METHOD OF PRESSING AND SYSTEM OF POWER DRIVE CONTROL FOR METHOD REALISATION Russian patent published in 2009 - IPC B30B15/16 

FIELD: technological processes; engines and pumps.

SUBSTANCE: method includes serial stages of movable and fixed press elements closure at low pressure, pressing at high pressure and opening of specified press elements, with additional supply of compressed air into power cylinder stem cavity. System of pneumohydraulic drive control is made in the form of three bistable pneumatic valves, outlets of which are connected to stem and piston cavities of working and power cylinders of drive. At that the main pneumatic valve connected by its outlet to stem cavity of working cylinder is connected by the same outlet to stem cavity of power cylinder via reduction gear and check valve.

EFFECT: higher efficiency and elimination of foam generation and losses of hydraulic liquid.

7 cl, 1 dwg, 2 ex