Soft hard coextrusion fin for automobile wiper and manufacture method thereof

The invention discloses a soft hard coextrusion fin for an automobile wiper and a manufacture method thereof. On the basis of the theory of aerodynamics, the spoiling surface with special arc is adopted, the air resistance of the wiper acts on the surface of the fin when an automobile drives, the force is beard evenly, the produced pressing force can act on the entire wiper wiping sheet directly to allow the same to fit to the automotive windshield tightly, the wiper is capable of wiping water on the glass better, and vibration is avoided; the wiper is capable of realizing normal functions in various environments, the operation noise is reduced, the service life is prolonged, the structure is simple, size is small, the passenger's vision can be expanded, the assembly and installation are facilitated during replacement, the wider spoiling surface is capable of shielding ultraviolet rays, and the service life of a wiper rubber stripe can be prolonged greatly.