Textile Treating Systems Brochure

COIhPONENIS
LET OFFS
Let Offs accurately control fabric tension using
load cell feedback for closed loop control. Multipuck brakes or inverter drives provide a wide range
of operating tensions to process both light and hear,y
fabrics.
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ACCUMULATORS
Fabric Storage Accumulators maintain continuous
operation of the treating system. Hydraulic cylinders
provide uniform and adjustable tension on the fabric.
Rigid construction, pre-stretched chains and
alignment shafts provide positive tracking to prevent
fabric shift for years of consistent operation.
A(UMUIATORS
PLAS-TANK Dipping Stations
Litzler Dip Tanks, sized to minimize dip waste, are
made of high-molecular-weight polymer. The plastic
has enhanced release properties that reduce cleaning
time as much as 75 percent.
Litzler Uni-Squeeze Rolls assure uniform squeeze
pressure.Squeezeboost is activated by the LMMI for
extra pressure when splices are detected.
PLAS-VAC Vacuum Extractors
The Litzler PLAS-VAC Vacuum Extractor, or
DeWebbel was developed with extensive research and
customer input and uses the latest technology in both
construction and control. The system plays a critical
role in adhesion and product quality.
The PLAS-VAC includes a vacuum head, primary
settling box, secondary settling box, bag filter and fan.
For easycleaning, the vacuum head and primary settling
box are made of the same high-molecular-weight polymer as Litzler Dip Tanks. Vacuum pressure for each
product is controlled via LMMI using inverter AC variable speed drives with feedback pressure sensors.
The Litzler PLAS-VAC also features:
r SLOT-CLEAN, a continuous automatic slotcleaning device.
. Easy-to-remove, track-mounted heads with a
repeatable positioning system.
. A precision-machined,nozzle
accurate suction velocity.
slot ensures
. A high static pressure blower with an AC inverter
drive motor to suit all parameters.
. Prirnary polymer settling box for fast, efficient
separation.
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MM (Match Machined)
Tension Stands
Litzler MM Tension Stands convey the tire cord
through the treating system and allow separate
tensions in the process zones. Matched machining
ensures perfect alignment of rolls, bearings and gears.
All bearings are lubed for life. Each tension stand
includes an automatic oil pumping lubrication system
for the gears.
Engineers use computerprograms to selectthe proper
number and size of tension stand rolls and bearings.
To ensure critical alignments and reduce field
installation time and cost, Litzler MM tension stands
are fully factory assembled, tested and certified to
exacting standards.
PERFECT-WIND Surface Winders
The Litzler PERFECT-WIND Surface Winder,
which produces rolls up to 2000 mm in diameter,
maintains accurate end count from beginning to end
ofthe wound package and ensures a finished package
with straight edges.
o Litzler's patented, three-ftnger spreader -- the
Rolliner -- spreads treated tire cord and orients
selvages prior to winding.
o An electronic loadcell precisely measures
compaction force to accurately control package
hardness. This assures square sided packags
within a guaranteed tolerance
+l- 2nm layer to layer.
. Easy-tGuse touch screerr contnols,
ergonornic desigr and asmooth
ejection system allow for quick
and easyroll doffs.
. The Litzler Perfect-Cut motorized
cutoffcan be installed at the
windingtable.
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OVENS
PROCESS
The heart of every Litzler Fabric Treating System
is the Heat-Set Oven, where the molecular orientation
of the individual filament occurs. Precisely controlled
time, temperature and tension determines the ultimate
strength and modulus of the cord within the fabric.
The Normalize Oven reheats the fabric at a slightly
lower temperature and with less stretch and tension.
This relaxes the cord and provides an additional 5 to
15 percent tensile strength to the individual cords.
and Features
Construction
The oven supply system directs high velocity
heated air at the cord with Litzler's proprietary nozzle
jets. The computer-designed supply headers and
nozzle jets provide rapid and uniform heating'
Temperature accuracy and heat transfer uniformity is
+/- 1.5'C across the web and +/- 2.5"C from top to
bottom of each oven.
In addition to Litzler nozzlejets, there are several
features exclusive to Litzler tower ovens:
. VAPOR-PROOF -- An all-welded panel system.
Since no contaminates or finish oils can penetrate the
panel, fire hazards are greatly reduced.
. SUPER-SEAL -- A sealing system to create a
mechanical labyrinth against leakage.
. LITZ-COOL -- A quick-cool system. In the event of
an emergency stop, the hot jetted air is automatically
directed away from the fabric and through the exhaust
system. This prevents melting of cord during an E-stop.
. PLASMA COATED Oven Rolls -- Rolls after the
dip are coated with a metalized coating. The coated
rolls minimize pick off, eliminate static, last longer
than Teflon sleeves and are easier to clean than
chrome plate.
