Evergreen Tbr Tire Claim Anaylsis 130125

8/12/2019 Evergreen Tbr Tire Claim Anaylsis 130125

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Claim Coverage

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Claims Coverage

Authentic tires: The qualified tires products with complete product marking

including brand, tire number and size after inspection.

Authentic tires used under normal usage regulation, within three years after

production, pattern abrasions accord with claims provisions, early damage caused by

production defect.

Defective or substandard of new tires (For instance, Short of filler, existing sundries

and uneven inner ply of missed inspection tires )

) Others


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Production causes and analysis


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Loose TreadCharacteristic: Separation between

rubber/rubber, rubber/framework

material of tread, steel belt loosing,cause the bulge of tread, tread filler

loosing, steel belt wire loosing,

drawing out or breaking.

Analysis:

1.Weak adhesion of filler during

production .

2.Material surface crocking caused

by placed excessive hours.

3. Uncompacted or dislocation of

some parts


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Separated Crown JointCharacteristic:

Crown joint separated in slope

shape, smooth surface onseparated area.Analysis:

1. Inadequate connection of

Crown joint area.

2. There are water, petrol, dust or f

on surface or crocking of joint

during production.


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Hollow in Tire Shoulder

Characteristic:

No external injury and impact, no

crushed rolling and deformed,rubber and cord fabric on shoulder

area separated.Analysis:

1.Un-compaction or air harboring

between steel belt terminals duringproduction.

2. Weak adhesion between tire

parts.


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Tire Shoulder CrackingCharacteristic:

Ply separation accompany with

cracking on circumferential

direction, there is rubber foam andsolvent separating out, there is

sticky substance on ply separation

area after anatomy.Analysis:1. Under cure2 Volatile solvent still wet duringshaping

Pl S i Sid ll


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Ply Separation on SidewallCharacteristic:

There is ply separation between

sidewall filler/carcass or sidewall

filler/bead filler which caused

blister, no injury on external

surface, the separation ply surface

is smooth.Analysis:

Uncompacted Rolling, air bubble

come into being during different

parts or water and petrol

penetrated.

U h b t


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U shape burstU

Characteristic:

Tire sidewall burst in U shape, steel

belt wire are bared and undamaged,

and no impact mark oncorresponding tread or sidewall

areas.UAnalysis:

1. Uncompacted rolling on sidewall.2. Air harboring in sidewall

3. Weak adhesion of tire parts.

Pl ti id ll j i t


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Ply separation on sidewall joint

Characteristic:

Ply separation on radial direction,

the surface of separated area issmooth.Analysis:

1.Sidewall joint is not clean

2. Joint area uncompacted.

Pl ti ti b d


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Ply separation on tire beadCharacteristic: There is partial ply

separation on circumferential

direction on turn-up part, there is

obvious feeling of air bubble if pressby finger.Analysis: Uncompacted different

parts which cause air bubble or

isolation medium.

Steel belt cord bared on inner ply


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Steel belt cord bared on inner plyCharacteristic:

No external injury and impact mark,

the inner plys steel belt wire can be

seen on partial or wholecircumferential part near shoulder,

sidewall area.Analysis:

1.Filler material of inner ply irregularflow during curing process.

2. Nonstandard size of semi-

manufactured products, e.g. tire

crown, cushion gum, etc.

Ply separation on inner ply


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Ply separation on inner plyCharacteristic:

Separation between inner ply and

cord fabric, the interface is smooth

after anatomy.Analysis:

1.Week adhesion or air, petrol

existing between inner ply and steel

belt cord during production.

Sundries


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Sundries

Characteristic:

Partial cracking on upper joint area

of tire bead and rim, existing

sundries after anatomy.Analysis:

There is sundries on interface area

during production.


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Non-claim coverage


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Causes and Analysis of Improper Use

Pl S ti C d b T d P t


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Ply Separation Caused by Tread PunctureCharacteristic:

Ply separation on shoulder, the

corresponding tread have obvious

puncture mark.Analysis:

Tire steel belt wire punctured by

obstacle led to air and water

penetrated and rusty steel belt

broken.

Mechanical Damage of Tread Pattern


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Mechanical Damage of Tread PatternCharacteristic:

Steel belt exposed when partial

tread pattern filler seriously

separate from carcass.Analysis:

Excessive inflating caused tread

inflexibility enhanced, the tread cut

by sharp objects when driving on

unpaved road and caused chipping.

Irregular Abrasion On Tread Pattern


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g Characteristic:

Irregular abrasion on every parts

of tread pattern.

Analysis:

1.Do not have periodical Tire

Rotation (Annex 1).

2.Bad vehicle condition.

3.Irregular air pressure.

