Chapter 8 Examples of Hydraulic Systems 8.2.2 Operating principle of hydraulic system of SZ-250A type plastic injection moulding machine Injection moulding machine SZ-250A belongs to a middle and small mould with max.250(cm3)capacity of injection. Fig.8-2 shows the outline of the machine and its hydraulic system.The action sequences of solenoid energized is shown in Tab.8-2 1 Homepage List Upward达s Downwards Retumn ExitChapter 8 Examples of Hydraulic Systems 11 8.2.2 Operating principle of hydraulic system of SZ-250A type plastic injection moulding machine Injection moulding machine SZ-250A belongs to a middle and small mould with max. 250 (cm3 ) capacity of injection. Fig. 8-2 shows the outline of the machine and its hydraulic system. The action sequences of solenoid energized is shown in Tab. 8-2