HYDRAULIC DRIVE OF THE PRESS Russian patent published in 1995 - IPC

FIELD: manufacture of building materials. SUBSTANCE: hydraulic drive of the press has a two-positioned bilinear hydraulic control valve. Its feed line is connected with the head end of the hydraulic cylinder, its branch pipe is connected with the cavity of the hydraulic accumulator and with the offset of the reverse valve. The feed line of the reverse valve is connected with the rod end of the press hydraulic cylinder and with the branch pipe of the three fourth of the hydraulic control valve. The second branch pipe of the latter is connected with the head end of the hydraulic cylinder, its feed line is connected with the pump pressure line. Its drain pipe is connected with the drainage through the two-positioned bilinear hydraulic control valve. It enhances the quality of the pressed articles at the small value of the specified power of the drive engine. EFFECT: enhanced quality of pressing the ceramic articles. 1 dwg