PET Preform Heating Temperature is about 75°C to 130°C on the preforms. So it will need to be adjusted according to the PET preforms` height, thickness, workshop indoor temperature, etc.
A reheating step is then necessary to condition the preforms to the appropriate temperature distribution (slightly above the glass transition, which is typically ~75°C). This stage is generally performed using infrared (IR) heaters, taking advantage of the semi-transparent behavior of PET with regard to IR radiation.
the objective function is reduced by 60% of its initial value after the first iteration, and by more than 80% at the end of the optimization process. Consequently, the thickness distribution of the formed bottle is 80% more uniformed after optimization. The algorithm converges after five iterations, which involves only 10 objective-function evaluations (that is to say, 10 FE simulations). On average, one cost-function evaluation requires 26 min CPU. Thus, the total CPU time required for the optimization is ~ 3 h 20 min.
PET Preform reheat Temperature versus time inside and outside of the PET preforms for the oven configuration from publication.
PET Preform Heating Temperature setting should be consider the heating time of preforms stay in the heating area. It is very important with the preforms moving speed or the production output capacity.
