There are many kinds of car tires nowadays, the most widely used is pneumatic tires. In fact, there are many kinds of tires besides pneumatic tires. Solid tires are one of them. Perhaps people rarely see solid tires, but in fact they are all around us. Today, I will take you to know solid tires.

Introduction to solid tires

Solid tires are industrial tires suitable for low-speed and high-load running vehicles. In addition to the characteristics of pneumatic tires, they also have small starting resistance, simple structure, convenient use and maintenance, small maintenance workload, no need for inflation, and no Hidden dangers of air leaks and flat tires. Therefore, the safety, durability, puncture resistance, tear resistance, and economy of solid tires are better.

Application of solid tires

Solid tires are mainly used for low-speed and high-load hoisting vehicles, towing vehicles and flatbed trucks and other industrial vehicles, such as various forklifts, port and airport trailers, etc., and are also widely used in industrial and mining, docks, iron and steel metallurgy, airports, Military, construction machinery and other fields are also widely used in medicine, food, papermaking, textile, electronics and other fields.

Classification of solid tires

1. Pneumatic tire rim solid tire

A solid tire mounted on the rim of a pneumatic tire.

2. Steel rim press-fit solid tire

A tire that is vulcanized on an endless metal belt and then press-fitted on a matching wheel.

3. Bonded solid tire

Tires vulcanized directly on driving wheels.

4. Non-marking solid tire (environmental friendly tire)

Solid tires that will not leave marks on the ground during use, especially brake marks.

Advantages and disadvantages of solid tires

Advantages: The biggest advantage of solid tires is that they are wear-resistant. There is no need to worry about tire pressure and air leakage. They are not afraid of tying, bad tyres, and small needles and small nails. Another point is that solid tires can carry more than the load of pneumatic tires. Finally, in terms of the aging speed of rubber, solid tires are definitely longer than radial tires, which can meet the long-term use needs of vehicles working in harsh environments. The service life is generally relatively long, usually 3 to 5 years, without pumping up, saving a lot of after-sales troubles.

Disadvantages: poor ability to adapt to the road surface, uneven road surface, poor shock absorption ability, heavier tires increase the weight of the vehicle.

Reasons why solid tires are rare

The big guys are talking about checking tires regularly, tire pressure, tire temperature, air leaks, etc., and try to avoid tire punctures. Then someone asked: Don’t worry about it if you make it directly into a solid core? But why did radial tires replace solid tires? The previous rubber tires were indeed solid, but they were uncomfortable in use. Moreover, as the saying goes, shoes weigh one catty and a person weighs five catties. The same is true for tires. Solid tires are definitely heavier than current radial tires, which will cost more. oil.

　　 Then the solid tires are not comfortable enough, the turbulence in driving is more intense, and the cost is higher. The second is that the solid tire is unstable. When the tire is running at high speed, it is too late to recover from deformation, which may cause a standing wave on the carcass, which will cause the tire's temperature to rise sharply and cause a puncture. This phenomenon is more likely to occur with solid tires. There have been cases of tire chipping when using solid tires in the test. In addition, solid tires increase the unsprung mass. The greater the mass of the suspension, the slower the suspension system responds to changes in the road surface, which has a great impact on the dynamic performance of the vehicle. Therefore, solid tires are mainly used in industrial vehicles such as forklifts.

Common quality problems of solid tires

1. Delamination: Circumferential cracks or delamination occur between rubbers, and there are more inflatable types.

the reason:

(1) The rubber material contains moisture and sundries, especially the viscose is contaminated by rain and sundries during storage and transportation.

(2) Insufficient sulfur caused by poor heat preservation of the tire embryo and temperature fluctuation of the vulcanizer.

(3) The fetus is formed too early and the parking time is too long, which will cause self-sulfurization of the rubber in the center of the fetus.

(4) Overload and overspeed operation during use.

2. Break off the ring

the reason:

(1) The viscosity of the adhesive does not meet the process requirements.

(2) The surface is contaminated after applying adhesive.

(3) Insufficient sulphur caused by poor heat preservation of the tire embryo and temperature fluctuation of the curing press.

(4) Overload and overspeed operation during use.

3. Blocking: the rubber surface is partially lumped off

the reason:

(1) The mold is not opened in time after the vulcanization time is up, resulting in excessive sulfur and aging.

(2) The compound is not uniformly mixed and heated.

(3) Insufficient sulphur caused by poor heat preservation of the tire embryo and temperature fluctuation of the vulcanizer.

(4) The use environment is poor and was cut by external force.

(5) The use environment is corroded by chemicals.

4. Radial cracks: rubber cracks along the diameter direction, mostly in the white press-fit type

the reason:

(1) The rubber material has insufficient tearing strength and aging resistance.

(2) Failure to open the mold in time after the vulcanization time expires, resulting in excessive sulfur and aging.

(3) Overload.

5. Discoloration: The color of non-marking tires changes, mostly in white inflatable tires.

the reason:

(1) The overall discoloration is mainly because the white rubber material itself contains chemical components that discolor after oxidation.

(2) The discoloration in the middle of the sidewall is mainly caused by the wrong use of fetal core rubber, or the use of polluting anti-aging agents during mixing.

6. Broken edge: simple tire convex edge fracture

the reason:

(1) The root of the flange is inherently damaged during production.

