CN114987121A

CN114987121A - Tire repair method

Info

Publication number: CN114987121A
Application number: CN202210402835.4A
Authority: CN
Inventors: 谭双有
Original assignee: Henan Tanshuangyou Automobile Maintenance Services Co ltd
Current assignee: Henan Tanshuangyou Automobile Maintenance Services Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-09-02

Abstract

The invention provides a tire repairing method, which relates to the technical field of tire repair, and at least comprises the steps of (I) judging a damage type, (II) measuring an internal damage size, (III) calculating a damage difference value, and (IV) determining a tire repair type and repairing a tire, wherein the specific tire repair types corresponding to different damages of the tire are standardized by providing the damage type, the internal damage size and the damage difference value, so that the problems of secondary damage of a steel cord and a curtain cloth, easy glue failure of a rubber sheet after tire repair and the like caused by the adoption of a traditional tire repairing mode in the tire repairing process can be effectively avoided, the safety grade of the repaired tire can be effectively improved, the tire repairing effect is obvious, the vehicle running safety is ensured, a tire repairing standard is provided for the tire repairing industry, and the industrial progress is promoted; the invention is suitable for repairing the tyres of cars, off-road vehicles, electric vehicle, medium passenger vehicles, motorcycles and the like which are damaged in the using process.

Description

Tire repair method

Technical Field

The invention relates to the technical field of tire repair, in particular to a tire repair method.

Background

The tire is the only spare part that supports vehicle contact ground, and steel cord, the cord fabric of tire inner wall are the only skeleton texture that supports vehicle contact ground, and improper use can increase the risk of blowing out. Whether the steel cord and the cord fabric are broken or not is important in the automobile driving safety.

At present, the tire repair market generally adopts whole stopper stalk cooperation film, mushroom nail etc. to carry out the tire repair, and traditional tire repair mode is at the in-process of in-service use, if misuse can be suitable for the contrary, increases the risk of blowing out.

The existing integral stem stopper is matched with a rubber sheet or a mushroom nail, and the principle of the existing integral stem stopper is that a tire hole channel is filled by a round rubber rod; the mushroom nail is formed by connecting a rod body and a rubber cover, and the whole stopper stem and the rubber sheet are matched to form a split body. The connecting position of the rod body of the mushroom nail and the rubber cover extends to the tail end by 40mm, the diameter of the section is consistent, and the tail end of the section is pointed. The rubber rod specifications of the whole stopper stem and the mushroom nail are generally divided into 3mm, 4.5mm, 6mm and 8mm, the rubber rod and the mushroom nail repair operation flow are matched according to the whole stopper stem, the special carbonized steel drill bits with four specifications are correspondingly arranged, irregular hole damage channels are expanded and trimmed to round holes with the same inner and outer diameters by the steel drill bits in the tire repair process, and then the round holes are correspondingly plugged.

The tyre repair principle of the whole stopper stem matched with the rubber sheet and the mushroom nail is that a damaged hole is found accurately from the inner side of the tyre, the rod body is plugged from the inner side broken part, then the rod body is pulled to the rubber cover from the outside to be tightly attached to the inner wall of the tyre (the whole stopper stem needs to be attached to the rubber sheet separately), and the redundant part outside is cut off. The rubber cover is adhered to the broken part of the inner wall of the tire to seal the air.

Whether the tire is punctured by a blunt instrument or a conical sharp instrument, most of the injuries can automatically fold after the puncture object is pulled out, and the injuries are in a state of big outside and small inside.

When the tire is repaired by adopting the integral plug stem matched with a rubber sheet or a mushroom nail, an irregular hole-damaging channel is usually reamed and repaired to a round hole with the same inner diameter and outer diameter through a corresponding carbonized steel drill bit, in the process, a steel cord and cord fabric at the position within about 5mm of the inner side of a tire crown are often cut off, secondary damage is caused to the tire, more rubber stubbles often exist at the bonding interface of a rubber rod and the inner wall of a damaged hole, the cord fabric covers stubbles, the cord fabric stubbles, air-tight layer stubbles and the like, the outer wall of the rubber rod and the interface of the inner wall of the damaged hole are difficult to repair and fit, when emergency braking is met, the bonding interface around the damaged hole is torn, and the bonding interface is easy to open.

