About this result
The Warp result indicates this area of the part may have severe warpage problems. The out-of-plane deflection are close to or exceed the specified nominal maximum deflection (NMD) value due to shrinkage.
What to do next
When the out-of-plane deflection exceeds the specified nominal maximum deflection (NMD) value due to shrinkage, there are a number of alternatives available to improve the moldability of your part:
Note: If you have previously reduced orientation effects, the differential shrinkage effects may be quite different to those found in the original part model because of changes to gate locations, or part thickness etc.
- Use a packing profile
- The first option to consider when reducing differential shrinkage is the use of a packing profile. This is dependent on the machine response time and its effectiveness may be limited for thin parts, or parts with complex geometries.
Note: The advantage of using a packing profile to reduce warpage is that this does not involve changing the design specifications of the part.
- Reduce part thickness variations
- If the part consists of a complex and thin geometry, this can cause filling difficulties which require high injection pressure to complete the filling. If altering injection pressure is not possible, the part geometry may need to be altered.
- Use mold inserts
- The final alternative for reducing differential shrinkage is to consider the use of mold inserts to reduce shrinkage due to variations in cooling rates.
Note: Mold insert analysis is only available in Autodesk Simulation Moldflow Insight.