WIRE NEWS WN September 2019 - Page 14

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. mm. 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