If the drilling is not carried out through the carbonized steel drill bit, the expansion plugging is directly adopted, the tension degree of steel cords and cord fabrics around the damaged hole can be changed, when a vehicle runs at a high speed, the steering wheel slightly shakes for a long time, the steel cords and the cord fabrics are easy to expand and break, the correction is timely carried out through the dynamic balance of the tire, and the slight shake of the steering wheel can be eliminated or reduced in a short time, but the radical treatment is difficult.

The existing tire repairing method adopting the large thick film has the disadvantages that the tire repairing method adopting the large thick film has larger risk if the tire repairing method is not used properly, for example, when a damaged hole within 6mm is repaired by the tire repairing film with the width larger than 75mm and the thickness larger than 4mm, the large thick film can increase the damaged airtight layer, the tension degree and the deflection interaction force around the damaged hole are changed too much, and therefore the air leakage probability is increased, and particularly, the probability of rubber cracking and air leakage is higher in the process of running with low air pressure inside the tire or full load size.

For the repair of the tire side wall and the tire shoulder, because the tire side wall and the tire shoulder are mainly subjected to the action of flexion and deflection, the risk is higher than the risk of the fracture of the steel cord if the most appropriate repair mode is not adopted in the repair process.

Therefore, the present invention is a method for repairing a tire, which can perform a targeted tire repair according to the actual damage of the tire to avoid the secondary damage of the steel cord and the cord fabric or the glue failure of the rubber sheet.

Disclosure of Invention

The invention aims to provide a tire repairing method, which aims to solve the technical problems of poor tire repairing effect and high risk caused by the adoption of the existing tire repairing mode in the prior art; the invention provides a plurality of technical effects which can be generated by the optimized technical scheme in the technical schemes; see below for details.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a tire repairing method, which comprises at least the following steps:

(I) judging the injury type: judging according to the state of the position of the injury after the puncture object is removed;

(II) measuring the size of the internal injury: measuring the maximum distance between the tire crown inner wall steel cord and the injury of the middle and inner positions of the cord fabric layer;

(III) calculating an injury difference value: measuring the maximum distance of the injury on the outer wall of the tire crown to obtain the size of the injury, and calculating the difference between the size of the injury and the size of the injury;

(IV) determining the type of the puncture repair and performing puncture repair according to the type of the puncture injury, the size of the internal puncture injury and the puncture injury difference.

Preferably, when the injury type is crown closure nailing holes, the size of the internal injury is not more than 1mm, and the difference value of the injury is not more than 3mm, a 40-50 mm rubber sheet is adopted for tire repair.

Preferably, when the injury type is crown closure nailing holes, the internal injury size is between 1mm and 2mm, and the injury difference value is not more than 3mm, a 45-60 mm rubber sheet is adopted for tire repair.

Preferably, when the injury type is an open crown injury hole, the internal injury size is not more than 2mm, and the injury difference value is not less than 3mm, the rubber sheets with corresponding sizes in the ranges of 40-60 mm, 45x75mm, 55x75mm and 65x80mm are adopted for tire repair.

Preferably, step (IV) is preceded by measuring the inclination of the injury; and (IV) determining the type of the puncture repair according to the type of the puncture injury, the size of the internal puncture injury, the inclination of the puncture injury and the difference value of the puncture injury, and performing puncture repair.

Preferably, when the injury type is an open crown injury hole, the size of the internal injury is between 3mm and 3.7mm, the difference value of the injuries is not more than 3mm, and the inclination of the injuries is not more than 15 degrees, the mushroom nails with corresponding sizes are adopted for tire repair.

Preferably, when the injury type is a crown open injury hole, the size of the internal injury is between 3mm and 3.7mm, the difference value of the injuries is not more than 3mm, and the inclination of the injuries is not less than 15 degrees, the tire repair is carried out by adopting an integral peduncle matched with 45x75mm film with corresponding size.

Preferably, when the injury type is a side wall injury hole or a shoulder tire injury hole, the width of the injury at the position close to the center of the cord fabric layer is not more than 3mm, and the length of the injury is not more than 4mm, the tire is repaired by using rubber sheets with corresponding sizes of 40-60 mm, 45x75mm, 55x75mm, 65x80mm, 70x115mm, 75x90mm and 85x130 mm.

