Packing/holding profiles are used during the packing and holding phases to reduce defects in the part due to uneven shrinkage, warpage, and overpacking.
You can use a constant profile or a linear profile.
Following are three examples packing profiles, the tables below each profile provides the values used to achieve them.
Note: The end of fill occurs at 2 sec in the following examples.
Example 1. Constant profile
| Duration (sec) | Pressure (MPa) |
|---|---|
| 0 | 20 |
| 8 | 20 |
| 0 | 0 |
Example 2. Linear profile
| Duration (sec) | Pressure (MPa) |
|---|---|
| 0 | 20 |
| 5 | 20 |
| 3 | 0 |
Example 3. % End of fill pressure vs time (linear profile)
| Duration (sec) | Pressure (%) |
|---|---|
| 0 | 60 |
| 5 | 60 |
| 3 | 0 |