Materials handling | processing feature The C-Flex ER has a standard
30-litre hopper, which is expand- able to 300 litres, and throughput rates to 6,000 litres/hour. Both models, singly or in multi-line configuration, operate with the company’s Gravinet SP control. The Spectroplus dosing and
mixing station, meanwhile, holds eight screw-dosing modules, each with throughput capabilities of 0.25 to 7,500 kg/hour. The system is designed to permit compounders to rapidly adapt operations to processing changes. Modules with twin screws and agitators can be installed for non-free-flowing materials, and the system is self-calibrating, which eliminates the need for manual weight samples. It is claimed that one operator can complete material changes, including colour, in 2-3 minutes. Developments are also underway in low-volume
applications. Brabender Technologie recently added a miniature feeder for laboratory use to its FlexWall line.
The FlexWall 20 can be config- ured as a volumetric unit or, when equipped with a digital two-wire load cell, a gravimetric feeder. Sales manager Walt Folkl says that in gravimetric mode throughput is 0.5 lb (0.2 kg) or less per hour. Material loads into a
polyurethane hopper with an internal screw and two external massaging paddles that maintain accurate flow even with difficult-to-
move additives. Tool-less assembly and
disassembly is facilitated with latches that connect the hopper to the housing, while screw removal is via quick clamp release. Cleaning and material changeovers are, as a result, easy and fast, Folkl remarks. Even lower volumes are achievable with the
RotoTube Feeder, for pellets and granules, and the MiniTwin Feeder, which Brabender says is one of the smallest screw-based feeders on the market. Configur-
Motan-Color- tronic’s C-Flex M dosing unit contains a flexible polyurethane hopper
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