Self-supporting optical cable sheath extrusion die

The invention discloses a self-supporting optical cable sheath extrusion die which structurally comprises a supporting seat, an upper module and an injection molding port. The upper module is movablymatched with the top of the supporting seat. When the die is used for injection molding of a sheath, as a polypropylene solution is easy to be scorched into particles and accumulated on the inner wallof a forming cavity, the polypropylene solution flows to push an eliminating block to move along the inner wall of the forming cavity and a brushing block on the top of a moving block of the eliminating block eliminates the scorched particles on the inner wall of the forming cavity to reduce the probability that the scorched particles are accumulated on the inner wall of the forming cavity, so that injection forming of the sheath is protected favorably. A using time of the protecting sheath is not changed. As the particles brushed by the brushing block fall downward and are easily blended inthe solution, the scorched