PLM 2014 Annual European PLM Summit location:Berlin, Germany date: October 2014 vol:2014 pages:/-/
PLM Europe edition:2014 location:Berlin date:6-8 October 2014
Within the research group Propolis at KU Leuven Kulab, research is performed on the processing of polymers. Another focus within the research group is the mechanical performance of produced parts or processing equipment. For both the processing and performance, adequate numerical simulation tools are used.
During a project concentrating on co-extrusion of two materials, too high deformation from the die part dividing the two flow paths was noticed. This was also the case for the outer part of the mould. This problem was approached in two steps. First of all the current situation was modelled to look for the validity of the built approach. Initially, the internal pressure as function of position within the extrusion die was determined using appropriate industry oriented numerical simulation tool for profile extrusion. Starting from the measured viscosity behavior in combination with the processing settings, the pressure profile along the extrusion die could be calculated. This data was used to be fed into the Nastran solver module to look for the deformation of the specific parts of the die. Based on the good correlation between the numerical simulation model and the experiments, proposals were checked using numerical simulations to lower the deformation of the specific die part.
Changing the die design resulted in lower pressure values along the extruder die resulting in a lower deformation of the specific die part satisfying the extrusion company.