An injection molding machine uses two independent hydraulic circuits: one for clamping force and one for injection. Each circuit has its own positive-displacement pump, pressure control valve, and pressure transmitter/controller loop to maintain stable, isolated operation.
Read the decisions behind it.
Use separate positive-displacement pumps for clamping and injection to avoid pressure interference
Assign dedicated pressure control valves and PID instrumentation loops to each circuit
Route both pump suctions from a common hydraulic reservoir while keeping discharge paths isolated
Reuse this structure when a machine or process requires multiple hydraulic circuits with independent pressure control, such as injection molding, hydraulic presses, or multi-axis hydraulic systems.