Upon completion of the M-Lug tire building process, the tire goes to the Grooving department, where the tread is designed and cut into the rubber by a computer-controlled groover. Our groovers are fully automatic and controlled by a CNC computer, which can store up to 600 programs. They are designed for complete interface of the buffing-building and cutting procedures. This system ensures that your tires are retreaded to the precise radius, diameter, and tread-depth specifications dictated by your tread design.
In today’s OTR tire market, retreading has become the ultimate value in the tire industry. Given the high cost of new tires, customers are now depending on retreading for their new choice of replacement tires. For clients accustomed to retreading but looking for better quality or a broader selection of services, RDH offers state-of-the-art equipment, an experienced team, and unbeatable customer service. If you’re new to the retreading option, we’ll be happy to introduce you to the many benefits of this service which cuts costs by giving OTR tires new life – often many times over.
When it comes to ultra-high performance industrial tire retreading, precision is everything. That’s why we employ the state-of-the-art Marangoni, or M-Lug, system for retreading OTR tires. Tires produced using this system are de-treaded, buffed, built, and the tread designs grooved on air-inflated hubs. The M-Lug system was made to solve the problems inherent to traditional methods, and it achieves maximum adhesion between tread and casing, improved reliability, and an entirely uniform tread pattern.
The RDH Retreading Process
Our proprietary retreading process has been refined over three decades to deliver the ultimate in accuracy, durability, and performance. You will find that quality assurance is built into the process at every stage.
Tires are inspected thoroughly for punctures, cuts, and any type of separation. All repairs are marked, and the tire is then approved to continue to the next station. If the tire does not pass our standards for repairing and retreading, it is rejected and sent back to the dealer.
Tires are de-treaded and buffed to remove their old, worn tread design. Our computerized buffer is programmed to buff each tire to precise uniformity, constant radius, and under-tread thickness. Although our buffer has an electronic measurement system, our operator also uses a manual tape to ensure correct measurements.
The buffed surface is inspected for any hidden defects that would prevent the tire from being retreaded or repaired. An air tool is used to seek out any cuts or penetrations in the buffed surface. Damaged areas are removed, leaving a smooth texture without scorching the rubber surface. Any damaged wire filament is removed using an aluminum oxide grinding stone mounted in a high-speed drill.
The skived areas are filled with a unique rubber compound and trimmed flush with the casing. On repaired tires, the injuries are rebuilt to their original size and cut to match the construction of the tire.
Our repairs follow strict guidelines set by the OE Tire Manufacturers on repair limitations and by our suppliers. When cured by heat and pressure, these repairs provide the maximum adhesion available while still maintaining flexibility.
All our customized systems of retreading are cured in open steam chambers. The temperature, pressure, and time are precisely calculated for the size, type, and thickness of the casing and tread. This method of vulcanization minimizes the adverse effects of over-cure of the outer tread and does not create any stress or distortion within the tire casing. Various tread compounds are available for all our customized systems of retreading. We can provide a broad range of compounds to meet any job requirement.
In this computer-assisted process, the tire is grooved to create the desired tread design. These CNC programs are created based on tire size, tread depth, and tread design.
In this process, the tire is inspected, and any excess rubber is trimmed off and sealed to prepare it for the curing process.
After the tire passes through its last visual inspection, it is put into the chamber where it will cure for a predetermined amount of time, based on the amount of rubber added to the casing. Each of our chambers is controlled by a computerized program to ensure that each tire is cured properly.
When tires exit the curing chambers, all spot repairs need to be buffed and trimmed down to the contour of the tire. After this process is completed, the tire is then painted and sent to final inspection.
This is the last step in our Quality Control process, and it ensures that the tire has been inspected both inside and out for missed cuts, punctures, and any separation that could have occurred during the curing process. Retreads are inspected, and the tread depth is checked. After approval of these conditions, the tire is ready for shipment back to the customer.
Not sure how to choose the right tire retreading resource? Give us a call, and we’ll put your mind at ease.