(2) The strength and hardness of the rubber at the convex edge are insufficient.

(3) Improper operation when installing the rim.

7. Slip: the tire diameter is too large or the rim diameter is too small, resulting in relative displacement between the tire and the rim.

8. Desoldering: Press-fit solid tire steel ring welds are unsoldered, and the inflatable solid tire steel ring joint is broken.

the reason:

(1) The joint welding strength is not enough or there is false welding.

(2) The rim and the tire are not placed evenly during installation.

(3) Arrangement of inflatable steel ring is misaligned.

　　 9. Intermediate cracks: cracks occur from the clamping seam after use, mostly in small sizes.

　　 10. Partial wear: The left and right sides of the running surface wear are inconsistent after use.

the reason:

(1) The flange hardness of the simple tire is not enough.

(2) The internal part of the reinforcement ring is broken.

(3) There is a problem with the axle.

　　Why use solid tires for construction vehicles

1. Excellent safe use performance is conducive to improving work efficiency

Because the solid tire carcass is made of all rubber, the puncture resistance of the tire is guaranteed to the greatest extent, and the hidden danger of tire puncture during the load-bearing operation of industrial vehicles and in the harsh working environment is fundamentally eliminated. The load-deformation of solid tires is small, and the running stability is good. Because of its puncture resistance and tear resistance, it does not need to be inflated. It avoids the heavy labor of frequent tire replacement and can improve the utilization rate and work efficiency of the vehicle. It can run at low speed and efficiently. In vehicles, solid tires can completely replace pneumatic tires.

　　2. Reasonable structural design to ensure that the tire has better performance

The solid tire adopts an advanced three-stage structure design, and the three rubber materials respectively ensure the overall performance of the tire. High-rigidity, high-strength base rubber and steel ring support not only ensure the stiffness of the tire, but also ensure the tightness of the tire and the rim, and fundamentally eliminate the slip ring problem of solid tires; the high-elastic intermediate rubber effectively It absorbs the vibration generated when the vehicle is running, and has a comfortable driving performance, while avoiding damage to the vehicle; the thickened tread rubber layer ensures the tire's resistance to tearing and abrasion, and improves the service life of the solid tire;

　　3. Advanced technology and formula design

The production of solid tires has advanced technology with more than half a century of production history and experience. The rubber formula design has maximized the performance of the tires. In particular, the base rubber is all imported high-rigidity and low-heat-generating rubber materials. The heat generation and temperature rise during operation are minimized, and at the same time the heat resistance of the tire is improved, thereby solving the serious problems of solid tires such as swelling, slippage, and bursting caused by temperature rise;

The advanced formula design reduces the rolling resistance of the tire. Tested by the National Construction Machinery Quality Supervision and Inspection Center, the coefficient of rolling resistance of solid tires is equivalent to that of pneumatic tires, which solves the problem of increased fuel consumption caused by changing to solid tires;

　4. Avoid the danger of uncontrolled vehicle tire burst

Pneumatic tires rim-type solid tires are solid tires that can be used interchangeably with pneumatic tires of the same specification. When the vehicle is driving at high speed, such as the tire hitting potholes and other obstacles, the tire will be severely squeezed and deformed between the obstacle and the rim flange, which can cause the carcass cord to break, and the compressed air inside the tire will break. The line is pushed up to form a bulge.

If it is more serious, it will cause the tire to crash, and it will be completely flattened instantly and the vehicle may lose control. Compared with pneumatic tires, it has the advantages of high safety, puncture resistance, tear resistance, wear resistance and long life. It is an ideal replacement product for pneumatic tires in the field of industrial vehicles. With the development of industrial vehicles and the improvement of solid tire production technology, this type of tire has been more and more widely used.

Precautions for installing solid tires

The following editor talks about the installation precautions of solid tires. Pneumatic tire rim solid tire and the corresponding pneumatic tire rim can be used interchangeably. However, the loading and unloading of solid tires and rims needs to be completed on the press with auxiliary tools (tooling). To ensure the safety and accuracy of the installation process, the following rules should be followed:

1. First, check the adaptability of the tire and the rim, that is, whether the size of the tire to be installed is the same as that of the rim. The width of the rim used by the tires of the same specification is different, so you must first confirm it when installing. The inspection of the rim includes whether the rim has defects and whether there are burrs. If there are burrs, polish them first, otherwise they may damage the inside of the tire hub and affect installation and use.

2. In order to ensure that the tire can be installed in place smoothly and reduce the friction with the rim, during installation, the inner surface of the tire hub and the outer surface of the rim need to be sprayed or coated with lubricant. The lubricant can be commonly used soapy water, washing powder water, etc. If possible, special lubricants for tires can be used, but oils and other common industrial lubricants must not be used, because they will swell rubber and damage the tires.

　　3. When the tire is placed on the rim, the head should be flat and should not be skewed. Otherwise, it will be difficult to install, and it will swing from side to side when using it.

　　4. According to ETRTOEDI standard requirements, tires must be concentric when they are installed on the car. Tyres of different specifications and different wear and tear should not be installed on the same vehicle or on the same axle, and should not be mixed with pneumatic tyres, otherwise it may easily cause personal and equipment accidents.