Michael Stricker, Georg Steinbichler,
"Determination of heat transfer coefficients at the polymer-mold-interface for injection molding simulation by means of calorimetry"
: PROCEEDINGS OF PPS-29: The 29th International Conference of the Polymer Processing Society - Conference Papers, 2014
Original Titel:
Determination of heat transfer coefficients at the polymer-mold-interface for injection molding simulation by means of calorimetry
Sprache des Titels:
Deutsch
Original Buchtitel:
PROCEEDINGS OF PPS-29: The 29th International Conference of the Polymer Processing Society - Conference Papers
Original Kurzfassung:
Appropriate modeling of heat transfer from the polymer material to the injection mold is essential to achieve accurate simulation results. The heat transfer is commonly modeled using convective heat transfer and applying heat transfer coefficients (HTC) to the polymer-mold-interface. The set HTC has an influence on the results for filling pressure, cooling performance and shrinkage, among others. The current paper, presents a new strategy to measure HTC in injection molding experiments using Newtons law of cooling. The heat flux is calculated out of demolding heat (measured by means of calorimetry), injection heat (measured by means of an IR-sensor), cooling time and part mass. Cavity surface area, average mold surface temperature and average part surface temperature lead to the HTC.