Most quick die and quick mold change systems use advanced hydraulic pumps to generate the required hydraulic pressure. Many press machine operators do not understand how important it is that a suitable hydraulic pump is used to control the system. With lower quality hydraulic pumps, when supplied pressure is insufficient dies and molds can get damaged as they are not securely clamped in place during pressing or injection molding operations.
Before you select a pump for your Hydralic Pressure Unit (HPU), you must calculate your pressure and flow requirements. To calculate flow required by your hydraulic pump, you must know the size and velocity of the actuators it will power. It is important to calculate the maximum flow required during simultaneous actuator operation, such as a motor and cylinder working in tandem. You must always factor efficiency in your calculations, so as not to lead to disappointment during commissioning.