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NANSMITTER
LMMI controls the oven temperature and air
velocity via precisely located thermocouples and
velocity sensors. Additional sensors are placed in
strategic places to monitor temperatures throughout
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Litzler custom designs ovens that are heated
efficiently, using the most cost-effective fuel available.
Fuel tytrresinclude:
. ELECTRIC
OLPG & NATURAL GAS
. STEAM
. FUEL OILS
. COAL
Direct or indirect heaters are easily integrated
into Litzler oven systems. When using LPG gas,
natural gas or low sulfur light fuel oil, a direct heating
system is recommended. When high sulfur oil, hear,y
fuel oil or coal are available, indirect heating methods
are recommended. Indirect steam heating also is used
in lower-temperature ovens up to 180'C.
The most common indirect heating system is the
Circulating Heating Fluid System. A high-efficiency
heater heats the circulating hot oil up to 315.C. Heat
exchangers transfer the hot oil thermal energy to the
circulatins air stream.
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SIANDARD DOUBLE DIPPING SYSTEM
A standard Litzler In-Line double dip treating unit
has a typical speedrange to over 100 mpm.
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HIGH-SPEED BACK-TO-BACK
DOUBLE DIPPING SYSTEM
A high-speed Litzler system to treat Nylon,
Polyester and Aramid tire fabrics is suitable for high
production rates and multiple processspecifications.
These systemsare capable of speedsup to 130 mpm.
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. The LMMI recipe manager automatically adjusts
speed, oven temperature, tension, stretch and
dip pick up, especially simplifying short
production runs for the operators.
Today's competitive business environment
demands excellence in manufacturing.
To meet the tire cord industry's high production
and safety standards, Litzler uses a computerized
control center -- the Litzler Man/Machine Interface
(LMMI) -- in every Fabric Treating System'
LMMI, the nerve center of the Litzler Fabric
Treating System, monitors and records vital
production information through hundreds of sensors.
By controlling the critical functions via recipe
management, LMMI assures that each roll of fabric
is of the highest quality.
Time, temperature and tension become a function
of the computer.
. The main operator interface is an easy'to-use,
menu-driven graphic display.
. LMMI prints a quality report for every roll.
. The system PC stores data for historical trending.
. A built-in security system prevents human elror.
. LMMI's SPC program encourages continuous
improvement by providing real'time
perforrnance inforrnation and comparing it with
defined high and low control limits.
. LMMI uses standard commercial software to
allow access to custom programming.
o Temperature
the PLC.
o
PID loops are controlled
through
. LMMI includes the Litz-Link modem for
communication with our service center.
DRIVES
ACINVERIER
AC INVERTER DRTVES
Litzler Vector AC inverter drives provide the highest
level of accuracy available and are controlled by
LMMI to maintain speed, tension and stretch.
. Stretch is maintained
setpoint.
within +0.1 percent of the
. Tension is maintained
total rated value.
within f).1 percent of the
. Speed is maintained to an accuracy of 10.01
percent of set speed.
. Precision control allows a speed change from
mddmum to zero without loss of tension or
damage to the tire cord.
AC inverters have a power factor up to .98 and are
powered through a common DC buss. Each drive
redistributes power depending on whether it is
motoring or regenerating. This
power distribution reduces utility
costs by using
only 25 to 30 percent of the total
rated (kw) of all
drives.
ACCESS0RTES
SAFETY CHUCKS_
Litzler safety chucks
feature convenient
handle operation and
easily replaceable inserts. A pair of chucks hold fabric
packagesup to 3000 kg.
GUIDING AND SPREADING- Guiding and
spreading is an important element to quality line
operation. Litzler guiders and spreaders have:
. Discriminating
sensoni and transmitters to
elirninate interference from other light.
. O-frame mountings that feature sensors and
transmitters across the full machine width. This
allows automatic Suiding and spreading of
different web widths.
. Electro-mechanical
action.
FLEXERS-Litzler offers
two field-proven softening systems:
. BAR-FLEX uses air-operated knife bars to
vary the break angle and adjust flex pressure
and depth. Brush rolls and vacuum systems
are available.
o GEAR-FLEX features two air-operated gear
rolls that engage the fabric in a "biting"
fashion.
units for responsive gulding
r Sensors and transmitters designed for densities
as low as 8 epi (3 ends per cm).
INSPECTION MACHINEThe Litzler
inspection rewind machine is available for offline inspection of finished products. The
inspection machine features guiding, spreading
and tension controls.
ROLLINERS_
AUTO WRAP- An automatic wrapping machine
is available to seal finished packages for
protection during storage and shipping.
Litzler's patented Rolliner three-finger
spreader is used where selvage spreading is
critical. The patented three-finger action
spreads the fabric edges to ensure proper end
count.
AUTO SPLICE DETECT- A system that senses
and tracks the sewn splice from letoff to windup
through the LMMI.