Line-synchronization mold changing device of press machine

The utility model discloses a line-synchronization mold changing device of a press machine. The system comprises mold changing carts arranged on the two sides of the press machine, wherein each mold changing cart comprises a small cart body, a push-pull mechanism and a cushion plate; the upper surface of the small cart body is provided with supporting rollers for supporting the cushion plate to slide towards the press machine; the upper surface of the small cart body is provided with a push-pull mechanism which is driven by a mold changing motor to move in a reciprocating manner towards the press machine along a table top; and the push-pull mechanism is provided with a push-pull head for hooking a push-pull ring on the side surface of the cushion plate. The line-synchronization mold changing device disclosed by the utility model has the advantages that the problems of long working time, large equipment wear and poor positioning accuracy and the like of the original mold changing device are solved; and simultaneously, the control of the press machine and the control of an automatic mold changing system are integrated, the automatic and synchronous mold change is realized by one-key operation of the whole line pressing machine, the operation is flexible, the mold changing time is shortened to 8 minutes per time and the production efficiency is greatly increased.