Preferably, when the injury type is an open crown injury hole, the size of the internal injury is between 3.8mm and 5mm, the difference value of the injuries is not more than 3mm, and the inclination of the injuries is not more than 15 degrees, the mushroom nails with corresponding sizes are adopted for tire repair.

Preferably, when the injury type is a crown open injury hole, the size of the internal injury is between 3.8mm and 5mm, the difference value of the injuries is not more than 3mm, and the inclination of the injuries is not less than 15 degrees, the tire repair is carried out by adopting an integral stemming matched with 55x75mm films with corresponding sizes.

The tire repairing method provided by the invention at least has the following technical effects:

the method comprises the steps of (I) judging the type of the damaged condition, (II) measuring the size of the internal damaged condition, (III) calculating the difference value of the damaged condition, and (IV) determining the type of the repaired tire and repairing the tire.

The invention is suitable for repairing the tyres of cars, off-road vehicles, electric vehicle, medium passenger vehicles, motorcycles and the like which are damaged in the using process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic representation of the steps of the tire repair method of the present invention;

FIG. 2 is a schematic view of a puncture object puncturing a tire according to the present invention;

FIG. 3 is a schematic view of a radial tire construction for a passenger vehicle according to the present invention;

FIG. 4 is a schematic illustration of a vertical puncture wound of the present invention;

FIG. 5 is a schematic representation of an oblique puncture wound of the present invention.

Reference numerals

1. A puncture object; 2. injury condition; 3. a tread rubber; 4. a steel belt ply; 41. a first ply; 42. A first steel cord layer; 43. a second steel cord layer; 44. a second ply of scrim; 45. a wire cord cover layer; 5. an airtight layer; 6. a crown; 7. tire shoulders; 8. a sidewall; a. size of trauma situation; b. size of internal injury; beta, inclination of injury.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention provides a tire repair method, as shown in fig. 1, 2 and 4, comprising at least the steps of:

(I) judging the injury type: judging according to the state of the position of the injury 2 after the puncture object 1 is removed;

the injury 2 specifically refers to a state of the puncture object 1 after coming out of the tire, and includes a hole, a seam, and the like.

(II) measuring the size b of the internal injury: measuring the maximum distance between the inner wall steel cord of the tire crown 6 and the injury 2 of the centered inner position of the cord fabric layer through a tire wound detector or a tire wound detection cone;

(III) calculating an injury difference value: measuring the maximum distance of the injury 2 on the outer wall of the tire crown 6 by a tire wound detector or a tire wound detection cone to obtain an injury size a, and calculating the difference value between the injury size a and the injury size b;

the maximum distance of the injury 2 refers to the maximum distance on the horizontal plane of the wound at the corresponding position, if the injury 2 is a circular wound hole, the maximum distance of the injury 2 is the diameter of the wound hole, and if the injury 2 is a narrow wound seam, the maximum distance of the injury 2 is the maximum distance between two ends of the wound seam.

(IV) determining the type of the puncture repair and performing puncture repair according to the puncture type, the internal puncture size b and the puncture difference.

The main tools for actually repairing the tires of passenger vehicles comprise a tire dismounting machine, a tire balancing machine, an air compressor, a tire expanding machine, a jack, a lifting machine, a low-speed/high-speed grinding machine, a tire screw dismounting tool, a tire repairing compaction roller, a tire air pressure gauge, an angle grinder, a gun type dust collector, an electric hand drill, a carbonized steel drill bit, a point type tire repairing vulcanizing machine, an air bag type electric heating local vulcanizing machine and the like.

As shown in fig. 2-4, the side wall 8 is thin and soft, the crown 6 is thick and hard, the transition part between the side wall 8 and the crown 6 is the tire shoulder 7, the steel cord belt layer 4 at the inner side of the crown 6 comprises two layers of steel cords, two layers of cord fabrics and one layer of steel cord fabric covering layer 45, the diameter of the steel cords is 0.56-0.9 mm, the diameter of the cord fabrics is 0.56-0.9 mm, and the total thickness of the five layers of structures of the steel cord belt layer 4 is about 5 mm. The first layer of the steel belt ply 4 is a first cord fabric layer 41 from the inner airtight layer 5 of the tire to the outer, the cord fabrics are arranged at a transverse interval of 0.5-0.8 mm, the second layer is a first steel cord layer 42, the steel cords are arranged at a longitudinal interval of 0.5-0.8 mm, the third layer is a second steel cord layer 43, the steel cords of the second steel cord layer 43 and the steel cords of the first steel cord layer 42 are overlapped at a certain included angle to form a delta-shaped arrangement, the fourth layer is a second cord fabric layer 44, the cord fabrics are arranged at a longitudinal interval of 0.5-0.8 mm, and the fifth layer is a steel cord fabric covering layer 45. The outer side of the wire cord covering layer 45 is provided with a tread rubber 3 with a thickness of more than 10mm contacting the ground.