4. Improper operation of driving.

Annex1: Correct tire rotation


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Annex1: Correct tire rotation

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Correct Tire Rotation

Lorry


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Lorry

Lorry, Directional pattern


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y, p

Six wheels and two axles circular rotation


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Six wheels and three axles circular rotation


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Six wheels and three axles circular rotation

Impact and bursting on Crown


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Characteristic:

Tread impacted by external

objects and cracking in /, X,

Y shape, steel belt breaking and

exposing, the terminal of bursting

have no ply separation evidence,

sometimes it obviously have

tearing evidence while bursting. /XYAnalysis: Strong impact caused

by obstacle when tires are

overloading, driving on high

speed and high pressure.

Impact and Bursting on Shoulder


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Characteristic:

Bursting on shoulder, steel belt

wire breaking.

Analysis:

Shoulder strongly impacted by

obstacle when driving on uneven

road caused bursting.

Zipper Type Bursting


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Characteristic:

Sidewall steel belt wire breaking

and bursting in zipper type. Analysis:

1.Overloading

2.High pressure

3.Rapid shift

Which led to steel cord of sidewall

undue stressed to burst.

Cracking on sidewall


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Characteristic: Sidewall cracking

on radial direction, obvious

scratch mark and steel belt wire

breaking.Analysis:

1.Sidewall extremely deformed

and crack after impact on tires.

2. Incompact steel belt wire

cause sidewall blistering, cracking

and breaking in serious condition.

Crushed rolling of sidewall


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Characteristic:

Tire carcass deformed, wrinkle

mark on inner ply caused by

carcass excessive flexing. Carcass

is screwy or burst in serious

condition.Analysis:

1.Seriously overloading

2.Long-term driving in low air

pressure or seriously under-inflated condition

Which led to crushed rolling even

burst

External damage on sidewall


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Characteristic:

Sidewall damage by cut or

abrasion, steel belt wire can be

seen in serious condition.Analysis:

1.Cut by sharp objects when

driving.

2.Bad road condition.

3. Sidewall circumferential cut

by auto parts of other extrusive

objects.

Burst on Tire Bead


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Characteristic:

Tire bead burst, there is obvious

cutting mark on corresponding

chafer area.

Analysis:

1. Chafer damage caused by rap

during tire mounting.

2. Seriously overloading.

3. Using low-intensity rim.

4. Chafer cut by defective rim.

Pinch damaged on chafer


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Characteristic:

Partial external damage on chafer,

partial damage on bead filler rubber,

steel belt wire bared in seriouscondition.Analysis:

Pinch damaged by tire lever on tire

bead when tire mounting or

dismounting.

Tire bead bulging


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Characteristic:

Tire bead ductility deformed, the

interface have tearing evidence after

anatomy.

Analysis:

Using improper rim or seriously over

loading.

Bead Wire Breaking and Bursting


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Characteristic: The bead wire

breaking, the endpoint of cord

stretching and diameter reducing.

Analysis:

1.Using defective rim or tire chafer

damaged.

2.Impacted when driving on high

speed caused bead wire breaking

and then led to burst.

3.Rim board defect.

4. Partial bead wire impacted by

external force and caused stress

concentration, which led to burst.

Cracking upon Assembled Rib


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Characteristic:

The upper joint area of tire bead

and rim have cracked on

circumferential direction. The

breaking interface is irregular.Analysis:

Seriously overloading, improper

rim, or partial deformed, high

pressure;high torque force tear apart during

long vehicle rapid swift

Cracking on Assembled Rib


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Characteristic:

The endpoint of cord fabric is

cracked on circumferential

direction or in zipper type.

Analysis:

1.Seriously overloading or low

pressure.

2.Mounted on defective rim caused

sidewall deformed and stress

concentrated on assembled ribarea led to excessive flexing and

cracking.

Cracking under Assembled Rib


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Characteristic: The cracking

under assembled rib appear on

circumferential direction,

meanwhile, chafer is deformed.

Analysis:

1.Mounted on substandard rim,

seriously overloading or under-

inflated caused flexing spot

downward moving.

2.Braking or turning frequentlyled to deformation and cracking.

Bead Burst in Wiredrawn Type


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Characteristic:

Steel belt wire draw from wire bead

and burst crack to shoulder.Analysis:

1.Using defective rim caused

stress concentrated on bead;

2.Impacted when driving;

3.Very small steering angle of turn

sharp;

4. High temperature of brakinggenerated abnormal heating of

bead which lead to adhesive force

becoming low and burst.

Bead Inside Cracking


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Characteristic:

No distortion of carcass, no other

fault caused by improper use.

Chafer cracked from inside ply on

circumferential direction.Analysis:

1.Mounting defective rim.

2.Under-inflated or overload

driving.

3. Turn sharp and brakingfrequently caused over flexing and

deforming on assembled rib part,

which led to cracking of chafer

inside endpoint.

Inner cracking caused by external Impact


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Characteristic:

Cord fabric of inner ply cracked

in I shape, sidewall penetrated

in serious condition.

lAnalysis:

1.Tire impacted strongly by

obstacle when driving;

2.Tire squeezed when vehicle

parking next to the roadside.

3.Tire damaged by side obstaclewhen slipping.


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Evergreen Tbr Tire Claim Anaylsis 130125

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