Fill-Pack Parameters PropertyManager

The Fill - Pack Parameters PropertyManager defines the fill and pack process parameters that apply to the entire process and environment, rather than to a specific injection unit.

To open the Fill-Pack Parameters PropertyManager:

  • In the PlasticsManager, expand Global Parameters , and double-click Fill-Pack .

General

Gravity Downward Direction for Fill Specifies the direction of the gravitational force in the global coordinate system.

Select one of the global coordinates X-, Y-, or Z- to define the direction of the gravitational force.

Venting Analysis

In a standard simulation, the presence of air in the cavity is ignored. However, Venting analysis allows you to include the effect of the air, and the pressure that it might exert on the melt front.

Cavity Initial Air Pressure (MPa) The initial air pressure for an empty cavity is 14.7psi or 0.1MPa by default.

Cavity Initial Air Temperature (°C) The initial air temperature in the cavity is the room temperature by default.

If you run a Venting analysis, you must define vent locations in the cavity. A Venting analysis identifies and tracks bubbles that might form and coalesce in the cavity away from air vents and computes the pressure that develops in them. See Air Vents PropertyManager.

Recommendation: Do not define any air vents for the first analysis. Use the Venting Pressure result to guide air vent placement, and avoid placing them where they are not required.

Thermoset Material Ejection Criteria

Curing-based Directs the solver to continue the curing simulation until the material reaches the specified target curing level, eliminating the guesswork of determining the curing time.
Time-based Sets a specific curing time for the solver to complete the thermoset curing simulation. After you run the simulation, you can review the results to determine the percentage of curing achieved across your model and adjust the curing time to either shorten or extend the process.
Material’s Target Curing Level at Ejection (%) Sets the percentage of curing at which the thermoset material reaches its gelation point—where its viscosity becomes infinite, and it loses the ability to flow. Curing beyond this level is not beneficial and only adds to the manufacturing cycle time. This characteristic is an intrinsic property of the material determined through characterization, typically provided by the material manufacturer.
Initial Conversion (%) Sets the initial percentage of curing for a thermoset material. Some thermoset polymers would have already started to cure prior before the start of the injection cycle. Typically, the material manufacturer provides this information. You can specify the percentage of initial curing to accurately predict the curing during the molding cycle.
Volume % Above Target Curing Level at Ejection Sets a threshold volume percentage that determines the ejection point. The default setting is 90%, meaning the part is ejected once 90% of the plastic volume reaches the target curing level.
Solver Settings Provides access to the Advanced Settings for Fill/Pack Solver.

Accept the default values of the solver settings to produce the best results over a wide range of cases. For most analyses, you do not need to modify the solver settings.