It can be known from the conversion of the reference pitch data of the steel belt 4 that at least one steel cord and one cord fabric are damaged (the error is within 0.3) per 1mm distance of enlargement in the process of drilling or trimming the original damaged hole.

In the actual damage condition of the tire, because the tread rubber 3 at the outer side of the tire crown 6 is not provided with the steel cord and the cord fabric, the damaged hole is larger, the inner layer of the tire crown 6 is provided with the dense steel cord and the cord fabric, and the wound gap is narrow, the invention can effectively reflect the fracture degree of the steel cord and the cord fabric through the damage type, the internal damage size b and the damage difference value, and reflect the fracture quantity of the steel cord and the cord fabric at the position of the tire damage condition 2, thereby determining the most appropriate repairing mode, effectively avoiding the secondary damage to the steel cord and the cord fabric in the tire repairing process, ensuring the tire repairing effect, improving the safety grade after the tire is repaired, and ensuring the driving safety of vehicles.

Examples 1 and 2 are shown in table 1.

TABLE 1

The crown closed nail hole means that the puncture object 1 is automatically closed after being separated from the tire and is in a closed and tight state.

The damage types of the tire in the embodiment 1 and the embodiment 2 are crown closed nail holes, the damage size b of the tire is within 1mm, the damage difference value of the tire is within 3mm, the number of damaged or broken steel cords and cord fabrics of the tire can be judged to be within 1, and films with corresponding sizes are selected from 40-50 mm films according to actual conditions to repair the tire, so that the repairing effect is remarkable, the tire is safer, and secondary damage to the steel cords and the cord fabrics cannot be caused.

If the integral stopper stem is matched with the rubber sheet and the mushroom nail material for repairing, a large risk exists, if the size of an internal injury is 0.1mm, and the injury difference value is 2.8mm, under the condition that the injury difference value is not measured, according to the operation flow of repairing the integral stopper stem matched with the rubber sheet and the mushroom nail, a 3mm special carbonized steel drill bit is adopted to ream and correct the closed nail hole of the crown to a cylindrical hole with the diameter of at least 2.5mm, and then the cylindrical hole is correspondingly plugged. Reaming to 2.5mm is compared with the original 0.1mm caliber, 2.4mm is expanded, at least two steel cords and two pieces of cord fabric are broken, and the breakage of the steel cords and the cord fabric is irreversible, so that the method has potential safety hazards, and the potential safety hazards can be effectively avoided while the repairing effect is ensured by adopting 40-50 mm films.

Examples 3 and 4 are shown in table 2.

TABLE 2

Examples 3 and 4, the injury type is crown closure spiked, the internal injury size b is between 1mm and 2mm, and the difference value of the injuries is not more than 3mm, and according to actual conditions, rubber sheets with corresponding sizes are selected from 45 mm to 60mm rubber sheets to repair the tire, which is similar to the original reasons of the examples 1 and 2.

Examples 5 and 6 are shown in table 3.

TABLE 3

The open wound hole of the tire crown refers to the condition that after the puncture object 1 is separated from the tire, the steel cord and the cord fabric are damaged or the rubber is damaged, and a larger gap or gap is formed.

Examples 5 and 6, the injury type is crown opening injury, the internal injury size b is within 2mm, and the injury difference is not less than 3mm, according to the actual situation, the rubber sheets with corresponding sizes are selected from 40-60 mm, 45x75mm, 55x75mm and 65x80mm films to repair the tire, which is similar to the original reasons of examples 1 and 2.

Under this condition if adopt whole stopper stalk cooperation film or mushroom nail material to repair the operation flow according to whole stopper stalk cooperation film and mushroom nail, adopt and correspond special carbonization steel drill bit, reaming, repair can lead to more steel cord and cord fabric fracture, and the risk is very big.

