Tyre manufacturing process


Have you ever wondered how Bridgestone tyres are made? Each tyre undergoes an extensive process beginning with raw materials and ending with a final inspection. This ensures that each tyre is made with the same attention to quality that our company is reputed for.

1. Mistura de materiais
Mixing of MaterialsVarious grades of natural and synthetic rubber are combined with carbon black, sulphur and chemical products in an internal mixer to meet specific compound requirements. The resulting blend is called the "master batch", which is formed into rubber sheets, and cooled. Some rubber is used for additional processing while the majority is prepared for the extruding stage.

2. Estiramento
Weaving the pliesHeat is applied to the rubber to make it more elastic and then it is put through extruders machines where the tread and sidewalls, which require two different rubber compounds, are formed into the required shapes. The extruders produce a continuous sheet of tread rubber, which is then cooled and cut to specific tyre lengths.

3. Entrelaçar dos fios
Preparing the bead coreSpinning cords such as rayon, nylon, steel and polyester undergo a process called “calendering”, where they are woven into sheets and coated with rubber on both sides.
Once this is finished, the sheets are then cut at the proper angle into specific widths and lengths and eventually used for casing and cap plies, while steel cords are used for the belts.

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