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Tires
Retreading
What is it?
Our retreading process combines craftsmanship and technology.
Carloni offers a whole catalogue of retreadable sizes thanks to a wide assortment of moulds.
A used tire has already completed its first life cycle and its condition can be the most
disparate. Therefore Carloni operators receive specific and continuous formation, in order to
better analyze each casing and assess its suitability for retreading.
TYPES OF RETREADING
There are two retreading processes: hot retreading (in mould or autoclave) and cold retreading (with premoulded bands). In Carloni truck tyres can be retreaded using both methods, while OTR tires are retreaded through hot curing.
Earthmover vehicles
TRUCKS & Busses
Why retreading?
By retreading you can give a second life to the tire by reapplying a new tread on it, in order to use the tire for many more kilometers (running time), usually about 70/80% of those already achieved in its first life.
A NEW LIFE
A TIRE'S VALUE LIES IN ITS STRUCTURE, THE CASING: IT CONSISTS OF RARE AND VALUABLE RAW MATERIALS SUCH AS STEEL, NATURAL AND SYNTHETIC RUBBER, WHICH ARE RARE, VALUABLE AND ALSO DIFFICULT TO DISPOSE OF.
Advantages
- PRODUCT SAFETY
- COSTS FOR THE END USER
- ENVIRONMENTAL PROTECTION
Retreaded tires safety has been studied by the National Highway Traffic Safety Administration (NHTSA), the American Trucking Associations and the U.S. States of Arizona and Virginia. Results were in favor of the use of retreaded tires: experts confirm that a well-mantained retreaded tire provides equivalent reliability and durability to a well-mantained new tire. Even twice-retreading a high-quality tire can keep it on the road up to 500% longer than buying a cheap tire in the first place.
It has been proven that every time a company retreads a well-manufactured and serviced tire, it saves more than 50% of costs compared to buying a new high-quality tire.
The results show also that a retreaded tire provides about a 96% reduction in natural rubber consumption and it eliminates the use of additional steel and polyester.
SOURCE: Retread Tires in US Canada Report by Duke University, East Carolina University, North Carolina State University, University of Michigan Emeritus (July 2018)
HOT RETREADING
THE PROCESS
01
INSPECTION
Each casing is examined both internally and externally in order to detect the presence of any defects;
the margin of error is minimal thanks to the experience of our operators and the great number of quality and safety controls performed by high-tech machinery.
02
Buffing
Any residual tread is removed from the casing with a Tire Buffing Machine. This process gives a textured surface to the tire casing and aids the adhesion with the new tread later applied on its surface.
03
PREPARATION
Any damage that the carcass may have suffered during buffing is detected and repaired: oles in the casing are filled with compound and patched to rebuild the casing’s integral strength. A chemical solution is applied on the casing, that allows the new tread to adhere to the casing structure.
04
BUILDING
Different rubber compounds are applied on the carcass casing, using numerical control machines to ensure that the correct amount of rubber is applied and that the tyre is built to the exact specified dimensions required for its new pattern. The choice of materials to apply depends on the application of the tire and is the result of years of experience in suppliers selection.
05
VULCANISATION
The casing is vulcanized into special molds, at appropriate temperature and
pressione, per ottenere il disegno del battistrada voluto, tramite appositi stampi.
06
FINAL INSPECTION CHECK
This final examination is performed to check that the finished tire meets all technical and aesthetic specifications according to our quality standards.
COLD RETREADING
The cold retreading process differs from the hot retreading one for the phases 4) and 5). After buffing and repairing, a procured band is applied on the casing, secured to the casing using a special uncured cushion gum. Thanks to an autoclave vulcanization process at a temperature of 95°-115°, the newly-applied band becomes a single body with the tire casing and a whole new life cycle for tires begins!
