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Rosendahl has been developing extrusion machinery for wire and cable applications for nearly 50 years. Highly skilled and experienced staff in design engineering, process engineering and manufacture has now enlarged the product range. The Rosendahl Crosshead Series applies to the needs and requirements for different types of cables and which fits every Extrusion Line. The enlarged Series comprises of different Crossheads for cables from 0,03 mm up to 110 mm core diameter for different application areas.
New Technology in Distributor Design
The challenge in distributor design is to find the optimum dimensions of the distributor to attain the balanced flow at the exit. Rosendahl’s distributor concept guarantees homogeneous material flow - independent on the processed materials and independent on the output. This optimized material flow provides high centricity and allows to reduce average wall thickness and therefore reduces the manufacturing costs. With the help of newest finite element simulation programs Rosendahl is able to conduct mechanical calculations and rheological analysis of the Crosshead Series.
The simulation also enables to compute 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 researched with university institutes on a wide range of materials for the cable industry and now offers a material data base that includes standard as well as special material (Foamed Material Blends, LSOH, XLPE, etc.). Rosendahl’s continuous communication with known polymer manufacturers guarantees up-to-date technology.
Rosendahl, as supplier of Extruders, Crossheads and of complete Extrusion Lines, is in the position to investigate and understand the over all polymer extrusion process. The integrated simulation results with the experiential data enabled to optimise the head design and ultimately to achieve perfect quality of the extrudate.
For detailed information see page Rosendahl Crosshead Series.
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