Radial tire curing bladder production technology

Abstract

The invention provides a radial tire curing bladder production technology. A present production technology which comprises the steps of burdening, first-segment mixing, second-segment mixing, rubber filtering, molding, curing, polishing and finished product packaging is improved, and the first-segment mixing step is improved to a step of adding raw rubber, adding Gum-easy, a coumarone resin and a processing assistant, adding 1 / 2 of carbon black, adding 1 / 2 of the carbon black, and adding operation oil. The addition of the Gum-easy and the coumarone resin in the production technology makes the rubber fluidity be substantially increased, the intermolecular friction force be reduced and the rubber viscosity be reduced, and the accurate control the die locking time of a die makes the curing temperature be substantially improved and the curing time be reduced, so the product quality is improved. Curing bladders produced through adopting the technology provided by the invention have the advantages of short curing time and improved quality.

Description

technical field [0001] The invention relates to the field of tire production, in particular to a production process of a radial tire curing bladder. Background technique [0002] Tire is a kind of polymer composite material, which is mainly composed of rubber and skeleton materials. With the development of the automobile industry and the demand for energy saving and environmental protection, the requirements for tire performance are getting higher and higher. Ordinary bias tires are no longer suitable. A radial tire is a new type of tire that is tightly hooped on the carcass by a buffer layer arranged in the circumferential direction or near the circumferential direction. The cords of the carcass ply form an angle of 90° with the center line of the tread. The cords do not cross each other. Since the carcass cords are arranged in the meridian direction of the earth, the strength of the cords can be fully utilized. Therefore, the number of cord layers of this tire is reduced b...

AI Technical Summary

Problems solved by technology

At present, when radial tires are vulcanized, the vulcanization bladder is filled with vulcanization medium (superheated water, steam, N2, etc.) It is easily affected by heat, and the double bonds on the polymer chain will be damaged, thereby reducing its physical and mechanical properties and causing the capsule to age. In order to avoid this phenomenon, the current domestic production of capsules for car tires is vulcanized at a temperature of 180°C. The vulcanization time is about 30 minutes. For the production of vulcanization bladders for trucks, the vulcanization condition is 180°C and the vulcanization time is about 60 minutes. However, this vulcanization method requires a long vulcanization time for the vulcanization bladder, so not only consumes a lot of energy, but also Moreover, the production efficiency is low, which does not conform to the national clean energy policy. In order to shorten the vulcanization time of the bladder, it is necessary to increase the vulcanization temperature of the bladder. Fluidity, leading to lack of glue in vulcanized bladders, resulting in waste, so also not applicable

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