The plastic expert

Filling simulation

Trustable base of a good part design

Filling simulation

If one needs to develop a new part, it is vital to understand the filling behaviour of the melt during the injection process.
Valuable results are:
  • Pressure distribution inside the cavity
  • Position of weld lines and air traps
  • Temperature at the melt front
  • Velocity of the melt front
The filling simulation provides insight about the best design of a plastic part.
This knowledge leads to a high product quality and ensures to save raw material and resources.

Filling pattern:

The dynamic view of the flow front shows the position of weld lines and the creation of air traps.
The flow front provides information about needed changes in the flow path of the melt (e.g. flow leader).
Besides of that the main orientation of fibers can be seen.

Pressure distribution:

One important target is to ensure a balanced filling of the part in order to ensure a low pressure demand.
This is important if one want to reduce either wall thickness of the part or clamp force needed during the injection molding process.

Part temperature

The position of hotspots at the end of the filling can be seen.
Another important point to look at is the difference of the melt front temperature.
This gives a good indication if the filling of the part is good or if there are effects of hesitation or high shear of the melt.
Both effects lead to a low quality of the part and shall be avoided to ensure a perfect part.


"It is very important to ensure a balanced filling of the cavity in order to reduce filling pressure."