The tire crown open wound hole and the tire crown closed nail hole with the difference value of the wound condition larger than 3mm can not be repaired by matching the integral stem with a rubber sheet or a mushroom nail, and the closed nail hole with the difference value of the wound condition larger than 3mm is few.

Because the tire prick nail mostly slowly leaks air, and big outside is little inside, if the wounded situation is the crown wounded situation that the inner wall is 0.1 ~ 1mm just outcrop, it is opposite with the shape of whole stopper stalk or the stick body tip of mushroom nail. If the tire crown is damaged and is reamed by an electric drill and trimmed into a standard round hole with consistent inner and outer diameters, the steel cord and the cord fabric at the position within about 5mm of the inner side of the tire crown can be cut off.

If the tip of a sliding surface conical body penetrates into the distance between the steel cord and the cord fabric, the steel cord can be pushed to two sides when the sliding surface conical body is pushed forwards, the probability of breakage of the steel cord and the cord fabric is small or not broken, the injury generally has an injury difference value larger than 3mm, and secondary damage to the steel cord and the cord fabric cannot be caused by using a rubber sheet for patching. However, when the whole stopper stem is matched with a rubber sheet or a mushroom nail for repairing, the tire crown injury needs to be reamed and repaired, and secondary superposition damage is easily caused.

If the tyre with the damage difference value larger than 3mm is used as the tyre crown, the steel cord and the tyre cord fabric are always drilled off if the integral stopper stem is matched with a rubber sheet or a mushroom nail for repairing the tyre. The expansion type plug is adopted without reaming, so that the steel cord and the cord fabric can be extruded and dislocated, the tensity of the steel cord and the cord fabric is changed, and the risk is further increased. The hole is not reamed, the damaged hole is not trimmed, and the expansion plug-in is not performed, so the plug-in cannot be performed at all.

The present invention further provides a tire repair method, as shown in fig. 1 and 5, including at least the steps of:

(III) calculating an injury difference value: measuring the maximum distance of the injury 2 on the outer wall of the tire crown 6 by using a tire wound detector or a tire wound detection cone to obtain an injury size a, and calculating the difference value of the injury size a and the distance of the injury 2;

(IV) measuring the inclination of injury beta;

as shown in FIG. 5, the injury slope β is the inclination angle of the injury 2 with respect to the radial direction of the tire.

(V) determining the type of the tire repair according to the injury type, the internal injury size b, the injury gradient beta and the injury difference value, and performing tire repair.

Examples 7 and 8 are shown in table 4.

TABLE 4

When the injury types of the embodiment 7 and the embodiment 8 are crown open wounds, the size b of the internal injury is between 3mm and 3.7mm, the difference value of the injuries is not more than 3mm, and the inclination beta of the injuries is not more than 15 degrees, mushroom nails with corresponding sizes are selected to perform tire repair.

When the internal damage size of the open wound hole of the tire crown is larger than 3mm, because the tire damage is not a closed nail hole, the wound hole on the outer wall of the tire crown has rubber defect and presents larger gaps or gaps, and under the action of external force, sand can be squeezed into the rough wound hole channel wall with steel wire stubbles, rubber stubbles and cord fabric stubbles. Although the sand is continuously deepened along with the extrusion depth, the resistance of the sand is larger, but part of the sand still enters the position, close to the film repairing position, of the inner wall of the tire crown, so that the risk of extrusion and degumming of the film exists, and therefore, compared with other tire repairing materials, when the damage difference value is smaller than 3mm and the damage size in the open damage hole of the tire crown is larger than 3mm, when 1-2 steel cords and 1-2 pieces of cord fabrics are ensured not to be damaged or only to be damaged, the mushroom nail tire repairing material is adopted to be dominant, the safety level is higher, and the mushroom nail tire repairing material with the corresponding size is used for repairing.

