Process Settings Wizard - 2nd Injection Settings dialog

This page of the Process Settings Wizard is used to specify the following for a Co-injection Molding or Thermoplastics Bi-injection Molding process analysis:

• Process settings specific to the second injection unit, which controls Material B and
• Certain process settings shared by the first and second injection units.

Prerequisites

Analysis technology: Midplane mesh

Molding Process: Co-injection molding or Thermoplastics Bi-injection

Analysis sequence: Includes Fill or Fill+Pack

Dialog location

Click (Home tab > Molding Process Setup panel > Process Settings > Next).

All solver parameters have a default value that is suitable for most analyses.

Note: Some of the items listed below may not be available on the current dialog.

General settings

Dialog element	Explanation
Melt temperature	The temperature of the molten plastic, or melt, as it starts to flow into the cavity. In cases where this is an input box, enter the required melt temperature. Note: If the model has a runner system, the melt temperature refers to the temperature of the melt as it enters the runner system. If the model does not have a runner system, the melt temperature is the temperature of the melt as it exits the gate(s). The melt temperature cannot be lower than the Transition temperature.
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. Injection time Enter the time required to inject material B Flow rate Specify the flow rate of material B Relative ram speed profile Select between %Flow rate vs %shot volume or %Ram speed vs %stroke. Click Edit profile and enter the filling control profile settings. Absolute ram speed profile Specify an absolute ram speed profile. Select one of the following: Ram speed vs ram position Flow rate vs ram position %Maximum ram speed vs ram position Ram speed vs time Flow rate vs time %Maximum ram speed vs time Click Edit profile and enter the filling control profile settings.
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/ram position/injection pressure/hydraulic pressure/clamp force/injection time Specify the parameter value at which the switch-over from velocity control to pressure control should occur. By pressure control point Select a pressure control point inside the cavity. Once the specified pressure is reached at the node that represents the pressure control point, 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 whichever comes first Click Edit switch-over settings to select which criteria to monitor. 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. For example, Packing pressure vs time controls the packing phase of the molding cycle as a function of injection pressure verses time. Select the required control method, click Edit profile, and then enter the pressure profile.
Switch to the other controller by (Co-injection only)	Define the maximum % filled by the second material before switching to back to the first controller.
Fiber orientation analysis if material is fiber-filled	Enables a Fiber orientation analysis if material B includes fiber.
Second injection unit options	Click this button to display the advanced options dialog for the second injection unit, which controls material B.