Student paper

When models start to sweat: pvT measuring cell for high cooling rates

Bachelor’s thesis or master’s thesis

The aim of the work is to develop a pvT measuring cell that generates constant high cooling rates in the plastic.
Stuwi-Wenn Modelle ins Schwitzen kommen_pvT-Messzelle für hohe Kühlraten© IKV
Schematic overview of the design of the pvT measurement cell

Topic of the work:

Filling and cooling simulations are used for tool design and process optimization. The stored pvT model is fundamental for the simulations and influences the prediction accuracy of the calculation. Different cooling rates occur in the plastic during the injection molding process. The pvT behavior of the plastics depends on the cooling rates, but this is not yet mapped within the models and thus leads to a reduction in the predictive accuracy of the simulations. In order to better model the cooling rate dependence of the pvT behavior, a pvT measuring cell is to be developed which enables the measurement of the pvT behavior at constant high cooling rates.

The work is related to this research project:

A pvT measuring cell for high cooling rates is being developed as part of the research project. This pvT measuring cell is to be used to better map the cooling rate dependence of the pvT behavior. Subsequently, practical tests and simulations will be carried out to check whether the inclusion of the cooling rate dependence of the pvT behavior improves the prediction accuracy of the simulation. The aim of the research project is therefore to better investigate material behaviour in order to improve simulations for tool design and process optimization.

Objective:

The aim of the work is to design a measuring chamber geometry that allows high cooling rates at low temperature gradients within the plastic contained therein. In addition, cooling channels are to be designed for this measuring chamber geometry. Attention must be paid to the manufacturability and sensible positioning of the sensors.

Your task:

Determining the minimum sample size Determining the minimum sample size
Design of the sample geometry using simulations in COMSOL Multiphysics Design of the sample geometry using simulations in COMSOL Multiphysics
Cooling design of the measuring cell, taking into account sensible positioning of the sensors Cooling design of the measuring cell, taking into account sensible positioning of the sensors
Validation of cooling through simulations Validation of cooling through simulations
Conceptual design of a control system for fluid cooling

Your profile:

  • Technical or scientific degree (e.g. mechanical engineering, industrial engineering, automation technology, materials science, environmental engineering)
  • Understanding of the material behavior of plastics
  • Interest in simulations and construction
  • Previous experience in COMSOL Multiphysics is helpful, but not necessary

These are your benefits:

  • Varied mix of simulation and construction
  • Work in a young, motivated team
  • Independent work with intensive support
  • Co-design of a current research project

If you are interested in writing your thesis at IKV and in this task, please contact me. I will be happy to explain the exact scope and schedule to you.