If the existing mode is adopted, the external injury size a is not measured, the internal injury size b is not measured, the injury difference value size is not calculated, the tire repair material is directly and blindly used, and the problem that the material size is not matched with the injury size accurately or the material type is not corresponding can be caused. The existing tire repairing mode does not measure the difference value of the injury, so that the dimension of the material using the mushroom nail does not correspond to the dimension of the injury, the adopted dimension is large, the fracture of a steel cord and cord fabric is increased, the adopted dimension is small, the channel for sealing and blocking the injury hole is not firm, the tire can be degummed and leaked in use after being repaired, and the driving safety can be endangered by the large or small dimension; if the rubber sheet tire repair material is adopted, in the use process after repair, when granular objects are extruded into a tire wound hole channel by external force, the rubber sheet top is degummed and leaks air, and the driving safety is endangered. Therefore, mushroom spikes are the most suitable repair solution in this condition.

Examples 9 and 10 are shown in table 5.

TABLE 5

In examples 9 and 10, when the injury type is an open injury hole on a crown, the size b of the internal injury is between 3mm and 3.7mm, the difference value of the injury is not more than 3mm, and the inclination beta of the injury is not less than 15 degrees, the tire repair is most suitable by selecting the integral stopper rod matched with 45x75mm film with the corresponding size, the reason is similar to that of examples 7 and 8, the difference is that the examples 9 and 10 have larger inclination, and the integral stopper rod matched with the film can effectively ensure air tightness and reduce the air leakage probability, so the integral stopper rod matched with the film is the most suitable repair scheme under the condition.

Examples 11 and 12 are shown in table 6.

TABLE 6

The shoulder hole means that the puncture position of the puncture object 1 is positioned on the shoulder 7, so that the position is damaged, and a large gap or gap is formed.

The side wall damage hole means that the puncture position of the puncture object 1 is positioned on the side wall 8, so that the position is damaged, and a large gap or gap is formed.

In examples 11 and 12, when the injury type is a side injury hole or a shoulder injury hole, and the width of the injury 2 at the central inner position of the cord fabric layer is not more than 3mm and the length is not more than 4mm, films with corresponding sizes in 40-60 mm, 45x75mm, 55x75mm, 65x80mm, 70x115mm, 75x90mm and 85x130mm are selected according to actual conditions for tire repair, and the speed of the tire repaired by the examples 11 and 12 is limited to 50 kilometers.

Examples 13 and 14 are shown in table 7.

TABLE 7

When the injury types of the example 13 and the example 14 are crown open wounds, the size b of the internal injury is between 3.8mm and 5mm, the difference value of the injuries is not more than 3mm, and the inclination beta of the injuries is not more than 15 degrees, the mushroom nails with corresponding sizes are adopted for repairing the tire, and the tire is originally used for 50 kilometers of the speed limit tire repaired by the example 13 and the example 14 similarly to the example 7 and the example 8.

Examples 15 and 16 are shown in table 8.

TABLE 8

In examples 15 and 16, when the injury type is crown opening injury, the internal injury size b is between 3.8mm and 5mm, the difference of the injury is not more than 3mm, and the inclination of the injury beta is not less than 15 degrees, the tire repair is most suitable by using an integral stopper stem matched with 55x75mm rubber sheets with corresponding sizes, which is originally similar to the tires in examples 9 and 10 and is used for limiting the speed of the repaired tires in examples 15 and 16 to 50 kilometers.

The invention is also used for repairing the tire with the tire pattern below 4.5mm, the production date above 3 years, the appearance of the tire having scratches, rubber defects, cracks, lacerations and corrosion for more than 2 times and the included angle of the circle centers of the damaged holes being less than 90 degrees, and the speed of the repaired tire is limited to 50 kilometers.

And the tire is irreparable when the tire is damaged or deformed by tire bead defect or deformation, tire tread deformation, air-tight layer 5 blistering, tire overall structure damage, rubber corrosion by chemicals or tire under-inflation rolling damage and the like.

The grades of the repaired tires of examples 1 to 16 of the present invention are shown in Table 9.

TABLE 9

The repaired grade is a repaired grade obtained by driving under standard conditions with reference to a new tire from a factory as a grade a.

