PRESSING UNIT OF DIE-CASTING MACHINE Russian patent published in 2017 - IPC B22D17/20 

FIELD: metallurgy.

SUBSTANCE: pressing unit has a piston 1 connected to a rod 2, in which a longitudinal blind channel 3 is made, a tube 4 positioned in the channel with an annular gap, and a stop in the channel conical bottom connected by transverse ports 8 of the rod to the annular gap 9 between the rod and the piston. The gap is connected to the longitudinal channel 3 by transverse ports 14. The tube rear end is connected to a rod 6, which cavity by transverse ports 22 is connected through annular groove 21 to the transverse port 20 of the rod rear part, and the other port is connected to the longitudinal channel 3. From the rear end of the piston on the rod threaded surface, there is a nut-bushing 15, which front conical surface is aligned with the conical surface of the piston rear end.

EFFECT: enhanced reliability, manufacturability and reparability of unit.

2 cl, 1 dwg