Injection device of plastic injection molding machine

The utility model discloses an injection device of a plastic injection molding machine, which relates to the technical field of plastic injection molding machines and comprises a base, an injection cylinder mounted on the base, a feed hopper fixedly communicated with the injection cylinder, a check valve mounted in the injection cylinder and an injection rod arranged in the injection cylinder. One end of the spraying rod penetrates through the spraying cylinder and extends out of the spraying cylinder, and a shell is fixedly connected to the base. The spraying device is reasonable in design structure, the spraying rod can rotate and move through the driving assembly, when the spraying rod rotates, under the action of the spraying cylinder, plastic particles can be heated and melted and then conveyed to the check valve, when the spraying rod transversely moves, plastic liquid in the spraying cylinder can be sprayed in a pressurized mode, and the spraying efficiency is improved. The spraying pressure of the pla