Enter a value between -1 and 1 to specify the initial conversion (curing) level at the start of injection.
For molding of reactive materials, the reaction process does not typically initiate in the barrel or transfer molding pot. The barrel or pot temperature is usually low enough that no significant reaction takes place in them. In the case of rubber compounds, the material exhibits an induction period before curing starts. The melt initial conversion is typically low before injection.
One way to estimate the initial conversion is to quench a small material sample after injection through the nozzle or plunger. Then perform a DSC experiment to measure the residual conversion of the sample. Another way to estimate the initial conversion is by using the material constants for isothermal induction time or isothermal curing kinetics, and the actual temperature and time history of the material before injection.
To specify the initial level of conversion, enter a value between -1 and 1 where:
Typically, the degree of conversion of the material in the barrel or transfer molding pot increases during injection. The rate of conversion depends on the set inlet temperature of the barrel or pot.
For 3D mesh, to disable the conversion progression in the barrel or pot, select the option Keep inlet conversion at melt initial conversion.