Hydraulically-driven arrangement for linearly moving mass body e.g. inlet flap, in plastic spraying machine, has stroke areas attached to accumulator that is connected with connections and with connection line on side in direction of valve

摘要

The arrangement has a working cylinder (11) comprising a piston (12) with a piston rod (13) that acts together with a mass body (10), where the cylinder is designed as a control cylinder. Control valves (16a, 16b) for controlling movement phases of the body are connected with respective stroke areas (14, 15), and a connection line (23) has a non-return valve (24). The stroke areas are attached to a common accumulator (45) that is connected with connections formed at the control valves and with the connection line on a side in a passage direction of the non-return valve. The control valves are designed as three-position-control valves or four-position-control valves.