News
Technology
March 2014
63
A cable producer’s main goal is to offer
a high quality product to the market.
A high quality cable is the result of
many different factors. One of them is
the extrusion crosshead. What makes a
crosshead a good crosshead?
High centricity, for example. Rosendahl
focuses on a round crosshead body,
where the crosshead is heated up with
external heating bands. This ensures
consistent heat distribution.
High centricity is also achieved through
simulation in order to optimise the
distribution of the material flow.
Moreover, the simulation makes it
possible to control a minimum shear rate
and a minimum shear stress.
Through a special distributor design
the company also achieves high quality
welded seams. The extruded product has
sufficient relaxation and homogenisation
zones as well. A small volume in the
distributor enables short dwell periods
and quick colour changes.
For product handling purposes Rosendahl
has ensured that maintenance is kept
simple through using heating bands,
which are easier to change than heating
cartridges.
To reduce operating costs, it reduces
pressure on the crosshead distributor,
which enables gentle processing of the
material and gives the additional benefit
that the extruder and crosshead are less
stressed.
As producers need high flexibility in their
use of materials, Rosendahl has made it
possible to process different materials,
from HFFR to PA or PUR, all on one
crosshead.
The modular construction can easily be
changed from a fix centred to a manually
centred
crosshead.
The
Rosendahl
Crosshead Series RX includes crossheads
for extruding cables with a core diameter
from 0.03mm to 180mm. All crossheads
are offered as single machines and also in
complete lines.
Rosendahl Maschinen GmbH – Austria
Website
:
What makes a crosshead a good crosshead?
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Crosshead RX 110
Cold forging steel ML20MnTiB
Jiexiu Xintai Steel Limited (Xintai Steel) has developed and launched a new
cold forging steel, ML20MnTiB. Xintai Steel has worked hard on developing new
products since the successful launch of its Q345E steel, now producing Q195LD
stabilising steel for grade 4.8 bolts.
Jiexiu Xintai Steel Limited (Xintai Steel) – China Website
:
