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8/12/2019 Evergreen Tbr Tire Claim Anaylsis 130125
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Claim Coverage
1
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1
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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1 2
Six wheels and two axles circular rotation
Six wheels and two axles circular rotation
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Six wheels and two axles circular rotation
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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