Best understanding of tire retreading and retreadi

2022-08-21
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Understand tire retreading and retreading process

why retreading tires

has excellent value

perhaps, you are a car lover with a private car, and you are considering how to make your family finance do more with less money; Or, you are a team manager who buys thousands of tires from you every year, but no matter what kind of person you are, in today's economic era, your first consideration must be how to control costs. Truck drivers, airlines, construction companies, farmers and car owners all buy retreaded tires based on the simplest reason for people to pass, which is to save money

the cost of producing a retreaded tire is lower than that of producing a new tire, so the price is also cheaper, usually 30 ~ 50% cheaper than the same new tire. By using retreaded tires, the aviation industry (including military and civil) can save us $80million per year. The retreading and utilization of automobile tires saves the automobile transportation industry more than 2 billion dollars every year, so tire retreading is a very effective way to reduce your tire cost

why is tyre retreading so valuable

when manufacturing a new tire, most of its manufacturing cost is on the carcass. Tread - the part of the tire that touches the ground - accounts for only a small part of the cost of a new tire. When the pattern of a tire has been ground flat and seems to be scrapped, most of the value of the tire still exists and needs to be restored. In fact, the service life of this tire is just beginning

are retreaded tires safe

retreaded tires are as safe and durable as new tires of the same type

retreaded tires must be safe

the president of the United States signed an executive order in 1933, requiring all vehicles of federal government agencies to use retreaded tires when changing tires, and all civil aircraft and military jets to use retreaded tires. In fact, 80% of all tires used on aircraft in service in the United States are retreaded tires. In 1933, only Boeing 727 aircraft used 28000 retreaded tires, and the service life of each tire tread reached an average of 200 takeoff and landing

in Airlines, each tire can be retreaded 6 times on average, and some tires can be retreaded as many as 12 times

facts have proved that retreaded tires are as safe and durable as new tires of the same type

professional tire retreading factories always implement strict industry standards in every step of the tire retreading process. The tire strength test initiated by the American tire retreader Association clearly shows that the strength of the carcass of a flat tire is almost the same as that of a new tire of the same type. Retreaded tires for various purposes, from passenger car tires to large engineering tires, are used the same as new tires of the same type. When making plans to buy new tires, many transportation fleets intend to buy some retreaded tires for two or more times, which has become a convention in their tire budget. Retreaded tires are also very safe to use in daily life, such as school buses, fire engines, ambulances, emergency repair patrol cars and thousands of private car owners

to save energy and protect the environment, please use retreaded tires

retreaded tires can save oil energy. The synthetic rubber component in a new tire contains 7 ~ 8 gallons of oil, and retreading a tire of the same type only requires synthetic rubber equivalent to 2 ~ 3 gallons of oil; It takes 22 gallons of oil to produce a medium-sized truck tire, while it only takes 7 gallons of oil to refurbish this tire

tire retreading saves oil

tires are basically petrochemical products, and it takes 22 gallons of oil to produce a new truck tire. Most of the oil has been included in the carcass used in tire refurbishment, so it only needs 7 gallons of oil to refurbish this tire. A fleet that uses about 100 tires a year can save 1500 gallons of oil, while greatly reducing the amount of carcasses that eventually accumulate in the dump

every retreaded tire is a recycled environmentally friendly tire

in North America, taking 1993 as an example, the use of retreaded tires saved more than 400 million gallons of oil, and the service life of more than 30 million tires was extended instead of being thrown into the dump or garbage station of waste tires

tire retreading industry

what is tire retreading

describe it in a simple sentence: tire retreading is the process of selecting and testing tires with flat tread (i.e. carcass) and then adding new tread

in the process of tire retreading, the detection of the carcass must be particularly thorough and careful, and then the tread with the ground pattern should be polished off, and then a new tread rubber should be pasted on the carcass - this step is very similar to the production of new tires. There are many different retreading processes, but the ultimate goal is the same, that is, through a certain temperature, time and pressure, the tread rubber is firmly adhered to the carcass

tire retreading is a relatively mature industry. Since its birth in the early 20th century, the industry has been developing steadily. So far, there are about 1400 tire retreading plants in North America. The scale of these tire retreading plants is large, small and diverse. Small factories retread more than 20 car tires or truck tires every day, and large factories can produce 2600 or more retreaded tires every day. In addition, some retreaded tire factories only retreaded some special tires, such as the engineering tires of agricultural machinery and civil engineering machinery. All these factories can retread more than 30 million tires every year, consume 560 million pounds of synthetic rubber and natural rubber, and have sales of more than 2 billion dollars per year

