Patent ID: 7497527

Claim:
A reshaping device for massive reshaping of workpieces, comprising: a matrix having a movably supported matrix part for ejecting a workpiece, a plunger with a ram associated with the matrix for reshaping the workpiece with the plunger being movable in a direction of plunger movement for moving the ram toward and away from the matrix and for moving the matrix part during a working stroke of the plunger; at least one hydraulic cylinder whose piston is connected with the matrix part for movement therewith, and a passive hydraulic system connected to the hydraulic cylinder and including at least one first pressure storing cylinder, whose inner pressure is preset at a first pressure level and which is connected with the hydraulic cylinder, and at least one second pressure storing cylinder whose inner pressure is preset at a second pressure level which is higher than the pressure level of the first pressure storing cylinder, whereby hydraulic fluid displaced from the hydraulic cylinder during the working stroke of said plunger flows into said pressure storing cylinders, and flows back into the hydraulic cylinder during a return stroke of the plunger.