Film ironing head, film ironing machine and film ironing method of bottle cap sealing film

The invention discloses a film ironing head, a film ironing machine and a film ironing method of a bottle cap sealing film. The film ironing head comprises a main body, a hot-pressing head, a hot-pressing lug and a heater, the hot-pressing head is arranged at the end of the main body; the hot-pressing lug is arranged on one side of the hot-pressing head and corresponds to the lug of the sealing film; and the hot-pressing lug is coupled with the edge of the bottle cap during hot pressing. The film ironing machine comprises a film ironing head and a first support, and the film ironing head is arranged on the support. The method comprises the following steps: conveying the bottle cap below the pre-ironing head; the sealing film is positioned to the bottle cap through the pre-ironing head; bottle caps and sealing films are conveyed to the position below the film ironing head, and the convex lugs are aligned with the hot-pressing lugs; the film hot-pressing head fixes the sealing film to the bottle cap through hot