| Pressure at End of Packing
|
Plots the pressure at various part
locations at the end of the packing phase. At the end of packing,
most of the part is expected to have near zero pressure because of
the solidification process of the injected polymer. The presence of zero pressure combined with
locations with small pressure range (min/max value) is a good
indicator of an effective packing stage.
|
| Temperature at End of Packing
|
Provides a snapshot of the
temperature across the part at the end of the packing phase. The
outside region (skin) has a much cooler temperature (blue color), as
it is in contact with the cooler mold surface. Use the clipping plane to look for high temperature regions
through the thickness (red color).
|
| Central Temperature at End of Packing |
Plots the
temperature in the core layer of the part at the end of the
packing phase.
Available for Shell Mesh. |
| Average Temperature at End of Packing
|
Plots the average temperature
across the wall thickness at the end of packing phase. Available for Shell Mesh.
|
| Temperature at Post-Filling End |
Provides a snapshot of the temperature across
the part at the end of the cooling phase (post-filling) just
before the part ejection. The software calculates these
temperature values at the time when 90% of the part volume is
below the polymer material ejection temperature, which is
generally the heat deflection temperature under load
(HDTUL).
The outer region of the part (the skin) has a
much cooler temperature shown in blue, as it is in contact with
the cooler mold surface. Use the clipping plane to look for high
temperature regions through the thickness of the part shown in
red.
If there is a large temperature differential
in thicker regions of the part, several defects may occur such
as: sink marks, internal voids, or extreme warpage. To reduce
such defects, try designing the part with a uniform wall
thickness.
Available for Solid Mesh.
|
| Central Temperature at Post-filling End |
Plots the temperature in the core
layer of the part just before part ejection. Available for Shell Mesh.
|
| Average Temperature at Post-filling End |
Plots the average temperature
across the wall thickness just before the part ejection. Available for Shell Mesh.
|
|
Bulk Temperature at End of
Packing
|
The bulk temperature plot
indicates where material has cooled down to the mold temperature
(blue), and where material is still molten (red or yellow). The
software calculates the changes in melt temperature during the
packing stage from parameters such as time, mold temperature, and
part wall thickness. |
|
Density at End of Packing
|
The Density at End of Packing plot can determine how
effectively a part has been packed. Variations in density lead to
potential problems in nonuniform shrinkage and warpage. Areas with
low density are also susceptible to void formation. |
| Shear
Stress at End of Packing |
Shear stress is a measure of the
shear force the plastic material is undergoing within the cavity.
Certain materials are very shear-sensitive, and therefore simulation
can be useful to gauge whether the shear stress exceeds the
material’s recommended maximum shear stress (look up this value in
the material properties). Excessive shear
stress can degrade the material and cause visual defects, which
are undesirable especially for aesthetic parts.
|
| Shear
Rate at End of Packing |
Similar to shear rate, this result
can be used to gauge whether the shear rate for your design exceeds
the material’s maximum shear rate. |
| Volumetric Shrinkage at End of Packing |
Plastic materials experience
shrinkage in volume as they go through a phase change from liquid
(filling stage) to solid (packing/cooling stages). High rates of
shrinkage occur in areas of the plastic part that do not undergo
sufficient packing stage. Uniform shrinkage throughout the part is
desirable. If the range of the volumetric
shrinkage is relatively high for your design, try to optimize
the part design (uniform thicknesses are desirable) and mold
design (packing pressure/time, gate size, number of gates, and
gate proximity to high shrinkage areas).
|
| Freezing Time at Post-Filling End |
The Freezing Time plot indicates
the time it takes for the plastic material to cool down to its
transition temperature. The freezing time depends on the temperature
differential between the melt temperature and the mold temperature,
and on the thermal conductivity between the melt and mold. For solid meshes, use the Clipping Plane mode to view the
freezing time of elements at the interior.
|
| Residual Stress at Post-Filling End |
During the injection molding
process, the polymer is exposed to thermal and physical stresses.
Residual stresses are forces locked within the polymer as it cools
from the molten state through the glass transition temperature. The
residual stresses are a result of the nonuniform cooling and
pressure variations that occur in the viscoelastic polymer material
during molding. A part with high levels of
residual stresses might fracture, or it might undergo other
physical changes after molding such as warpage.
|
| Skin
Material Fraction at Post-Filling End |
Plots the fraction of the first
injected material when Co-Injection or Gas-assisted injection is
used. Available for Solid Mesh.
|
| Curing Time at Post-Filling End |
Indicates the time it takes for
the thermoset material to react. The curing time depends on the
curing kinetics of the material (see ). |
| Material Reaction Conversion at Post-Filling End
|
Plots the degree of conversion
(reaction) of the thermoset material just before the part
ejection. |
| Frozen Area at Post-Filling End |
The green areas of the plot
represent areas that have frozen solid (temperature is below the
material’s glass transition temperature). The red areas of the plot
are still above the glass transition temperature at the end of the
post-filling (just when the part is ready to be ejected from the
mold.) Ideally, there should be none to very
small areas of red color. Use the Isosurface Mode (Minimum: 0.9
/ Maximum: 1) to display the regions that are not
frozen.
Available for Solid Mesh. |
| Frozen Layer Fraction at Post-filling End |
Plots the fraction of wall
thickness that is solidified just before the part ejection.
Available for Shell Mesh. |