Film-coated rubber plug forming die and forming method

The invention relates to the technical field of forming dies, in particular to a film-coated rubber plug forming die and a film-coated rubber plug forming method. The rubber plug forming die comprisesan upper die core and a lower die core, the lower die core is provided with a first cavity and a second cavity which communicate with each other from top to bottom. Because the first cavity formed bythe rubber plug crown part and the second cavity formed by the rubber plug neck part are arranged on the lower die core, the heated rubber sheet with flowability can only flow from top to bottom in the lower die core in the vulcanization molding process of the rubber plug, the flowability is low, and the possibility of deviation of a coating film on the surface of the rubber sheet caused by flowing is reduced. Besides, in the forming process of the rubber plug, a first convex column extends into the first cavity and can be matched with a second convex column to clamp a to-be-vulcanized rubbersheet, so that the positio