Chemical Engineering September 2014 - 30

Newsfront
are lowered and fastened back into
the head. Quality parts with a new
color can be manufactured within a
few shots.
When it comes to extrusion
Process Max CE Nova 041913_Layout 1 4/19/13 8:09 PM Page 1
blow molding, Graham has also
developed a configurable version
of its rotary-wheel extrusion blow
molder for high outputs of bottles
(Figure 3). " It is now configurable
to accommodate a range of bottle
sizes used in beverage, dairy and
household products on a single
platform, " says Schroeder.
And, the American Kuhne brand
(a part of the Graham Group;
www.americankuhne.com), offers
a modular extruder. " Interchangeable
extruders, the barrel, screw
and feed section, are available on
one common, stationary base, " says
Schroeder. " This allows one extruder
to swing into place, rapidly
replacing the other, enabling offline
purging or service, while another
extruder can be preheated and
aligned, minimizing downtime. "
Flexibility is equally important
1967 Nova Pro Street
in the compounding industry, says
Paul Lloyd, business unit director
with Farrel Pomini (Ansonia,
Conn.; www.farrel-pomini.com).
" In the compounding industry, the
ability to adapt in markets that are
constantly changing is important.
There are frequent formulation
changes based on the development
of new additives, new customer requirements
or new market opportunities, "
he says. " So the ability
to have an asset that is flexible is
desirable because extrusion equipment
is expensive and traditionally
difficult to change out. "
To help provide flexibility, Farrel
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30 ChemiCal engineering www.Chemengonline.Com September 2014
Pomini offers a two-stage machine
with a mixer at the top and an extruder
underneath, which allows
the production of quality compounds
in the mixing section and the pressurization
in the extrusion section.
In traditional extruders, these two
processes are combined, explains
Lloyd. Providing a two-stage process
with a mixer and extruder that
are separate from each other allows
additional process variables to be
employed, which allows flexibility
to be achieved through the control
system rather than making mechanical
changes as you would on a
traditional extruder. " This allows a
single machine to process a range of
materials without any mechanical
changes to the equipment, " he says.
The company's latest CP4000
Compact Processor (Figure 4) allows
more flexibility in variables such as
throughput rate, rotor speed, temperature
and discharge-gate position
to improve or change mixing
parameters. " Because of the ability
to make changes via programming
the necessary process changes into
the recipe on the control system,
the machine is inherently more
flexible than a traditional extruder,
http://www.americankuhne.com http://www.farrel-pomini.com http://www.carverpump.com http://adlinks.che.com/50980-14 http://www.Chemengonline.Com
Chemical Engineering September 2014

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