Tire vulcanization inner die driven by double nuts

Abstract

The invention relates to a tire vulcanization inner die driven by double nuts. The tire vulcanization inner die driven by the double nuts comprises a telescopic mechanism and a transmission mechanism, wherein the telescopic mechanism is mainly composed of a narrow drum tile telescopic mechanism and a wide drum tile telescopic mechanism, the narrow drum tile telescopic mechanism comprises a narrow drum tile, a narrow drum tile lateral connecting rod and a narrow drum tile radial sliding block, and the wide drum tile telescopic mechanism comprises a wide drum tile, a wide drum tile lateral connecting rod and a wide drum tile radial sliding block; the transmission mechanism comprises a screw rod, a wide drum tile nut, a narrow drum tile nut and a radial disc guiding rail. According to the tire vulcanization inner die driven by the double nuts, radial expansion and shrinkage of the die are achieved through cooperation of a mechanical mechanism screw pair, the interference problem of the wide and narrow drum tiles is avoided by designing different screw pitches of two pairs of threads, the die is symmetrical in overall structure, uniform in stress and small in abrasion, the shrinkage rate is improved compared with an existing metal inner die, the problems that a capsule is not completely expanded, the structure is not symmetrical, the service life of the capsule is short, replacement is frequent and the like in an original vulcanization process are solved, and meanwhile, the problems of low shrinkage rate, high processing cost, short service life and the like of the metal inner die are solved.

Description

technical field [0001] The invention relates to the field of tire production equipment, in particular to a tire vulcanization inner mold. Background technique [0002] The basic principle of the tire vulcanization process is to apply high-strength vulcanization pressure to the green tire through the cooperation of the inner mold and the outer mold, and at the same time transfer heat to the green tire by the high-temperature steam (or superheated water) inside the mold. Under the action of pressure, a chemical crosslinking reaction occurs between the rubber material inside the green tire and the vulcanizing agent, and the final finished tire is endowed with good mechanical properties and pattern appearance. The tire shaping vulcanizer is the special equipment for tire vulcanization that is widely used based on this process. [0003] There are certain defects in the existing vulcanization process. Most of the tire shaping vulcanizers use bladders as the inner mold. On the one...

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a rigid inner mold for tire vulcanization, which attempts to solve the problems of incomplete expansion of the bladder, structural asymmetry, and poor structural stability in the original vulcanization process. Compared with the existing rigid inner mold, it can Increase the expansion and contraction ratio of the mechanism, simplify the mechanical structure, improve the running stability, reduce the wear of parts, prolong the service life of the mold, can greatly increase the vulcanization pressure, improve the distribution of tire rubber in the molten state, and then improve the dynamic balance and Uniformity, optimizing the overall quality of the finished tire

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