Traditional tire vulcanization machine uses rubber bladder as the inner mold, its low thermal conductivity causes high energy consumption of tire vulcanization. And the low rigidity of rubber bladder causes low tire precision, uneven mass distribution, and thus affects tire dynamic balance performance. In this study, we propose a new vulcanization technology, a radially expandable steel internal mold is used to replace the capsule, and all molds are heated by electromagnetic induction instead of steam and pipelines. The energy consumption of new vulcanization process is reduced by 72% compared with original process, the tensile strength of tire sidewall compound is improved by 20%, and the dynamic balance performance of the tire is improved by 20%. What’s more, the new vulcanizing machine adopts two molds, which can work at the same time or separately, further reducing equipment cost and energy consumption.

Double-mold tire vulcanizing technology with electromagnetic induction heating and direct pressure shaping

ACS Spring Meeting 2021

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