Tire retreading process


Carried out by the retreading plant’s Initial Inspection Department, which analyzes the casing and decides whether retreading is a viable option.


Performed by the retreading plant’s Buffing Department to ensure that the tire profile meets specifications with respect to texture and radius. Buffing involves removing any remaining rubber from the crown of the tread surface and is carried out by qualified and experienced staff using automatic or semi-automatic buffing machines.


Removal of any damage found during the buffing process. Damaged areas are analyzed, and a determination is made as to whether or not the casing requires some type of repair. Following the removal of any damage found, the casing is thoroughly cleaned before proceeding to the next step.


Areas of the casing that were damaged are repaired using appropriate patches or reinforcement materials designed specifically for nature and type of the injury


Process of filling all injuries with rubber filler using a hand extruder under specific pressure and temperature conditions. Injuries are filled in such a manner as to avoid leaving imperfections that could ultimately affect the functionality of the tire.


Once all injuries have been repaired, cement is applied to the buffed casing in preparation for the application of the new tread.


An appropriate PRE-Q tread pattern is selected based on customer requirements and the type of service in which the tire is used. The tread is cut according to the perimeter dimensions of the tire and a layer of cushion gum is applied to either the casing or the tread, depending on the retreading system used.


The tread is then placed over the crown of the tire casing and is stitched to the casing using high-tech building machines.


Following tread application, build tires are prepared for curing based on the type of system to be used: rimless tires are fitted with an inner and an outer envelope, and rimmed tires (with rim and inner tube) are fitted with an envelope and protector for the vulcanization process using the GALGO PRE-Q system.

10    CURING

Under specific temperature, pressure, and time conditions, vulcanization of the GALGO PRE-Q treads is achieved through the curing process using autoclaves with hot air, indirect steam, electrical resistance, and/or thermal fluids.


Follow the curing process, the tire is examined to ensure that all repairs are properly installed and that the tire has been properly cured. This process is critical to ensure that tires meet the strictest standards for tire structure, application of tread, cushion gum and patches, and overall appearance. Once the tires pass final inspection, they move on to the final finishing stage.