Feeders Solution for Fibre Feeding
With its new fibre feeder, Brabender Technologie is breaking new ground in the feeding of long and uneven fibres.
While conventional feeders used to be restricted to short and compact bundles of fibres such as glass fibres, for example, the new feeder is now capable of accurately metering natural fibres, wood fibres, long carbon fibres and film chips. Feeding of such long fibres is made possible by using a special fibre screw, a large steep walled hopper and a novel design and special position of the stirring agitator in the hopper. “This unique and innovative design promotes forced ingredient flow into the screw”, explains Norbert Marek, who provided the idea for the fibre feeder. Considering that the flow characteristics of the ingredients differ significantly, design details vary in each individual case. The company maintains confidentiality regarding the exact construction of the feeder. What is no secret, however, is how important the control system is for reliable fibre feeding. The ratio of feed screw and stirring agitator speeds is essential. “Our CM plus or CB plus controllers are responsible for this”, emphasises Norbert Marek. The optimum ratio of screw and agitator speeds can be individually determined by feeding trials in Brabender's test lab to be adjusted accordingly during feeder start-up.