Extrusion plastometers
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Extrusion Plastometers Aflow, Mflow and Cflow Intelligent Test

1 Zwick Roell extrusion plastometers – permanent enhancement for over 40 years For more than 40 years, Zwick has developed innovative extrusion plastometers tailored to customer requirements. The new Xflow series ranges from the manually operated Cflow for checking incoming goods, to the Mflow with weight selector and travel measurement system, to the convenient Aflow with cleaning and precompacting device and innovative load lifting for test loads of up to 50 kg. This is where the Aflow, with its defined precompacting of the polymer, automatic parameter control, fast ejection of remaining...

3 Features of the extrusion plastometers 3.1 Extrusion plastometer Cflow The Cflow is a compact instrument that allows rapid inspection of the flow behavior of plastics according to Method A. It is specifically designed for the processors of plastics that are less subject to extrusion tests and which do not require a connection to a PC. 3.2 Extrusion plastometer Mflow The Mflow is a modular, expandable device with which you can determine the melt mass and melt volume flow rate. Affordable to setup and gradually expand at any time. Fig. 1: The Cflow extrusion plastometer - precise MFR testing Fig....

Automatic parameter control can, depending on the material currently being tested, set the test parameters so that measurement errors are automatically minimized. Weight selector The pneumatic weight selector lets you change test weights easily and safely. The instrument already contains all common test weights: 0.325 kg; 1.2 kg; 2.16 kg; 3.8 kg; 5 kg; 8.7 kg; 10 kg; 12.5 kg; 20 kg and 21.6 kg. The optional 1.05 kg or 1 kg test weights can be used instead of the 1.2 kg weight. You also have the possibility to hold the piston at any position you choose over the orifice in the pre-heating...

3.3 Extrusion plastometer Aflow The Aflow is noted for having a high degree of automation: whether simple cleaning and defined pre-compacting 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 D 1238 according to Methods A, B, C and D. The pneumatic precompacting feature allows the polymer to be defined and evenly precompacted at the press of a button – saving time and effort. Furthermore, testXpert® II determines the test results in the...

Aflow – The test sequence The Aflow was developed for high specimen numbers and stands for a prompt test sequence as well as userindependent, quick and easy testing. At the beginning of the test, the polymer is added to the self-leveling specimen hopper. Next, the specimen is precompacted evenly and with definition – all at the press of a button. The automatic parameter control enables test results to be determined in such a way that produces the smallest possible measurement errors from the time and displacement measurement. Test parameters are optimized and measurement errors minimized....

4 Stand Alone operation and testXpert® II The instrument electronics offer convenient operation features in Stand Alone Mode: • Fast switching between languages • Input of the standard used and automatic parameter control based on that standard • Manual input of the test parameters • Input of the test method used (A, B) • Automatic saving of the parameter sets used when the device is switched off • Result output: individual values and statistical characteristic values (average, standard deviation, coefficient of variation) Management of multiple Aflow or Mflow extrusion plastometers via a PC...

Automatic parameter control (APC) The automatic parameter control can be used to determine both the MVR (Method B) and the MFR (Method A). The piston speed is determined by the MFR/MVR of the polymer. The instrument automatically selects the optimal test parameters from the parameter table and uses them to perform the test. The prerequisite for using automatic parameter control is the use of a travel measurement system. During operation without a PC, several standards-based parameter tables are available to you. When using testXpert® II, you can additionally create your own parameter...

5 Technical data of the extrusion plastometers The basic version of the Aflow is designed for MFR and MVR tests according to Method A, B, C and D. They can be achieved with an automatic extrudate cutter and scale. Tests to the following standards are possible: ISO 1133, ASTM D 1238, ASTM D 3364, JIS K 7210. The basic version of the Mflow is designed for MFR tests according to Method A and can be expanded for MVR tests according to Method B. Tests to the following standards are possible: Methods A and B according to ISO 1133, ASTM D 1238, ASTM D 3364, JIS K 7210. The Cflow is designed for...

6 Accessories for the extrusion plastometers The extensive accessories for all extrusion plastometers of the Xflow series include extrusion barrels, test pistons and orifice pairs. An extrusion barrel must be chosen to suit the materials to be tested. Cleaning pads and a cleaning piston are supplied to clean the extrusion barrel. You can choose between extrusion barrels for specimens with and without fluoride. The automatic extrudate cutter and the spacer make it easier for you to work with the Mflow and Cflow. The automatic extrudate cutter is recommended for short cutting intervals in order to...

The weight selector and the travel transducer make it easier for you to work with the Aflow extrusion plastometer. A pneumatic device is available for fast and fatigue-proof cleaning and precompacting of the Aflow. To simplify your work, the weights can be lifted and lowered effortlessly by the pneumatic weight lifting unit. The test weight can be automatically lifted by the weight lifting unit after reaching the pre-heating position. This minimizes any premature flow of the plastic granulate in the pre-heating period. The pneumatic cleaning device of the Aflow can be used to clean and...