INJECTION MOLDING MACHINE PISTON ASSEMBLY Russian patent published in 2019 - IPC B22D17/20 

FIELD: metallurgy.

SUBSTANCE: invention relates to the metallurgy. Injection molding machine piston assembly contains interconnected piston and the rod with a longitudinal channel, installed in the rod longitudinal channel with a gap one-piece tube, at that the tube is made with the hollow shank, at which end the disk is installed, placed without gaps between the rod front end and the piston cavity bottom, in the disk the transverse windows are made, that extend into its dead cavity, made as the shank cavity continuation, and into the piston cavity, and in the rod rear part walls the transverse windows are made that extend into its longitudinal channel. Disk rear end is inseparably connected to the rod front end with the formation, together with the disk and the piston side surfaces, of the annular groove for the sealing element, disk is made with a large and small cavities, the shank cavity and the disk large cavity are made with the rod longitudinal channel transverse dimension, the tube front end is inseparably fixed in the disk small dead cavity.

EFFECT: technical result of the invention is increase in the piston assembly durability.

1 cl, 2 dwg