7/26/2019 6.Uploads-downloads-DOWN 37079841C7A76AF8Brygram6 Tyre
Creel Room
1/1
Also spelt as *Tire in some countries
FFPs Frequently Faced Problems
During the manufacturing process of radial tyres, presence
of
high humidity leads to rusting of steel wires, which results
inlarge rejection rate and loss of strength as rusting
preventsproper bonding between the steel and rubber.
General Recommendations
Relative Humidity in the Creel Room must be maintainedbetween
20!" at 2!!#C
Our Solutions
The Radial Tyre
$ radial tyre is an improvement on the conventional % bias
tyre.&he essential difference is the placement of piles and
theaddition of belts. 'n a conventional % bias tyre the piles
run
diagonally across the tyre from bead to bead. 'n each successive
layer, the cords run in opposite directions. 'n aradial tyre, the
cords are radially placed, perpendicular to the central line of the
tyre.
&he radial is an improvement over the conventional % bias
tyre on many fronts a longer life, lower fuel consumption,greater
riding comfort and s(id resistance, which e)plains the shift from
the conventional ply technology.
$ll radials are however not the same. &he piles may be
encased in a belt made of steel, fibreglass, rayon or nylonfabric.
However the radials in which the belt is made of steel instead of
fabric or fibreglass are the most efficient.&he steel belted
radials are, therefore the most commonly used radials. &he only
dis* advantage observed, is therusting of steel belts over a period
of time leading to the tyre+s uic(er wear and tear. -sing the nylon
casing overthe steel eliminates rusting during usage. However due
care is always required during the manufacturingstage to see that
rusting of steel belts does not occur during the bonding
!rocess"
The #anufacturing Process
anufacturers follow various processes for preparing the
multi*layer tyres. /ome use only steel belts for that added
strength, others add cross (nitting of steel wires, which ma(es
it stronger. &he room in which steel wires arecovered with
fabric, converting it into a single bonded ribbon, which is, than
braided, is referred to as the $reelRoom.
'n the Creel Room, various wires of fabric and steel pass to the
winding machine from large spools. resence ofhigh humidity in this
room leads to rusting of steel wires, leading to a large rejection
rate and loss of strength.Rusting prevents proper bonding between
the steel and rubber. Dehumidification of Creel Room therefore
becomesa vital application area.
/olution
1ry*$ir has installed several dehumidifiers in creel rooms for
all the well*(nown tyre companies maintainingconditions of 20!" RH.
Due to the nature of the manufacturing, the area surrounding the
creel room may be at a
temperature and humidity higher than normal ambient conditions.
'n the Creel Room, various wires of fabric andsteel pass to the
winding machine from large spools. &his total area is ta(en
into consideration while calculatingmoisture load. $lso, sufficient
ma(e*up air is introduced to provide the positive pressure in the
space 't is alsoimperative that when the cord leaves the creel
room, it must travel through ambient air.
$t this time, if the temperature of the cord is below the
dewpoint temperature of this ambient, moisture willcondense on it
and be trapped in the finished ply. &herefore the cord must
never leave the creel room unless it is ata temperature above the
dewpoint temperature of the ambient air it will pass through
&yres incorporating thesuperior radial tyre technology have
withstood the test for a longer life than conventional tyres. $ll
this has beenmade possible due to adherence to uality manufacturing
practices. $dding a desiccant dehumidifier to protect thesteel cord
ensures a lasting bond, which never tires3
BRYGRAMBRYGRAMTyre% $reel Room
odified on4 05st$ugust 2055
www.brya i r .com &
