The Profile/Switch-Over Control tab of the Process controller dialog is used to specify default values for injection unit related inputs of various analysis types.
General settings
- Filling control
- Specifies the method by which the filling phase of the analysis is controlled.
Select the method to control polymer injection during the filling phase.
Note: If you select Ram Speed Profile, you must select the profile variables, and enter the profile.
- [Relative/Absolute/Legacy ram speed profile] by
- Specifies the two variables by which the ram speed profile is controlled.
Select the ram speed control method from the drop-down list.
- [Injection time] of
- Specify the time it takes for the part to fill completely.
Click Edit profile and enter the ram speed profile.
- [Flow rate] at
- Specify the flow rate of the polymer as it is injected into the mold cavity.
- Velocity/pressure switch-over
- The criteria by which the molding machine will switch from velocity control to pressure control.
Select the required switch-over method in the drop-down list, and then specify the switch-over point.
Note: On a typical molding machine, the standard setting will be 99% of volume filled. If the switch-over is occurring early, look for a short shot or check material compressibility has been taken into account when setting the velocity/pressure switch-over point.
- [By % volume filled] at
- Specify the percentage of volume filled value at which the switch-over point from velocity control to pressure control should occur.
- [By injection pressure] at
- Specify the injection pressure value at which the switch-over point from velocity control to pressure control should occur.
- [By clamp force] at
- Specify the clamp force value at which the switch-over point from velocity control to pressure control should occur.
- Velocity/pressure switch-over by pressure control point
- Specify the switch-over point by selecting a pressure control point inside the cavity. Once the specified pressure is reached at the selected node, the program will change from velocity to pressure control, and the pressure profile will be applied.
Enter the node number and pressure to specify the pressure control point.
- [By injection time] at
- Specify the injection time value at which the switch-over point from velocity control to pressure control should occur.
Velocity/pressure switch-over will occur as soon as this amount of time in the filling phase has elapsed.
- [By ram position] at
- Specify the ram position value at which the switch-over point from velocity control to pressure control should occur.
- [By hydraulic pressure] at
- Specify the hydraulic pressure value at which the switch-over point from velocity control to pressure control should occur.
- By whichever comes first
- Specify the switch-over point from velocity control to pressure control, by setting more than one of the available switch-over criteria.
Click Edit switch-over settings to set the switch-over criteria. Velocity/pressure switch-over will occur as soon as one of the specified criteria is fulfilled.
- Pack/holding control
- Specifies the method by which the pressure phase of the molding process is controlled.
Select the required control method, click Edit profile, and then enter the pressure profile.
Important: For Injection-compression analysis, Pack/holding control controls the injection unit, not the compression unit.
- %Filling pressure vs time
- Controls the packing phase of the molding cycle as a function of percentage filling pressure versus time.
- Packing pressure vs time
- Controls the packing phase of the molding cycle as a function of injection pressure versus time.
- Hydraulic pressure vs time
- Controls the packing phase of the molding cycle as a function of hydraulic pressure versus time.
- %Maximum machine pressure vs time
- Controls the packing phase of the molding cycle as a function of percentage maximum pressure versus time.