Turn-up bladder vulcanizing device and vulcanizing method

Abstract

The invention relates to the technical field of tire forming, in particular to a turn-up bladder vulcanizing device and vulcanizing method. The turn-up bladder vulcanizing device comprises a base, a heating sleeve, a vulcanizing mold, an upper pressing plate and a vulcanizing bladder, the upper pressing plate is fixed to the top of the heating sleeve, the bottom of the heating sleeve is fixed to the base, a turn-up bladder is vulcanized through the external vulcanizing mold and the internal vulcanizing bladder, the vulcanizing degree is uniform, and the vulcanizing effect is good. Bending parts corresponding to the folding parts of the turn-up bladder are arranged on the vulcanizing mold and the vulcanizing bladder, so that the vulcanization quality of the turn-up bladder at the bending parts is guaranteed, rubber fatigue caused by folding of the vulcanizing bladder can be avoided through treatment of the turn-up bladder at the bending parts, and the turn-up bladder produced by adopting the device and the method are high in percent of pass and long in service life.

Description

technical field [0001] The invention relates to the technical field of tire building, in particular to a reverse capsule vulcanization device and a vulcanization method. Background technique [0002] The turn-up capsule is a commonly used device on the tire building machine. It is used to realize the lamination of the inner liner and the cord, and the turn-up operation after the buckle, so that there is no gap between the bead wire and the cord layer. Delamination, no bubble phenomenon. [0003] The raw materials of reverse-wrapped capsules are mainly made of natural rubber, butadiene rubber, carbon black and other auxiliary ingredients, and the made reverse-wrapped capsule embryos need to be vulcanized under certain conditions of time, temperature and pressure to obtain finished capsules . [0004] One of the existing turn-up capsule production techniques is to place the molded vulcanization capsule directly on a special vulcanizer for vulcanization. like Figure 21 As s...

AI Technical Summary

Problems solved by technology

However, this vulcanization method has the following problems: first, when the reverse-encapsulated capsule obtained by this vulcanization method is vulcanized, the folding points of the A surface and the B surface, and the folding points of the B surface and the C surface are prone to adhesion during the vulcanization process , when the reverse-wrapped capsule is inflated, the folded point where adhesion occurs is prone to tearing, reducing the service life of the reverse-wrapped capsule

Second, because the thickness of the folded vulcanization bladder is large, and there is an air gap in the folded part, which affects the vulcanization effect

[0005] The second of the existing reverse-wrapped capsule production process is to adopt a straight cylinder structure vulcanization device for vulcanization, and the vulcanized reverse-wrapped capsule ( Figure 15 )’s A and C faces are folded inward to form the final product, but this process has the following disadvantages. First, water-wrapped cloth is used to fix the vulcanization process. The vulcanization quality depends on the technical quality of the workers. Winding density, angle and strength will have a certain impact on the product

Second, during the turning process of the vulcanized turn-up capsule, due to its small inner radius and large outer radius, the rubber product is prone to fatigue, which will easily lead to cracks in the long run and affect the life of the tire

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