TYRE RETREADING PROCESS PDF

Sign up today How a retread is made Retreading is the generic term for tyre reconditioning which extends the useful life of a worn tyre for its original purpose by the addition of new material. In the majority of cases the tread rubber is the only part of a tyre to wear away. The structure of the tyre remains intact. As the tyre construction has been produced to be capable of more than one life, to use this potential by replacing the worn tread makes sound environmental and economic sense.

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Europe[ edit ] In Europe all retreads, by law, must be manufactured according to EC Regulation car tires or commercial vehicle tires. As part of this regulation all tires must be tested according to the same load and speed criteria as those undergone by new tires. The Land Fill Directive of banned tires in landfills in , and banned shredded tires in The NHTSA is continuing research to determine the proportion of tire debris from retreads in comparison to new tires. Additionally, the NHTSA is researching the cause of tire failure and the crash safety problem posed by tire failures.

Environmental Impact[ edit ] Retread tires in service lower the volume of raw materials required for the manufacturing of a new tire. This includes a pronounced reduction in the use of oil. This also means significant reductions in greenhouse gas emissions.

In addition to reducing the amount of raw materials extracted, retread tires also minimize the amount of waste that ends up in landfills. To understand this figure, it is equivalent to lining up passenger tires tread to tread from roughly Los Angeles to San Diego or Philadelphia to Washington DC. Because a retread tire prevents the need for manufacturing a new tire, significant environmental benefits are achieved.

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Process Monorail Initial Inspection The initial inspection is done to evaluate the casing. The first and important step in the process of retreading is the detailed inspection of casing. This step guarantees that the casing is intact and in good condition. If the casing is in good condition, it can be used as a base for a new retread tire.

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The Process of Retreading

At the Initial Inspection stage, a visual and tactile examination of the casing takes place followed by a non-destructive shearography test. This test detects any inherent separations within the casing which are impossible to detect with the naked eye. The granular residue produced during the Buffing process is extracted using high-powered fans and collected in large hoppers ready for recycling. Preparation Firstly the buffed casing undergoes a further visual inspection with an experienced eye.

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Tyre Retreading Machinery

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