Krauss Maffei Extrusion exhibits at NPE 2009 in Chicago

The machinery on display at NPE 2009 includes:-

• The ZE 60 R-UTX twin-screw extruder, which is designed for the processing of natural fibres without energy-intensive preliminary drying. The R version provides large free volume and high torques and is suited for processing compounds with high nature fibre content at maximum output speeds.
  The UTX series excels in low shear energy input, excellent mixing performance, frequent melt surface renewal and low gas speed for efficient vacuum degassing. The configuration of the screws and processing sections allow the extruder design to be adapted for different fibre types, moisture contents (up to 12%) and fibre percentages (20% to 70% max). Suitable for processing wood flour, wood fibres, cellulose, flax and hemp.

• Unique in-line colour measuring system - provides in-line quality control based on melt colour measurements at the discharge from the die. This helps to avoid detrimental reflections normally caused by colour measurements carried out on pellets. The spectrometer is designed for monitoring the compound quality during colour changes and reduces start-up scrap. It also detects immediately any defects in material metering or pigment premixing. 
  With transparent melts like PET, PC and PS, a transmission polymer melt probe ensures close colour tolerances, while a reflection polymer melt probe is used with colour concentrates.