Wels CampusEngineering

selfmade tribometer for plastics bulk material

In the processing of plastics with screw plasticising units, the properties of the bulk material often play a decisive role. If the same material is present in different bulk forms (powder, granules, different granulate forms), this can have a great effect on its behavior during processing. In addition to feed behavior, friction — and thus the conveying as well as the melting
behaviour — also changes markedly when a different granule geometry is used. This plastics tribometer enables the measurement of several properties of plastic bulk goods relevant to their processing. In addition to tribological properties such as friction and wear, bulk density and the melting behavior can also be analysed. Tribological tests can be carried out at speeds of up to 1.5 m/s. Pressures of up to 200 bar and temperatures of up to 300° C are possible. Apart from practical research, this apparatus is also used to carry out basic research for a better understanding of the basic behaviour of plastic bulk goods during processing (extrusion, injection molding) and create new computational models.

Technical Data

  • Measurement of the external coefficient of friction as a function of speed, pressure and temperature
  • Determination of wear and wear mechanisms
  • Measurement of the bulk density of granules and powders
  • Measurement of melting behaviour
  • Speeds up to 1.5 m/s
  • Pressures up to 200 bar
  • Temperatures up to 300° C