long distance bus transportation companies are the main market for retreading tires

if the tires cannot be retreaded and used, their interests will be seriously affected. The retreadability of radial truck tires is the commitment of new tire manufacturers (for example, some large-scale new tire manufacturers now guarantee that steel radial tires can be retreaded more than twice). Motor transport companies refurbished more than 15.4 million tires in 1993, accounting for 40% of the new tires they bought

retreaded tires can be used in passenger cars, aircraft, gravel transport trucks, container trucks, agricultural motor vehicles and civil engineering vehicles. The fastest-growing aspect of the retreading tire industry is the retreading of light truck tires. In North America and internationally, the market potential of tire retreading is also growing

retreading process

tire retreading industry includes the following steps:

preliminary inspection

grinding

carcass preparation/repair

tread treatment

vulcanization

final inspection

preliminary inspection: a high-quality retreading tire must have a good foundation, and the preliminary inspection will determine whether a flattened old carcass can be used for retreading. This preliminary inspection is perhaps the most important step in the retreading process. Through this step, it can be determined whether the carcass has defects produced in the production process of new tires, irreparable losses and excessive aging. In short, the carcass that cannot be used after renovation cannot be directly collected

when you decide to receive a carcass for retreading, you have decided to put your company name on your final product. Preliminary inspection is the basis of the success of the whole tire retreading work

grinding: the tread with flat pattern is ground from the carcass by grinding. The correct operation of the grinding process is very important for the subsequent process of tire retreading process. When grinding, put the carcass into the grinding machine (a machine like a lathe), and then inflate the carcass. Then, while the carcass is rotating, grind the machine head to cut off the ground tread rubber layer, and grind the carcass surface to the specified shape, size and grain, so as to fit the new tread

each type of tire has a specified tread width, profile and camber. The carcass must be polished to the specified shape so that there is an optimal contact surface between the carcass and the ground. In tire retreading plants, part of the professional skills of professional technicians is that they can skillfully and freely grind the carcass to the specified size (a polished carcass is often more accurate and rounded than the original carcass size)

carcass preparation and carcass repair: the damage left on the polished carcass can be repaired as long as it is within the allowable range. Repair professionals are well-trained. They know which damage can be repaired and which cannot be repaired. If the damaged part is too large, the tire cannot be retreaded. In the tire retreading process, the repair process is a crucial step. If the structure of the repaired part is not strong enough, the correct repair work must be to make the structure of the repaired part at least as strong as the original structure. Operators of carcass repair must be professional technicians. He should be well aware of what he has to do to the end users and the people who use recycled tires

tread fitting: after all repair work is completed, the polished carcass is ready to be pasted with a new tread, so that there are two vulcanization processes for the combination of tread and carcass: mold vulcanization and pre vulcanization. These two processes can provide high-quality products, but either method requires technicians with a certain degree of professional knowledge

mold vulcanization process: in the tire retreading process of mold vulcanization, the bonding method of tread rubber is very similar to the bonding method of producing Xintai tread rubber, Among many methods, one of the most common methods is to stick the unvulcanized tread rubber on the crown of the polished carcass (if it is required to completely renovate from the spout to the spout, some rubber should also be stuck on the sidewall). When the unvulcanized rubber is pasted according to the specified size, these prepared tires can be put into the mold for vulcanization

pre vulcanization process: as can be seen from the name of this process, the tread rubber used here is pre vulcanized by the tread rubber manufacturer through the mold in advance. The tire retreading factory selects the tread rubber with different patterns, widths and thicknesses, such as belt or ring, according to the needs, and sticks it to the prepared carcass. The effect after sticking must be linear and flat without wrinkles, Then put the prepared tire into the vulcanization tank for vulcanization

vulcanization: vulcanization is a process that closely combines the new tread compound with the prepared carcass from January 7 to 8, 2017. During the vulcanization process, the unvulcanized rubber gradually changes from a soft, sticky, stretchable material to a tough, durable tread with good driving and ground grip

in the process of vulcanizing the standard tensile specimen with the impact tester at the speed specified in gb/t228 (2) 002, when the unvulcanized rubber is bonded according to the specified size, the prepared carcass to be vulcanized is placed in the mold. When the mold is closed, the carcass is inflated to an appropriate pressure, and the expanded carcass presses the unvulcanized rubber on the mold to form a tread pattern, Then after a certain period of heating to achieve vulcanization

in the pre vulcanization process, the vulcanization work is achieved through the pressure generated by electricity, steam or high-temperature liquids such as oil in the vulcanization tank. The prepared carcass is put into place after being pasted with new tread rubber

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