Combination of two twin-screw extruders for PVC-U pipe production

Twin-screw extruder combination produces PVC-U pipes at 2,000 kg/h

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  • Combination of two 36D twin-screw extruders
  • Savings of 0.02 kW per h/kg of material throughput
  • The process concept of the 36D twin-screw extruder

At the upcoming K2016 show, KraussMaffei Berstorff will show how to increase even further the output of its 36D twin-screw extruder series. The combination of two KMD 108-36 E2/R twin-screw extruders produces PVC-U pipes at a throughput of up to 2000 kg/h.

High-output production in tight spaces

The combination of two KMD 108-36 E2/R twin-screw extruders reduce the space requirements by about one-third. This enables production at the highest output, even in tight spaces. This system is of particular interest to processors who manufacture PVC-U standard pipes in large quantities.

“Higher output with a smaller footprint cuts production costs over the long term,” says Peter Roos, President of the Extrusion Technology Segment, describing the extruder combination.

Savings of 0.02 kW per h/kg of material throughput

Significant energy-savings are another benefit. The energy requirements are lower compared to a larger extruder that uses the twin-strand. The high-performance combination saves 0.02 kW per h/kg of material throughput compared to a KMD 164-32/R.

The process concept of the 36D twin-screw extruder

The main focus is on the long, effective preheating length, which ensures a balanced combination of shearing energy and heating energy, optimal material processing and thus very good melt homogeneity. In addition, it ensures low compression values. Wear-resistance is guaranteed by the deep-nitrided barrels and the molybdenum welded layer on the screw threads. This allows to process even higher-filled PVC compounds.

Picture: Space-saving concept with KMD 108-36 E2/R twin-screw extruder for high-output PVC-U pipe extrusion (source: KraussMaffei Berstorff)
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