offering in line with current restrictions and protocols. “With many countries still having travel restrictions and companies limiting travel, we are focused on increasing our virtual presence. For example, this includes online training for customers looking to learn about new equipment, how to adapt current machinery to a new polymer or filler material, maintenance and operational training,” says Alan Malott, Global Product Manager, Continuous Mixing Systems. “While we will still continue running trials on our pilot equipment and hosting customers during these trials, we have also begun to live-stream and record tests for customers while running their processes,” he says. The TriVolution Compounder is a development

of the company’s CK-Series single stroke continuous kneader extruder. That consists of a single shaft comprised of segmented 3-flighted mixing elements and conveying elements that strokes forward and back once for each 360° rotation. The inside of the barrel is lined with three rows of pins in a 3-flighted system mixing. “The shaft on the TriVolution strokes forward and

back three times per each full revolution of the shaft,” Malott says. “This allows us to increase the rows of pins in the barrel from three to twelve. Mixing elements have also been improved, moving from the 3-flighted system to elements with 8, 12, 16 and 24-flights.” Elements with 8-flights are more effective at conveying material, meaning that conventional conveying elements are not required after the main feed port, and there is no need to move pins when switching mixing elements, he adds. The machine is also fully wiping, so there are no dead spots for material. “These design modifications allow the TriVolution

to operate at a lower rpm than the single stroke system. The B&P Single Stroke Kneader operating at 800rpm would be a comparable size to the TriVolution operating at only 200rpm,” Malott says.

“Through many trials on our pilot systems, a CK-60 continuous kneader and our 60-mm TriVolution, we have found that we are able to reach much higher fill levels of up to 90% and at higher throughput rates. It has also expanded the types of polymer systems we are able to work with. Historically, the kneader has been limited in the range of polymers it is able to process. Typical systems are used for PVC or other low melt temperature materials. The TriVolution has easily processed these low melt materials, such as PVC and EVA, as well as being able to process nylons, PP, PE, wood plastic composites, and many other processes typically only processable on co-rotating twin screws.” Farrel Pomini has developed continuous mixing equipment ideally suited for processing recycled and other temperature-sensitive materials. Principle applications include highly-filled compounds, white and black masterbatch, flame retardant compounds, PVC and flooring. The company’s continuous mixing technology is based on two counter-rotating, non-intermeshing rotors running in a large free volume mixing chamber. The large chamber allows for liberal material circulation and good distributive mixing, while the specialised rotor geometry enables efficient levels of shear and dispersive mixing. The CPeX Laboratory Compact Processor is

Farrel Pomini’s most recent development, comprising an independently controlled mixer and extruder mounted on a single frame with a nominal production rate of 10–30 kg/h. The CPeX design allows compounders to conduct laboratory-scale product development trials, extend product application portfolios, expedite time to market and reduce development costs.

Shifting capabilities Economic and environmental influences placed on the compounding industry as a whole are leading processors to be nimbler and more efficient,


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