HYDRAULIC SYSTEM FOR A PRESS

摘要

The present invention relates to a hydraulic system for a press comprising a press ram (2), at least one main press cylinder (1) with a primary side (21) for producing press thrust and a device for returning th e press ram. The hydraulic system comprises at least one flow amplifier (8) with a primary and a secondary side (10, 11) comprising a pist on arrangement (9) with a large active piston area acting on the primary side (10) of the flow amplifier and a small active piston area actin g on the secondary side (21) of the flow amplifier. The primary side (10) of the flow amplifier is connected to the primary side (21) of the main press cylinder, and the secondary side (11) of the flow amplifier is connected to the return device. At least the part between the primary side (10) of the flow amplifier and the primary side (21) of the main press cylinder is closed.