CPM Extrusion Group products

Revolutionary and disruptive technology for continuous processing applications requiring low energy (i.e. low temperature) mixing and efficient degassing of melts. Developed by Josef A. Blach in 1998, the RingExtruder RE® is a multi-screw extruder with twelve (12) co-rotating screws arranged symmetrically around a stationary core; each shaft rotates in the same direction on a fixed axis. The outer barrel and the stationary inner core enclose the screws with the same gaps as found in twin-screw extruders. Transport of material takes place in a double helix around the stationary core and around each screw (click on the image to visualize material flow in the RingExtruder RE). The intermesh area between the screws, also known as the apex, is used extensively in the RingExtruder RE as the central part of the process technology. In the intermeshing section, material is passed to the adjacent screw with a change in flow direction, resulting in elongational flow.