Page 75 - Plastics News September 2016
P. 75
PRODUCT NEWS
ZAMBELLO counter-rotating twin-screw extruders
Parallel type TST range
Although the range of gearboxes for counter-rotating The TST range (Twin Super Torque) is available in two
twin-screw extruders used for medium, high and very versions: TST-H and TST- 2H. Both series offer very high
high torques is already very wide, Zambello updates it performance rates.
constantly both with new sizes of standard products and
tailored gearboxes for the exacting needs of customers. TST- H series - With a transmissible torque
density up to 20 Nm/cm3 per shaft.
NRB series - With a transmissible torque density
up to 17 Nm/cm3 per shaft The gearboxes of this series are designed for exacting
applications, where a high torque is required, which
The gearboxes of the NRB range have a horizontal shape is transmitted by means of a single reversing unit. The
(mounting position B3), which requires a connection to connection to the electric motor is obtained by means of
the electric motor by belts and pulleys. As a matter of an elastic joint. The reduction ratios available go from
fact, the reduction ratios available cover a ratio up to a i=14 to max. i=80.
maximum of i=25.
TST- 2H series - With a transmissible torque
ZT3 series - With a transmissible torque density density up to 22.5 Nm/cm3 per shaft.
up to 17 Nm/cm3 per shaft
The gearboxes of the TST-2H series present the highest
The gearboxes of the ZT3 series have approximately technical level for which these are the best worldwide
the same features as the NRB series, but have a vertical for heavy-duty jobs. The transmission of the torque
shape (mounting position B7). In this case the connection is obtained by means of a double reversing unit. The
between gearbox and electric motor is carried out by reduction ratios available go from i=14 to max. i=80.
an elastic coupling. Due to the possibility to mount the
electric motor in the U arrangement, the ?nal result is a Conical type
very compact extruder. Reduction ratios available go from
i=14 to max. i=80. As a completion of the range of gearboxes for counter
rotating extruders, Zambello proposes the new ZC3
gearboxes for conical twin-screw extruders. At the
moment the new gearboxes are available in three sizes,
which are suitable for extruders having screw diameters of
55 mm, 65 mm and 80 mm. The essential feature of these
gearboxes consists of ground conical gears according to
AGMA 11 - DIN 3. Like the entire range of Zambello, also
the gearboxes ZC3 enable an extremely high transmissible
torque
Examples of application:
Civil building items
PVC products (doors, windows, pipes)
Granulates
Petrochemical products
75 S e p t e m b e r 2 0 1 6 | Plastics News
