Pressure exerted in the hydraulic system. Hydraulic injection pressure is not same as pressure on melt at screw tip. Hydraulic pressure is required to be multiplied with intensification ratio to get pressure on melt at screw tip.
The pressure that is acting on the machine screw during moulding. Hydraulic pressure is developed by pumping oil into the chamber behind the injection ram.
The pressure that exists in a system containing noncompressible fluid.