1. The useful hydraulic control of the hydraulic station system of the horizontal injection molding machine is identical to the hydraulic transmission system. The system also mainly includes power components, control components and performance program components, which also transmit power based on hydraulic oil. The difference between the two lies in the effective hydraulic control of the deterministic reaction equipment. It is determined that the reaction equipment is used for reaction output (displacement, speed, force and other mechanical quantities) It is also compared with the input (the input can also change or move at a constant speed), and the system is controlled by the error after the comparison, so that the output of the execution program component changes or maintains a constant speed with the change of the input. The hydraulic station system, also known as hydraulic servo system or hydraulic servo control system, forms the closed loop loop.

2. The hydraulic station system adopts on-off or logic thinking control elements, that is, adhere to the stability of the set value or simply change the direction, also known as the set value and sequence control elements.

3. The hydraulic station system uses servo control elements with a reaction structure. Electrical equipment is used for useful control. The control accuracy is high, the response time is long, and the pressure and flow of useful control are constantly changing. The output power can be expanded.

4. Proportional control is a useful control between the above components. The commonly used proportional control valve is an electro-hydraulic control component developed on the basis of switching control components and servo control components. It has some characteristics of the above two types of components, and is suitable for situations where the useful control of manual switch cannot meet the requirements, but the useful control of servo valve is not required to pollute.