HOLLOW ITEMS PRESSING DEVICE

摘要

FIELD: machine building.SUBSTANCE: invention can be used for pressing of bushings, rings or thick-wall pipes from powders, mainly from thermosets filled with graphite. Hollow items pressing device includes hollow die, upper and lower compression rams, core and base in the form of "?"-element, which is tightly connected to lower part of die and has a through hole. Upper compression ram is made in the form of a hollow cylinder, and lower compression ram is made in the form of a cross-shaped element, the lower vertical component part of which can be removed and is fixed by means of thread in horizontal component part and installed in through hole of the base with possibility of back-and-forth movement along the pressing axis. Upper vertical component part is made as a part of horizontal component part and used as a core. External side surface of the core and internal surface of the die are coated with antifriction or antiadhesion material or element in relation to the pressed material.EFFECT: device allows enlarging manufacturing capabilities when producing hollow items and provides improved uniform density throughout the item height.9 dwg