The New Co-Extrusion-
Crosshead from Rosendahl
The most common coating variant for LV power
cables, the “tandem extrusion”, is increasingly
being replaced by so-called “co-extrusion”.
On the one hand, because this production
Cables, especially for the field of building cabling,
process is more efficient and thus more cost-
have ever thinner and optimized wall thicknesses.
effective for the manufacturer, and on the other These products require a high degree of precision
hand because it is becoming inevitable due to
in their manufacturing process. During the
the many different extrusion materials.
development of this new crosshead, Rosendahl made
special efforts to ensure that commercially available
The new crosshead RX 40 MB 2.1.I from Rosendahl
products can be processed from a diameter of only 3
was specially developed for these requirements.
It enables the co-extrusion of different material
combinations, such as EPDM with PVC. And all with
The head is also liquid-tempered, which means that,
only one crosshead!
if necessary, very low plastic melt temperatures can
be processed. Due to thermally separated material
14 WIRE NEWS September 2019