Automatic injection machine oil cylinder piston rod protection sleeve for sealing element

The utility model discloses an automatic injection machine oil cylinder piston rod protection sleeve for a sealing element. The automatic injection machine oil cylinder piston rod protection sleeve comprises a shield sleeve, a movable plug, fixing plates and a seal ring, wherein the top of the shield sleeve is provided with an inserting hole, and the inner wall of the inserting hole is provided with an internal thread; the movable plug comprises a rotating wheel, a connecting rod and a baffle disk, the baffle disk is arranged in the inner cavity of the shield sleeve, the rotating wheel is arranged outside the shield sleeve, the connecting rod is inserted into the inserting hole, the outer side of the connecting rod is provided with an external thread, and the internal thread fits with the external thread; the fixing plates are arranged at the bottom of the shield sleeve and respectively provided with a fixing hole; the seal ring is connected to the tail end of the fixing plates in a clamping manner. According