanded for MVR tests as per Method B. Tests to the following standards are possible: Methods A and B as per ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Technical data for Mflow extrusion plastometer

Basic instruments

Type

Mflow extrusion plastometer (230 V)

Mflow extrusion plastometer (110 V)

Item No.

1043951

1043953

Test load

0.325 to 21.6

0.325 to 21.6

kg

Compressed air, oiled, dry (option for pneumatic weight-lifting unit)

6 to 10

6 to 10

bar

Dimensions

Height

510

510

mm

Width

360

360

mm

Depth

395

395

mm

Approx. weight

43

43

kg

Test temperature

+50 to +450

+50 to +450

°C

Display

capacitive touch display

capacitive touch display

Temperature display resolution

<0.1

<0.1

K

Number of storable parameter sets

>100

35

Interfaces

  • Ethernet port for connecting a PC
  • 2 x USB port for connecting a printer or USB stick
  • RS-232 port for raw data export, data output: serial number, specimen number, number of extrudates, thickness (user-specified), thickness at test temperature, total weight of extrudates, MFR average value, MVR average value, MFR and MVR individual values
  • RS232 port for connecting an analytical balance (from the ZwickRoell 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]

<0.3[1]

K

Time measurement

Error limit (Method A)

± 0.02 (with automatic extrudate cutter)

± 0.02 (with automatic extrudate cutter)

s

Error limit (Method B)

± 0.01

± 0.01

s

Travel measurement

Error limit (Method B)

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

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

Resolution

<0.005

<0.005

mm

Multi-instrument operation on one PC:

available main memory, min.

1.54

GB

clock rate

3

GHz

connected Mflow plastometers per PC

6

Multi-instrument operation on a single PC.

available main memory, min.

1.54

GB

clock rate

3

GHz

connected Mflow plastometers per PC

6

Included in delivery:

  • Ethernet cable
  • test weights for load levels 325 g and 2.16 kg
  • hopper
  • cleaning accessories (cleaning piston, cleaning brush, cleaning pads (500x)) for barrel
  • test granulate and filling chute for granulate

Power input specifications

Power supply

220 to 240 V, 1L/PE/N

100 to 127 V, 1L/PE/N

Power consumption (full load), approx.

0.6

0.6

kVA

Power frequency

50/60

50/60

Hz

  1. for distance and time, complies with ISO 1133-2

Suitable accessories

Test weights

Test weights

The test weights are required for both the pneumatic weight lifting and for the weight lifting with cleaning function.

Test load
[kg]

Required for this:

Item no.

5

-

001380

5/10

-

001381

5/10/15/21.6

-

001443

1

-

001385

1.05

-

001386

1.2

-

001387

3.8

-

001459

12.5

Test weights with test loads 5/10 kg (item no. 001381)

001389

(ASTM D 3364) 20

Test weights with test load 5/10/15/21.6 kg (item no. 001443)

008077

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
[mm]

Drill hole

Properties

Item No.

Plastic, fluorine free

9.55

Finely honed

Wear resistant

087025

Plastic, containing fluorine

9.55

Finely honed

Resistant to acid

087028

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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