Simulationsmodell zur Berechnung von Spritzkopf- und Werkzeugauslegung

01.04.2004 - 31.12.2008
Research funding project
The dimensioning of injection heads during extrusion of rubber profiles is exclusively based on empiric knowledge of the non-linear flow behaviour and the shear thinning properties of elastomer boosted with carbon black. Thus, the design of injection heads is carried out with subject to the used rubber blend, whereas the geometry of the appropiate profile is achieved by empiric adaption of the extrusion die. This so-called truing process is a result of the swelling after extrusion of rubber and is carried out in up to three steps of adaption of the production machine. The disadvantages of the current production process are the process technology which is non-reproducible over a long timeframe and the design of dies which is connected with long development time affecting the capacity of the running production. These weak points will be eliminated by a numerical prediction model for the design of injection heads and dies for the extrusion process of rubber. This numerical model will be based on the development of new and the adaption of already developed measuring methods which describe the viscosity properties of rubber. Thus, suitable material models for the description of the properties of the rubber blends will de developed. These material laws will be used for finite element analyses. The availability of such numerical models allows the identification of arrangements which increase the production and leads to the reduction of a scrap-adjusted quantity of the production of rubber profiles, respectively. The development of computer-assisted calculation tools opens an immense potential for development leading to an important reduction of the development time for new extrusion profiles and to an fundamental cost-efficient attainment of the maturity phase of new production lines.

People

Project leader

Project personnel

Institute

Contract/collaboration

  • Semperit Technische Produkte GmbH & Co KG

Grant funds

  • FFG - Österr. Forschungsförderungs- gesellschaft mbH (National) Austrian Research Promotion Agency (FFG)

Research focus

  • Non-metallic Materials: 30%
  • Computational Materials Science: 20%
  • Materials Characterization: 30%
  • Modeling and Simulation: 20%

Keywords

GermanEnglish
Gummiextrusionextrusion of rubber
nichtlineares Fließverhaltennon-linear flow behavior
Viskositätviscosity
Werkstoffmodell für Gummirohmischungen material model of rubber blends

Publications