The fracture of the steel cord and the cord fabric of the framework structure of the passenger vehicle tire is irreversible, the tire is still in a fracture state after being repaired, only the tire is repaired without air leakage, the steel cord and the cord fabric of the framework structure of the tire are still in the fracture state, the steel cord and the cord fabric have no slight repairing effect, and if the whole stopper is matched with a rubber sheet or a mushroom nail tire repairing material is used for repairing the tire improperly, the secondary damage of the steel cord and the cord fabric can be caused. In addition, the normal-temperature vulcanization tire repair materials in the market are all bonded or bonded by a bonding process, the tire repair materials comprise an integral stopper stem matched rubber sheet and a mushroom nail, and the bonding or bonding process is that linear molecules of interface rubber react to diffuse and permeate under the action of a rubber vulcanizing agent to form a three-dimensional net structure for bonding. Therefore, the quality of the repaired tire of the passenger car can not reach the quality of the tire when the tire is delivered from the factory.

According to the number of broken steel cords and cord fabrics (errors are 0.3), damage condition difference values, damage types and damage positions of the steel cords and the cord fabrics of the tire framework structure of the passenger vehicle, and the reference grade and the use range after repair, which are driven under standard conditions, are marked by taking the grade A of a factory new tire as a reference.

The post-supplementation rating is specified as follows:

b +: according to the tire with closed tire crown, the internal damage size B is not more than 1mm, the damage difference value is not more than 3mm, the damage or the breakage of the steel cord and the cord fabric is less than 1, the damage or the breakage of the steel cord and the cord fabric is 1, and the grade after repairing is B +.

B-: according to the tire with closed tire crown, the internal damage size B is not more than 2mm, the damage difference value is not more than 3mm, the damage or the breakage of the steel cord and the cord fabric is more than 1 respectively, the damage or the breakage of the steel cord and the cord fabric is less than 2 respectively, the damage or the breakage of the steel cord and the cord fabric is 2 respectively, and the grade after the repair is B-.

C-: according to the tire with the crown being open and the internal injury size b not larger than 2mm, the injury difference value not smaller than 3 mm; the steel cord and the cord fabric are damaged or broken by more than 1 respectively, the steel cord and the cord fabric are damaged or broken by less than 2 respectively, the steel cord and the cord fabric are damaged or broken by 2 respectively, and the grade after repairing is C-.

The owner should be informed that the customer is prohibited from installing a tire of grade C-after repair on the front wheel.

C-: according to the tire with the tire crown being openly damaged, the internal damage size b is 3-3.7 mm, the damage difference is not more than 3mm, and the damage gradient beta is not more than 15 degrees; the tire with the crown being open and having the internal injury size b of 3-3.7 mm, the injury difference value being not more than 3mm and the injury inclination being not less than 15 degrees; the steel cord and the cord fabric are damaged or broken by more than 2 respectively, the steel cord and the cord fabric are damaged or broken by less than 3 respectively, the steel cord and the cord fabric are damaged or broken by 3 respectively, and the grade after repairing is C-.

The speed limit is 50: according to the tire with the width of the tire side damaged hole and the tire shoulder damaged hole not more than 3mm and the length not more than 4 mm; the tire side 8 and the tire shoulder 7 are both limited in speed by 50 after puncture repair.

The vehicle owner should be informed that the customer is prohibited from installing the tire with the speed limit 50 grade after repair on the front wheel and that the speed limit is temporarily or emergently used for 50 km/h.

Limiting the speed: the tire with the tire crown opening, the damage condition difference value is not more than 3mm and the inclination is not more than 15 degrees is within 3.8-5 mm of the damaged hole; the tire with the crown within 3.8-5 mm of open damaged holes, the difference value of the damage condition not more than 3mm and the inclination not less than 15 degrees has the damage or breakage of more than 3 steel cords and cord fabrics, the damage or breakage of 5 steel cords and cord fabrics, and the grade after repair is 50 speed limit.

The vehicle owner should be notified that the tire rated 50 speed limit after repair is prohibited from being installed on the front wheel. And the speed limit is 50 km/h for temporary or emergency use.

As can be seen from table 9 in conjunction with the description of the repaired grades, the tire repairing method of the present invention not only has a good tire repairing effect, but also facilitates the vehicle owner to clearly know the service grade of the repaired tire.

On the basis of the invention, in order to further ensure the repairing effect of the radial tire of the passenger vehicle, the following process requirements are provided:

(1) the residual air in the interlayer is not sealed in the steel wire belt layer 4 by using an integral stopper matched with a rubber sheet or a mushroom nail material and is naturally discharged.

