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machinery feature | Lab compounders


screw configuration adjusted accordingly. This method can be used to change the unit to 30:1 or 20:1 L/D. Metering or venting ports are located at 10D, 20D and 30D, with side feeding capability at 12D and 22D.


The TSE 20/40 is offered with a 7.5 hp motor and 600


rpm screw speed, or with a 16 hp, 1,200 rpm drive. The latter is said to process throughputs from as little at 250 g/h up to 20 kg/h depending on material. Brabender is also developing a lower-cost bench-top


B&P’s Tri- Kneader provides three axial oscilla- tions of the shaft for each revolution, instead of the single stroke used in traditional kneaders


features a single screw with its mixing flights interact- ing with stationary pins on the barrel wall to provide the required mixing interface. In traditional designs, there are three or four flights providing mixing interfaces each time the screw rotates. B&P says that the Tri-Kneader can have a maximum of 12 flights interfac- ing six times to provide up to 72 pin/flight interfaces in a single revolution, thus improving mixing levels. Lazorchak presented a paper at AMI’s ‘Minerals in Compounding’ conference last month in Atlanta, GA, USA, that illustrated the TriVolution Tri-Kneader’s ability to compound mineral formulations with greater efficiency and control, as well as handling loadings greater than 60%. ❙ www.bpprocess.com


Brabender now offers removable barrel liners for its TSE lab-scale twin-screw extruders. This development brings much shorter machine downtime and changeo- ver times, says Kevin Van Allen, vice president sales and marketing for the company’s US chemical division. The barrel liner, now available for its TSE 20/40 lab


Brabender is adding


removable


barrel liners for its TSE lab-scale


extruders to speed up


changeovers


compounder, reduces changeover time from two hours to about 15 minutes. Screw swap out takes about 15 minutes, Van Allen says, adding; “Processors running colour concentrates will find it tremen- dously shortens downtime.” The TSE 20/40 is a


stand-alone co-rotating unit with a segmented screw and clamshell barrel. The standard design is a 20 mm diameter screw and 40:1 L/D. Users that require shorter barrel and screw lengths can sheath the first 10D of the screw with a special blank sleeve. The material feed device is attached on a downstream port on the barrel and the


34 COMPOUNDING WORLD | December 2012


version of its KETSE 12/36 twin-screw mini-compound- er, slated for release during the second quarter of 2013. The standalone KETSE 12/36 features a 12 mm diameter screw with 36D processing length and a 3.2 hp, 600 rpm drive. Van Allen says this unit has an updated control system that is more user-friendly and allows for better tracking of motor load. A removable barrel liner is also an option. ❙ www.brabender.com


Buss has been busy this year introducing its latest MX 30 four-flight laboratory kneader at trade shows around the world, including Wire in Germany, NPE in the USA, Chinaplas in China and Plast in Italy. The company reports high levels of interest from compounders and took orders for its first production series. Featuring a 30 mm diameter screw, the MX 30 is the


smallest machine in the MX range and according to Buss is the first laboratory kneader to feature four flight technology. It has a maximum screw speed of 800 rpm and is rated for outputs of 5 to 25 kg/h. The maximum processing temperature is 280o


C.


Like the larger machines of the MX Series, the MX 30 is particularly suitable for the compounding of heat- and shear-sensitive polymers and for the production of compounds with high loadings of reinforcing materials and other fillers. It is equipped with a discharge extruder, a pelletizer and a user-friendly control system, offering the same process versatility as larger models in the MX Series. Buss says that processing


parameters obtained with the MX 30 can be reliably scaled-up and applied to larger MX kneaders because of the lab machine’s high conveying stability and linear output-to-speed ratio. In addition


to being used as a laboratory extruder for formulation and product development, the MX 30 is also suitable for custom-


www.compoundingworld.com


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