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Why
Underwater Pelletizer !!
In
Strand Pelletizing System, the Pellets are not consistent
in dimensions and having inclination to carry moisture.
The wastage is also very high.
In
water Ring Pelletizing System, the material tends
to smear over the die plate and cutting blades,
due to dry cutting at the die face.
In
Underwater Pelletizing System, the molten polymer
emerges from the Die holes; it is cut into pellets
by the rotating blades under controlled temperature
water. Hence, the cut pellet is immediately quenched
and solidified. In turn, the water transports the
pellets to a centrifugal dryer where pellets are
dried and discharged to classifier.
The
process water coming out from the drier is passed
through the fines removal screen to make the system
free from impurities, which in turn pressurized,
temperature regulated, and returned to the pelletizer
by the tempered water system. The process water
is contained in a closed loop so there is minimal
water loss and very little housekeeping involved.
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Spring
Loaded Pelletizer
- Neoplast
pelletizer is designed with a spring-loaded cutter
to adjust blades against the die face.
- Different
springs are provided in order to properly match
blade, die and polymer combinations.
- The
MOC of the blade would be S.S. 304 with 6 Spokes
cutter hubs.
- Hardness
of the blade would be 45-50 HRC.
- The
cutter blade RPM can be 100 to 3600, controlled
through AC Variable frequency Drive.
- Die
and cutter blades are provided with specially treated
material to ensure long life.
- All
water contact parts made from SS 304 to ensure corrosion
and
contamination free end products.
- Ideal
horizontal melt flow; hence no dead areas. Moreover,
simple access to die plate and cutter hub replacement
possible with lowest down time.
- With
advantage of proven pelletizer design, we guarantee
for the best quality of pellets, lowest energy costs
and simplified maintenance.
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Centrifugal
Dryer
- The
Centrifugal Dryer is provided with Agglomerate catcher,
Exhaust blower & Diverter Valve
- A
countercurrent airflow generated by an external
fan removes residual surface moisture and produces
a slight vacuum to prevent any humid air from pellets.
The residual surface moisture (ppm) would be 0.05
% or less by virtue of our specially developed dryer
design.
- Rotor
is dynamically balanced and hence vibration free
performance.
- All
water contact parts are made from SS 304.
- All
process valves are pneumatically actuated and hence
ease of operation.
- Hinged
doors, leak proof screens, pellet free rotors, and
precisely fabricated components are some of the
standard features
- An
agglomerate catcher is included to remove oversized
lumps of polymer before they enter the dryer.
Agglomerates fall into the fines removal waste tray
from the slurry inlet.
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Fines
Removal Sieve (FRS)
- A
fines removal screen is included for collection
and disposal of fines particles during process runs.
- The
FRS removes all the fine particles higher than 0.15
mm in size.
- Neat
& clean way of collecting fines & impurities
from process water.
- Reduces
maintenance of TWS components.
- The
process water contaminated with particles is first
conducted into a collection chamber and then flows
evenly over the curved screen. The fines are separated
and collected.
- Comb
type SS construction processes water upto 30 m3/hr.
- Available
with Automatic system only.
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Tempered
Water System (TWS)
- The
tempered water system is the internal conveying
system of the pelletizing process and consists of
centrifugal dryer, agglomerate catcher, water tank
with heater, heat exchanger and exhaust fan.
- Heat
exchanger of adequate capacity with automatic control
which ensures a constant and desired process water
temperature.
- SS
water tank with heater & temperature controller.
- Automatic
water level controller with solenoid valve. Digital
flow meter is also incorporated.
- TWS
system is supplied with By-Pass line to avoid freezing
of die.
- All
process ball valves incorporated in the system are
pneumatically actuated & controlled by PLC.
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Control Panel
- The
Electric Control Panel is precisely pre-wired and
labeled as per the international code & it is
easy to plug at the time of installation.
- Electrical
control panel components are of international standard
IP 55 or equivalent.
- The
cutter blades RPM can be controlled by AC variable
frequency inverter drive and soft start up of the
machine.
- The
control panel is also equipped with temperature
controllers for die plate and adaptor. Digital current
indicator for adopter, die and pelletizer drive
is also provided, with overload audio-visual alarm
to shut down extruder.
- Control
Panel also incorporates PLC with required process
interlocks to ensure operators safety.
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Advantages
of Underwater Pelletizing System
-
Moisture content (ppm) would be as low as 0.05 or
less
- Uniform
& Smooth pellet surface
- Compact
& versatile
- Fully
automatic and close loop system.
- Low
Noise - The thermoplastic is cut underwater in a
semi-molten condition.
- Simple
Startups - Our Systems can be started with the push
of a single button.
- Pellet
size from 2.0 mm to 3.8 mm.
- No
product oxidization
- Custom
Design - We can provide custom designs to meet your
specific requirements.
- Single
and double row die in one and two piece construction.
- Low
tooling costs, Variable tool speed & Automatic
tool readjustment
- Low
scrap through automation & Clean operation
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Applications
Suitable for polymers like LDPE, LLDPE, XLPE, PP,
PE, TPR, NYLON, PS, PVC, Engineering plastics, Filled
materials etc.
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| Primary Pelletizing |
Compounding |
Food Grade Polymer |
R&D Applicarion |
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| Thermoplastic Elastomer |
Medical Grade Polymer |
Masterbatch Production |
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