Twente mixing ring

Figure 8.28 Schematic for a Twente Mixing Ring a) mixer with a cutaway section of the ring exposing the surface of the rotor, and b) flow path for the mixer...

Figure 8.30 Cross-sectional views [53] of the extrudate samples using a conventional screw with segmented tip for the testing of different types of dynamic mixers a) conventional screw with no mixer, b) Twente Mixing Ring, and c) Barr Fluxion ring mixer. The extruder was operated at a screw speed of 80 rpm and a letdown ratio of 220 1 of a white pigmented ABS resin to a black color concentrate...

Add-on s — Barmag add-on torpedo, Staro-mix , Maddox, Cavity Transfer Mixer (CTM), Twente Mixing Ring (TMR), the Extensional Flow Mixer (EFM), Dynamic Melt Mixer (DMX), static or motionless mixers (SM) from Koch, Ross, or Kenics, etc. 

More recent is the University of Twente mixing ring (or TMR). This device is made olf three parts smooth wall barrel extension, a torpedo with semi-spherical indentations (similar to these in CTM) and a perforated sleeve that goes between them. The sleeve provides shallow indentations. It slowly rotates between the torpedo and the barrel by the virtue of a drag flow. The flow in TMR is both dispersive and distributive. The advantage of TMR is its suitability to improve mixing in injection or blow molding machines [Housz, 1989]. 

Another cavity mixer is the Twente mixing ring (TMR) developed by Sem-mekrot at Twente University in Enschede, the Netherlands. It is similar to the CTM, but it has a freely moving mixing ring with circular holes instead of a barrel with cavities (see Fig. 52). This removes a number of the disadvantages of the CTM the TMR is easier to install, easier to clean, and the barrel is completely wiped. 

Twente mixing ring (TMR) a rotor and stator arrangement... 

Polyether ether ketone Polyethylene terephthalate Polypropylene Polyphenylene oxide Polyphenylene sulfide Plasticised polyvinyl chloride Polystyrene Polyvinylchloride Revolutions per minute Residence time distribution Styrene-acrylonitrile Scanning electron microscopy Styrene-maleic anhydride Standard temperature and pressure Twente mixing ring Underwriters Eaboratory Ultraviolet... 

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