scrap press

grabcad

The moving jaw of a scrap press is actuated by a double-acting hydraulic cylinder. The cylinder is required to advance faster at the start of the pressing operation, when the required press force is still low, than at the end, at which time a higher press force is required. The volume of oil on the piston-ring side is to be used as an additional source for the rapidtraverse advance stroke. This is achieved by means of a 4/3-way hand lever valve. A throttle valve is provided for speed adjustment.