Determination of processing data: Injection pressure

The injection pressure is the cavity pressure which is measured near the gate. It is applied to fill the mold cavity.

In the pressure curve, it is a characteristic kink between the mold filling and packing phases that can be determined by process data acquisition. This is carried out using suitable molding geometries (preferably a dumbbell test specimen).

Injection pressureInjection pressure as a processing value

The red curve in the graph shows the rise in cavity pressure at a constant injection rate. At the end of the mold filling phase, the calculated injection pressure is present and the packing phase (blue curve) begins.

The dumbbell test specimen is shown above the curve to illustrate the filling phase and the position of the pressure sensor.