RETREADING RAISED TO PERFECTION
RINGTREAD, a complete cold retreading system
that guarantees a perfect end result.
NO DEFORMATION = LESS WEAR
Each ring is produced individually by means of a centripetal radial press. Therefore, vulcanisation takes place in the final configuration of the tread, allowing the molecular structure to stabilise in a stress-free configuration.
The strips are produced in long multi-stage presses, where it is difficult to precisely check temperature, pressure and vulcanisation times. The strip does not follow the convex shape of the casing: this deformation generates tension between the tread and the structure of the tyre, causing overheating.
UNIFORM TREAD = MORE KILOMETRES
The convex profile of the ring perfectly adapts to the curvature of the casing, preserving its integrity. Surface uniformity ensures maximum adhesion between the tread and the tyre structure as well as superior performance.
The application of a flat strip to the convex shape of the tyre structure causes deformation and weak points, which increase the tread wear rate and cause the casing to overheat, which could reduce the life of the tyre.
SPLICELESS = MAXIMUM RELIABILITY
RINGTREAD allows for perfectly balanced retreaded tyres. The fact that they are spliceless reduces rolling resistance and ensures slow and regular wear, thus significantly reducing mileage costs and the total price of owning the tyre.
Retreading using conventional flat strips necessarily involves the presence of at least one splice. In addition to inevitably throwing the tyre off balance, this creates a weak point that can increase the likelihood of the thread detaching itself.
Highly qualified operators, using sophisticated equipment especially developed by Marangoni, determine the characteristics of the casings and select the best ones.
Residues of the old tread are completely eliminated, leaving a surface on the casing featuring crests and grooves designed especially to improve adhesion of the ring.
Following additional inspection, any damage to the tyre is repaired specifically before applying the ring. Marangoni trains personnel continually on how to carry out these operations.
The Marangoni building machines place and automatically centre the ring on the casing, rolling it to maximise adhesion. The machinery used is extremely sophisticated and eliminates all possibility of human error.
The casings are handled in such a way as to prevent any contact with impurities and debris, using a made-to-measure monorail that, exploiting a double envelope system, ensures maximum adhesion of the new parts to the casing.
This guarantees a perfect seal between the ring and the casing, the last step in obtaining a high quality tyre.