The main reasons for tire bulges are as follows:

1. Crown voids

The crown voids are mainly represented by the tire pattern surface (called the crown surface), which is the top of the tread. delamination. The main reason is that the tire pressure is too high during tire use, which reduces the tire's ground area and causes early wear of the tire. During tire use, due to rolling acceleration or poor tire heat dissipation, the tread temperature increases. The adhesion between the thread layers decreases, and the centrifugal force of the tread increases, causing the top of the tire to delaminate. During the use of truck tires, due to overloading of the car, the load on the single tire increases and the tire deforms greatly. The cords are loosened due to excessive tensile stress, and the tread rubber and ply layer peel off, causing the tread and buffer layer to detach. , or the carcass is delaminated and hollowed out in a large area. When the car is driving, due to emergency braking, the steel rims and tires remain motionless. At this time, due to the inertia of the car, the friction between the tread and the ground intensifies. At this time, the friction between the tread and the carcass increases. A shearing effect is produced, which easily separates the crown surface from the carcass, causing crown voids.

2. Shoulder void

Shoulder void is a kind of bulge on the side of the tire. It is divided into two types: partial and whole. It is generally more common between the tire tread and the sidewall. The main manifestation is that there is an obvious bulging phenomenon, which is similar to a bubble! Some are in the shape of a ring, which is the overall hollowing! The sidewall and the carcass are obviously separated.

The main reason: During the tire manufacturing process, the cords are not dried enough before they are glued, or the colloid itself contains too much moisture, which is a quality problem.

When the load-carrying series tires are overloaded, the tire surface contact area with the ground increases, tire shoulder wear accelerates, the tire body temperature is high, and the generated heat cannot be dissipated in time, forming shoulder heat accumulation, causing voiding !Sometimes it is because the carcass generates heat, causing the rubber in the carcass line layer and the shoulder rubber to deteriorate due to high temperature decomposition, losing some physical and mechanical properties, causing the adhesion between the rubber and the ply to drop sharply, causing voiding. .

3. Zikuangkong

Mainly refers to load-carrying radial tires. Mainly manifests as voiding around the steel ring. Due to problems when closing the sub-mouth steel wire, the wire ring was cracked and delaminated. The colloid at the mouth of the wire ring causes rubber aging and delamination due to high temperature or problems with the configuration of the colloid itself. During use, due to the installation of modified rims, the tire deforms irregularly during driving, and friction causes the bead to generate high temperatures, causing delamination; the rim is too large or too small (such as rim thickness issues), resulting in uneven stress. The flexion point decreases and delaminates; the temperature of the brake drum (brake basin) is too high, which can easily cause the inner tire's mouth to age at high temperatures, causing it to become hollow.

4. Curtain bulging

Mainly refers to the car radial tire traveling too fast when passing through ditches, ridges or foreign objects on the road, causing the steel ring and the ground to squeeze the side of the tire, causing the side cord to break. There is a local bulge on the sidewall.

Handling precautions:

First, when installing tires, please go to a professional tire shop and use professional tire installation equipment and professional installation procedures.

Second, try to avoid driving in bad road conditions for a long time. If it cannot be avoided, please pay attention to driving as slowly as possible.

Third, develop good tire maintenance habits and check the tires frequently. You should carefully check the tire surface for potential hazards such as cracks, scratches, bulges, excessive tread wear, etc., and make adjustments and preventive measures at any time. Flat tire.

Fourth, in addition to checking tires regularly, car owners also need to make a habit of checking and maintaining normal tire pressure, pay attention to the tire warranty period, and ensure that "healthy" tires are used to drive the vehicle.