Preparation process of polyethylene terephthalate (PET) aluminum plated film

The invention relates to the technical field of aluminum plated film preparation, and discloses an aluminum feeding device for polyethylene terephthalate (PET) aluminum plated film preparation. The aluminum feeding device for PET aluminum plated film preparation comprises a hydraulic cylinder, wherein a push plate is rotatably connected to the end of a piston rod of the hydraulic cylinder; a pushrod is fixedly connected to the side, away from the hydraulic cylinder, of the push plate; a sliding block is fixedly connected to the end, away from the push plate, of the push rod; and a guide rod is hinged to the side, away from the push rod, of the sliding block. According to the aluminum feeding device for PET aluminum plated film preparation, the piston rod of the hydraulic cylinder is extended or shortened by controlling the hydraulic cylinder, the sliding block is indirectly driven to slide in the direction away from or close to an installation block along a sliding rod, the sliding block drives an arc-shaped