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Coil to coil Slitting Lines
Dassnagar
designs and manufactures world class Slitting Lines for processing of hot and cold
rolled steel, aluminium, copper, brass and foils. Dassnagar
single and double loop Coil to coil Slitting lines are widely used to process full width coils into a number of shorter width coils,
called "mults", with repetitive slitting accuracy at high speeds.
Variable speed Slitting Line is available on request. With over 50
turnkey Coil to Coil Slitting Line installations in steel plants and toll
processors, you can rely on us for Slit Coil Processing needs.
Dassnagar high speed slitting lines
can process HR, CR, GP, CRGO, and special purpose grades of steel as well as non-ferrous strips like aluminum and thin foils. The capacity of
these lines ranges from 300 to 2000 mm (width),
0.10 to 12 mm (thickness) in strips
and 20 to 60 microns in
foils. Input coil weight can go up to 40 Mt and line operating speed
of 500 MPM has been achieved.
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Eccentric Slitter
The heart of a Slitting line is the Slitter performance. The most important factor affecting the long-term
accuracy of Dassnagar slitters
is its double eccentric arbor design. In
this configuration, the separating forces of slitting are absorbed
by the housings instead of the adjusting mechanisms. The
tolerance on the arbors i.e. parallelism and roundness are in
microns resulting in consistent slitting with repetitiveness even
after 5 years in continuous operation.
Both
arbors are supported on preloaded tapered roller bearings, eccentric
sleeves, and robust housings which virtually eliminates any
horizontal or vertical movements. As a result of this sophisticated
design,
Dassnagar slitters operate over
long productive lives with minimal endplay and run-out accuracies.
Quick
change of Slitter head
A
mechanical arrangement is provided for quick change of slitter head
reducing 'downtime' significantly. 4 spare slitter heads can be accommodated
by the system.
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Slitting Line Equipment
Dassnagar provides a variety of productivity and quality enhancing components that can
provide cutting edge in today's increasingly tough business scenario. They
may be used in new lines or retro-fitted to existing ones. These products
reduce downtime for coil maneuvering, for example a coil handling system may
include a turret type
unwind or a rewind, coil down enders and
conveyors. Auxillary equipment may be floor or pit mounted
coil cars, powered
turnstiles,
thread assisting systems, frictionless tensioning devices like belt
bridle tensioning system and scrap handling equipment like scrap
chopper,
scrap baller
and scrap winder. We also offer overhung/stub and cone hydraulically expansible
mandrels
as spares for all strip thickness and width.
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Edge-Trimming
Dassnagar
also manufactures side - trimmers. The side - trimmer heads can be
injecta mounted, inter-changeable with the slitter heads, or can be
built into dedicated edge-trimming lines.
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Quick Change Systems
Dassnagar quick change systems like
automatic tool changer,
slitter head change, enables reduction of down
time enhancing productivity. A good example is our Belt Wrapper which
automatically initiates wrapping on the recoiler mandrel, without gripping and
bending the tail. Coupled with poly-urethane mandrel sleeve,
the belt wrapper protects till the last wrap end of the strip
thereby eliminating wastage of the tail material. Our Scrap
Balers,
Choppers and Winders are proven scrap handling systems that provide
processors with efficient scrap handling.
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Dassnagar Slitting Line Benefits
- wide processing range 0.10 to 15
mm, 400 to 2500 mm, input coil
wt 40 Mt for
strips, 40 to
60µ for foils,
- suited to CR, HR,
GP, CRGO,
foils and non-ferrous
metals like aluminum, brass,
copper and more,
- two speed line for different thickness range (optimise the ratio
of electrical cost to productivity)
- automatic strip threading and sleeve removal,
- fully automatic coil peeler for precise feeding of the coil
leading end into the flattener entry pinch roll unit,
- double eccentric slitter head with
quick head change mechanism,
- crop cut hydraulic shear
to square the lead end and for coil parting,
- frictionless tensioning device - belt-bridle tensioner
unit,
- minimal burr on strip edges due to high running accuracy of
knife arbors,
- constant distance between the last deflector roll and the
winding position of the recoiler due to continuous traverse of the
back tension unit during winding operation; hence absolutely
straight-edged recoiling (additional separator disks not
required),
- incorporate a variety of auxiliary component equipment like
scrap handling systems, side trimmers, edge guides, thread assist
systems, turret type unwinds/rewinds, coil cars, sophisticated
coil down layers and high production packaging systems,
- no manual interferences required because the scrap baller is pit
mounted,
- high degree automation enables precise process and production control,
- servicing within 48 hrs in any corner of the world,
- readily shippable spare parts,
- in house manufacturing of all equipment
to maintain quality.
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