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Tire bulge type Jan 31, 2019

Tire bulge type

1.Crown

The crown void is mainly characterized by the tread surface (referred to as the crown surface), that is, the tread top delamination.

The main reason is that the tire pressure is too large during the use of the tire, so that the tire landing area is reduced, the tire is worn early, and the tire temperature is increased due to rolling acceleration or tire heat dissipation during tire use. The adhesion between the layers is reduced, and the centrifugal force of the tread is increased to delaminate the top of the tire.

During the use of the heavy-duty tires, due to the overload of the car, the load of the single tire is increased, the deformation of the tire is also large, the cord is loosened by the excessive tensile stress, and the tread rubber and the ply are peeled off, causing the tread and the buffer layer to be disengaged. , or carcass stratification, large area empty!

During the driving process, due to the emergency braking, the steel ring and the tire remain unmoved under the condition of emergency braking. At this time, because the inertia car is still driving, the friction of the tread on the ground is intensified, and the tread and the carcass are in between. A shearing effect is produced, which tends to peel the crown surface from the carcass, resulting in a crown void.

During high-speed driving, especially in summer, the temperature inside the tire reaches 135 degrees, and the rubber and cord are greatly damaged, often causing delamination! At this time, do not use cold water to wet the tires to avoid causing an explosion!

2.Shoulder

The shoulder space is a kind of tire side bulge, which is divided into partial and integral. It is generally common between the tire tread and the sidewall. The main performance is the obvious bulging phenomenon, similar to the bubble! Some are ring shapes, this is a whole void! The sidewall and the carcass are clearly separated!

The main reason: due to the lack of dryness of the cord during the tire manufacturing process, the glue is stuck, or the moisture content of the gel itself is too high! This reason is a quality issue!

In the case of overloaded tires, the contact surface area of the tires is increased, the shoulder wear is accelerated, and the temperature of the carcass is high. The heat collection cannot be dissipated in time, forming the shoulder heat collection, causing the void! Some are due to the accumulation of heat in the carcass, causing the rubber and shoulder rubber in the carcass layer to deteriorate due to pyrolysis, losing part of the physical and mechanical properties, and the adhesion of the glue to the ply is drastically reduced. Causing a void

3.Empty mouth

Mainly refers to heavy duty radial tires. Mainly shows the void around the steel ring.

Due to problems in the closing of the wire at the nozzle, the wire loop is cracked and delaminated. The rubber of the bead ring portion of the sub-port portion is degraded due to high temperature or the configuration of the colloid itself. During the use, the modified rim is installed, the deformation of the tire during the driving process is irregular, and the friction causes the bead to generate high temperature to cause delamination; the rim is too large or too small (such as the rim thickness problem) to cause uneven force. The flexing point drops and delaminates; the temperature of the brake drum (brake basin) is too high, which may cause the high temperature aging of the inner tire's sub-port, causing it to be emptied!

4.Curtain drum kit

Mainly refers to the speed of the car radial tire when passing through the ditch, ridge or road foreign matter, causing the steel ring and the ground to squeeze the side of the tire, causing the side curtain wire to break and causing the partial position of the sidewall.