The Fill analysis predicts the thermoplastic polymer flow inside the mold in the filling phase. This analysis is often run as the first part of a Fill+Pack analysis sequence.
A Fill analysis calculates the flow front that grows through the part incrementally from the injection location, and continues until the velocity/pressure switch-over point has been reached. A Runner Balance analysis can be used with a Fill analysis to ensure equal pressure is delivered at each cavity.
A Fill analysis accepts a minimum of 8 and a maximum of 20 laminates across the part thickness to calculate results. The default number of laminates across the thickness is 12. You can change this value by editing the solver parameters.
If symmetrical thermal boundary conditions exist (Cool analysis results are not available), the analysis is based on a half-gap calculation and the actual number of laminates used in the calculation is half of the specified number, reflected symmetrically across the part. Running a Cool analysis prior to running a Fill analysis provides asymmetrical cooling information, and the full specified number of laminates is used to calculate results.
Before running a Fill analysis, pay close attention to the edge length of the mesh around high curvature areas on your model, and make sure the mesh in these areas is not too coarse. It is recommended that you mesh with a smaller edge length so the mesh approximates the corners correctly.
The model has a surface shell mesh, consisting of 3-node, triangular elements. Consistency between the results on the opposite sides is maintained by using "connectors"-elements with zero flow and heat resistance. The connectors are inserted automatically at locations determined according to the geometrical features of the model.
3D analysis technology allows the Fill analysis to directly analyze a volume mesh (4-node, tetrahedral mesh) of a solid model, removing the need for time consuming Midplane mesh preparation of a 3D part model.
The Fill analysis is used to predict the thermoplastic polymer flow inside the mold in the filling phase.
Use this dialog to specify settings for a Fill analysis.
The Fast Fill analysis provides a quick and simple alternative to the standard Fill analysis.
A Fill+Pack analysis predicts the polymer flow inside the mold during the filling and packing phases. This analysis sequence can be used to determine whether a cavity will be completely filled.
Besides analyzing the packing phase of the injection molding process, the Flow analyses support additional simulation features.
This topic describes how laminae are split across the part thickness and how laminae are used in an analysis.
Core shift is the spatial deviation in the position of the core from its original position in the mold before plastic is injected into the cavity.
The bulk shear rate, or representative shear rate is derived from the wall shear stress and the fluidity, which are quantities calculated during an analysis.