Reifenhäuser : Extra Large Pipe Die Heads
In cooperation with Pipelife, a Norwegian pipe manufacturer, Reifenhäuser is building an extrusion unit for integration into a pipe plant suitable for production of large HDPE pipes of up to 2000 mm diameter. Die-heads of this size will considerably increase the diameter range of plastic pipes, which is presently limited to 1600 mm. The pipe extrusion line will be provided with a single-screw extruder with screw diameter of 150 mm and 33 D (L/D) length that has been especially designed by Reifenhäuser for high performances. The advantages of this extruder lie in an improved melting efficiency, a good homogenising performance and a high throughput capacity at low melt temperature. The large pipe die-head of special design, features a spiral melt guiding mandrel that uses Reifenhäuser’s long-standing know-how for large film extrusion dies. Both the die geometry and the surface coating of the melt channel have been adapted to the low flow rate. The die-heads are available in different dimensions suitable for production of pipes from 1600 to 2000 mm diameter and a maximum wall thickness of 135 mm.