The component is partially filled (generally 60-90%) and the melt is then inflated with fluid by means of an injector close to the sprue.
If the melt is displaced with a projectile as well as with the fluid, the process is called projectile injection technology (PIT). This can be combined with various filling methods as well as different fluids.
The component is completely filled and the melt is then forced back into the screw unit by means of fluid or a projectile.
The component is completely filled and the melt is then forced into a secondary cavity by means of fluid or a projectile.