Automobile trunk lid inner plate assembly, trunk, automobile and machining method

The invention belongs to the technical field of car trunks, and provides a car trunk lid inner plate assembly, a trunk, a car and a machining method.The car trunk lid inner plate is arranged to be a plastic plate which comprises a plurality of reinforcing ribs and is integrally formed in an injection molding mode, and on the basis that the reinforcing ribs meet the strength requirement, the reinforcing ribs are arranged on the plastic plate; compared with a mode of welding a steel plate or an aluminum plate, the plastic trunk lid inner plate obtained through integral injection molding has the advantages that the weight is greatly reduced, and the endurance mileage of an electric automobile can be increased; meanwhile, before injection molding of the trunk lid inner plate, the hinge reinforcing plate and the lock reinforcing plate are placed in an injection mold and integrally subjected to injection molding with the trunk lid inner plate, so that the size adaptation error of the joint of the trunk lid inner pl