EoW July 2009

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EuroWire – July 2009 30
technology news
The challenge in distrib-
utor design is to find the
optimum dimensions
of the distributor to
attain a balanced flow
at the exit. Rosendahl’s
distributor concept
is said to guarantee
homogeneous material
flow – independent of
the processed materials
and independent of the
output. This optimised
material flow provides
high centricity and allows
a reduction in average
wall thickness and therefore reduces
the manufacturing costs. With the help
of the latest finite element simulation
programmes, Rosendahl conducts
mechanical calculations and rheological
analysis of its crosshead series.
The simulation also enables analysis
of pressure, temperature rise, velocity,
stress and strain rate distributions over
the entire simulation domain. Especially
when designing the distributor, it is
important to adapt the distributor’s
channels to the flow path of the melt.
In order to offer a broad material spectra,
Rosendahl partnered with university
institutes to research a wide range of
materials for the cable industry, and now
offers a material data base that includes
standard as well as special material
(such as foamed material blends,
LSOH or XLPE). Rosendahl’s ongoing
communication with polymer manufac-
turers guarantees up-to-date technology.
Rosendahl, as supplier of extruders,
crossheads and of complete extrusion
lines, is in a position to investigate and
understand the polymer extrusion
process.
The integrated simulation results,
together with the experiential data, have
enabled optimisation of the head design
and ultimately to achieve a high quality
of extrudate.
Rosendahl Maschinen GmbH – Austria
Fax: +43 3113 5100 59
Email:
Website:
Crosshead
developments
▲ ▲ RX45 with a ROEX extruder
OMR has recently increased its line of
completely automatic winding machines
for wires prior to braiding process.
Design and engineering have brought
innovative solutions that allow the
versatility of different dimensions of
bobbins together with the possibility of
fastening the final head with the snap or
clip system.
OMR Srl – Italy
Fax: +39 03536 0354
Email:
Website:
New Italian products
Precimax Engineers Limited India
has been engaged in the design,
manufacture, supply, installation
and commissioning of industrial
metallurgical plants for heat treatment
and surface coating of wires since 1963,
and is very active in the Indian and
overseas market.
The company has supplied a number of
wire galvanising furnaces, bell furnaces,
patenting lines and stress relieving lines
for heat treatment and surface coating
of wire.
At present, Precimax is supplying a
complete galvanising line for wire to a
Sri Lankan manufacturer.
Precimax Engineers Ltd – India
Fax: +91 22 275 44917
Website:
Wire processing
furnaces and lines
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