Part Cavity

Use the Part Cavity tool to designate, automatically detect, and reorient the part cavities in your model geometry.

Location: Molding ribbon

Designate a Cavity

Define the part cavities, material type, polymer, and temperature for the molding simulation.

Note: You need to designate a part cavity before performing any other operation.
  1. On the Part Cavity icon, click Designate Part Cavity.
  2. Select the part cavity in your model. If your model contains more than one part cavity, select them all.
    The selected parts are displayed in red.


  3. Use the microdialog options to define the material, polymer, and temperature.
    Option Description Note
    Click the View Materials button to examine the material's thermal, rhealogical, mechanical, PVT and fiber properties.
    • You can modify an existing material in the Materials dialog, save it with a new name, and access it from the My Materials tab.
    • You can download additional materials from the Altair Material Data Center, save them locally, and import them into My Materials.
    Select a material type.  
    Select from common polymers of your chosen material type.  
    Enter the temperature of the material.  

Mold Opening Direction

Reorient the mold's opening direction with respect to the part.

You must first designate a part cavity.
  1. On the Part Cavity icon, click Mold Opening Direction.
    The Demolding window appears, along with a gray arrow indicating the direction of the mold opening. The mold will open along the Y-axis. Surfaces likely to bind with the mold, making demolding difficult, are highlighted in red:
  2. Click the Select surface button and select the face of the part that it is perpendicular to the optimal mold opening direction. In the example below, the selection is outlined in yellow.

    The model reorients with the selected face perpendicular to the mold opening direction, which is still parallel to the Y axis.
    Note: Surfaces at an angle from the Y axis smaller than the demolding angle are in a critical orientation to the mold, and may adhere to the mold during the demolding process. Critical surfaces appear in red.


  3. Set the demolding angle.
    Note: The Demolding angle field defaults to 4 degrees, though for most applications, a tolerance of 2 degrees or less is sufficient.