Main/press cylinder for pipe extruder and extrusion press has projecting rod with integrated advance and retraction cylinder and hollow bore containing a tube

摘要

The cylinder has a press piston with projecting rod. The rod (9) has an integrated advance and retraction cylinder (12). It has an axial hollow bore (13), which forms a pressure chamber (18) and contains a tube (15). The tube is concentrically enclosed by a jacket housing (17), so that a ring gap (16) is formed, which is in flow connection with the pressure chamber. A tube end projecting from the housing is together with the housing, fastened to a hydraulics connection block (14). This has a pipe connection (23,24) opening into the tube and the ring gap.