A packing/holding profile is used to control the packing and holding phases of the molding cycle. You can use either hydraulic pressure, packing pressure, a filling pressure factor, or % Maximum machine pressure to specify the pressure in the packing/holding profile. The profile only needs to describe the time when a packing pressure is applied.
It is used after the velocity/pressure switchover point has been reached at the end of filling. Packing profiles are used to control the volumetric shrinkage distribution, and to avoid overpacking and related problems. The profile only needs to describe the time when a packing pressure is applied.
Note: You do not need to enter the cooling time in a packing profile.
- Ensure that you have selected an analysis sequence that includes Fill + Pack.
- Click
(). - You may need to select Next to step to the Fill+Pack Settings page of the Process Settings Wizard, and then click Edit profile....
- Enter the packing profile data into the table provided. The left-hand column represents the time in seconds, and the right-hand column pressure values.
Note: In order to specify a constant pressure profile, you must specify instant profile steps, that is, steps with a duration of 0 seconds.
- Click Plot Profile to preview the profile you have entered.
- Click Close to close the plot profile, then click OK.
- Select Automatic from the Cooling time drop down menu to have the cooling time calculated during the Fill+Pack analysis, or deselect it to specify the cooling time manually.
Note: The cooling time is the additional time after the end of the packing phase. This time allows the part to freeze at at least 80% through the thickness and become solid enough to be ejected.
- Click OK to close the dialog.