(2) When the integral stopper is matched with the rubber sheet and the mushroom nail material to repair, bore and trim, attention should be paid to the fact that the steel cord and the cord fabric are not damaged secondarily as much as possible, the damage quantity should be controlled within 1 steel cord and 1 cord fabric, and the steel cord and the cord fabric should not be implanted into a damaged channel violently, so that the steel cord and the cord fabric are extruded and dislocated, and the tension degree of the steel cord and the cord fabric is changed.

(3) The damaged condition difference value is calculated by using a tire wound detector or a tire wound detection cone in the whole stopper stem matched rubber sheet and mushroom nail repairing process, and the diameter data of the cone body which is separated from a damaged hole of the tire cannot be measured by using a vernier caliper and used as tire repairing reference data.

(4) The operation is correspondingly selected according to the invention according to the injury difference, the internal injury size, the injury type and the position and the like.

(5) Conventionally used passenger tires are not necessary and should not be cut for stripping, hole expansion, splice cords.

(6) The conventionally used passenger car tire is not necessary, and the rubber sheet which is thickened and is provided with a steel cord layer and a cord fabric layer is not needed to be repaired.

(7) The wound polishing area is defined, the airtight layer 5 is polished to be even by a low-speed polishing machine, the cord fabric is not polished, and the damaged airtight layer 5 is not expanded as much as possible.

Special cases tires inevitably wear to the cords and should be cured at a low temperature in a spot form.

(8) Note that the air barrier 5 should not be pasted, uneven. The wound area and the wound tunnel should be cleaned. The applied curing agent should be uniform.

(9) And (3) carrying out patching operation after the applied vulcanizing agent is dried and ventilated, pasting the film, paying attention to whether the film has direction requirements and the center of the film is aligned with the center of the wound hole, carrying out central air exhaust type manual patching, and then carrying out central rolling flattening towards the periphery.

(10) The partial rubber spot vulcanization is carried out according to the GB/T21286 regulations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, in the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of repairing a tire, comprising at least the steps of:

(III) calculating an injury difference value: measuring the maximum distance of the injury on the outer wall of the tire crown to obtain the size of the injury, and calculating the difference value between the size of the injury and the size of the injury;

2. The tire repair method according to claim 1, wherein when the type of the injury is crown closure nailing, the size of the internal injury is not more than 1mm, and the difference value of the injury is not more than 3mm, the tire repair is performed using a 40-50 mm film.

3. The tire repair method according to claim 1, wherein when the injury type is crown closure nailing, the internal injury size is between 1mm and 2mm, and the difference in the injuries is not more than 3mm, the tire repair is performed using a 45-60 mm film.

4. The tire repair method according to claim 1, wherein when the injury type is a crown opening injury hole, the internal injury size is not more than 2mm, and the difference in the injuries is not less than 3mm, the tire repair is performed using a film having a corresponding size in a range of 40 to 60mm, 45x75mm, 55x75mm, 65x80 mm.

5. The method of repairing a tire of claim 1, wherein step (IV) is preceded by measuring a gradient of the injury;

and (IV) determining the type of the puncture repair according to the type of the puncture injury, the size of the internal puncture injury, the puncture injury inclination and the puncture injury difference value, and performing puncture repair.

6. The tire repair method according to claim 5, wherein when the injury type is a crown opening injury hole, the internal injury size is between 3mm and 3.7mm, the difference in the injuries is not more than 3mm, and the inclination of the injuries is not more than 15 °, the tire repair is performed using mushroom nails of corresponding sizes.

7. The tire repair method according to claim 5, wherein when the injury type is a crown opening injury hole, the internal injury size is between 3mm and 3.7mm, the injury difference is not more than 3mm, and the injury gradient is not less than 15 °, the tire repair is performed by using an integral stopper rod matched with 45x75mm rubber sheets with corresponding sizes.

8. The tire repair method according to claim 1, wherein when the injury type is a crown opening injury hole, the internal injury size is between 3.8mm and 5mm, the difference in the injuries is not more than 3mm, and the inclination of the injuries is not more than 15 °, the tire repair is performed using mushroom nails of corresponding sizes.

9. The tire repair method according to claim 1, wherein when the injury type is a crown opening injury hole, the internal injury size is between 3.8mm and 5mm, the injury difference is not more than 3mm, and the injury gradient is not less than 15 °, the tire repair is performed by using an integral stem fitting 55x75mm film of a corresponding size.