How to coat the tires
Tire coating factories first collect flat and unused tires from the city. This process may take place in the form of cooperation between the apparatuses and the factory. In terms of wear, collection tires are divided into 3 categories of completely uniform wear, one-way wear, and irregular wear. Obviously, the more regular the tire treads are, the easier it will be to cover them. In this process, the overall structure of the tire and the Lasitic reinforcing wires remain intact, and the outer parts of the tire are coated and reconstructed. The production date of the tire and the health of the original tire texture, the inner parts and the reinforcing wires of the tire are important factors in performing the coating process. They are rubber. The coating process is done in special molds under 100 kg pressure and 160 degrees Celsius temperature and takes from one hour to one and a quarter hours depending on the thickness of the tire. The tire coating is made in such a way that it is difficult to distinguish a new tire from an old one.
In the tire coating process, the tire is first checked for health, any dents, punctures, punctures, peeling, etc. At this stage, unusable tires are filtered and removed from the production cycle. Then the remaining treads of the tire are smoothed with a special machine or sandpaper and are completely removed. In the next step, according to the application of the rubber, the desired cover is molded in different types of flowers, and then it is covered with two methods, hot or cold, with grafting. Coating is done on the bottom surface of the tire. In the technical stages, the tires are first inflated and the old treads are removed at high speed. These machines precisely remove the old tire tread and prepare the surface for the new tread. In the next step, the rubber cover should stick to the surface of the tire using pressure and heat. The tread mold, which is molded with the new tread pattern, is heated and a thin layer of special adhesive is spread between the tire and the tread. Then the tire is placed in a place called the baking chamber, which heats up and completes the coating process. After that, the glue must be dried so that the tire is ready to go under the car. In the last step, the tire must be inspected. The produced rubber is subjected to another practical and theoretical inspection and passes the industrial standards before it leaves the factory and enters the market.
The use of coated tires
In the 1960s, retreaded tires were the most economical solution for consumers due to limited technology. In the first half of the 20th century, most tires were produced in the form of tubes and sheets, which were often damaged during road use. When B.F. Goodrich patented tubeless tires, revolutionizing tire manufacturing technology. While these advances in tire technology mean that retreading is not common in passenger cars, retreading for agricultural and commercial use is still a common practice in the industry. They work at low speed, they are made. Farm implements, tractor trailers, dump trucks, warehouse vehicles, and any machinery that is not engaged at high speeds can use retreaded rubber. Due to the fact that the tire cover is attached to the old tire like a layer, it cannot withstand the pressure of weight at high speed. These types of tires are cheaper than new tires, and for people who have a small budget for buying tires, retreaded tires can replace worn tires without incurring a large cost. The price of coated tires is half or a third of the price of new and first-hand tires. Basically, they use coated tires for short distances and within the city. Due to the unreliable safety of coated rubber, they cannot be used in passenger cars; Except in cars that only work in an environment that does not require high speed driving.
