Enter a value between -1 and 1 to specify the initial conversion (curing) level at the injection location.
For molding of reactive materials, the reaction process is not typically initiated in the barrel or transfer molding pot. The barrel or pot temperature is set low enough so 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 very small, prior to injection.
One way to estimate the initial conversion is to quench a small material sample being injection through the nozzle or plunger, then perform a DSC experiment to measure the residual conversion. 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 level of conversion, enter a value between -1 and 1 where: