Super-heat-conduction high-wear-resistance hot nozzle hot runner device

Abstract

The utility model discloses a super-heat-conduction high-wear-resistance hot nozzle hot runner device which comprises two groups of hot nozzles, a heat conduction and insulation structure is arranged outside the hot nozzle, and a blocking structure is arranged inside the hot nozzle; the heat conduction and heat preservation structure comprises a heat conduction layer close to the inner side and a heat preservation layer close to the outer side. A heating wire is coiled in the heat conduction layer; the blocking structure comprises a limiting ring arranged in the hot nozzle and close to the upper end, and a hollow cylinder is fixedly connected to the lower portion of the limiting ring. A blocking cylinder is movably arranged at the middle end of the limiting ring, the blocking cylinder is hollow, an opening is formed in the lower end of the blocking cylinder, and an extension cylinder is elastically and slidably arranged in the opening. By means of the blocking structure, melt can eject the blocking cylinder downwards when flowing normally, the limiting ring is blocked by the blocking cylinder when pressure is insufficient in the later period, the backflow phenomenon of the melt can be reduced, and it is avoided that the melt is blocked at the narrow position of the inner diameter of the lower end of the hot nozzle.

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