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FEEDERS | MACHINERY Feeding with efficiency


Feeding technology and equipment plays an important role in efficient compounding.Peter Mapleston takes a look at some of the latest developments


Feeders are essential components in any compounding plant, ensuring materials are introduced to the compounding extruder reliably and consistently. Suppliers continue to optimise the performance of their designs and the past few months have seen a number of new and often novel additions to the feeding equipment options for compounding plant and other continuously- running equipment. This article provides a run- through of some of the latest developments. German equipment maker Brabender


Technologie says it has focused its attention mainly on increased flexibility and safety with its recent developments in bulk materials and liquids feeding, weighing, discharging and flow measurement products. The company says servo motors are set to become standard for feeders, pointing out that they provide a wider speed range compared to standard AC motors, while still maintaining torque. They also show almost no speed fluctuation in situations where high torque is


required. “The servo drive eliminates the need for a second pair of screw and tube, thereby reducing changeover downtime of the system,” says the company. Brabender has also addressed the flexible connections in its material delivery systems. Manufactured from highly durable, tear-resistant liquid silicone rubber (LSR), it says these are essential in sealing upstream and downstream processes and are especially important where hazardous ingredients are being used, as the connections are relied upon to prevent any potentially harmful toxic dust escaping from the system. “This new design provides highly flexible characteristics essential for ultra-low feed rates below 50g/h,” says the company. The company says it has also developed a new


shaft sealing system for use wherever screw or agitator shafts are required. It has added a purge system to its radial shaft seal that incorporates an inner pressurized chamber to ensure that, in the rare event of a seal leak, dust remains in the chamber. The shaft seals act as a barrier in both directions, protecting the motor on one side and the ingredients on the other. Another new addition is a clear vertical outlet. Moulded in PETG, which


www.compoundingworld.com


Main image: Penta’s Codomix system is designed to dose, mix and convey powder materials to the compounding plant


Left: Brabender says clear PETG outlets will be available on all models through 2021


November 2020 | COMPOUNDING WORLD 39


IMAGE: PIOVAN GROUP


IMAGE: BRABENDER TECHNOLOGIE


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