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Single screw extruders: Simulate production realistically on a laboratory scale

Intended use

Simulate production realistically on a laboratory scale


Measuring Extruders and Extrusiograph

The Brabender modular system allows a complete instrumentation of the extruders for the control and development of raw material. Different screws, die heads, and downstream equipment fulfill all kinds of extrusion tasks.

  • Modular systen
  • Practice-oriented

 

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Single screw measuring extruders and Extrusiograph

Brabender single screw measuring extruders and Extrusiograph are interchangeable measuring heads which, in connection with a Plasti-Corder Lab-Station or Plastograph®, serve for testing the extrudability of polymers and for studying problems occurring in research and development as well as in practical application. The Brabender® modular system allows the complete instrumentation of the extruders for raw material checks and development. Manifold screws, die heads, and downstream equipment fulfill all kinds of extrusion tasks.

The sample material is plastified under practice-oriented conditions and extruded through the die head. All measuring values such as torque, melt temperature, melt pressure (if requested, screw backforce, too) are recorded continuously and represented in the form of tables and diagrams parallel to the running test.

An important example for the manifold test methods are viscosity measurements with a measuring extruder equipped with a rheometric capillary die head. The relevant data are recorded and evaluated automatically by the WINExt software.

In the measuring extruder / Extrusiograph®, the sample material is plastified under practice-oriented conditions and extruded through the die head. All measuring values such as torque, melt temperature, melt pressure are recorded continuously and represented in the form of tables and diagrams parallel to the current test.

The extrudate is tested for various criteria:

  • Uniform plastification, gloss, gels
  • Color dispersion and color matching
  • Transparency and formation of streaks, e.g. with transparent materials
  • Swelling and contraction behaviour
  • Segregation of individual recipe components of a compound at the die and/or at the screw`s tip (e.g. titanium dioxide)
  • Output per unit of time, etc


Besides, subsequent mechanical material tests can be run with the extruded specimens.The Brabender® measuring extruders and Extrusiograph® can be mounted very quickly and easily to the drive unit. The torque is transmitted electronically which protects both the drive unit and the measuring extruders and Extrusiograph® from damage due to
overload.

For each measuring extruder/ Extrusiograph®, different screws are available. The screws are made of special steel, the flight basis and the lands are chromium-plated. Single- and multi- stage screws with various compression ratios and different lengths are available for testing a large range of materials.

All Brabender® measuring extruders and Extrusiograph® consist of an extruder barrel with honed and nitrided bore, water-cooled feed zone, and various heating or heating/cooling zones with electric heating and air cooling. The measuring extruders and Extrusiograph® have additional solenoid valves for controlled cooling air supply to the individual heating/cooling zones.

The temperature of the individual extruder zones is controlled and displayed by self-optimizing electronic temperature controllers. Two threaded bores (1/2" x 20 UNF) opposite each other are provided at the end of the barrel of each measuring extruder for taking a thermocouple and a pressure transducer for measuring the temperature and the pressure of the melt in front of the die channel. 

WINExt / EXTCor32

Evaluate your measuring results according to the most recent standards with the user-optimized Windows® software.

On-line diagrams keep you informed of progress and evaluation results through the test.

The WINExt software saves your data in MS Access® databases to allow processing of the stored values with commercial office programs and implementation of the data in your own spreadsheets.

Use the special data correlation program EXTCor32 for further analysis. Compare the results of different tests of one or several test series within a single diagram. Automatic calculation and numerical and graphical display of mean values and standard deviations make it easy to spot irregularities, assess trends in data or compare against standards. Determination of mastercurves acc. to the time-temperature superposition principle is another outstanding feature of this software.

A snap-shot function is standard in the programs and enables import of data from the Windows® clipboard into other applications.

Type Ø [mm] Length Material Max. Temp. [°C] Output [kg/h] Drive Special
features
Extruder
19/10 DW		 19 10 D Elastomers 300 0.5 - 5 Plastograph®, Lab-Station - Feed roll, 2 measuring bores
Extruder
19/15 D		 19 15 D Elastomers 450 0.5 - 5 Plastograph®, Lab-Station +10 D Pin barrel
Extruder
19/20 D		 19 20 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 5 Plastograph®, Lab-Station 2 measuring borers
Extruder
19/20 DN		 19 20 D Ceramics liquid 350 0.5 - 5 Plastograph®, Lab-Station Grooved barrel
Extruder
19/25 D		 19 25 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 8 Plastograph®, Lab-Station, Stand-alone 2 measuring bores
Extrusiograph® 19/25 D 19 25 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 8 Plastograph®, Lab-Station, Stand-alone 6 measuring bores
Extrusiograph® 30/20 D 30 20 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 15 Lab-Station, Stand-alone 4 measuring bores
Extruder
30/25 D		 30 25 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 15 Lab-Station, Stand-alone 2 measuring bores
Extrusiograph® 30/25 D 30 25 D Thermoplastics, Thermoplastic elastomers, others 450 0.5 - 15 Lab-Station, Stand-alone 6 measuring bores

Brochure Measuring Extruders and Extrusiograph – Single Screw Extruders

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Brochure Measuring Extruders Recommendations Concerning Technical Application

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